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WO2025106148A1 - Positionnements de correcteur à encliquetage et de points d'ancrage pour traitements par aligneur orthodontique - Google Patents

Positionnements de correcteur à encliquetage et de points d'ancrage pour traitements par aligneur orthodontique Download PDF

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Publication number
WO2025106148A1
WO2025106148A1 PCT/US2024/046472 US2024046472W WO2025106148A1 WO 2025106148 A1 WO2025106148 A1 WO 2025106148A1 US 2024046472 W US2024046472 W US 2024046472W WO 2025106148 A1 WO2025106148 A1 WO 2025106148A1
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WIPO (PCT)
Prior art keywords
teeth
spring
socket connector
corrector
bracket
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Pending
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PCT/US2024/046472
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English (en)
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Mohammad Izadi
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Individual
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Individual
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/082—Positioning or guiding, e.g. of drills
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/36—Devices acting between upper and lower teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0062—Catch or snap type connection

Definitions

  • the ball diameter ranges from 1-3 mm. In at least some embodiments, the ball diameter ranges from 1.25 mm to 2.5 mm.
  • the diameter of the opening of socket connector 102/110 ranges from 0-0.3 mm smaller than the ball diameter. In at least one embodiment, the socket connector opening is 0.2 mm smaller in diameter than the ball diameter.
  • FIG. 1(a) shows an example of lower jaw and/or teeth 114, sitting more forward compared to upper jaw and/or teeth 112, which can be corrected by orthodontic device 100.
  • Arrows a and b in FIG. 1(a) show directions of movement needed for upper jaw and/or teeth 112 and lower jaw and/or teeth 114, respectively, in order to correct the Class III skeletal and dental issues, according to at least one embodiment of the present invention.
  • FIG. 1(b) shows an example of orthodontic device 100 in use for correcting the Class III skeletal and dental issues of FIG. 1(a), according to at least one embodiment of the present invention.
  • first socket connector 102 of orthodontic device 100 is mounted on an orthodontic mount (also referred to as a band) on an upper molar or upper teeth 112 of a patient.
  • second socket connector 1 10 of orthodontic device 100 is connected with an orthodontic bracket on a bicuspid mount 116 on lower teeth 114.
  • the bracket on mount 116 includes a split bracket enabling the use of orthodontic wire 118 at the same time.
  • the correction of skeletal and dental issues can be performed by an orthodontic device 200 shown in FIGs. 2(a) and 2(b), which will be explained hereinafter.
  • spring 104 is a compression spring.
  • spring 104 is a tension spring.
  • FIG. 2(a) and 2(b) are views of an orthodontic device 200, according to at least one embodiment of the present invention.
  • orthodontic device 200 is similar to orthodontic device 100 shown in FIG. 1(b).
  • Orthodontic device 200 includes a first socket connector 202 (similar to first socket connector 102), a spring 204, a threaded portion 206, a push/pull rod 208, and a second socket connector 210 (similar to second socket connector 110).
  • spring 204 is connected to first socket connector 202 at one end and is connected to second socket connector 210 of push/pull rod 208 through threaded portion 206 at an opposite end.
  • spring 204 and push/pull rod 208 are assembled to be a variable tension push/pull rod.
  • the variable tension push/pull rod has a two-piece construction.
  • FIG. 2(a) is a view of orthodontic device 200 before connecting push/pull rod 208 to spring 204, according to at least one embodiment of the present invention.
  • FIG. 2(b) is a view of orthodontic device 200 after connecting push/pull rod 208 to spring 204, according to at least one embodiment of the present invention.
  • First socket connector 202 is configured to connect spring 204 to an orthodontic mount (also referred to as a band) on an upper molar of a patient.
  • first socket connector 202 is a socket connector as described above.
  • first socket connector 202 is connected to an end of an elongated spring.
  • first socket connector 202 is configured to snap onto a ball on the orthodontic mount.
  • first socket connector 202 is configured to snap onto a button on the orthodontic mount. In at least some embodiments, due to a bias of tension by pressing the first socket connector 202 onto the ball, the first socket connector 202 is securely retained from slipping off the ball.
  • first socket connector 202 snap locks gently onto the button. In at least some embodiments, first socket connector 202 need not lock very tightly because the patient or a parent should be able to remove the connector and there is a natural pull force in a direction transverse the installation/removal direction on the connector once in position, so the connector will stay in place.
  • Spring 204 is configured to connect first socket connector 202 and second socket connector 210 at two opposite ends of spring 204, respectively.
  • spring 204 is an elongated spring with a threaded portion at one end.
  • spring 204 includes a portion at one end configured to engage with a threaded portion being inserted therein, e.g., a threaded portion of push/pull rod 208 described below.
  • spring 204 may have various sizes.
  • spring 204 in a Class III correction application (for example, as shown in FIG. 6), spring 204 is shorter in length.
  • spring 204 is longer in length.
  • spring 204 has a larger or smaller amount of elastic force to assist with pushing or pulling tension.
  • a size of compression spring 204 is generally about 23 mm, for Class II (ForsusTM-like) correction.
  • compression spring 204 after activation, compression spring 204 should not exert more than about 4-6 oz of pressure in either case.
  • at least one benefit of orthodontic device 200 is that the device is easily adjusted to create the forces needed by threading in and out of the push/pull rod 208. In Class III correction, there is a possibility that the span might be longer due to the longer lower jaw size.
  • compression spring 204 in case of Class II is kept a bit longer so it becomes active when the patient closes the mouth.
  • the tension spring in Class III correction must be a bit shorter than the compression spring in Class II correction, in order to create a pulling action as soon as it is installed.
  • a spring that can act both as a compression (pushing away) and a tension spring (pulling together) is contemplated.
  • compression/tension spring 204 is in one of at least three sizes of 23 mm, 25 mm, or 27 mm, which give the operator flexibility. In at least some embodiments, longer or shorter lengths of spring 204 arc usable.
  • Threaded portion 206 is configured to connect spring 204 with push/pull rod 208.
  • orthodontic device 200 is a metallic two-piece construction having elongated spring 204 with threaded portion 206 at one end, and push/pull rod 208 with a correspondingly threaded portion to fit into threaded portion 206 of spring 204.
  • the opposite end of elongated spring 204 from the threaded portion has first socket connector 202 connected thereto.
  • the opposite end of threaded push/pull rod 208 from the threaded portion has second socket connector 210 connected thereto.
  • threaded portion 206 is a screw hole, and push/pull rod 208 is screwed in the screw hole.
  • Push/pull rod 208 is configured to have a threaded end connected to spring 204 through threaded portion 206 and a second socket connector located at another end connected with a ball on a bicuspid mount 116 on lower teeth 114.
  • push/pull rod 208 is threaded on one end which is configured to be threaded into spring 204, and the other end of push/pull rod 208 has second socket connector 210.
  • push/pull rod 208 is a threaded rod with a correspondingly threaded portion to fit into the spring threaded portion.
  • Push/pull rod 208 is adjustable and is also referred to as pull/push rod 208.
  • Pull/push rod 208 can be screwed in or out of the spring 204 for different kinds of activation, as needed. If pull/push rod 208 is turned counterclockwise, the rod unscrews and gets longer; and with a clockwise rotation, the rod gets shorter. In at least some embodiments, the threading on pull/push rod 208 is reverse. Each complete turn has a pitch ranging from .05 mm to 1 mm. Because this will be removable and we do not want the activation to get lost by accidentally being able to turn pull/push rod 208 easily, in an embodiment rod 208 includes measurement markings along the length.
  • the markings are laser etched along rod 208. This can be indicated in millimeters on the pull/push rods.
  • rod 208 is configured to click to stabilize with each complete turn, or has enough friction so the rod will not turn with ease. Therefore, when we activate, we can instruct the patient that the pull/push rod 208 is on a particular activation level (3 mm, 5 mm, or the like%) so if they accidentally turn the rod, the patient knows at what activation level rod 208 needs to be set. This is applicable for both braces and aligner designs to keep it simple.
  • the threaded part of the pull/push rod is the same size as within the compressed spring to prevent the spring from bulging out to the patient’s cheek, when the spring is fully compressed.
  • the rod need not be as long as in a Class II embodiment due to the pulling action in the Class III embodiment.
  • the arm and the push/pull rods are made in tooth color or clear strong and rigid acrylic (safe for dental) materials, and (in an embodiment) only keep the spring in stainless (if need be for efficacy) or even white color springs. We want them to look incognito and actually they will be, because they attach from the upper molars to the lower cuspid area, and they get covered with the cheeks very nicely. Also, they will be lighter in weight and stay mouth-friendlier.
  • the spring 204 size generally is about 23 mm, for Class II (Forsus-like) correction and after activation the spring 204 should not exert more than about 4-6 oz of pressure in either case, in some embodiments.
  • At least one benefit of an embodiment of this device is that it is easily adjusted to create the forces needed by threading in and out.
  • the span might be longer due to the longer lower jaw size, so keeping the spring of about the same size (in such a way that the spring 204 is made to have both pulling and pushing capabilities) is contemplated to work as well.
  • Having fully compressed springs in five sizes of 18 mm, 22 mm, 25 mm, or 29 mm or 32 mm gives the operator flexibility. In some embodiments, longer or shorter spring 204 lengths are usable.
  • a total push/pull rod of about 30 mm in length with the threaded portion of about 6-8 mm again will be sufficient to create a pull (threaded in to make shorter) or push (threaded out to make longer) action.
  • the spring 204 size is always the same as about 23 mm, and we have different size rods to be able to activate initially. An issue that arises in other approaches is if the patient opens the mouth wide, the rod and the spring sometimes may separate due to its design and can potentially hurt the patient. In at least one embodiment of the present invention, the spring 204 can never be separated from the push/pull rod no matter how wide the patient opens, because the two pieces are screwed together.
  • the first socket connector is attached to a ball on an upper molar of the patient.
  • the threaded rod 208 is threaded into the spring 204 to a first distance or depth. In at least one embodiment, the first distance is two millimeters.
  • the second socket connector is attached to a ball on a mount on a lower tooth of the patient.
  • the length of the variable tension push/pull rod when the spring 204 is not under tension and the threaded rod is attached is less than the distance from the upper molar attachment point to the lower mount on the teeth.
  • the threaded rod 208 is turned to be threaded into the spring 204 while leaving an additional four millimeters (4 mm) of threading available on the threaded rod 208.
  • the spring 204 when attaching the second socket connector to mount on the lower tooth, the spring 204 is put under tension and stays active (under tension) at all times.
  • the tension in the push/pull rod 208 results in even a more but yet gentle pulling motion (back into the patient’s mouth) on the lower teeth and a pushing motion (out of the patient’s mouth) on the upper teeth.
  • the additional threading is about 6 mm instead of 4 mm.
  • a goal of the additional threading is to impart a range of tension from about 6 ounces to about 8 ounces of force.
  • each complete rotation of the threaded rod 208 into the spring adjusts the tension force by 2 ounces of forces due to shortening the span of the device.
  • the second socket connector is easily disconnected from ball on the mount on the lower tooth, and the threaded rod 208 is turned in clockwise to be threaded further into the spring 204.
  • the threading in the rod 208 and spring 204 is such that the threaded rod 208 is turned counter-clockwise to be threaded further into the spring 204.
  • the overall length of the variable tension rod 208 is thereby reduced.
  • the threaded rod 208 is turned each time to reduce the overall length by one millimeter. In some embodiments, each turn of the threaded rod 208 reduces the overall length by more or less than one millimeter.
  • the second socket connector is then reattached to the same ball on the lower tooth mount thereby putting the spring 204 into tension and continuing to pull on the lower teeth and push on the upper teeth. The process is then repeated.
  • the doctor is able to vary the amount of force being applied to the movement of the teeth by greater or lesser threading of the threaded rod 208 into the spring 204.
  • repositioning of the attachment is simplified using the second socket connector.
  • Current approaches using a Forsus appliance require the crimping of wire ends in the mouth of the patient which is uncomfortable, awkward, time consuming, and with the possibility of harm to the patient.
  • the socket connector (first or second) is easily removed from the respective ball on a tooth mount, i.e., the socket connector is popped off the ball.
  • the device is used in a push manner to create separation. That is, the tension spring 204 part provides elastic force to push the upper first socket connector away from the lower second socket connector. In this manner, the upper teeth are pushed toward the back of the patient mouth and the lower teeth are pushed toward the front of the mouth. Adjustments to the threaded part cause the threaded part to be removed from the tension spring 204 rather than inserted deeper.
  • at least a portion of the push/pull rod 208 near the second socket connector is angled to minimize the rod from flipping out into the patient’s cheek.
  • the tension spring 204 has a different size.
  • the spring 204 is shorter in length. In a Class II correction application, the tension spring 204 is longer in length. In other embodiments, the tension spring 204 has a larger or smaller amount of elastic force to assist with pushing or pulling tension.
  • a total length of push/pull rod 208 is about 30 mm with the threaded portion of about 6-8 mm, which will be sufficient to create a pull (threaded in to make the total length of pull rod 208 and tension spring 204 shorter) or push (threaded out to make the total length of push/pull rod 208 and tension spring 204 longer) action.
  • the size of tension spring 204 is always the same as about 23 mm, and push/pull rod 208 has different sizes to be able to activate initially.
  • tension spring 204 will not be separated with push/pull rod 208, no matter how wide the patient’s mouth opens, because tension spring 204 and push/pull rod 208 are screwed together through threaded portion 206.
  • Second socket connector 210 is configured to connect push/pull rod 208 to a ball on a mount 116 on a lower tooth 114 of a patient.
  • second socket connector 210 is connected at one end of push/pull rod 208.
  • second socket connector 210 is connected to an end of a threaded rod 208.
  • second socket connector 210 is at one end of push/pull rod 208 opposite to the other end of the push/pull rod 208 where first socket connector 202 is located.
  • second socket connector 210 is hingedly or rotationally crimped at the end of push/pull rod 208. The socket connector enables quick and easy release of second locking module 210 and push/pull rod 208 from the ball.
  • second socket connector 210 can then be repositioned on a different mount on a different lower tooth 114 of the patient.
  • arrows c and d show a direction of movement needed for push/pull rod 208 to be threaded into spring 204.
  • Arrow e shows a direction of rotation that push/pull rod 208 is turned to be threaded into the spring.
  • the threading in push/pull rod 208 and spring 204 is such that the threaded push/pull rod 208 is turned to be threaded further into the spring, and an overall length of push/pull rod 208 and spring 204 is thereby reduced.
  • Orthodontic device 200 is able to correct both Class II and Class III conditions depending on how the device is adjusted, i.e., whether to keep the spring under pulling tension by shortening the span of the device or to make the spring active (pushing) by lengthening the span of the device.
  • the spring is kept under pulling tension by screwing the pull/push rod clockwise to shorten the span of the assembly, thereby creating a pulling action to correct the Class III malocclusion when the spring is pulled to connect the socket connector on the ball mount on the band.
  • FIG. 2 is a side view of an aligner having a button attached for connection with a socket connector.
  • FIG. 3 is another view of a socket connector as described.
  • FIG. 4 is a side section view of a socket connector snapped on a ball or button. If the diameter of the socket of the socket connector is smaller than the ball or button diameter by about 0.2 mm, the ball or button snaps into the socket with pressure or a Bansbach spring style socket to secure the ball in the socket.
  • buttons are placed on the upper molar (six year or twelve year molars as best fit) and lower cuspid regions of the aligners (FIG. 1). So, the placement vicinity of the corrector will be very similar to the corrector usage with the braces as described below.
  • the distance between the molar button to the cuspid button is measured with a ruler when the patient's teeth are closed together completely to see what size of a corrector is needed.
  • there are 5 different sizes of fully compressed correctors including 18 mm, 22 mm, 25 mm, 29 mm, and 32 mm in length (socket to socket) due to the different sizes of the teeth, arches and the jaws. In at least some embodiments, longer, shorter, or different length correctors are used.
  • the corrector of the same assembly as described below will be used with the following changes for usage with aligners.
  • the corrector is usable with braces and other orthodontics.
  • FIG. 15 is a cross section view of corrector 1500.
  • the corrector 1500 includes a first socket connector 1502 (as described above with respect to socket connector 102), a receiving tube segment 1504 having a hollow interior, a middle segment 1506, a threaded rod 1508, and a second socket connector 1510 (as described above with respect to socket connector 110).
  • a spring 1512 is positioned within the hollow interior of receiving tube segment 1504.
  • Receiving tube segment 1504, middle segment 1506, and threaded rod 1508 are collectively referred to as telescopic rod 1514.
  • An end of receiving tube segment 1504 includes a removable cap to retain the spring within the interior.
  • the end of the receiving tube segment 1504 is a closed portion.
  • the removable cap is threaded onto the end of receiving tube segment 1504.
  • the corrector 1500 comprises the telescopic rod 1514 where the compression spring is housed within the thickest portion (also referred to as the receiving tube segment 1504) of the telescopic rod 1514.
  • FIGs. 18-24 are images of the corrector 1500 having the compression spring housed within the telescopic rod 1514.
  • the Corrector also comprises snap-on areas (also referred to as socket connectors 1502/1510) at opposite ends for both molar and cuspid region connections. Buttons are positioned on the aligners for both upper and lower molar areas where the snap-on areas of the connector 1500 are attachable.
  • the Telescopic feature is all in one piece and does not have a threaded rod in the spring as in other approaches.
  • the telescopic feature has an internal spring 1512 that is activated with the abutment of the end of middle segment (or cylinder) 1506 sliding upon closure of the mouth onto the spring, thus compressing the spring 1512 inside the larger cylinder of the receiving tube segment 1504 hollow interior.
  • a threaded snap-on head part 1516 also see 2010 (FIG. 20)
  • the threaded rod 1508 see also last (smallest diameter) part 2014 of FIG. 20
  • Receiving tube segment 1504 is similar in length to spring 104/204 and again comes in five different sizes of 18 mm, 22 mm, 25 mm, 29 mm, or 32 mm.
  • the spring within the tube segment 1504 is similar in operation to spring 104/204.
  • the spring within the tube segment 1504 is similar in operation to compression/tension spring 104/204; however, and when fully compressed takes up no more than ⁇ 5 mm within the receiving tube.
  • the middle part of the telescopic part 1506 that slides in and compresses the coil is about 5 mm less than the size of the receiving tube and finally the threaded push rod 1508 is the same size or even longer than the middle segment if need be to allow for maximal extension, and when compressed extends all the way through the middle of the compression spring.
  • the threaded part of the push rod is about 6 mm in length to allow for adjustment into the socket 1510 at the end.
  • the corrector 1500 is adjustable during installation as well as during the process of the correction of the teeth.
  • the rod 1508 slides into the middle segment 1506 to eventually push the middle segment into contact with the spring within the large cylinder, i.e., receiving tube segment 1504.
  • FIG. 17 is a cross section view of middle segment 1506 in contact with the spring.
  • FIG. 16 is a cross section view of middle segment in contact with the spring and threaded rod 1508 extending within middle segment 1506.
  • the rod 1508 freely slides in the middle segment 1506 as well as within the spring in the receiving tube segment 1504.
  • the rod 1508 has a smaller cross section diameter than the spring.
  • the rod 1508 is a bit longer than the middle segment 1506 to allow the telescopic feature to have the capability to become as long as possible for maximal opening of the mouth without restrictions.
  • Figure 21 is an image of another version of the corrector that has a white acrylic cylinder (but could be in different colors, as well, in other embodiments) that houses the spring and the telescopic rod 1508.
  • the telescopic rod is metallic (FIG. 20).
  • the plier is holding the area where the snap on head (second socket connector 1510 of the cuspid region again can be turned clockwise or counterclockwise to increase or decrease the activation of the appliance by making the corrector longer or shorter.
  • the screw portion is laser or color marked to show the patient where the head needs to be and/or make it difficult to accidentally turn.
  • each turn results in 1 mm of activation and enabling a maximum of up to 5-6 mm in activation increase or decrease.
  • the activation technique applies to all embodiments.
  • the socket connectors connect (i.e., snap) onto the buttons on the aligners to be held in place (FIG. 19). Because it is a ball-socket joint once connected, it will be very comfortable and make movement of the corrector easy in many different directions. If the socket connectors snap off a ball for any reason (usually by getting hit in the mouth), they can easily be snapped back on to the ball.
  • a Bansbach style socket is used for the socket connector.
  • the Bansbach style socket has a flexible spring inside the socket to allow for the ball to be pushed into the interior and secured tightly inside with ease, and to allow for easier snapping off the socket away from the ball by a 90 degree pulling away action.
  • the aligners and the connectors are taken out for eating and brushing or any special occasion but usually are worn at all times including bedtime.
  • the arm and the push rods are manufacturable in tooth color or clear strong and rigid acrylic (safe for dental) materials. We want it to look incognito of course, and actually they will be because they attach on the sides of teeth inside the mouth and get covered with the cheeks very nicely. Also, they will be lighter in weight and stay mouth-friendlier (FIG. 19). [0052]
  • This appliance can be taken off during important meetings, or due to any sores in the mouth or any other important events or issues, and aligners still can be worn. If we need the patient to wear the devices only at night, they can then install the devices at night-time.
  • the patient can push the molar socket connector part of the corrector that is marked on the outside of the socket (R: for the right and L: for the left) onto the buttons of the lower molar regions of the aligner while the aligners are out of the mouth.
  • the patient now:
  • the patient connects the lower molar socket connectors of the snap on corrector to the buttons on both sides, or if needed to wear only on one side (i.e., dental midline corrections, unilateral bite corrections, or facial asymmetries as in FIG. 24) outside of the mouth.
  • This pre-measured telescopic mechanism slightly longer by turning the push rod counterclockwise (or clockwise to lessen the forces as needed as in FIG. 21) so the spring can be activated or compressed gently after the snapping insertion.
  • this telescopic mechanism of the corrector has at least three major advantages over many of the other or similar features.
  • the first one is that this corrector is easily removable and not fixed, therefore patients can manage emergencies without seeing the orthodontist until the situation is resolved.
  • the second and another important feature is that all teeth movements are under control, while the corrections are taking place. In other words, not only the correction of the molars and cuspids but all the rest of the teeth into ideal positions are taking place concurrently into a perfect occlusion. This cuts down on treatment time much more than some other techniques.
  • the third advantage and another important factor is that if the patient does not wear the elastics to make the corrector active, and there will NOT be any negative side effects as we have with some of the featured devices in the market requiring elastics wear to negate the unwanted forces of the devices.
  • Some of the telescopic mechanisms in the market rely solely on the patient's cooperation to fight the negative side effects. Because those appliances are fixed and bonded to the teeth, they can worsen the issue if the patient is not wearing the elastics, and may cause true orthodontic emergencies if part of their device accidentally detaches from the teeth, and unfortunately the patient may not be able to remove the device.
  • ball hooks can be used for placement of rubber bands, too. We recommend keeping them on at all times if needed or to wear it at bed-time for less complicated corrections. We can measure and install this in less than a minute, and patients can remove it at any time in less than 5 seconds.
  • the socket connectors are press fit by hand on the ball (ball hooks) to connect the corrector to the teeth.
  • This Corrector may be used in case of pure skeletal advancements or retractions in growing children by inserting Ball screws in the upper and lower jaw bones above the upper first molars and lower cuspids.
  • the concept of these Ball screws is similar to Temporary Anchorage Devices (TADS) currently in use for orthodontics.
  • TADS Temporary Anchorage Devices
  • the Ball anchors into the bone under local anesthesia or topical anesthetics (FIG. 11).
  • These correctors may be used in conjunction with braces, aligners or just by themselves. In Skeletal cases, it is best to keep the corrector on at all times or 14 hours for the minimum, but again they can be removed as necessary.
  • the telescopic mechanism allows the patient to open the mouth without any restrictions for both Class 11 and 111 corrections, where the forces are always directed by pushing rather than pulling.
  • the spring and push/pull rod mechanism described herein there will be resistance upon opening the mouth.
  • This is a disadvantage in case of the aligners as they may be pulled away from the upper and lower teeth so they can easily pop out, but not with braces other than just the restriction.
  • Another advantage of one or more embodiments of this mechanism is again due to its pushing mechanism upon closure, therefore the aligners will seat and stay in the mouth securely compared to the use of elastics (rubber bands).
  • the forces are always directed by a pulling mechanism where the aligners have a tendency to either pop out or move up and down at times when the patient opens the mouth, therefore it could be frustrating for the patient and the operator, but we do not have this issue with the telescopic mechanism.
  • the area of the aligners where the slits or cuts are made for the elastic connections may flare out with the elastics and cause irritations to the patient’s cheeks and lips, as well.
  • the compression spring/ telescopic push rod mechanism of one or more embodiments of the corrector will be possibly the best and most effective way to use for both the aligners, braces, sleep apnea devices or the bone screw attachments in case of both Class II and III malocclusions or skeletal discrepancies in growing children.
  • the device is extremely versatile and is also usable for other corrections such as within the same arch.
  • Molars that need to be uprighted in cases where the teeth are tilted too far forward (mesially), which is called distalization of the molars, are able to be pushed back (FIG. 25).
  • the spring is a compression spring to create the pushing action upon connections. It is best to place the buttons directly on the teeth to be distalized rather than the aligners and to cut (or otherwise form openings in) the aligner around the buttons so that the corrector can be connected. Bio-mechanically, it is best to keep the buttons on the aligners where all teeth can be used as a group anchor against the tooth being distalized.
  • the corrector is usable to help with space closures within the same arch (whether upper or lower posterior teeth). It will help bring the teeth together by a pulling mechanism rather than a pushing action. Again, it is best to place the buttons directly on the teeth to be mesialized rather than the aligners and to cut (or otherwise form openings in) the aligner around the buttons precisely so that the corrector can be connected. Bio- mechanically, it is best to keep the buttons on the aligners where all teeth can be used as a group anchor against the tooth being mesialized.
  • the Corrector is positioned to be connected across the palate on the molars to push out on the molars and help with expansion of the arch as well as posterior crossbite corrections where the upper molars must be moved toward the cheeks.
  • this corrector also could be used with full coverage upper and lower occlusal acrylic splints (similar to night-guards) to help push the lower jaw forward in adults at nighttime.
  • the corrector is extremely effective in opening the posterior pharyngeal space (airway) to help patients with sleep apnea.
  • This spring and telescopic rod mechanism also can be used directly on upper and lower posterior teeth or bone screw, when there is what is called a super-eruption of a tooth (also referred to as extrusions).
  • Super-eruption of teeth occurs when the opposing teeth are missing (extractions, congenitally missing teeth, broken down teeth, or the like) and therefore the tooth over-erupts into the opposing missing-tooth space. This is extremely challenging in orthodontics to push the super-erupted tooth back into the bone socket (intrusion) so that the lost opposing clinical space can be recovered.
  • bone screw buttons and the tooth buttons are all dependent on what needs to be achieved, as the placement of the corrector on either side has a tendency to push that side in more than the other, therefore for pure intrusions of teeth, placement of the corrector on both buccal and the lingual will be ideal especially in the case of aligners where torquing is more challenging than with the braces.
  • the left telescopic and the right telescopic assemblies can be used for both Class II or III corrections of the same side.
  • the molar snap on could be connected to either the upper molar or the lower molars and the same pertains to the cuspids, depending on what classification of occlusion needs to be corrected (only the direction of the forces will be changed). Therefore, fabrication at the factory and the inventory for the doctor stays simple, limited and effective.
  • Figure 19 is an image of another version of the spring telescopic rod which is all in white acrylic. It is more aesthetically pleasing especially in cases of aligners or the ceramic braces, and the compression spring is housed within the thickest diameter area of the cylinder. As the patient closes their mouth and the telescopic cylinders slide within each another, the spring becomes compressively active and the movement of the teeth starts.
  • the correctors are in different colors/patterns to make them more fun for the younger and teen patients.
  • the black snap on heads (socket connectors) also can be made in white to make it very incognito in use.
  • FIG. 26 and 27 are images of another version of the corrector. The spring is on the outside of the telescopic rod. It might be easier to make a stronger spring in this version; however, it is not as aesthetically pleasing for the patients.
  • a corrector assembly according to another embodiment usable with the snap on corrector described above utilizes the following or a similar mechanism of action described above for the snap-on correction.
  • a different locking module for the braces is described as follows.
  • the first and second socket connectors are connected to the ends of the telescopic spring device.
  • the device is for the correction of Class III skeletal and dental issues (lower jaw and/or teeth sitting more forward compared to the upper jaw and/or teeth).
  • the device is usable with braces and/or combined with other fixed appliances connected to the upper and/or lower jaws/arches in early treatment of growing children.
  • the first socket connector is as described above.
  • the first socket connector is for connecting the large cylinder of the telescoping part of the device to an orthodontic mount (also referred to as a band) on the upper molar of a patient.
  • the first socket connector is used to connect the telescopic spring.
  • the second socket connector is as described above and is connected at the end of the push rod of the telescopic spring.
  • the second socket connector is for connecting the push rod onto a ball on a mount (also referred to as brackets) on the lower bicuspid or the first bicuspid and the cuspid of a patient for Class II patients.
  • the second socket connector is hingedly or rotationally crimped at the end of the push rod such as the Forsus which is hard to remove even with pliers.
  • the socket connector enables quick and easy release of the second socket connector (at the end of the push rod) from the ball on the mount.
  • the second socket connector can then be repositioned on balls of two different mounts on the upper teeth of the patient for class III cases.
  • the compression spring may have different sizes and can be changed through the end cap of the large cylinder.
  • the tension spring has a larger or smaller amount of elastic force to assist with pushing forces.
  • the socket connectors are already soldered or connected to the pieces prior to use, e.g., in the factory.
  • the first socket connector which is connected to the upper molar tube, is pre-connected onto the telescopic spring part (with a ball joint) to allow for ease of movement during mastication.
  • the other part is the push rod of the telescope which is threaded at the end that gets screwed into the tension spring and includes the second socket connector that gets connected to the bicuspid/cupid area. Therefore, the telescopic spring gets connected to the upper molar band by snapping the first socket connector to the ball on the molar band.
  • the socket connector gets disconnected from the ball in seconds, and the push rod is held with a plicr and the socket connector I pull rod will be threaded counterclockwise (will be a ⁇ 5-6 mm pitch) to make the device longer to create more activation upon closure, and reconnect the socket connector. So, installations, adjustments and removals can be performed all in seconds after proficiency.
  • telescopic springs in 5 sizes of 18, 23, 25, 27, 32 mm gives the operator flexibility. In some embodiments, longer or shorter spring lengths are usable. In at least one embodiment, a total telescopic spring size of about 25 mm in average length with the threaded portion of about 6-8 mm again will be sufficient to create less forces by threading in or to push more (threaded out to make longer) and activate. In a Forsus-style arrangement embodiment, the spring size is always the same as about 23mm, and we have different size rods to be able to activate initially. An issue that arises in other approaches is if the patient opens the mouth wide, the rod and the spring sometimes may separate due to its design and can potentially hurt the patient. In at least one embodiment of the present invention, the spring can never be separated no matter how wide the patient opens, because the telescopic spring is all sliding within each other and can not separate.
  • a goal of the additional threading is to impart a range of tension from about 6 ounces to about 8 ounces of force for varying lengths.
  • each complete rotation of the threaded rod into the spring adjusts the tension force by 2 ounces of forces due to lengthening the span of the device.
  • the doctor is able to vary the amount of force being applied to the movement of the teeth by greater or lesser threading of the threaded rod into the spring. Additionally, repositioning of the attachment is simplified using the second socket connector.
  • Current approaches using a Forsus appliance require the crimping of wire ends in the mouth of the patient which is uncomfortable and very hard to remove with a possibility of accidental pinching of the lips.
  • Template 1 as shown in FIG. 12, is a very thin (the thinnest template possible: ⁇ 0.5mm or less in some embodiments) maybe even a bit thinner than what is currently in use.
  • This template has the exact shape of the base area of the attachment that gets bonded to the teeth in them. So, when the template is seated on the teeth only the areas of the teeth for bonding of the attachments is visible through the orifices, and everywhere else is covered with the Template 1 (FIG. 12).
  • Template 1 The exterior part of Template 1 around the orifices must be dabbed with a very thin coat of Vaseline or preferably Tinfoil substance used in dentistry (such as COE- SEP) before seating on the teeth or this could be done at the lab before shipment.
  • Template 1 is seated over cleaned teeth, and the surfaces of those teeth areas to be bonded for the attachments are prepared.
  • One-minute acid etching (via the gel format rather than liquid) is used, the gel is wiped with a Qtip or cotton roll or swab, and the enamel is rinsed with water. Therefore, the acid etch cannot get all over the teeth and only the areas needing to be bonded get etched.
  • Template 2 shown in FIG. 13, is now ready for the composite material to be injected into the bubble parts or negative areas of the template corresponding to the open areas or orifices of Template 1 .
  • the bubble parts (also referred to as dimples) of Template 2 protrude away from the tooth surface.
  • the dimples are arranged to align with the open areas of Template 1 when Template 2 is positioned over Template 1. So, after the materials are injected into the dimples, Template 2 is seated (positioned) over Template 1. The curing light is used to cure all the composite materials.
  • the positioning attachments 1310 are now bonded on the teeth.
  • Template 2 now will be removed easily and also any materials that are sandwiched between the two are solely inside the Template 2, or on the exterior of Template 1.
  • the templates will not bond to each other because we have already used the Tinfoil substance or Vaseline on the exterior of the Template 1.
  • the orifice sizes must be modified regarding each particular movement accordingly, so the teeth can move and have sufficient adjustment, i.e., play or wiggle, room. It must be noted that if the positioning attachments 1310 do not fit well into the aligners, with patients moving into the subsequent aligners, they will gradually not only not help with alignment but prevent the aligners to even seat correctly, and can move the teeth in unwanted or worse positions.
  • bracket positioning In orthodontics, precise bracket positioning is very challenging. A lot of different approaches have been tried and some are currently being used to help with this problem. While I have proposed a bonding technique to be able to reposition the brackets later by slide and fly mechanism without the actual removal of the bracket, all efforts must be made to place the brackets as accurately as possible from the start. However, it is impossible to avoid bracket repositioning one hundred percent of the time no matter how hard we try because we are dealing with nature, operational errors and at times due to severe positioning of the teeth.
  • brackets are placed on models with wax ahead of time, and clear flexible trays (also referred to as jigs) will be made over the brackets and the model. Therefore, once the jigs are removed the brackets will come off along with it inside the tray. This jig that carries the brackets (which have been coated with bonding materials), will be seated over the already prepared surfaces of the teeth and cured with a light. Once the jigs are removed the brackets will stay bonded on the teeth and therefore the braces are placed based on what has been done at the lab or possibly the orthodontist in his office.
  • bracket bases of all popular brackets in the market we scan the bracket bases of all popular brackets in the market.
  • the brackets all have particular shapes and are manufactured by many different companies.
  • the data representing the size and shape of the brackets will be stored in a database.
  • the orthodontist scans the patient's teeth by using a scanner (e.g., iTero) and stores the scan data. After the scans of the teeth are complete, the exact bracket used by the orthodontist, such as 3M, Ormco, American, etc., for their patients is selected.
  • the digital brackets are displayed on the screen as how the orthodontist normally sets them on the bracket trays, showing all the upper and lower brackets. Therefore, the orthodontist will select the desired bracket (which is for that particular tooth) with a cursor and by holding the left button of the mouse he/she will be able to drag and move it and place it on the three dimensional scan of each tooth (STL). The orthodontist will be able to move the bracket in any direction (360 degrees) as well as up and down to place it as best as possible on the tooth like in the patient's mouth. This will be repeated for all the desired teeth to be bracketed.
  • the software will have a measurement grid so the orthodontist knows exactly where the brackets are being placed and is able to measure the cusp tips and along the sides of the teeth to the bracket, or the like.
  • the software can also incorporate any 3D radiographs to see the root structures, and display in the upper left corner, while the bracket placements and positioning are being done to assist with as accurate bracket placements, as possible.
  • the software stores the scan of the teeth, bracket selection, and bracket positioning.
  • bracket templates are similar to Template 1 (FIG. 12) of the attachment templates system described above.
  • the bracket templates are roughly about 0.5mm in thickness or as needed based on the thickness of the bracket base.
  • the bracket templates have very fine vertical cuts from the gum line to the bracket orifices for ease of removal later.
  • the stored scan of the teeth, bracket selection, and bracket positioning information is transmitted to another computer for processing and printing of the bracket template.
  • the bracket template is then sent to the orthodontist.
  • the assistants prepare the teeth to be bracketed. After the teeth are etched and primed, the template is seated on the teeth, or we can seat the template and then prepare the teeth depending on the preference of the orthodontist. At this point, each tooth has an orifice showing where the brackets are going to fit. All the assistants have to do is to carry the brackets with their bases that are already coated with the bonding material, and place them in the cut out orifices which is an exact match of the bracket base. After the brackets are all seated and fitted perfectly in them, a curing light is shined, and the brackets are now bonded to the teeth. The templates are removed and the patient’s braces are on.
  • a major advantage of at least one embodiment of this system is that:
  • brackets indirectly on the teeth where he would prefer, without additional time spent manually placing the brackets on the patient’s teeth, losing time or doing guess-work in the patient’s mouth. Yet, the brackets are placed directly on teeth by the assistants rather than sitting a jig with all the bonding materials that can rub off the bracket bases when they are being seated indirectly. Therefore, the chances of bracket failure will be much less.
  • FIG. 28 is an operational flow for using an orthodontic device for orthodontic treatment, according to at least one embodiment of the present invention.
  • the operational flow provides a method for orthodontic treatment.
  • the method is performed by using an orthodontic device, such as orthodontic device 200 shown in FIG. 2.
  • the first socket connector is attached.
  • the first socket connector is attached to an upper tooth band of a patient.
  • the first socket connector may be first socket connector 202 shown in FIGs. 2(a) and 2(b).
  • the threaded pull rod is inserted.
  • the threaded pull rod is inserted into the elongated spring to a first distance or depth.
  • the first distance or depth is 2 mm.
  • the pull rod may be pull rod 208 shown in FIGs. 2(a) and 2(b).
  • S622 occurs prior to S620.
  • the second socket connector is attached.
  • the second socket connector is attached to a ball on a mounts (brackets) on the lower teeth of the patient.
  • the second socket connector may be second socket connector 210 shown in FIGs. 2(a) and 2(b).
  • whether there is enough spring tension/compression is determined. In at least some embodiments, whether the spring has enough tension/compression is determined after the second socket connector is attached. When the spring is not under tension and the threaded rod is attached, the length of the variable tension pull rod is less than the distance from the upper molar attachment point to the closer of the two lower brackets on the teeth. In at least some embodiments, the threaded pull rod is turned to be threaded into the spring while leaving an additional 4 mm of threading available on the threaded pull rod. In this manner, when attaching the second socket connector to the ball on the lower teeth mount, the spring is put under tension and stays active (under tension) at all times.
  • the tension in the pull rod results in an even more but yet gentle pulling motion (back into the patient’s mouth) on the lower teeth and a pushing motion (out of the patient’s mouth) on the upper teeth.
  • the spring is put under compression instead of tension.
  • the additional threading is about 6 mm instead of 4 mm, and a goal of the additional threading is to impart a range of tension from about 6 ounces to about 8 ounces of force.
  • the initial length of the threaded pull rod extending outside the elongated spring is at least 6 mm.
  • each complete rotation of the threaded rod into the spring adjusts the tension force by 2 ounces of forces due to shortening the span of the device.
  • the tension of the variable tension pull rod ranges from 0 to 8 ounces of force.
  • the second socket connector is disconnected. In at least some embodiments, the second socket connector is disconnected from the ball on the lower teeth mount.
  • the threaded pull rod is rotated. In at least some embodiments, the threaded pull rod is rotated to extend further into the elongated spring. In at least some embodiments, the threaded rod is rotated by making a single turn of the threaded rod within the elongated spring. In at least some embodiments, each single turn results in a 1 mm reduction in the length of the orthodontic device. In at least some embodiments, each single turn results in an increase in force of 1 ounce.
  • the second socket connector is reattached.
  • the second socket connector is reattached to the ball on the lower teeth mount.
  • the spring is under less tension.
  • the second socket connector is disconnected from the ball of the lower teeth mount by unsnapping the socket connector from the ball, and the threaded pull rod is turned in clockwise to be threaded further into the spring.
  • the threading in the pull rod and spring is such that the threaded pull rod is turned counter-clockwise to be threaded further into the spring.
  • the overall length of the variable tension pull rod is thereby reduced.
  • each complete turn of the threaded pull rod imparts an additional 1 ounce of force.
  • the threaded pull rod is turned each time to reduce the overall length by 1 mm.
  • each turn of the threaded pull rod reduces the overall length by more or less than 1 mm.
  • the second socket connector is then reattached to the ball on the lower teeth mount by snapping the socket connector onto the ball thereby putting the spring into tension and continuing to pull on the lower teeth and push on the upper teeth. In at least some embodiments, the process is then repeated when there is not enough tension on the spring.
  • the doctor is able to vary the amount of force being applied to the movement of the teeth by greater or lesser threading of the threaded pull rod into the spring. In at least some embodiments, the amount of force is varied by rotating the threaded pull rod within the elongated spring.
  • Current approaches using a ForsusTM appliance require the crimping of wire ends in the mouth of the patient, which is uncomfortable and time consuming, and with the possibility of harm to the patient.
  • repositioning of the attachment is simplified using the socket connector.
  • FIG. 29 is a block diagram of a processing system 900 in accordance with some embodiments.
  • processing system 2900 is a general purpose computing device including a hardware processor 2902 and a non-transitory, computer-readable storage medium 2904.
  • Storage medium 2904 is encoded with, i.e., stores, computer program code 2906, i.e., a set of executable instructions.
  • Execution of instructions 2906 by hardware processor 2902 represents (at least in part) a tool which implements a portion or all of the methods described herein in accordance with one or more embodiments (hereinafter, the noted processes and/or methods).
  • Processor 2902 is electrically coupled to computer-readable storage medium 2904 via a bus 2908.
  • Processor 2902 is also electrically coupled to an I/O interface 2910 by bus 2908.
  • a network interface 2912 is also electrically connected to processor 2902 via bus 2908.
  • Network interface 2912 is connected to a network 2914, so that processor 2902 and computer-readable storage medium 2904 are capable of connecting to external elements via network 2914.
  • Processor 2902 is configured to execute computer program code 2906 encoded in computer-readable storage medium 2904 in order to cause system 2900 to be usable for performing a portion or all of the noted processes and/or methods.
  • processor 2902 is a central processing unit (CPU), a multiprocessor, a distributed processing system, an application specific integrated circuit (ASIC), and/or a suitable processing unit.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • computer-readable storage medium 2904 is an electronic, magnetic, optical, electromagnetic, infrared, and/or a semiconductor system (or apparatus or device).
  • computer-readable storage medium 2904 includes a semiconductor or solid-state memory, a magnetic tape, a removable computer diskette, a random access memory (RAM), a read-only memory (ROM), a rigid magnetic disk, and/or an optical disk.
  • computer- readable storage medium 2904 includes a compact disk-read only memory (CD-ROM), a compact disk-read/write (CD-R/W), and/or a digital video disc (DVD).
  • storage medium 2904 stores computer program code 2906 configured to cause system 2900 (where such execution represents (at least in part) the EDA tool) to be usable for performing a portion or all of the noted processes and/or methods.
  • storage medium 2904 also stores information including data and/or parameters and/or information 2916 which facilitates performing a portion or all of the noted processes and/or methods.
  • Processing system 2900 includes I/O interface 2910.
  • I/O interface 2910 is coupled to external circuitry.
  • I/O interface 2910 includes a keyboard, keypad, mouse, trackball, trackpad, touchscreen, and/or cursor direction keys for communicating information and commands to processor 2902.
  • Processing system 2900 also includes network interface 2912 coupled to processor 2902.
  • Network interface 2912 allows system 2900 to communicate with network 2914, to which one or more other computer systems are connected.
  • Network interface 2912 includes wireless network interfaces such as BLUETOOTH, WIFI, WIMAX, GPRS, or WCDMA; or wired network interfaces such as ETHERNET, USB, or IEEE- 1364.
  • a portion or all of noted processes and/or methods is implemented in two or more systems 2900.
  • System 2900 is configured to receive information through I/O interface 2910.
  • the information received through I/O interface 2910 includes one or more of instructions, data, design rules, libraries of standard cells, and/or other parameters for processing by processor 2902.
  • the information is transferred to processor 2902 via bus 2908.
  • System 2900 is configured to receive information related to a UI through I/O interface 2910.
  • the information is stored in computer-readable medium 2904 as user interface (UI) 2942.
  • UI user interface
  • a portion or all of the noted processes and/or methods is implemented as a standalone software application for execution by a processor. In some embodiments, a portion or all of the noted processes and/or methods is implemented as a software application that is a part of an additional software application. In some embodiments, a portion or all of the noted processes and/or methods is implemented as a plug-in to a software application. In some embodiments, a portion or all of the noted processes and/or methods is implemented as a software application that is used by system 2900.
  • the processes are realized as functions of a program stored in a non-transitory computer readable recording medium.
  • a non-transitory computer readable recording medium include, but are not limited to, external/removable and/or internal/built-in storage or memory unit, e.g., one or more of an optical disk, such as a DVD, a magnetic disk, such as a hard disk, a semiconductor memory, such as a ROM, a RAM, a memory card, and the like.

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Abstract

L'invention concerne un correcteur à encliquetage pour un traitement orthodontique. Le correcteur conçu à l'origine comporte une tige de traction à tension variable ayant une construction en deux parties comprenant : un ressort allongé ayant une partie filetée au niveau d'une extrémité ; et une tige filetée pourvue d'une partie filetée correspondante pour s'ajuster dans la partie filetée du ressort allongé ; un premier connecteur à une alvéole dentaire relié à une extrémité du ressort allongé ; et un second connecteur à une alvéole dentaire relié à une extrémité de la tige filetée, le second connecteur à une alvéole dentaire se situant au niveau d'une extrémité distale par rapport au premier connecteur à une alvéole dentaire pendant l'insertion de la tige filetée dans le ressort allongé. Dans un mode de réalisation, le correcteur comprend un ressort en liaison avec un mécanisme à tige de poussée télescopique permettant de maintenir une pression active pour des corrections. Dans un mode de réalisation, le correcteur comprend des boutons à encliquetage pour la liaison dans les deux zones avec des aligneurs ou des arcs modifiés.
PCT/US2024/046472 2023-11-15 2024-09-12 Positionnements de correcteur à encliquetage et de points d'ancrage pour traitements par aligneur orthodontique Pending WO2025106148A1 (fr)

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US63/599,047 2023-11-15
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US63/639,458 2024-04-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944518A (en) * 1997-03-19 1999-08-31 Sabbagh; Aladin Device for correcting jaw and tooth malpositioning
US6113390A (en) * 1999-05-07 2000-09-05 Ormco Corporation Orthodontic bite fixing appliance
US20070190477A1 (en) * 2006-01-11 2007-08-16 Ormco Corporation Orthodontic device and method for treating malocclusions
US20140255866A1 (en) * 2013-03-11 2014-09-11 American Orthodontics Corporation Telescopic Orthodontic Appliance
US20160220331A1 (en) * 2015-02-02 2016-08-04 Michael Stuart Johnston Orthodontic bite corrector
US20220175495A1 (en) * 2019-11-04 2022-06-09 Shanghai Ninth People's Hospital, Shanghai Jiaotong University School Of Medicine Force applying device for orthodontic treatment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944518A (en) * 1997-03-19 1999-08-31 Sabbagh; Aladin Device for correcting jaw and tooth malpositioning
US6113390A (en) * 1999-05-07 2000-09-05 Ormco Corporation Orthodontic bite fixing appliance
US20070190477A1 (en) * 2006-01-11 2007-08-16 Ormco Corporation Orthodontic device and method for treating malocclusions
US20140255866A1 (en) * 2013-03-11 2014-09-11 American Orthodontics Corporation Telescopic Orthodontic Appliance
US20160220331A1 (en) * 2015-02-02 2016-08-04 Michael Stuart Johnston Orthodontic bite corrector
US20220175495A1 (en) * 2019-11-04 2022-06-09 Shanghai Ninth People's Hospital, Shanghai Jiaotong University School Of Medicine Force applying device for orthodontic treatment

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