WO2024222491A1 - Dental instrument and generation method therefor, and teeth correcting system - Google Patents

Abstract

Disclosed are a dental instrument for adjusting or maintaining a sagittal relationship between upper and lower jaws, a generation method for the dental instrument, and a teeth correcting system. The dental instrument comprises: a first shell-shaped body (1) for accommodating upper-jaw teeth, and a second shell-shaped body (2) for accommodating lower-jaw teeth, wherein a cheek side face of a posterior teeth area of the first shell-shaped body (1) is provided with a protruding part (11) in a protruding manner in the direction of the opposite jaw; a cheek side face of a posterior teeth area of the second shell-shaped body (2) is provided with a limiting part (21) which cooperates with the protruding part (11) in a protruding manner in the direction of the opposite jaw; and when the first shell-shaped body (1) and the second shell-shaped body (2) interact, a mesial face (111) of the protruding part (11) comes into contact with a distal face (211) of the limiting part (21), so as to apply a sagittal limiting force to the lower-jaw teeth. When a patient wears the dental instrument to achieve a stable occlusal state, the mesial face (111) of the protruding part (11) and the distal face (211) of the limiting part (21) are planes parallel to each other. Such a design of a contact face can solve the problem of deformation caused by local stress concentration when the protruding part (11) interacts with the limiting part (21).

Description

Dental device and method for producing the same, and dental correction system

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number "202310477626.0" and application date of April 27, 2023, and the Chinese patent application with application number "202321004939.6" and application date of April 27, 2023, and claims the priority of the above-mentioned Chinese patent applications. The entire contents of the above-mentioned Chinese patent applications are hereby incorporated into this application by introduction.

Technical Field

The embodiments of the present application relate to the technical field of oral orthodontics, and in particular to a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, a method for producing the same, and a dental correction system.

Background Art

Malocclusion refers to the phenomenon of tooth and jaw deformity caused by congenital genetic factors or acquired environmental factors during the growth and development of children. Acquired environmental factors include diseases, bad oral habits, tooth replacement disorders, etc. It can also be factors such as trauma and periodontal disease during the growth and development process. The factors and mechanisms of malocclusion are complex. Its occurrence process may be caused by a single factor and a single mechanism, or it may be the result of the combined action of multiple factors or multiple mechanisms.

According to Angle's classification method, malocclusion is divided into Class I malocclusion (neutral malocclusion), Class II malocclusion (distal malocclusion) and Class III malocclusion (mesial malocclusion). Among them, Class II malocclusion is one of the most common malocclusions in clinical orthodontics. The typical manifestations of Class II malocclusion are maxillary anterior teeth protrusion, deep anterior teeth overjet, deep overbite, open lip and exposed teeth, inward-inclined deep overjet, short lower face or deep chin-labial groove. For patients with mild to moderate mandibular retrusion, because the mandible is underdeveloped and the patients are in the growth and development period, and some patients are even in the peak growth and development period, the use of functional appliances such as Twin-Block, activator, Herbst appliance, Functional Regulator-II (FR-II) can stimulate and promote the forward growth of the mandible, and can play a good role in the correction of many Class II malocclusions such as deep anterior teeth overjet and distal molar relationship.

The Herbst appliance is a fixed bite advancement device for Class II malocclusion. Its mechanical part consists of a pair of metal sleeve systems, which are located on the buccal side of the upper and lower premolars and molar areas. Each sleeve system consists of a sleeve, a piston rod, two pivots and two screws. The Herbst appliance is welded to the buccal support retainers of the maxillary first permanent molar and the mandibular first premolar through two pivots on each side. Then the screw passes through the sleeve and the end axial hole of the piston rod to fix the bite advancement device (i.e., the sleeve and the rod inserted into the sleeve) to the shaft seat on the above support retainer. After the appliance is in place, the entire sleeve device is similar to forming a pair of artificial joints between the upper and lower jaws, keeping the mandible in the protruding position, opening and closing the mouth freely, and a little lateral movement. However, the disadvantage of the Herbst appliance is that the range of mandibular movement is limited to a certain extent.

In recent years, invisible braces have been chosen by more and more people because of their comfort, removability and aesthetics. In the prior art, there are also functional invisible braces that combine the functional correction effect of the Herbst brace with the invisible brace. However, since invisible braces are generally manufactured using a hot-pressing process, the position corresponding to the Herbst structure is a hollow structure. This hollow structure often collapses and deforms due to stress during use, and the above deformation often has a great impact on the correction accuracy. How to improve the structure of invisible braces to achieve the same or better correction effect as the Herbst brace is an urgent problem to be solved.

Therefore, it is of great significance to study a dental instrument that can adjust the upper and lower jaw position with both safety, comfort and high precision.

Summary of the invention

The purpose of the embodiments of the present application is to provide a dental instrument for adjusting or maintaining the sagittal relationship between the upper and lower jaws, a method for generating the dental instrument, and a dental correction system that effectively solve the above-mentioned problem, and to make the correction result more accurate and stable by improving the structure of the dental instrument.

To achieve the above-mentioned objectives, an embodiment of the present application provides a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, comprising: a first shell-like body for accommodating maxillary teeth and a second shell-like body for accommodating mandibular teeth, the buccal side of the posterior tooth area of the first shell-like body protruding towards the opposite jaw and provided with a protrusion, the buccal side of the posterior tooth area of the second shell-like body protruding towards the opposite jaw and provided with a limiting portion cooperating with the protrusion; when the first shell-like body and the second shell-like body interact with each other, the mesial surface of the protrusion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental device to reach a stable occlusal state, the mesial surface of the protrusion and the distal surface of the limiting portion are parallel planes to each other.

An embodiment of the present application also provides a method for generating a dental device, comprising: obtaining the sagittal position relationship of the upper and lower jaws in the correction target position according to the correction plan; determining the first digital dental model and the second digital dental model corresponding to the first shell-shaped body and the second shell-shaped body; wherein, the first digital dental model is provided with a protruding portion on the buccal side of the posterior tooth area facing the opposite jaw direction, and the second digital dental model is provided with a limiting portion cooperating with the protruding portion on the buccal side of the posterior tooth area facing the opposite jaw direction, when the first shell-shaped body and the second shell-shaped body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental device to reach a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes to each other; manufacturing the dental device: manufacturing the first shell-shaped body and the second shell-shaped body respectively according to the first digital dental model and the second digital dental model.

An embodiment of the present application also provides a dental correction system, comprising: at least one first dental appliance, including a dental appliance as described in any of the above embodiments, a dental appliance for adjusting or maintaining the sagittal relationship between the upper and lower jaws; at least one second dental appliance, the second dental appliance comprising a shell-shaped dental appliance for accommodating the upper jaw and a shell-shaped dental appliance for accommodating the lower jaw, the second dental appliance being designed to move multiple teeth from an initial position to a target position.

An embodiment of the present application also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for generating a dental instrument as described in any embodiment of the present application.

An embodiment of the present application further provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the method for generating a dental instrument as described in any embodiment of the present application is implemented.

The present application provides a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, a method for producing the same, and a dental correction system, which have at least the following beneficial effects compared with the prior art:

The dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in the present application is provided with a protrusion protruding toward the opposite jaw on the first shell body, and a limiting portion is provided on the second shell body. When the first shell body and the second shell body act stably, the mesial surface of the protrusion and the distal surface of the limiting portion form a surface contact, and the surface contact is a mutually parallel plane. Under the design of this contact surface, the protrusion and the limiting portion will not cause local stress concentration and deformation.

The dental correction system in this application realizes the correction of jaw position and orthodontics by designing the tooth alignment correction stage and maintaining or adjusting the sagittal direction of the upper and lower jaws in the jaw reconstruction stage, providing full-process management of jaw adjustment and orthodontics according to different patient conditions to meet different personalized needs.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

FIG1 is a schematic diagram of the structure of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in some embodiments of the present application;

FIG2 is a schematic diagram of the use status of the first shell body and the second shell body in some embodiments of the present application;

FIG3 is a schematic diagram of the structure of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in other embodiments of the present application;

FIG4 is a schematic structural diagram of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in some other embodiments of the present invention;

FIG5 is a schematic diagram of the structure of a protrusion in some embodiments of the present application;

FIG6 is a schematic diagram of the structure of a position limiting portion in some embodiments of the present application;

FIG7 is a schematic diagram of the structure of the protrusion in other embodiments of the present application;

FIG8 is a schematic diagram of the structure of the protrusion in some other embodiments of the present application;

FIG9 is a schematic structural diagram of the first shell-shaped body in other embodiments of the present application;

FIG10 is a schematic structural diagram of the first shell-like body in other embodiments of the present application;

FIG11 is a schematic diagram of the structure of a dental apparatus for adjusting or maintaining the sagittal relationship between the upper and lower jaws in other embodiments of the present application;

FIG12 is a schematic diagram of the structure of the protrusion and the limiting portion in other embodiments of the present application;

FIG13 is a schematic diagram of the structure of a dental correction system in some embodiments of the present application;

FIG14 is a schematic diagram of the structure of a dental correction system in some other embodiments of the present application;

FIG15 is a schematic diagram of the structure of a dental correction system in other embodiments of the present application;

FIG16 is a flow chart of a method for generating a dental instrument in some embodiments of the present application;

FIG. 17 is a schematic diagram of the structure of a graphics processor provided by an embodiment of the present application.

DETAILED DESCRIPTION

To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be limited in any way, and the various embodiments can be combined with each other and referenced to each other without contradiction.

The "posterior tooth area" mentioned in each embodiment of the present application is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 according to the International Dental Federation (Fédération Dentaire Internationale, FDI) marking method, and teeth 1-3 in the anterior tooth area according to the FDI marking method. The teeth in the anterior tooth area include central incisors, lateral incisors and canines. In addition, for the teeth in the deciduous tooth stage, the "posterior tooth area" is defined according to the classification of deciduous teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines and deciduous molars, among which deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars.

The shell-like body is provided with a number of cavities for accommodating multiple teeth, and is divided into lingual surface, labial surface, mesial surface and distal surface. Among them, "lingual surface" is named according to the names of various surfaces of the crown in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36, where the labial surface and buccal surface are the sides of the crown of the front teeth close to the lips, and the sides of the crown of the back teeth close to the cheek are called buccal surfaces. The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively referred to as the lingual surface. The mesial surface and the distal surface are the two surfaces adjacent to the crown of the adjacent teeth, collectively referred to as the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.

In view of the problem in the prior art, that is, in the prior art, when using the Herbst appliance invisible technology, due to the invisible appliance production process, the raised portion and the limit portion will cause local stress concentration and deformation. Referring to Figures 1 to 10, an embodiment of the present application provides a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, by designing a raised portion 11 and a limit portion 21 protruding from the jaw on the buccal side of the appliance, the limit portion 21 drives the mandible to move to the mesial side of the raised portion 11, and maintains the mandible at the mesial side of the raised portion 11 to achieve mandibular protrusion movement or mandibular retention after jaw position adjustment, by The structural improvement of the protrusion 11 and the limiting portion 21 avoids the deformation problem of the orthodontic appliance during use, making the correction result more stable and accurate. The shapes of the protrusion 11 and the limiting portion 21 in each embodiment of the present application are basically the same. The embodiments of the present application are described below in conjunction with the accompanying drawings.

With reference to FIG. 1 and FIG. 2 , some embodiments of the present application provide a dental device, comprising: a first shell-like body 1 for accommodating maxillary teeth and a second shell-like body 2 for accommodating mandibular teeth, wherein the first shell-like body 1 and the second shell-like body 2 are respectively divided into anterior tooth area and posterior tooth area. The buccal side of the posterior tooth area of the first shell-like body 1 is protruded toward the jaw and is provided with a protruding portion 11, and the buccal side of the posterior tooth area of the second shell-like body 2 is protruded toward the jaw and is provided with a limiting portion 21 cooperating with the protruding portion 11; when the first shell-like body 1 and the second shell-like body 2 interact with each other, the mesial surface 111 of the protruding portion 11 contacts the distal surface 211 of the limiting portion 21 to apply a sagittal limiting force to the mandibular teeth; when a stable occlusal state is reached, the protruding portion 11 is located on the distal side of the limiting portion 21 as a whole, forming a locking effect. The mesial side in the present application refers to the side close to the midline of the face, and the distal side refers to the side away from the midline of the face. And the proximal surface 111 of the raised portion 11 and the distal surface 211 of the limiting portion 21 are parallel planes. That is, the proximal surface 111 of the raised portion 11 and the distal surface 211 of the limiting portion 21 are in planar contact. In the prior art, due to the hot pressing film process, the contact surface area of the raised portion 11 and the limiting portion 21 type structure is too small, the contact is a curved surface, and the contact between the curved surfaces is point contact. The stress at the contact point is large, it is easy to deform, and it is not stable enough. In the present application, the raised portion 11 and the limiting portion 21 are in planar contact. This contact method has a large contact area and can effectively avoid the problem of stress concentration. In addition, during the production process, especially in the hot pressing film process, the planar structure is easy to demold, which can ensure the shape integrity of the orthodontic appliance and ensure the correction performance of the orthodontic appliance.

In some embodiments, as shown in reference to FIG3 , the raised portion 11 and the limiting portion 21 are located on the buccal side of the tooth receiving cavity corresponding to the same tooth position of the upper and lower jaws. The advantage of such a design is that when the limiting portion 21 is located on the mesial side of the raised portion 11, the upper and lower jaws can be maintained in the correct position. In some embodiments, the raised portion 11 is located at the tooth receiving cavity 12 where the first shell-like body 1 wraps around tooth No. 6; the limiting portion 21 is located at the tooth receiving cavity 22 where the second shell-like body 2 wraps around tooth No. 6. Since the buccal side area of tooth No. 6 is larger, the buccal side area of the corresponding tooth receiving cavity is also larger. Therefore, the raised portion 11 and the limiting portion 21 are designed in the tooth receiving cavity corresponding to tooth No. 6, and the end of the raised portion 11 and the limiting portion 21 adjacent to the shell-like body can be designed to be larger, so as to ensure the stability of the raised portion 11 and the limiting portion 21 during the interaction process, and prevent unwanted rotation.

In some embodiments, as shown in FIG4 , the first shell-like body 1 is provided with a protrusion 11 on the left and right sides at the same tooth position, and the corresponding second shell-like body 2 is also provided with a limit portion 21 on the left and right sides. Ensure that the left and right sides of the jaw are symmetrically maintained on the horizontal plane along the tooth midline P-P', so as to adjust or maintain the jaw position relationship in the correct position.

In some embodiments, as shown in FIG. 5 , the angle α between the proximal surface 111 of the protrusion 11 and the coronal plane A is between 15° and 20°. The coronal plane is a cross section that cuts the human body longitudinally into two parts, front and back, along the left and right directions. In some embodiments, the angle α between the protrusion 11 and the coronal plane is between 17° and 20°. This angle should not be too small, because if it is too small, it will be close to a right angle, which will easily cause When the upper and lower jaws are closed, they collide and interfere with each other, making it difficult to achieve the correct positioning relationship. If the angle is too large, the protrusion 11 or the limiting portion 21 adjacent to the tip of the opposing jaw is too wide and too large to occupy space, and the locking effect of resisting forward and backward movement will be reduced. Similarly, in some embodiments, as shown in Figure 6, the angle β between the distal surface 211 of the limiting portion 21 and the coronal plane A is also designed to be between 15°-20°. In some embodiments, the angle β between the distal surface 211 of the limiting portion 21 and the coronal plane is between 17°-20°.

In some embodiments, the raised portion 11 is an integral structure with the first shell-like body 1. And, the limiting portion 21 is an integral structure with the second shell-like body 2. In some embodiments, referring to Figures 7 and 8, the raised portion 11 is formed by the buccal side of a tooth receiving cavity in the posterior tooth area of the first shell-like body 1 first protruding toward the distal tooth direction and then toward the opposite jaw, and the width H of the raised portion 11 in the mesiodistal direction gradually decreases from one end adjacent to the first shell-like body 1 to one end adjacent to the second shell-like body 2. The raised portion 11 is connected to the corresponding tooth receiving cavity. Similarly, in some embodiments, the limiting portion 21 is formed by the buccal side of a tooth receiving cavity in the posterior tooth area of the second shell-like body first protruding toward the distal tooth direction and then toward the opposite jaw, and the width of the limiting portion 21 in the mesiodistal direction gradually decreases from one end adjacent to the second shell-like body 2 to one end adjacent to the first shell-like body 1. The limiting portion 21 is connected to the corresponding tooth receiving cavity. The advantage of the design that the width of the limiting portion 21 or the protruding portion 11 in the mesiodistal direction gradually decreases toward the jaw is that, since the limiting portion 21 or the protruding portion 11 is adjacent to the corresponding shell-shaped body as a fixed end, the distal surface 211 of the limiting portion 21 and the mesiodistal surface 111 of the protruding portion 11 are prone to tilt in the mesiodistal direction during the interaction process. The width of the limiting portion 21 or the protruding portion 11 in the mesiodistal direction gradually decreases toward the jaw, which can reduce the bending moment of the free end, thereby improving the anti-bending ability of the protruding portion 11 or the limiting portion 21. This makes the upper and lower jaws more accurately and stably positioned through the dental instrument, and the protruding portion 11 and the limiting portion 21 will not tilt during use.

In some embodiments, as shown in FIG9 , the width of the protrusion 11 in the mesiodistal direction adjacent to one end of the first shell-like body 1 is 70%-90% of the mesiodistal width L of the tooth receiving cavity. The width of the protrusion 11 in the mesiodistal direction adjacent to one end of the first shell-like body 1 is between 9mm-12mm. Similarly, in some embodiments, the mesiodistal width of the limiting portion 21 adjacent to one end of the second shell-like body 2 is 70%-90% of the mesiodistal width of the tooth receiving cavity. The mesiodistal width of the limiting portion 21 adjacent to one end of the second shell-like body 2 is between 9mm-12mm. The advantage of such a design is that there is sufficient continuity between the protrusion 11 and the first shell-like body 1 or the limiting portion 21 and the second shell-like body 2, ensuring that the size of the limiting portion 21 and the size of the protrusion 11 can complete the movement of the mandible. Similarly, the mesiodistal width of the protrusion 11 and the limiting portion 21 should not be too large. If the mesiodistal width is too large, it will easily cause the upper and lower jaws to collide and interfere with each other when closing, making it difficult to achieve a correct seating relationship.

In some embodiments, as shown in FIG. 7 , the length of the protrusion 11 protruding in the distal tooth direction satisfies that after the first shell-like body 1 is worn, the buccal side of the protrusion 11 does not cause buccal muscle tension. The maximum length X of the protrusion 11 protruding in the distal tooth direction is between 6 mm and 12 mm. Similarly, in some embodiments, the length of the limiter 21 protruding in the distal tooth direction satisfies that after the second shell-like body 2 is worn, the buccal side of the limiter 21 does not cause buccal muscle tension. The maximum length X of the protrusion 11 protruding in the distal tooth direction is between 6 mm and 12 mm. The thickness is between 6mm and 12mm. The surface of the protrusion 11 and the limiter 21 adjacent to the buccinator muscle should be kept perpendicular to the horizontal plane. If it is tilted outward, it is easy to get stuck on the inner cheek. If it is tilted inward, the film on the inner surface of the protrusion 11 or the limiter 21 after lamination will be very thin or the shape after lamination will be different from the design.

In some embodiments, the raised portion 11 covers 1/2-2/3 of the buccal side of the tooth at the corresponding position of the opposing jaw, and similarly, the limiting portion 21 covers 1/2-2/3 of the buccal side of the tooth at the corresponding position of the opposing jaw. The raised portion 11 and/or the limiting portion 21 are 0.8mm-1.5mm away from the lowest point of the gingival end edge of the tooth receiving cavity where they are located. The benefit of the raised portion 11 and/or the limiting portion 21 maintaining a gap with the gums is that it ensures that the portion of the raised portion 11 and/or the limiting portion 21 close to the corresponding shell-like body has support capacity after being compressed, and is not easily squeezed and deformed during the interaction process.

In some embodiments, as shown in FIG. 10 , the proximal surface 111 of the protruding portion 11 and/or the distal surface 211 of the limiting portion 21 are provided with a second surface structure 3. The mechanical strength of the second surface structure 3 is greater than the mechanical strength of the protruding portion 11 and/or the limiting portion 21. For example, the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 is provided with a second surface structure 3, and at least one of the stiffness, hardness, and thickness is greater than the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21. The second surface structure 3 can be provided on the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 by bonding or welding. Alternatively, the second surface structure 3 can be covered on the mesial surface 111 of the protruding portion 11 and the distal surface 211 of the limiting portion 21 by a hot pressing film process, and the second surface structure 3 and the mesial surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 are connected by thermal melting. The design of the second surface structure 3 can prevent the protruding portion 11 and the limiting portion 21 from being deformed or reducing the protruding portion 11 and the limiting portion 21, thereby preventing the function of adjusting the upper and lower jaw position from being affected.

In some embodiments, as shown in reference figure 11, the buccal surface of the protrusion 11 and/or the limiting portion 21 is indented inward to form a groove 4 that improves the anti-deformation ability of the protrusion 11 and/or the limiting portion 21. The groove 4 penetrates the protrusion 11 and/or the limiting portion 21 along the gingival and jaw direction. In some embodiments, the groove 4 is a trapezoidal groove or a V-shaped groove, and the width of the trapezoidal groove or the V-shaped groove in the mesiodistal direction gradually decreases from one end of the tooth receiving cavity close to the protrusion 11 and/or the limiting portion 21 to the end adjacent to the jaw. In some embodiments, as shown in reference figure 12, the groove 4 penetrates the protrusion 11 and/or the limiting portion 21 along the gingival and jaw direction so that the connection between the protrusion 11 or the limiting portion 21 and the shell-like body is strengthened. And the groove 4 can be made into a trapezoidal groove or a V-shaped groove, the purpose is to increase the bending section coefficient, that is, the rigidity against bending, so that the protrusion 11 or the limiting portion 21 is not easy to deform.

Specific reference formula: (W is the bending section coefficient, _Iz is the moment of inertia, _ymax is the height from the neutral axis to the cross section, that is, the higher the height of the groove, the greater the bending section coefficient and the greater the rigidity). Therefore, the trapezoidal section coefficient is larger than the V-shaped one. In some embodiments of the present application, the groove 4 can also adopt a trapezoidal groove structure. In addition, the inner sides of the trapezoidal groove can be made into inclined surfaces mainly to facilitate the removal of the orthodontic appliance from the die model. The entire raised portion 11 or the limiting portion 21 is a hollow structure, and the depth of the groove 4 recessed in the direction of the teeth can be designed to be the depth of the raised portion 11 or the limiting portion 21 in the water. The horizontal direction is half of the depth, which enhances the anti-bending ability of the protrusion 11 or the limiting portion 21, while ensuring that the manufacturing process of the first shell-like body 1 and the second shell-like body 2 is simple and feasible, and can be manufactured by large-scale production.

That is to say, in some embodiments, the buccal side surfaces of the protrusion and the limiting portion are provided with a groove structure formed by an inward concave shape. Since the protrusion and the limiting portion in the present application are both cavity structures, the groove structure can increase the bending cross-sectional coefficient of the cavity structure, so that the protrusion and the limiting portion are not prone to mesiodistal deformation or rotation when adjusting the sagittal relationship between the maxillary and mandibular parts, making the correction result more stable and reliable.

In some embodiments of the present application, the protrusion 11 and the first shell-like body 1 or the limiting portion 21 and the second shell-like body 2 are made of the same material, such as polyethylene terephthalate-1,4-cyclohexanedimeth yleneterephthalate (PETG), polycarbonate (PC) or thermoplastic polyurethane (TPU), and can also be other polymers that can be used in the mouth and are safe for use as medical devices. The material makes it safe to wear and produce the effect of correcting teeth at the same time; in other embodiments, the raised portion 11 and the first shell-like body 1 are respectively made of different single materials or different multi-layer composite materials. For example, when the raised portion 11 and the first shell-like body 1 are made of different single materials, they can be any two combinations of PETG, PC or TPU; wherein, different materials can be selected for the raised portion 11 and the first shell-like body 1 during design or preparation, such as the material of the first shell-like body 1 is TPU, and the material of the raised portion 11 can be PETG. At this time, the diaphragm prepared by hot pressing can be made of different materials in some parts, or different materials can be used for local areas during 3D direct printing. When the raised portion 11 is a multilayer composite material different from that of the first shell-like body 1, it can be a multilayer composite material composed of any combination of PETG, PC or TPU. The raised portion 11 can be a multilayer composite material, while the first shell-like body 1 is a single material; the raised portion 11 can also be a single material, while the first shell-like body 1 is a multilayer composite material; or both the raised portion 11 and the first shell-like body can be multilayer composite materials; for example, the raised portion 11 is a multilayer composite material different from that of the first shell-like body 1, such as the first shell-like body 1 is a single-layer structure or a multilayer composite structure, while the raised portion 11 is a multilayer composite material, wherein one layer of the multilayer structure of the raised portion 11 can be the same as that of the first shell-like body 1, or can be different, such as the raised portion 11 is composed of a double-layer composite material, specifically PETG and TPU, and the material of the first shell-like body 1 is PETG; also, the raised portion 11 is composed of a double-layer composite material, specifically PETG and TPU, and the first shell-like body 1 is composed of a double-layer composite material, specifically PETG and PC. The above examples are only some of the preferred embodiments. Various material combinations that can achieve the effects of the present application are within the protection scope of the present application and will not be described in detail here.

Referring to Figure 13, an embodiment of the present application also provides a dental correction system, including: at least one first dental device 100, including a dental device as described in any one of the above, the first dental device 100 includes a first shell-shaped body and a second shell-shaped body, and is a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws; at least one second dental device 200, the second dental device 200 includes a shell-shaped dental appliance for accommodating the upper jaw and a shell-shaped dental appliance for accommodating the lower jaw, and the second dental device 200 is designed to move multiple teeth from an initial position to a target position.

In some embodiments, as shown in FIG. 13 , the dental correction system includes M first dental instruments 100 and N second dental instruments 200. The M first dental instruments 100 correspond to the first correction stage, and the first dental instrument 100 includes a first shell-shaped body with a protrusion and a second shell-shaped body with a limiter. The design of the protrusion and the limiter refers to the design in each embodiment of the present application. In addition, the first correction stage is the sagittal adjustment stage of the upper and lower jaws. The N second dental instruments 200 correspond to the second correction stage, and the second correction stage is the teeth alignment stage. The second correction stage is the subsequent stage of the first correction stage. The M first dental instruments 100 are designed to gradually move the mandible from the initial position to the target position in a step-by-step increment manner, or the M first dental instruments 100 are designed to have the same corresponding mandibular movement amount. This embodiment is aimed at cases that need to adjust the jaw position to the correct position first and then align the teeth. In some embodiments, the tooth layout corresponding to all the first shell-shaped bodies in the M first dental appliances 100 is the same, and the protrusion and the limit portion are designed to gradually move the mandible from the initial position to the final position or reach the final position in one step in a step-by-step manner. The tooth layout corresponding to the first second dental appliance 200 in the N second dental appliances 200 can be the same as the tooth layout corresponding to any one of the M first dental appliances 100. The N second dental appliances 200 corresponding to the second correction stage are designed to arrange the teeth from the initial dentition layout to the target dentition layout in a step-by-step manner.

Or in some embodiments, as shown in reference to FIG. 14 , the dental correction system includes M first dental instruments 300 and N second dental instruments 400. The M first dental instruments 300 correspond to the first correction stage, which is the jaw position adaptation stage, and the M first dental instruments 300 are all provided with a protrusion and a limiter. The N second dental instruments 400 correspond to the second correction stage, which is the teeth alignment and jaw position adjustment stage, and the N second dental instruments 400 are also designed with a protrusion and a limiter. The second correction stage is the subsequent stage of the first correction stage. The advantage of adding the jaw position adaptation stage is that the patient can adapt to the jaw position and can make timely adjustments if there are any problems. If there are any problems with the details, it can be ruled out that they are not caused by tooth movement, so that only the design of the protrusion and the limiter needs to be adjusted.

In some embodiments, as shown in FIG. 15 , the dental correction system includes M first dental appliances 600 and N second dental appliances 500. The N second dental appliances 500 correspond to the first correction stage, and the M first dental appliances 600 correspond to the second correction stage. The second correction stage is the subsequent stage of the first correction stage. The first correction stage is the tooth alignment stage. The M first dental appliances 600 are designed to move the dentition from the initial target to the final target in an incremental manner. The tooth layout corresponding to the last second dental appliance 500 in the first correction stage is the same as the tooth layout corresponding to the first first dental appliance 600 in the second correction stage. The second stage is the maintenance stage. In some embodiments, the first dental appliance 600 can maintain the tooth arrangement to ensure that the teeth can continue to remain in the correct position after orthodontic treatment is completed. In addition, the first dental appliance 600 can also maintain or adjust the jaw position. For example, when maintaining or adjusting the jaw position, the relative position relationship between the upper and lower jaws corresponding to all the dental appliances in the M first dental appliances 600 is consistent, so that the jaw position re-establishes a new occlusal balance state at this position.

Whether the first dental instrument is used as a jaw position maintainer or a jaw position adjuster, it needs to have sufficient mechanical strength to meet the required functions, so the first dental instrument needs to be designed with greater mechanical strength.

For example, in some embodiments, the shell thickness of the M first dental instruments is the same, the shell thickness of the N second dental instruments is the same, and the shell thickness of the first dental instrument is greater than the shell thickness of the second dental instrument. For another example, in some embodiments, the elastic modulus of the M first dental instruments is the same, the elastic modulus of the N second dental instruments is the same, and the elastic modulus of the first dental instrument is greater than the elastic modulus of the second dental instrument.

The embodiments of the present application also provide a method for generating an intermaxillary relationship correction system, as shown in FIG. 16 in some embodiments.

Step 101, obtaining the sagittal positional relationship between the upper and lower jaws in the treatment target position according to the treatment plan; the positional relationship may be the distance between the maxillary anterior teeth and the mandibular anterior teeth in the sagittal direction.

Step 102, determining the first digital dental model and the second digital dental model corresponding to the first shell-like body and the second shell-like body; the first digital dental model is provided with a protruding portion on the buccal side of the posterior tooth area facing the jaw, and the second digital dental model is provided with a limiting portion cooperating with the protruding portion on the buccal side of the posterior tooth area facing the jaw, when the first shell-like body and the second shell-like body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental instrument to reach a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes to each other.

Step 103, manufacturing dental instruments: manufacturing a first shell-like body and a second shell-like body respectively according to the first digital jaw model and the second digital jaw model. Generate a digital model of the first shell-like body and a digital model of the second shell-like body according to the first digital jaw model and the second digital jaw model, and manufacture the first shell-like body and the second shell-like body by additive manufacturing according to the digital model of the first shell-like body and the digital model of the second shell-like body. Additive manufacturing can also be called 3D printing, which integrates computer-aided design, material processing and molding technology, and is based on digital model files. Through software and numerical control systems, special metal materials, non-metallic materials and medical biomaterials are stacked layer by layer in a manner such as extrusion, sintering, melting, photocuring, spraying, etc. to manufacture physical objects.

Step 103 is to manufacture the dental instrument: an additive manufacturing method is used to manufacture a physical model of the first digital jaw model and the second digital jaw model, and a hot pressing method is used to manufacture the first shell body and the second shell body according to the physical model.

It is worth mentioning that all modules involved in the embodiments of the present application are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, the embodiments of the present application do not introduce units that are not closely related to solving the technical problems proposed by the present application, but this does not mean that there are no other units in the embodiments of the present application.

Some embodiments of the present application relate to an electronic device, as shown in FIG17 , including at least one processor 401; and

A memory 402 is communicatively connected to at least one processor 401; wherein,

The memory 402 stores instructions that can be executed by at least one processor 401. The instructions are executed by at least one processor 401 so that the at least one processor 401 can execute a method for generating an inter-jaw relationship correction system.

Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

Some embodiments of the present application also relate to a computer-readable storage medium storing a computer program, which implements the above method embodiments when executed by a processor.

That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed after such combination are all within the scope of protection of this application. In order to save the length of the application text, they will not be repeated here.

The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Similarly, the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (35)

A dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws comprises: a first shell-like body for accommodating the maxillary teeth and a second shell-like body for accommodating the mandibular teeth, the buccal side of the posterior tooth area of the first shell-like body protruding towards the opposite jaw and provided with a protruding portion, the buccal side of the posterior tooth area of the second shell-like body protruding towards the opposite jaw and provided with a limiting portion cooperating with the protruding portion; when the first shell-like body and the second shell-like body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental device to reach a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes. The dental instrument according to claim 1, wherein the angle between the mesial surface of the protrusion and the coronal surface is between 15° and 20°. The dental instrument according to claim 1 or 2, wherein the raised portion is formed by the buccal side of a tooth receiving cavity in the posterior tooth area of the first shell-like body first protruding toward the distal tooth direction and then toward the opposing jaw, and the width of the raised portion in the mesiodistal direction gradually decreases from one end adjacent to the first shell-like body to one end away from the first shell-like body. The dental instrument according to claim 3, wherein the protrusion and the first shell body are an integral structure. The dental instrument according to claim 3, wherein the width of the protrusion in the mesiodistal direction adjacent to one end of the first shell-like body is 70%-90% of the mesiodistal width of the tooth receiving cavity. The dental instrument according to claim 5, wherein the width of the protrusion in the mesiodistal direction adjacent to one end of the first shell-like body is between 9 mm and 12 mm. The dental instrument according to claim 3, wherein the length of the protrusion protruding in the distal tooth direction is sufficient to ensure that the buccal side of the protrusion does not cause buccal muscle tension after the first shell-like body is worn. The dental instrument according to claim 7, wherein the maximum length of the protrusion protruding toward the distal tooth direction is between 6 mm and 12 mm. The dental instrument according to claim 1, wherein the limiting portion is formed by the buccal side of a tooth receiving cavity in the second shell-shaped posterior tooth area first protruding toward the distal tooth direction and then toward the opposing jaw, and the width of the limiting portion in the mesiodistal direction gradually decreases from an end adjacent to the second shell-shaped body to an end away from the second shell-shaped body. The dental instrument according to claim 9, wherein the limiting portion and the second shell-like body are an integral structure. The dental apparatus according to claim 9, wherein the mesiodistal width of the limiting portion adjacent to one end of the second shell-shaped body is 70%-90% of the mesiodistal width of the tooth receiving cavity. The dental instrument according to claim 11, wherein the mesiodistal width of the limiting portion adjacent to one end of the second shell-shaped body is between 9 mm and 12 mm. The dental instrument according to claim 9, wherein the length of the limiting portion protruding in the distal tooth direction is sufficient to ensure that the buccal side surface of the limiting portion does not cause buccal muscle tension after the second shell-shaped body is worn. The dental instrument according to claim 13, wherein the maximum length of the protrusion protruding toward the distal tooth direction is between 6 mm and 12 mm. The dental apparatus according to claim 1, wherein the protrusion and the limiting portion are located in a tooth receiving cavity corresponding to the same tooth position in the upper and lower jaws. The dental instrument according to claim 15, wherein the protrusion is located at the tooth receiving cavity of tooth No. 6 wrapped by the first shell-like body; and the limiting portion is located at the tooth receiving cavity of tooth No. 6 wrapped by the second shell-like body. The dental apparatus according to claim 1, wherein the raised portion covers 1/2-2/3 of the buccal side of the tooth at the corresponding position of the opposing jaw. The dental apparatus according to claim 1, wherein the limiting portion covers 1/2-2/3 of the buccal side of the tooth at the corresponding position of the opposing jaw. The dental instrument according to claim 1, wherein the protrusion and/or the limiting portion is 0.8 mm to 1.5 mm away from the lowest point of the gingival end edge of the tooth receiving cavity where it is located. The dental instrument according to claim 1, wherein the mesial surface of the protruding portion and/or the distal surface of the limiting portion is provided with a second surface structure. The dental instrument according to claim 20, wherein the mechanical strength of the second surface structure is greater than the mechanical strength of the protrusion and/or the limiting portion. The dental instrument according to claim 1, wherein the buccal surface of the protruding portion and/or the limiting portion is recessed inward to form a groove for improving the deformation resistance of the protruding portion and/or the limiting portion. The dental instrument according to claim 22, wherein the groove penetrates the protrusion and/or the limiting portion along the gingival-jaw direction. The dental instrument according to claim 22, wherein the groove is a trapezoidal groove or a V-shaped groove, and the width of the trapezoidal groove or the V-shaped groove in the mesiodistal direction gradually decreases from one end of the tooth receiving cavity close to the raised portion and/or the limiting portion to the end close to the opposing jaw. A method for producing a dental instrument, According to the correction plan, the sagittal position relationship of the upper and lower jaws in the correction target position is obtained; Determine the first digital dental and maxillary models and the second digital dental and maxillary models corresponding to the first shell-like body and the second shell-like body; wherein, the first digital dental and maxillary model is provided with a protruding portion on the buccal side of the posterior teeth area facing the direction of the opposing jaw, and the second digital dental and maxillary model is provided with a limiting portion cooperating with the protruding portion on the buccal side of the posterior teeth area facing the direction of the opposing jaw, and when the first shell-like body and the second shell-like body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental instrument to reach a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes to each other; Manufacturing the dental instrument: manufacturing the first shell-shaped body and the second shell-shaped body according to the first digital jaw model and the second digital jaw model respectively. According to the method for generating a dental instrument according to claim 25, the manufacturing of the dental instrument comprises: manufacturing a solid model of the first digital dental model and the second digital dental model by additive manufacturing, and manufacturing the first shell-shaped body and the second shell-shaped body by hot pressing film according to the solid model. According to the method for generating a dental instrument according to claim 25, the manufacturing of the dental instrument comprises: generating a digital model of the first shell-like body and a digital model of the second shell-like body according to the first digital jaw model and the second digital jaw model, and manufacturing the first shell-like body and the second shell-like body by additive manufacturing according to the digital model of the first shell-like body and the digital model of the second shell-like body. A dental correction system, comprising: at least one first dental appliance, including the dental appliance as described in any one of claims 1 to 24, which is a dental appliance for adjusting or maintaining the sagittal relationship between the upper and lower jaws; and at least one second dental appliance, wherein the second dental appliance comprises a shell-shaped dental appliance for accommodating the upper jaw and a shell-shaped dental appliance for accommodating the lower jaw, and the second dental appliance is designed to move multiple teeth from an initial position to a target position. The dental correction system according to claim 28, wherein the M first dental appliances correspond to a first correction stage, the N second dental appliances correspond to a second correction stage, and the second correction stage is a subsequent stage of the first correction stage. The dental orthodontic system according to claim 29, wherein the M first dental instruments are designed to gradually move the mandible from an initial position to a target position in a step-by-step manner. The dental correction system according to claim 28, wherein N of the second dental appliances correspond to a first correction stage, M of the first dental appliances correspond to a second correction stage, the second correction stage is a subsequent stage of the first correction stage, and the tooth layout corresponding to the last of the second dental appliances in the first correction stage is the same as the tooth layout corresponding to the first of the first dental appliances in the second correction stage. The dental correction system according to claim 28, wherein the shell thicknesses of the M first dental instruments are the same, the shell thicknesses of the N second dental instruments are the same, and the shell thickness of the first dental instrument is greater than the shell thickness of the second dental instrument. The dental correction system according to claim 28, wherein the M first dental appliances have the same elastic modulus, the N second dental appliances have the same elastic modulus, and the elastic modulus of the first dental appliance is greater than the elastic modulus of the second dental appliance. An electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor so that the at least one processor can execute a method for generating a dental instrument as described in any one of claims 25-27. A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the method for generating a dental instrument according to any one of claims 25 to 27 is implemented.