CN203988438U

CN203988438U - A kind of bracket

Info

Publication number: CN203988438U
Application number: CN201420482723.5U
Authority: CN
Inventors: 朱敬一; 赖文莉
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-08-25
Filing date: 2014-08-25
Publication date: 2014-12-10
Anticipated expiration: 2024-08-25

Abstract

The utility model discloses a kind of bracket, comprise supporter groove and base plate, supporter groove is provided with the wing and groove, and described supporter groove bottom is slidably connected by spherical guide and base plate top, and the glide direction of described supporter groove is corresponding with the bearing of trend of groove.The technical program replaces the sliding friction between original stainless steel silk and bracket with rolling friction, has reduced frictional force, the more important thing is, needn't loosen in order to reduce friction the control action to tooth three-dimensional.

Description

A kind of bracket

Technical field

This utility model belongs to dental orthodontic technical field, relates in particular to a kind of bracket.

Background technology

When exodontia is rescued (conventionally pulling out first bicuspid), at the most frequently used sliding scale of the stage of closing extraction of tooth space.With hard Rectangular SS archwires, provide guide rail, the power of spring or elastic tape is carried on tooth, and bracket and tooth slide on rustless steel guide rail.Lay for convenience, the cross section of square wire must be slightly smaller than bracket groove cross section.

When sliding, produced force of sliding friction.The spring that loaded or the pulling force of elastic tape will deduct frictional force and be only the power being carried on tooth.One simply formula its relation is described: the tensile force f of the tensile force f that tooth is subject to=apply '-frictional force f.In classical planing theory, frictional force f=μ N.μ depends on the surface condition of square stainless steel silk and bracket complexity.N depends on the tightness of ligation closely related (ligation is tighter, and normal pressure is larger).This cannot accurately determine frictional force clinically, and quite large.Thereby the pulling force loaded value of spring or elastic tape cannot provide accurate reference, doctor often judges according to own experience.This problem had been taken seriously when the seventies, sliding scale occurred, for sort this problem out, had occurred a lot of schemes:

1. improve stainless steel silk and bracket inner surface fineness, case hardness reduces μ.This is that most of producers are doing.

2. doctor's untwisting is pricked, or untwisting is pricked bracket.Between steel wire and bracket, ligation power is very little, and side's silk has certain moving degree in groove, to reduce normal pressure N.

3. passive locking bracket.Prick and play the same tune on different musical instruments with untwisting, with slip lid, come shelves to live arch wire and deviate from.Reduce N.As the Damon locking bracket series of ormco company.

4.Tip-edge bracket.This bracket has removed on traditional bracket two of angular direction trianglees, allows tooth to topple over to direction of pull.Reduce N.But topple over, have a strong impact on very much rectifying effect.

5. transmission bracket.Tip-edge and the compromise of common straight silk bow supporting groove, be to reduce normal pressure N equally in essence, just do not allow tooth to topple over too serious.

These schemes are to reduce normal pressure mostly in essence at present, " lighten restrictions on " to arch wire, reach the effect that reduces sliding friction.But the shortcoming of doing is like this apparent,, in straight arch wire system, lost the accurate control of the position of tooth in 3 dimension directions.(due to for the ease of security protection arch wire, the cross section one definite proportion groove of arch wire is little, certainly leads to clearance.Even there is artificially the problem that solves this accurate control to invent Support slot with movable wings.But problem goes out thereupon, sliding is lost serious.

There is now a contradiction: in sliding scale, frictional force and tooth are controlled and had this those long contradictions that disappear.Therefore,, in orthodontic treatment, when closing extraction of tooth space, sliding scale in the situation that of controlling torque, how to solve the excessive and unsettled problem of frictional force most important.

Summary of the invention

In order to solve above-mentioned technical problem, the purpose of this utility model is to provide a kind of bracket, with rolling friction, replaces the sliding friction between original stainless steel silk and bracket, has reduced frictional force, to the more important thing is, needn't to loosen in order reducing friction the control action to tooth three-dimensional.

To achieve the above object, this utility model has adopted following technical scheme:

A bracket, comprises supporter groove and base plate, and supporter groove is provided with the wing and groove, and described supporter groove bottom is slidably connected by spherical guide and base plate top, and the glide direction of described supporter groove is corresponding with the bearing of trend of groove.

As preferably, described spherical guide comprises: be arranged on the guide-track groove on base plate, supporter groove bottom is embedded in guide-track groove, and the bottom of guide-track groove is connected with supporter groove bottom by ball respectively with two side.

Further preferably, the relevant position of described guide-track groove and supporter groove is provided with the ball grooves of arranging ball.

Further preferably, the sliding scale of supporter groove is limited at the two ends of described guide-track groove by limiting section.During correction, the moving range of tooth and bracket is less, and simple and reasonable like this, movement is reliable also can control effectively to tooth.

The structure of guide rail has multiple, but preferably, described guide-track groove is dovetail groove, and described supporter groove bottom is swallowtail shape.

As preferably, above described base plate, both sides are provided with guide wall, form described guide-track groove between two guide wall.

As preferably, described spherical guide is ball line slideway.

This utility model is owing to having adopted above technical scheme, and guide track system can all provide directed rotating direction, and in other direction, gives the control of enough three-dimensionals.This is a desirable orientation force stress model.In sliding scale, introduce spherical guide system, the reference value that the power of rescuing loads can accurately be provided.(modern straight arch wire sliding system is in the clinical research of the suitable power of rescuing, and because not having can be accurately or more accurately provide the device of the required power of rescuing, research is always in bottleneck.Even if the suitableeest power of rescuing tooth moves the soonest and does not occur uncomfortable power, generally believed at present a threshold value, surpass it and can produce infringement, and in it, power more molar moves faster.But occurrence can not given).As fruit product is achieved, bring opportunity will to the research of the suitable power of rescuing, then on the maximum basis of controlling to tooth three-dimensional, by the suitableeest power, moving tooth clinically also becomes possibility.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is made a detailed explanation.

Embodiment 1:

A kind of bracket as shown in Figure 1 and Figure 2, comprise supporter groove 1 and base plate 2, supporter groove 1 is provided with the wing 11 and groove 12, and described supporter groove 1 bottom is slidably connected by spherical guide and base plate 2 tops, and the glide direction of described supporter groove 1 is corresponding with the bearing of trend of groove 12.Described spherical guide comprises: be arranged on the guide-track groove 21 on base plate 2, supporter groove 1 bottom is embedded in guide-track groove 21, and the bottom of guide-track groove 21 is connected with supporter groove 1 bottom by ball 3 respectively with two side.The relevant position of described guide-track groove 21 and supporter groove 1 is provided with the ball grooves of arranging ball 3.The two ends of described guide-track groove 21 are by the sliding scale of limiting section 23 restriction supporter grooves 1.Described guide-track groove 21 is dovetail groove, and described supporter groove 1 bottom is swallowtail shape.Above described base plate 2, both sides are provided with between guide wall 22, two guide wall 22 and form described guide-track groove 21.Described spherical guide is ball line slideway.

In the present embodiment, as shown in Figure 1 and Figure 2, base plate extends two guide wall, all acutangulates with base plate.With the common structure that forms a restricted internal structure lateral displacement and torsion of base plate, internal guide rail wall consists of the outer surface of supporter groove, and outer surface is consistent with the guide wall of base plate, arranges 3-4 row guide rail therebetween, is equipped with ball.

When bracket is bonded on tooth, base plate and tooth are connected as a single entity.When supporter groove and arch wire ligation, they are connected as a single entity.Between two large parts, the guide rail with ball transmits power.When bite plate cell body is subject to power that side direction reverse, guide track system is well delivered to power on tooth and loss hardly.And the power that pulls tooth and base plate that extension spring or elastic tape produce is owing to being to allow the direction of sliding at slide rail, can not produce larger friction, can make active force be reacted to really on tooth, rather than greatly be offset by frictional force.

It is emphasized that: be only preferred embodiment of the present utility model above, not this utility model is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of technical solutions of the utility model.

Claims

1. a bracket, comprise supporter groove (1) and base plate (2), supporter groove (1) is provided with the wing (11) and groove (12), it is characterized in that, described supporter groove (1) bottom is slidably connected by spherical guide and base plate (2) top, and the glide direction of described supporter groove (1) is corresponding with the bearing of trend of groove (12).

2. a kind of bracket according to claim 1, it is characterized in that, described spherical guide comprises: be arranged on the guide-track groove (21) on base plate (2), supporter groove (1) bottom is embedded in guide-track groove (21), and the bottom of guide-track groove (21) is connected with supporter groove (1) bottom by ball (3) respectively with two side.

3. a kind of bracket according to claim 2, is characterized in that, the relevant position of described guide-track groove (21) and supporter groove (1) is provided with the ball grooves of arranging ball (3).

4. a kind of bracket according to claim 2, is characterized in that, the two ends of described guide-track groove (21) are by the sliding scale of limiting section (23) restriction supporter groove (1).

5. a kind of bracket according to claim 2, is characterized in that, described guide-track groove (21) is dovetail groove, and described supporter groove (1) bottom is swallowtail shape.

6. a kind of bracket according to claim 2, is characterized in that, described base plate (2) above both sides is provided with guide wall (22), forms described guide-track groove (21) between two guide wall (22).

7. a kind of bracket according to claim 2, is characterized in that, described spherical guide is ball line slideway.