CN201022751Y

CN201022751Y - Free tow hook with L-shaped wedge pressure part used for oral orthodontics

Info

Publication number: CN201022751Y
Application number: CNU2007200510813U
Authority: CN
Inventors: 钟小龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-02-20
Anticipated expiration: 2017-04-30

Abstract

A orthodontic free draw hook with an L-shape wedge pressure part is provided, which belongs to a traction device of the fixed orthodontic appliance. The purpose of the utility model is to solve the slipping phenomenon of the present draw hook and to fix the draw hook on the arc wire firmly. The draw hook is fixed on the arc wire firmly by the wedge ramp mechanism. The utility model includes a retainer (6) and a hook column (5). The retainer has a via hole or an opening via hole (7). The hook column is fixed on the retainer. The utility model is characterized in the L-shaped wedge pressure part. The part has a vertical plane (8) and an inclined plane (9). The large end of the inclined plane (9) is intersected with the vertical plane (8). The inclined plane is inserted into the space between the arc wire and the opening via hole of the hook body. The vertical plane is crossed on the hook column and fixed. The utility model achieves the purpose of fixing the draw hook on the arc wire by wedge ramp principle and has a simple structure, convenient and reliable utilization, low production cost, and is easy to popularization.

Description

The free hook that a kind of mouth cavity orthodontic that " L " shape wedge casting die arranged is used

Technical field:

The free hook that a kind of mouth cavity orthodontic that " L " shape wedge casting die arranged is used belongs to the traction apparatus of mouth cavity orthodontic fixed appliance, is applicable to that the traction arch wire moves, and moves thereby drive tooth, to reach the purpose of straightening of teeth.

Background technology:

Tooth jaws such as tooth arrangement is irregular, tooth dislocation, Upper Anterior Teeth prolapse, mandibular retrusion are common oral disease unusually, and it influences tooth jaw masticatory function, jaw face appearance and pronunciation.Mouth cavity orthodontic is a kind of technology of straightening of teeth, and fixed appliance is the most frequently used device of straightening of teeth.Hook is the traction apparatus of fixed appliance, is attached on the arch wire of fixed appliance.In the orthodontics process, to use elastomeric material (as spring, rubber chain an etc.) end and be fixed in the anchorage tooth, the other end is fixed in hook, makes arch wire be pulled the hook traction and moves, and moves thereby drive tooth, to reach the purpose of straightening of teeth.Hook requires must be anchored on the arch wire of appliance, can not slide, otherwise not reach the purpose that the traction arch wire moves.The hook of fixed appliance mainly is divided into two kinds at present, and a kind of is the integral type hook, and it directly is welded on the arch wire.Another kind of is free hook, and it is placed on the appliance arch wire where necessary as a kind of accessory, and its advantage is to lay at any time, locate arbitrarily, and is easy to use, is current main stream approach.

Present a kind of free hook is formed (Fig. 1) by retainer and hook post, and retainer has through hole or open hole, shape such as box or box structure, and the hook post is fixed on the retainer.The method of itself and arch wire maintenance is to produce deformation with special-purpose pliers compressing box or box-shaped retainer, makes it to clamp arch wire, and frictionally is seated on the arch wire.But find that in clinical practice this maintenance power is quite limited, hook is easy to slide on arch wire, thereby affects the treatment.This utility model has been done improvement to this.

Summary of the invention:

The utility model proposes the free hook that a kind of mouth cavity orthodontic that " L " shape wedge casting die arranged is used, its objective is the sliding phenomenon that overcomes existing hook, hook can be securely fixed on the arch wire, to reach good orthodontics effect.

The technical solution of the utility model is with wedging mechanism hook and arch wire to be fixed.

The free hook that a kind of mouth cavity orthodontic that " L " shape wedge casting die arranged is used, comprise retainer and hook post, the hook post is fixed on the retainer, retainer has through hole or open hole, it is characterized in that having " L " shape wedge casting die, this part is faced directly and the inclined-plane, the big end on inclined-plane with face directly crossing, the inclined-plane injects gap and the wedging arch wire between arch wire and the maintenance body opening, faces directly on the hook post.

This utility model utilizes the wedging principle to reach the purpose that hook is fixed on arch wire, and simple in structure, easy to use and reliable, production cost is low, promotes easily.

Description of drawings:

Fig. 1 is a sketch map before hook uses.

Fig. 2 is that hook is installed and used sketch map.

Fig. 3 is the front view after hook compresses.

Fig. 4 is that hook compresses the back left view.

Fig. 5 is " L " shape wedge casting die front view.

Fig. 6 is the state diagram that the wedge casting die uses on free hook.

Among the figure: tooth 1, rubber ring 2, hook 3, arch wire 4, hook post 5, retainer 6, open hole 7, wedge casting die face 8 directly, wedge casting die inclined-plane 9.

The specific embodiment:

Object lesson explanation this programme that the open hole hook is now arranged with retaining device.

Fig. 6 has shown the free hook assembling relationship figure of " L " shape wedge casting die, and it is made up of wedge casting die and hook, and hook (Fig. 2,3,4) has hook post 5 and retainer 6, and retainer has open hole 7, and the hook post is fixed on the coupler body.Wedge casting die (Fig. 5) faces 8 and inclined-plane 9 directly, the big end on inclined-plane with face directly crossing.During application,, face 8 directly and on the hook post, fix, prevent coming off of wedge casting die, also just stoped the slip of arch wire gap and the wedging arch wire 4 (Fig. 6,7) that inclined-plane 9 injects between arch wire and the retainer open hole 7.

Fig. 2 has shown free hook application state figure.The fixed-site of hook on arch wire got well, and just can be fixed on rubber ring 2 on the hook post, utilizes the elastic traction tooth of rubber ring to move.

Example utilizes " L " shape wedge casting die wedging principle to reach the purpose that hook is fixed on arch wire, and it is simple in structure, and is easy to use and reliable, and production cost is low, promotes easily.

Claims

1. free hook that the mouth cavity orthodontic that " L " shape wedge casting die arranged is used, comprise retainer (6) and hook post (5), retainer has through hole or open hole (7), the hook post is fixed on the retainer, it is characterized in that having " L " shape wedge casting die, this part is faced (8) and inclined-plane (9) directly, the big end of inclined-plane (9) with face (8) directly and intersect, the inclined-plane injects gap and wedging arch wire (4) between arch wire and the coupler body open hole, faces directly on the hook post and fixes.