CN110811878A

CN110811878A - Orthodontic traction device

Info

Publication number: CN110811878A
Application number: CN201911186602.XA
Authority: CN
Inventors: 辛欣
Original assignee: Affiliated Hospital of Chifeng University
Current assignee: Affiliated Hospital of Chifeng University
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-21
Anticipated expiration: 2039-11-28
Also published as: CN110811878B

Abstract

An orthodontic traction device comprises a fixing plate, an arch wire and a bracket, wherein the fixing plate comprises a fixing area, an extension arm and a traction hook, the fixing area is connected with the traction hook through the extension arm, and the bracket is connected to the arch wire; the arch wire comprises a front tooth area and a rear tooth area, the front tooth area is arranged in the middle of the arch wire, the rear tooth area is arranged at two ends of the front tooth area, and traction pieces matched with the traction hooks are arranged at two ends of the arch wire and close to the bracket.

Description

Orthodontic traction device

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to an orthodontic traction device.

Background

Common maxillary hypoplasia correction methods include functional correction FR-III, anterior traction and the like. The traditional maxillary anterior traction device is formed by combining an intraoral anchorage and an oral external mask. The forms of intra-oral anchorage are diverse: base, belt, cast and modified isotatic anchorage.

The dental anchorage effects changes in the maxilla and causes adverse tooth movement, upper anterior labial inclination, maxillary molar elongation, anterior movement, etc. The anchorage which can be provided by the teeth is limited, the traction effect is restricted, the anchorage is lost due to the excessive traction force loading, and the suture osteogenesis cannot be stimulated due to the insufficient traction force

At present, the temporary implant nail is widely applied to clinical treatment due to the advantages of minimally invasive implantation, simple removal process, convenience for clinical operation of orthodontists and the like, the implant nail can be used for adduction of anterior teeth, pushing and grinding of posterior teeth, depression of posterior teeth, closing of tooth extraction gaps, front traction and the like, the bone anchorage mode does not need teeth to provide indirect acting force, the defect that teeth of the traditional intraoral anchorage are not moved is well overcome, and absolute anchorage is achieved.

But the anchorage of the planting nail has certain defects, the success rate is 37% -94%, the stability is not ideal enough, and the causes of loosening and falling of the planting nail are more: the steel pipe is easy to fall off or break off when bearing larger acting force; because the oral hygiene condition of a patient is uncontrollable, soft scale and bacterial plaque are accumulated on the patient with poor compliance, soft tissues around the implant nail swell, and the nail head is embedded in the soft tissues, so that peri-implant inflammation can be caused, and serious patients can cause cellulitis; the bone cortex at the neck of the implant is absorbed to cause the implant to be loosened easily, and the implantation position of the implantation nail is limited after the implant falls off.

Disclosure of Invention

The invention aims to solve the problems in the background technology and provide an orthodontic traction device which has strong tolerance, avoids infection and can be absorbed by human bodies.

The purpose of the invention is realized as follows:

the utility model provides an orthodontic draw gear, includes fixed plate, arch wire and holds in the palm the groove, the fixed plate includes fixed zone, extension arm and draws the hook, the fixed zone is connected through the extension arm and is drawn the hook, hold in the palm the groove and connect on the arch wire, the both ends of arch wire, be close to hold in the palm the groove department and all establish the piece that draws with drawing hook looks adaptation.

Further, the fixed plate is the integrated into one piece structure, the fixed area of fixed plate is "V" type structure, the through-hole is all established to "V" type three-terminal department of fixed area, fixed area and extension arm are "Y" type structure.

Furthermore, the fixing plate is made of a micro titanium plate, the thickness of the fixing plate is 0.5-1mm, the width of the fixing plate is 2-5mm, and the diameter of the through hole is 1-3 mm.

Furthermore, the arch wire comprises a front tooth area and a rear tooth area, the front tooth area is arranged in the middle of the arch wire, and the rear tooth area is arranged at two ends of the front tooth area.

Furthermore, the bracket is arranged in the front tooth area of the arch wire, and the traction piece is arranged on the arch wire of the rear tooth area close to the front tooth area.

Furthermore, the silk diameter of the anterior tooth area is 0.3-0.6mm, and the silk diameter of the posterior tooth area is 0.6-1 mm.

Furthermore, the fixing plate is connected to the maxilla through the titanium nail and the through hole, wherein the fixing area is arranged at the zygomatic crest, and the traction hook is arranged at the tooth root of the maxillary canine.

Further, the lower edge of the fixing area of the fixing plate is 5-8mm higher than the crest of the alveolar ridge.

Further, the elastic modulus F1 of the fixing plate is 1.98 x 10⁵-2.08×10⁵The Poisson ratio upsilon of the fixed plate is 0.3-0.5, the stress F2 of the fixed plate is 18.6-33.5MPa, and F1. F2 is more than or equal to 3948620 and less than or equal to 6745600.

Furthermore, a turning area is formed at the connecting position of the extension arm and the traction hook of the fixing plate, and the surface tension of the turning area meets the following requirements:

wherein S is the cross-sectional area of the fixed plate, α represents the included angle between the traction angle of the fixed plate and the plane, and α is more than or equal to 0 degree and less than or equal to 70 degrees.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention provides an orthodontic traction device, wherein a fixing plate is connected to a maxilla through a titanium nail, a buccal tube is fixed on the labial and buccal surfaces of molar teeth, a front tooth area of a reducing orthodontic tooth arch wire is arranged in a groove of an orthodontic bracket, the far end of a rear tooth area is connected with a molar area, and the fixing plate pulls a traction piece of the arch wire through a traction hook, so that traction on the arch wire is formed, and forward traction on the maxilla is promoted.

2. According to the orthodontic traction device provided by the invention, the fixing plate is made of the micro titanium plate and is fixed by the three titanium nails, so that more stable anchorage can be provided, under the action of traction forces at different angles, regions with larger stress on a fixing region and a traction region of the fixing plate are concentrated in a turning region, the surface tension load born in a unit area is smaller, no obvious over-stress region appears, and the durability of the fixing plate is improved.

3. According to the orthodontic traction device provided by the invention, the anterior tooth area of the variable-diameter orthodontic tooth arch wire is arranged in the groove of the orthodontic bracket, and the anterior tooth area of the arch wire is thinner and can be placed in the groove of the orthodontic bracket of the anterior tooth, so that the anterior tooth can be retracted while the upper jaw molar is pushed backwards.

Drawings

Fig. 1 is a schematic structural view of an orthodontic traction device of the invention.

Fig. 2 is a schematic view of a fixing plate of the orthodontic traction device structure.

FIG. 3 is a schematic view of an arch wire of an orthodontic traction device structure of the invention

Fig. 4 is a schematic view of an orthodontic lead of the invention in use.

In the figure: 1. a fixing plate; 11. a fixed zone; 12. a through hole; 13. an extension arm; 14. a towing hook; 2. an arch wire; 21. an anterior tooth zone; 22. a posterior dental region; 23. a traction member; 3. a bracket; 4. titanium nails.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-2, an orthodontic traction device comprises a fixing plate 1, an archwire 2 and a bracket 3, wherein the fixing plate 1 comprises a fixing area 11, an extension arm 13 and a traction hook 14, the fixing area 11 is connected with the traction hook 14 through the extension arm 13, the bracket 3 is connected to the archwire 2, traction pieces 23 matched with the traction hook 14 are arranged at two ends of the archwire 2 and near the bracket 3, and the fixing plate is connected with the archwire 2 through the traction hook 14 and the traction pieces 23.

Example 2

Combine figure 1, fixed plate 1 is the integrated into one piece structure, fixed plate 1's fixed area 11 is "V" type structure, through-hole 12 is all established at fixed area 11 "V" type three-end department, fixed area 11 and extension arm 13 are "Y" type structure, fixed plate 1 adopts little titanium plate material, the thickness of fixed plate 1 is 0.8mm, the width of fixed plate 1 is 4mm, the diameter of through-hole 12 is 2 mm.

The fixing area 11 is fixed by three titanium nails 4 with the length of 8mm, and is divided into an upper end, a far-middle end and a turning part, the upper end, the far-middle end and the turning part are positioned at the zygomatic crest, the traction hook is positioned at the tooth root of the maxillary canine, the extension arm can extend to the traction hook along the long axis direction of the canine after being parallel to the plane to the apical of the canine, and can also extend to the traction hook directly and be horizontal with the apical of the canine trough, or positioned on the angular bisector of the far-middle end and the turning part and is turned to the traction hook along the long axis of the canine.

Example 3

With reference to fig. 1 and 3, the archwire 2 includes a front tooth zone 21 and a rear tooth zone 22, the front tooth zone 21 is disposed in the middle of the archwire 2, the rear tooth zone 22 is disposed at both ends of the front tooth zone 21, the bracket 3 is disposed in the front tooth zone 21 of the archwire 2, the pulling member 23 is disposed on the archwire 2 of the rear tooth zone 22 close to the front tooth zone 21, the wire diameter of the front tooth zone 21 is 0.5mm, and the wire diameter of the rear tooth zone 22 is 0.8 mm.

The anterior tooth zone 21 of the orthodontic tooth arch wire 2 with the variable diameter is arranged in a groove of the orthodontic bracket 3, the anterior tooth zone 21 of the arch wire 2 is thin and can be placed into the orthodontic bracket groove of the anterior tooth, the wire diameter of the posterior tooth zone is thicker than that of the anterior tooth zone, and the posterior tooth zone extends backwards to the molar zone for fixation, so that the anterior tooth can be adducted when the molar tooth of the upper jaw is pushed backwards.

Example 4

With reference to fig. 4, the orthodontic traction device comprises a fixing plate 1, an arch wire 2 and a bracket 3, wherein the fixing plate 1 comprises a fixing area 11, an extension arm 13 and a traction hook 14, the fixing area 11 is connected with the traction hook 14 through the extension arm 13, the bracket 3 is connected to the arch wire 2, traction pieces 23 matched with the traction hook 14 are arranged at two ends of the arch wire 2 and positions close to the bracket 3, and the fixing plate is connected with the arch wire 2 through the traction hook 14 and the traction pieces 23.

Fixed plate 1 is the integrated into one piece structure, fixed plate 1's fixed area 11 is "V" type structure, through-hole 12 is all established at fixed area 11 "V" type three-end department, fixed area 11 and extension arm 13 are "Y" type structure, fixed plate 1 adopts little titanium plate material, fixed plate 1's thickness is 0.8mm, fixed plate 1's width is 4mm, the diameter of through-hole 12 is 2mm, and fixed plate 1's fixed area 11's lower edge is higher than alveolar ridge top 6 mm.

The arch wire 2 comprises a front tooth area 21 and a rear tooth area 22, the front tooth area 21 is arranged in the middle of the arch wire 2, the rear tooth area 22 is arranged at two ends of the front tooth area 21, the bracket 3 is arranged in the front tooth area 21 of the arch wire 2, the traction piece 23 is arranged on the arch wire 2 of the rear tooth area 22 close to the front tooth area 21, the arch wire is connected to a molar area through the end head of the rear tooth area 21, the wire diameter of the front tooth area 21 is 0.5mm, and the wire diameter of the rear tooth area 22 is 0.8 mm.

Example 5

Fixed plate 1 includes fixed zone 11, extension arm 13 and towing hook 14, fixed zone 11 connects towing hook 14 through extension arm 13, the fixed plate adopts little titanium plate material, the fixed plate thickness is 0.8mm, the width of fixed plate is 4mm, the diameter of through-hole is 2mm, the elastic modulus F1 of fixed plate is 2.06 x 10⁵And MPa, and the Poisson ratio upsilon of the fixed plate is 0.35.

The extension arm and the draw hook junction of fixed plate form the turn district, the surface tension in turn district satisfies:

wherein S is the cross-sectional area of the fixed plate, α represents the included angle between the traction angle of the fixed plate and the plane, 0- α -70 °

500g of lateral force is applied to the traction hook, the traction point is forward and downward, the included angle between the traction point and the upper jaw plane is 0-50 degrees, when traction is carried out in different directions under the same force value, the stress distribution is basically uniform, the stress is averagely within the range of 19.6-32.5MPa, and the stress concentration phenomenon does not occur.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and substitutions made within the scope of the present invention should be included.

Claims

1. An orthodontic traction device, characterized in that: the arch wire fixing plate comprises a fixing plate (1), an arch wire (2) and a bracket (3), wherein the fixing plate (1) comprises a fixing area (11), an extension arm (13) and a traction hook (14), the fixing area (11) is connected with the traction hook (14) through the extension arm (13), and the bracket (3) is connected to the arch wire (2);

the arch wire (2) comprises a front tooth area (21) and a rear tooth area (22), the front tooth area (21) is arranged in the middle of the arch wire (2), the rear tooth area (22) is arranged at two ends of the front tooth area (21), and traction pieces (23) matched with the traction hooks (14) are arranged at two ends of the arch wire (2) and close to the bracket (3).

2. The orthodontic traction device of claim 1, wherein: fixed plate (1) is the integrated into one piece structure, fixed area (11) of fixed plate (1) are "V" type structure, through-hole (12) are all established to "V" type three-end department of fixed area (11), fixed area (11) and extension arm (13) are "Y" type structure.

3. The orthodontic traction device of claim 2, wherein: the fixing plate (1) is made of a micro titanium plate, the thickness of the fixing plate (1) is 0.5-1mm, the width of the fixing plate (1) is 2-5mm, and the diameter of the through hole (12) is 1-3 mm.

4. The orthodontic traction device of claim 1, wherein: the fixing plate (1) is connected to a maxilla through a titanium nail (4) and a through hole (12), the fixing area (11) is arranged at a zygomatic alveolar ridge, and the traction hook (14) is positioned at a maxillary canine tooth root.

5. The orthodontic traction device of claim 1, wherein: the lower edge of the fixing area (11) of the fixing plate (1) is 5-8mm higher than the crest of the alveolar ridge.

6. The orthodontic traction device of claim 1, wherein: the bracket (3) is arranged in a front tooth area (21) of the arch wire (2), and the traction piece (23) is arranged on the arch wire (2) of a rear tooth area (22) close to the front tooth area (21).

7. The orthodontic traction device of claim 1, wherein: the silk diameter of the anterior tooth area (21) is 0.3-0.6mm, and the silk diameter of the posterior tooth area (22) is 0.6-1 mm.