CN-224206907-U - Dental instrument

CN224206907UCN 224206907 UCN224206907 UCN 224206907UCN-224206907-U

Abstract

The utility model discloses a dental instrument which comprises an anchorage module, a segment-shaped shell body, a first traction part and a second traction part, wherein the first traction part is arranged on the anchorage module, the second traction part is arranged on the segment-shaped shell body or the front teeth, the anchorage module is connected with the teeth of the rear teeth area of a patient in an matched mode and comprises a first retention crown, a second retention crown and a jaw connecting rod, the first retention crown is sleeved and fixed on the first teeth, the second retention crown is sleeved and fixed on the second teeth, the jaw connecting rod binds the first teeth and the second teeth corresponding to the rear teeth area on the left side and the right side into a whole body to form an integral anchorage, the segment-shaped shell body is used for binding the teeth of the front teeth area of the patient into a whole body and comprises a plurality of crown accommodating cavities for wrapping the teeth of the front teeth area of the patient, and an elastic traction piece is hooked between the first traction part and the second traction part so that the teeth of the front teeth area move towards the rear teeth area of the patient to close a rear teeth area when the dental appliance is worn.

Inventors

WAN YI
Ding Xingdou
WANG XINGXING
ZHUANG HUIMIN
YAO JUNFENG

Assignees

正雅齿科科技(上海)有限公司

Dates

Publication Date: 20260508
Application Date: 20250430

Claims (10)

1. A dental instrument, comprising: The support and antigen module is connected to the teeth in the rear teeth area of the patient and comprises a first retention crown connected to the rear teeth area of the left side of the patient, a second retention crown connected to the rear teeth area of the right side of the patient and a jaw connecting rod connected between the first retention crown and the second retention crown, wherein the first retention crown comprises a first retention part wrapping at least one first tooth in the rear teeth area of the left side, the inner contour of the first retention part is matched with the outer contour of the first tooth, the first retention part comprises a first occlusal part which is arranged corresponding to the occlusal surface of the first tooth and is consistent with the shape of the occlusal surface, the first occlusal part is provided with a first through hole for the tooth tip to pass through at the corresponding first tooth tip, the second retention crown comprises a second retention part wrapping at least one second tooth in the rear teeth area of the right side, the inner contour of the second retention part is matched with the outer contour of the second tooth, the inner contour of the second retention part is matched with the second contour of the second tooth, the second occlusal surface is formed by the second through hole corresponding to the second tooth tip, and the second occlusal surface is integrally formed with the second tooth set at the second tooth tip, and the second through hole is integrally formed at the second tooth tip is formed; the sectional shell-shaped body is used for binding the teeth of the front teeth area of the patient into a whole and comprises a plurality of crown accommodating cavities for wrapping the teeth of the front teeth area of the patient; The first traction part is arranged on the anchorage module; The second traction part is matched with the first traction part to hook an elastic traction piece, and the second traction part is arranged on the dental crown accommodating cavity or the front teeth area teeth; When the tooth extractor is worn, the two ends of the elastic traction piece are respectively hooked on the first traction part and the second traction part, so that sagittal and backward traction force is applied to the segmented shell-shaped body and the front teeth area teeth wrapped by the segmented shell-shaped body, and the front teeth area teeth move towards the rear teeth area to close gaps generated after tooth extraction.
2. The dental instrument of claim 1, wherein the first pulling portion is disposed on a buccal side of the first or second retention portion and the second pulling portion is disposed on a buccal side of the segmented shell body or the anterior teeth, or wherein the first pulling portion is disposed on a lingual side of the first or second retention portion and the second pulling portion is disposed on a lingual side of the segmented shell body or the anterior teeth.
3. The dental instrument of claim 1, wherein the first pulling portion is disposed on a side of the palate connecting rod facing toward an anterior dental region and the second pulling portion is disposed on a lingual side of the segmented shell body or the anterior dental region teeth.
4. The dental instrument of claim 1, wherein the second pulling portion is disposed on the anterior teeth, and wherein the segmented shell body is provided with an opening structure at a location corresponding to the second pulling portion, or wherein the second pulling portion is configured to be positioned between the anterior teeth, The second traction part is arranged on the segment-shaped shell body, the segment-shaped shell body is correspondingly provided with a mounting platform for mounting the second traction part, the mounting platform is formed by projecting the surface of the segment-shaped shell body to the far tooth direction, or, The second traction part and the segmented shell-shaped body are of an integrated structure.
5. The dental instrument of claim 1, wherein the number of second pull portions is an even number, wherein the even number of second pull portions are symmetrically disposed about a midline of the tooth.
6. The dental instrument of claim 1, wherein the stiffness of the palate connecting rod is such that the first and second retention crowns connected to the left and right sides of the palate connecting rod can maintain relative positions under the reactive force of the traction force.
7. The dental instrument of any of claims 1-6, wherein the palate connecting rod has a material elastic modulus of greater than 150GPa and less than or equal to 400GPa.
8. The dental instrument of claim 7, wherein the palate connecting rod has a circular cross-section and the palate connecting rod has a cross-section diameter of 1.5mm-5mm.
9. The dental instrument of any of claims 1-6, wherein the palatal connection rod is generally arched toward the palate, and wherein a side of the palatal connection rod facing the palate and the palate of the patient are vertically disposed with a gap, wherein the gap ranges from greater than 0mm to less than or equal to 10mm.
10. The dental instrument of claim 1, wherein the first retention crown, the second retention crown, and the palate connecting rod are an integrally formed structure, fabricated by a casting process or a 3D printing process.

Description

Dental instrument Technical Field The present utility model relates to the field of medical devices, more precisely to the field of oral appliances, and in particular to a dental device. Background In the field of orthodontic treatment, tooth extraction is an important treatment means. However, closure of gap G (as shown in fig. 1) after tooth extraction (e.g., symmetric extraction of 4 teeth) and how to control the anchorage of the posterior teeth during anterior tooth movement when closing the gap has been a research focus in the correction. In particular, for invisible correction, as the correction principle is that the orthodontic force on teeth is applied through elastic deformation of an elastic material, the movement amount of each step is small, if only a single-layer diaphragm of an invisible appliance is used for adducting front teeth and closing gaps, a plurality of invisible appliances are usually needed to gradually finish the adduction effect of the front teeth, the needed period is long, the adduction effect is not ideal, and the applicant finds that in clinic, a rear tooth area is often damaged due to the fact that rear teeth on the left side and the right side cannot be stably used as anchorage, the anchorage is easily damaged by the reaction force of the movement of the front teeth, thereby bringing adverse effects of the forward movement or the inclination of the rear teeth, which finally indirectly aggravate the risk of the movement out of control of the front teeth, further correcting failure, and further spending more time for righting the tooth axes and continuing to close the gaps, increasing difficulty and wasting time and labor. For example, in chinese patent application No. cn202320173405.X, a dental orthodontic apparatus is provided to straighten the posterior teeth inclined to the gap due to insufficient posterior tooth anchorage, but this is a "remedy" after failure of correction, which clearly prolongs the overall correction period of the patient, so that the efficiency of anterior tooth adduction is low during closing of the gap. Therefore, aiming at how to strengthen the anchorage of the rear teeth and improve the realization efficiency of the adduction of the front teeth in the process of closing the gap in the tooth extraction case, the method has important significance. Disclosure of utility model The utility model solves the technical problems of overcoming the defects in the prior art, and provides the dental instrument capable of effectively closing the tooth gap, enhancing the overall anchorage of the rear teeth in the process of the retraction of the teeth in the front teeth area, realizing the overall retraction of the teeth in the front teeth area and effectively improving the correction efficiency. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: A dental instrument comprises an anchorage module, a segment-shaped shell body, a first traction part and a second traction part; The support and antigen module is connected to the teeth in the rear teeth area of the patient and comprises a first retention crown connected to the rear teeth area of the left side of the patient, a second retention crown connected to the rear teeth area of the right side of the patient and a jaw connecting rod connected between the first retention crown and the second retention crown, wherein the first retention crown comprises a first retention part wrapping at least one first tooth in the rear teeth area of the left side, the inner contour of the first retention part is matched with the outer contour of the first tooth, the first retention part comprises a first occlusal part which is arranged corresponding to the occlusal surface of the first tooth and is consistent with the shape of the occlusal surface, the first occlusal part is provided with a first through hole for the tooth tip to pass through at the corresponding first tooth tip, the second retention crown comprises a second retention part wrapping at least one second tooth in the rear teeth area of the right side, the inner contour of the second retention part is matched with the outer contour of the second tooth, the inner contour of the second retention part is matched with the second contour of the second tooth, the second occlusal surface is formed by the second through hole corresponding to the second tooth tip, and the second occlusal surface is integrally formed with the second tooth set at the second tooth tip, and the second through hole is integrally formed at the second tooth tip is formed; the sectional shell-shaped body is used for binding the teeth of the front teeth area of the patient into a whole and comprises a plurality of crown accommodating cavities for wrapping the teeth of the front teeth area of the patient; The first traction part is arranged on the anchorage module; The second traction part is matched with the first traction part to hook an elastic tr