Search

CN-224206909-U - Dental appliance

CN224206909UCN 224206909 UCN224206909 UCN 224206909UCN-224206909-U

Abstract

The dental appliance comprises a shell-shaped dental appliance and an external dental appliance, wherein a connecting part and a retaining part arranged on one side of the middle of the connecting part are convexly arranged on the cheek side of a rear dental area on the left side and the right side of the shell-shaped dental appliance in the far dental direction, an internal dental appliance body of the external dental appliance comprises a free section connected with the connecting part and a retaining section connected with the retaining part, the retaining part comprises a containing part and a limiting part arranged adjacently to the containing part, the limiting part is provided with an opening structure, the retaining section is pressed into the containing part through the opening structure in a first direction, the limiting part limits the retaining section to be separated from the retaining part, the free section is inserted into the connecting part in a second direction, and when the external dental appliance body is pulled backwards in the sagittal direction, the external dental appliance exerts a sagittal traction force on the shell-shaped dental appliance so that the whole tooth contained by the shell-shaped dental appliance moves backwards or at least part of the tooth contained in the tooth moves backwards in the far direction, and the first direction and the second direction are different.

Inventors

  • WANG XINGXING
  • WU PANPAN
  • YAO JUNFENG

Assignees

  • 正雅齿科科技(上海)有限公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (12)

  1. 1. A dental appliance is characterized by comprising a shell-shaped dental appliance for accommodating teeth of a patient and an external arch device; The cheek side surfaces of the rear tooth areas on the left side and the right side of the shell-shaped tooth appliance are convexly provided with connecting parts towards the far tooth direction, and the retaining parts are arranged on the near middle side of the connecting parts, and the retaining parts and the connecting parts are arranged at preset distances; The external dental arch device comprises an internal dental arch body which is positioned in the mouth of a patient and is basically consistent with the dental arch state, and an external dental arch body which is connected with the internal dental arch body and is positioned outside the mouth of the patient, wherein the internal dental arch body comprises a free section connected with the connecting part and a retaining section connected with the retaining part, and the free section is connected with the retaining section through a connecting section; The retaining part comprises a containing part and a limiting part arranged adjacent to the containing part, the limiting part is provided with an opening structure communicated with a cavity enclosed by the containing part, when the inner arch body is assembled with the shell-shaped dental appliance, the retaining section of the inner arch body is pressed into and contained in the containing part through the opening structure along a first direction, the limiting part limits the retaining section to be separated from the retaining part along a direction opposite to the first direction, the free section of the inner arch body is inserted into and contained in the connecting part along a second direction, and when the outer arch body is pulled backwards along a sagittal direction, the outer arch device applies a sagittal backward traction force to the shell-shaped dental appliance so as to enable the whole tooth contained in the shell-shaped dental appliance to move forwards or at least part of the tooth contained in the appliance to move backwards forwards, wherein the first direction and the second direction are different.
  2. 2. The dental appliance of claim 1, wherein the first direction is buccal lingual or gingival and jaw, and the second direction is mesial-distal.
  3. 3. The dental appliance of claim 2, wherein the first direction is a buccal-lingual direction, the opening structure is disposed on a buccal side of the limiter portion, or, The first direction is the gingival and jaw direction, the opening structure set up in spacing portion near one side of gum or the one side of keeping away from the gum.
  4. 4. The dental appliance of claim 1, wherein the inner dimension of the receiving portion is less than or equal to the outer dimension of the retention segment such that the retention segment is secured within the receiving portion when received therein, the inner dimension of the retaining portion being less than the outer dimension of the retention segment to limit the retention segment from exiting the receiving portion.
  5. 5. The dental appliance of claim 4, wherein the outer profile dimension of the retention segment is a radial dimension of the outer profile cross-section of the retention segment in a predetermined direction, and the inner profile dimension of the receptacle is a radial dimension of the inner profile cross-section of the receptacle in the predetermined direction, wherein the predetermined direction is different from the first direction.
  6. 6. The dental appliance of claim 1, wherein the retention portion and the connection portion are at the same elevation in the gingival and jaw directions.
  7. 7. The dental appliance of claim 1, wherein the limiting portion comprises two elastic pieces, the opening structure is formed between the two elastic pieces, the retention section is pressed in the first direction from the opening structure and is accommodated in the accommodating portion when assembled, and the two elastic pieces clamp and limit the retention section so as to limit the retention section from being separated from the accommodating portion.
  8. 8. The dental appliance of claim 1, wherein the retention portion further comprises a guide portion disposed adjacent the spacing portion, the guide portion having an inner profile that tapers from an end distal to the spacing portion to an end proximal to the spacing portion.
  9. 9. The dental appliance of any one of claims 1 to 8, wherein the retention portion is further provided with a retention cap that limits the removal of the retention section from the retention portion, the retention cap being provided with a first connector, the retention portion being provided with a second connector on a side thereof proximal to the open end, the retention cap being connected to the retention portion by the mating of the first connector and the second connector, at least a portion of the edge of the retention cap being in snap-fit with a portion of the edge of the open end of the retention portion to retain the retention section in the receptacle.
  10. 10. The dental appliance of any one of claims 1 to 8, wherein the retention portion is provided with a mounting portion on a side of the shell-like dental appliance, the shell-like dental appliance being provided with a mounting hole at a location corresponding to the retention portion, the mounting portion passing through the mounting hole and being retained on an inner surface of a portion of the shell-like dental appliance at a periphery of the mounting hole.
  11. 11. The dental appliance of claim 10, wherein the mounting portion includes a main body portion and a constraint portion, one end of the constraint portion is connected to the main body portion, the other end of the constraint portion is a free end, an included angle between the constraint portion and the main body portion is an acute angle, the constraint portion includes a guide end and a constraint end opposite to the guide end, an outer dimension of the guide end is smaller than or equal to an inner dimension of the mounting hole, an outer dimension of the constraint end is larger than the inner dimension of the mounting hole, the guide end is inserted into the mounting hole in the first direction when mounted, and the constraint end is retracted inward in the main body portion direction under constraint of the mounting hole to pass through the mounting hole and to be retained on an inner surface of a portion of the shell-shaped dental appliance at a periphery of the mounting hole.
  12. 12. The dental appliance of claim 11, wherein the plurality of restraining portions are spaced apart along the longitudinal axis of the main body portion, and a dimension of a space between two adjacent restraining portions or a dimension of a space between the restraining portion and the retaining portion adjacent to the retaining portion is greater than or equal to a thickness of the shell-shaped dental appliance at the periphery of the mounting hole.

Description

Dental appliance Technical Field The present utility model relates to the field of medical devices, and more particularly to the field of oral appliances, and in particular to a dental appliance for tooth movement in the distal direction. Background In orthodontic treatment, some cases, especially when the teeth are moved distantly as a whole or when the posterior teeth are moved distantly, are required to be anchorage-enhanced by extraoral anchorage, for example, extraoral arch devices may be used to be anchorage-enhanced. The external arch device can be used alone and directly arranged on the cheek side of the teeth in the back teeth area, and can also be used in combination with shell-shaped tooth correcting devices which are more popular in recent years and arranged on the cheek side of the back teeth area of the shell-shaped tooth correcting devices. In the prior art, when an external dental arch device is installed, two free ends of an internal dental arch are required to be installed on the cheek side of a rear dental area in an intraoral part, however, because the external dental arch device is large in size, the installation difficulty is large in a limited space of a patient oral cavity, especially in the rear dental area, and after the external dental arch device and a shell-shaped dental appliance are fixed only by virtue of two installation positions of the rear dental area, the external dental arch device after the installation can not be fixed in expected positions and directions in clinic, so that the traction direction applied by the external dental arch device deviates from the expected traction direction, and the direction deviation can directly influence the realization of a treatment effect. The split type extraoral bow is provided in the Chinese patent with the application number of CN202322276940.0, so that an extraoral bow device is simply and rapidly installed and disassembled, but the split type extraoral bow is an extraoral bow which needs to be specially customized, the application in clinic is not wide, and the integrated type extraoral bow is widely used or is traditional clinically at present, so that the problem of how to realize convenient installation of the integrated type extraoral bow and can be firmly fixed at the expected position and direction in the mouth after the installation is urgently solved. Based on the above problems, it is important to develop a dental appliance that is easy and quick to install, and can effectively stabilize the extraoral arch device and maintain the traction direction unchanged. Disclosure of utility model The technical problem solved by the utility model is to overcome the defects in the prior art, and provide the dental appliance combining the shell-shaped dental appliance and the external dental appliance, so that the external dental appliance is conveniently and quickly installed, the installed external dental appliance is stable and does not shake, the direction of traction force can be maintained unchanged, and the remote movement of the whole or part of the rear teeth can be efficiently realized. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: A dental appliance comprises a shell-shaped dental appliance for accommodating teeth of a patient and an external dental appliance, wherein a connecting part and a retaining part are arranged on the cheek side of a rear dental area on the left side and the right side of the shell-shaped dental appliance in a protruding way towards the far tooth direction, the retaining part and the connecting part are arranged at a preset distance, the external dental appliance comprises an internal dental appliance body which is positioned in the mouth of the patient and is basically consistent with the arch state, an external dental appliance body which is positioned outside the mouth of the patient and is connected with the internal dental appliance body, the internal dental appliance body comprises a free section connected with the connecting part and a retaining section connected with the retaining part, the free section is connected with the retaining section through a connecting section, the retaining section comprises a containing part and a limiting part which is arranged in an abutting way, the limiting part is provided with a cavity communicated with the containing part, the retaining section is pressed into the containing part along a first direction, the external dental appliance body is connected with the first direction, the inner dental appliance body is connected with the inner dental appliance body through the opening, the free section is pulled out of the first dental appliance body along the first direction, the external dental appliance is pulled into the mouth along the first direction, and the dental appliance is pulled out of the mouth through the first direction, and the dental appliance is pulled into the mouth of the mouth throu