WO2024186021A1 - Blank for manufacturing dental prosthesis - Google Patents

Abstract

The present invention comprises: a material unit providing a predetermined machining area which is placed in direct contact with a machining tool of a machining device, and having multiple sides; insertion members formed on side edges of the material unit and having a thickness smaller than the thickness of the material unit; and guard portions that are mounted via the insertion members onto sides of the material unit and may be in direct contact with a jig of the machining device, the jig having a circular frame form.

Description

Blanks for making dental prosthetics

The present invention relates to a blank used for manufacturing a dental prosthesis, and more specifically, to a blank for manufacturing a dental prosthesis configured to maintain processing precision by firmly contacting a jig of a processing device, while preventing cracks or breakage from tool stress, vibration, impact, etc. generated during the processing.

When a tooth is lost due to fracture, damage from caries, or defect, dental restorative or prosthodontic treatment is performed. Dental prosthodontic treatment refers to all procedures that remove part or all of a tooth and then artificially create or attach a tooth that is most similar to a natural tooth.

Dental prosthetics can be made by reproducing the shape of a patient's teeth on an impression and pouring plaster into it to reproduce the shape of the teeth, or by acquiring the shape of the oral cavity and teeth through an intraoral scanning process, and then designing the desired teeth on the screen through a CAD design process based on this, and then processing them using an automated CAD/CAM processing device.

It is important that the blank used to manufacture a dental prosthesis be firmly fixed to the jig of the processing device because it is subject to pressure from a processing tool (bit) that rotates and moves at high speed. If the blank moves due to the force generated from the processing tool, there is a problem in that it cannot be processed into a prosthesis of the set shape.

Conventional blanks, especially large-area blanks designed to be able to manufacture multiple prosthetics from a single blank, have a circular or elliptical shape when viewed from a plane, and are thus placed in surface contact with the jig of the processing device. That is, the entire upper edge of the conventional blank is in surface contact with the bottom surface of an upper jig made of a circular mold, and the entire bottom edge of the conventional blank is in surface contact with the top surface of a lower jig made of a circular mold.

As described above, since the existing blank has a configuration in which the entire upper and lower edges are in surface contact with a jig having a circular frame, it can be placed in a fixed position without flowing due to high-speed rotational force generated from a machining tool or vertical machining pressure.

However, since the existing blank has a configuration in which the entire upper edge and the entire lower edge are in direct contact with the upper jig and the lower jig, respectively, there is a problem in that the processing area by the processing tool is reduced, and in particular, there is a serious problem in that cracks occur due to the instantaneous rotational force and pressure of the processing tool, resulting in damage.

Meanwhile, in the case of large-area blanks, since multiple prostheses are intermittently or sequentially manufactured from one blank depending on the time required to manufacture the prosthesis, repetitive clamping in the processing device is inevitable, and the problem of the blank being broken due to such repetitive clamping may occur.

Accordingly, the applicant of the present invention has proposed the present invention in order to solve the above-mentioned problems, and a prior art document related thereto is Korean Patent No. 10-1997032 entitled 'Processing table assembly for processing dental restoration material and method for processing dental restoration material using the same'.

The present invention is intended to solve the above problems, and aims to provide a blank for manufacturing a dental prosthesis configured to prevent flow due to external force even when the machining area of a material portion that comes into direct contact with a machining tool is not in contact with a jig of a machining device.

In addition, the present invention aims to provide a blank for manufacturing a dental prosthesis configured to minimize dead space by manufacturing a material portion that comes into direct contact with a processing tool in a polygonal shape, and further to increase the production efficiency of the dental prosthesis.

In addition, the present invention aims to provide a blank for manufacturing a dental prosthesis that can prevent fracture even when exposed to repetitive clamping by a machining device in a milling process for manufacturing a dental prosthesis.

The present invention may include: a material portion that provides a predetermined processing area that is in direct contact with a processing tool of a processing device and forms a plurality of side surfaces; an insertion member that is formed at an edge of the material portion and has a thickness smaller than a thickness of the material portion; and a guard portion that is mounted on a side surface of the material portion using the insertion member and is in direct contact with a jig having a circular frame shape of the processing device.

In addition, the insert member can be formed by cutting the upper surface and the lower surface of the corner of the material portion.

Additionally, a gap may be formed between the side surface of the material portion and the jig of the processing device.

In addition, the guard part can form a fixing groove on the inner surface into which the insertion member is inserted.

In addition, it may include a first contact surface that is positioned at the upper and lower portions based on the above-mentioned anchoring groove and makes surface contact with a side surface of the material portion; and a second contact surface that is formed to extend horizontally from the upper or lower portion of the first contact surface and makes surface contact with the lower or upper surface of the jig having a circular frame shape.

In addition, the insert member, the fixing groove into which the insert member is inserted, the first contact surface, and the second contact surface may have a curvature corresponding to the curvature of the jig having a circular frame shape.

Additionally, the thickness of the guard portion may be equal to or smaller than the thickness of the material portion.

In addition, when the guard portion is smaller than the thickness of the material portion, and the jig having a circular frame shape is placed on the second contact surface, the inner surface of the jig can come into surface contact with the side surface of the material portion that is not in contact with the first contact surface.

The blank for manufacturing a dental prosthesis according to the present invention provides a guard portion that can stably fix the material portion on a jig even when the machining area (upper surface) of the material portion is not in contact with the jig of the machining device, thereby preventing the machining range of the machining tool from interfering with the jig, thereby enabling the machining area of the material portion to be fully utilized, and minimizing the dead space of the material portion to also increase the production efficiency of the dental prosthesis.

In addition, the blank for manufacturing a dental prosthesis according to the present invention provides a structure in which an insertion member formed on a side of a material portion and a fixing groove of a guard portion are mutually coupled, thereby increasing the contact area between the material portion and the guard portion, thereby further preventing the detachment of the guard portion due to external force.

In addition, the blank for manufacturing a dental prosthesis according to the present invention provides a structure that disperses to the outside the momentary stress generated at the contact area when the machining tool first comes into contact with the machining area of the material portion, so that the material portion can be prevented from being damaged or cracked in advance due to the pressure generated from the machining tool or jig.

In addition, the blank for manufacturing a dental prosthesis according to the present invention has a guard portion, so that the relevant portion can be clamped and a milling process into a prosthesis can be repeatedly performed, thereby preventing breakage due to repeated clamping.

Figure 1 is a perspective view of a blank according to one embodiment of the present invention.

Figure 2 is a plan view of the blank shown in Figure 1.

Figure 3 is a perspective view showing a state in which the guard portion is separated from the material portion of the blank illustrated in Figure 1.

Figure 4 is a plan view of a material portion according to one embodiment of the present invention.

Figure 5 is a front view of the material portion shown in Figure 4.

Figure 6 is a perspective view of a guard portion according to one embodiment of the present invention.

FIG. 7 is a side view showing a circular jig mounted on a guard portion of a blank according to one embodiment of the present invention.

The advantages and features of the present invention and the methods for achieving them will become apparent with reference to the embodiments described in detail below together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and these embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person skilled in the art to which the present invention belongs of the scope of the invention, and the present invention is defined only by the scope of the claims.

Hereinafter, a blank for manufacturing a dental prosthesis according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. In describing the present invention, specific descriptions of related known functions or configurations are omitted in order to avoid obscuring the gist of the invention.

FIG. 1 is a perspective view of a blank according to an embodiment of the present invention, FIG. 2 is a plan view of the blank illustrated in FIG. 1, FIG. 3 is a perspective view showing a state in which a guard portion is separated from a material portion of the blank illustrated in FIG. 1, FIG. 4 is a plan view of the material portion according to an embodiment of the present invention, FIG. 5 is a front view of the material portion illustrated in FIG. 4, FIG. 6 is a perspective view of a guard portion according to an embodiment of the present invention, and FIG. 7 is a side view showing a state in which a circular frame-shaped jig is mounted on the guard portion of the blank according to an embodiment of the present invention.

First, the blank for manufacturing a dental prosthesis according to the present invention is characterized in that it is configured to prevent the material part used for manufacturing the prosthesis from flowing due to external force even when it is not in contact with a jig of a processing device, and further, prevent cracks from occurring due to high-speed rotational force or vertical pressure generated from a processing tool.

The blank (100) for manufacturing the above dental prosthesis may include a material portion (200), an insertion member (300), and a guard portion (400), as shown in FIGS. 1 to 3.

First, the material part (200) can be placed on a circular jig (J1, J2, see Figure 7) that constitutes an artificial tooth processing device.

The processing device can be driven based on, for example, CAD (computer-aided design)/CAM (computer-aided manufacturing) data, and can process the material portion (200) by grinding, milling, cutting, or the like using a processing tool.

The above material portion (200) provides a predetermined processing area that comes into direct contact with the processing tool of the processing device.

For reference, the material portion (200) may be composed of at least one of glass or glass-ceramic, polymer infiltrated glass, composite resin or hybrid material, unsintered or a partially sintered or a densely-sintered ceramic, metal or metal alloy. In addition, the material portion (200) has characteristics such as high strength, thermal stability and high corrosion resistance, and may be used alone in white or colored form, or may be used in combination with white and colored form.

In addition, the material portion (200) may have a polygonal shape with multiple side faces when viewed on a plane, as illustrated in FIG. 4.

For example, the material portion (200) may be manufactured as a polygon, such as a hexagon, an octagon, a dodecagon, a hexagon, or a hexagon. In one embodiment of the present invention, the material portion (200) is described and illustrated in the drawings as having a substantially hexagonal planar shape, and accordingly, six sides (in the description above and below, the surface of the blank including the 'sides' is defined as a 'side') are formed substantially around the perimeter. In addition, the vertex portion where two of the six side surfaces (210) meet each other may be round-processed to have a curvature corresponding to the curvature of the jig (J1, J2) having a circular frame shape. In other words, the vertex portion of the material portion (200) having a hexagonal planar shape may be round-processed to have a curvature corresponding to the curvature of the jig (J1, J2), as illustrated in FIG. 4, to form a side surface having a curved shape, and this side surface may be referred to as the insert member (300) described below.

In one embodiment of the present invention, the insertion member (300) of the material portion (200) having a curved shape when viewed from a plane is illustrated in the drawing as being formed in a plurality at a set interval along the circumferential direction of the material portion (200).

In addition, the insert member (300) is formed at an edge where the side surfaces of the material portion (200) meet each other, as described above, and may have a thickness smaller than the thickness of the material portion (200), as shown in FIGS. 1 to 5.

In addition, the insert member (300) can be formed by cutting the upper surface and the lower surface of the corner side of the material part (200), as shown in FIGS. 4 and 5.

An insert member (300) having the above configuration can be inserted into a mounting groove (410) of a guard member (400) to be described later.

The above guard part (400) is a component that comes into direct contact with a jig (ji, J2) having a circular frame shape, and serves to prevent the material part (200) from flowing due to external force while the material part (200) is being processed by a processing tool.

The guard part (400) serves to protect the material part (200) from stress, impact, etc. transmitted from a processing device or a processing tool, and in particular, serves to support the material part (200) on the jig (J1, J2) by directly contacting the jig (ji, J2) having a circular frame shape. In addition, the guard part (400) may be manufactured from a material different from the material part (200). For example, it may be manufactured from a plastic material or a metal material.

In addition, a plurality of guard members (400) may be provided on the material member (200) at predetermined intervals along the circumferential direction of the material member (200).

Meanwhile, the guard part (400) can form a fixing groove (410) on the inner surface into which the insertion member (300) is inserted, as shown in FIG. 6.

The above-mentioned fixing groove (410) can be formed in the guard part (400) in a shape corresponding to the insertion member (300).

In addition, the guard part (400) may include a first contact surface (420) that is positioned at the upper and lower portions of the fixing groove (410), respectively, and makes surface contact with the side surface of the material part (200); and a second contact surface (430) that is formed to extend horizontally from the upper or lower portion of the first contact surface (420) and makes surface contact with the lower or upper surface of the jig (J1, J2) that has a circular frame shape.

The first contact surface (420) can be in surface contact with the side surface of the material portion (200) that has been cut to form the anchoring groove (410).

The second contact surface (422) is formed to extend horizontally from the top or bottom of the first contact surface (421) and can be in surface contact with the bottom or top surface of a jig (J1, J2) having a circular frame shape.

Meanwhile, the guard part (400) may have a curvature corresponding to that of the insert member (300). That is, the fixing groove (410) and the first contact surface (420) and the second contact surface (430) of the guard part (400) may have a curvature corresponding to that of the insert member (300).

Accordingly, the insertion member (300) and the fixing groove (410), first contact surface (420) and second contact surface (430) of the guard part (400) may have a curvature corresponding to the curvature of the jig (JI, J2) having a circular frame shape.

And, the guard part (400) may have a thickness equal to or smaller than that of the material part (200). In one embodiment of the present invention, the guard part (400) is depicted in the drawing as having a thickness smaller than that of the material part (200).

When the guard part (400) is smaller than the thickness of the material part (200), and the jig (J1, J2) having a circular frame shape is placed on the second contact surface (430), the inner surface of the jig (J1, J2) can come into surface contact with the side surface of the material part (200) that is not in contact with the first contact surface (420).

Specifically, the inner surface of the jig (J1, J2) can be in surface contact with the side surface of the material portion (200) exposed to the space (S) illustrated in FIG. 7, and the side surface of the material portion (200) can be said to be a surface portion of the material portion (200) that does not come into contact with the first contact surface (420) of the guard portion (400).

Since the second contact surface (430) of the guard portion (400) constituting the blank (100) is in surface contact with the lower or upper surface of the jig (J1, J2), and furthermore, the side surface of the material portion (200) is in surface contact with the inner surface of the jig (J1, J2), the flow of the material portion (200) due to an external force can be suppressed.

In addition, since the processing area (upper surface) of the material portion (200) has a configuration that does not come into contact with the jig (J1, J2), the processing area (upper surface) of the material portion (200) for manufacturing a dental prosthesis can be fully utilized, thereby reducing waste of the material portion (200).

In addition, since the material portion (200) has a polygonal shape forming a plurality of side surfaces, a separation space is formed between the side surfaces of the material portion (210) and the inner surface of the jig (J1, J2) having a circular frame shape when viewed from a planar view. Accordingly, when the machining tool first comes into contact with the machining area of the material portion (200), the momentary stress generated at the contact area can be dispersed to the outside through the separation space, so that the phenomenon of cracks occurring in the material portion (200) can be prevented.

For reference, the guard member (400) may be fixedly mounted to the insert member (300) of the material member (200) using a known bonding material, or may be mounted to the insert member (300) of the material member (200) using a fastening means such as a screw.

Although specific embodiments of the present invention have been described so far, it is obvious that various modifications are possible within the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the claims below but also by equivalents of the claims.

The present invention can be applied and sold in the medical industry.

Claims (8)

A material portion that provides a predetermined machining area that comes into direct contact with a machining tool of a machining device and forms a plurality of side surfaces; An insert member formed at a corner of the above material portion and having a thickness smaller than the thickness of the above material portion; and A blank for manufacturing a dental prosthesis, characterized by including a guard portion that is mounted on the side of the material portion using the insert portion and comes into direct contact with a jig having a circular frame shape of a processing device. In paragraph 1, The above insertion member is, A blank for manufacturing a dental prosthesis, characterized in that it is formed by cutting the upper surface and the lower surface of the corner side of the above-mentioned material portion. In the second paragraph, A blank for manufacturing a dental prosthesis, characterized in that a gap space is formed between the side surface of the material portion and the jig of the processing device. In the third paragraph, The above guard part, A blank for manufacturing a dental prosthesis, characterized in that a fixing groove into which the insertion member is inserted is formed on the inner surface. In paragraph 4, A first contact surface, which is positioned above and below the above-mentioned anchoring groove and makes surface contact with the side surface of the above-mentioned material portion; and A blank for manufacturing a dental prosthesis, characterized by including a second contact surface that extends horizontally from the upper or lower portion of the first contact surface and makes surface contact with the lower or upper surface of the jig having a circular frame shape. In paragraph 5, A blank for manufacturing a dental prosthesis, characterized in that the insertion member, the fixing groove into which the insertion member is inserted, the first contact surface and the second contact surface have a curvature corresponding to the curvature of the jig having a circular frame shape. In paragraph 5, A blank for manufacturing a dental prosthesis, characterized in that the thickness of the guard portion is equal to or smaller than the thickness of the material portion. In paragraph 7, A blank for manufacturing a dental prosthesis, characterized in that when the guard portion is smaller than the thickness of the material portion and the jig having a circular frame shape is placed on the second contact surface, the inner circumferential surface of the jig comes into surface contact with the side surface of the material portion that is not in contact with the first contact surface.

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