CN214908441U

CN214908441U - Free draw hook

Info

Publication number: CN214908441U
Application number: CN202120340606.5U
Authority: CN
Inventors: 张正权; 邵小军; 焦朝飞; 康盈; 陈杰
Original assignee: Hangzhou Dtc Medical Apparatus Co ltd
Current assignee: Hangzhou Dtc Medical Apparatus Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-30
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to a free draw hook, it includes the traction lever, the one end of traction lever is provided with the traction portion, the other end is provided with the clamping part, utilize the clamping part to come the arch wire in the centre gripping support groove, utilize the traction wire to be connected with the traction portion, behind the traction wire pulling traction portion, can make free draw hook exert pulling force to the arch wire, because support the groove and be the adhesion on the tooth outer wall, under long-time pulling force effect, can change the growth direction of tooth, in order to reach the purpose of correcting tooth, the clamping part forms the contained angle of laminating tooth outer wall arcwall face behind and the traction lever connection, in order to realize the traction lever to the tooth direction slope, utilize the space between lip and the tooth, make clamping part and traction portion can both laminate on the tooth outer wall. The application has the effects of reducing the distance between the traction part and the lips and weakening the foreign body sensation in the oral cavity of a patient.

Description

Free draw hook

Technical Field

The present application relates to the field of dental instruments, and more particularly, to a free draw hook.

Background

The straight wire appliance is a new tooth appliance, also called as a preset appliance, and is used for positioning teeth by brackets, the outer wall of each tooth is adhered with a bracket, and then an arch wire is penetrated on the bracket.

The free draw hook is a common device used for drawing the arch wire in the sliding method of the straight wire arch appliance, and the bracket is bonded on the outer wall of the tooth, so the arch wire can drive the tooth to move after being drawn, one end of the free draw hook is connected with the arch wire, the other end of the free draw hook is connected with the draw wire, and the draw wire is connected with the bracket after being tensioned.

However, since the free hook is directly attached to the arch wire in the mouth of the patient, the free hook is not highly attached to the outer wall of the tooth during the process of pulling the tooth because the free hook is present in the mouth of the patient for a long time, and may be caught by the lips, which may cause a relatively strong foreign body sensation to the patient.

SUMMERY OF THE UTILITY MODEL

In the process of straightening teeth of a patient, in order to weaken the foreign body sensation generated by the patient when the free draw hook pulls the arch wire, the application provides the free draw hook.

The application provides a free towing hook adopts following technical scheme:

the free draw hook comprises a draw bar, wherein one end of the draw bar is provided with a draw part, the other end of the draw bar is provided with a clamping part, and the clamping part is connected with the draw bar to form an included angle of an arc-shaped surface of the outer wall of a fit tooth.

By adopting the technical scheme, the traction rod inclines towards the direction of the teeth, and the clamping part and the traction part can be attached to the outer wall of the teeth by utilizing the gap between the lips and the teeth, so that the distance between the traction part and the lips is reduced, and the foreign body sensation in the oral cavity of a patient is weakened.

Optionally, the clamping part includes first arm lock, second arm lock, support arm and first extension arm, first arm lock with drawbar connection, first arm lock passes through with the second arm lock support arm connection, first extension arm sets up the second arm lock is kept away from one side of support arm, be equipped with between first arm lock and the first arm lock and hold the arch wire extension arm import that the arch wire passes through, first arm lock, second arm lock, support arm and first extension arm have enclosed the arch wire groove that is used for spacing arch wire.

Through adopting above-mentioned technical scheme for during the arch wire entered into the arch wire groove from the arch wire import of clamping part, utilize the contained angle that forms between first extension arm and the second arm lock to catch on the arch wire.

Optionally, an included angle formed between the draw bar and the surface of the first clamping arm ranges from 79 ° to 81 °.

Through adopting above-mentioned technical scheme for free draw hook can be better when using laminate to the tooth outer wall, utilizes the space between lip and tooth, hides free draw hook, weakens the perception of people's lip to free draw hook, weakens the foreign body sensation in the oral cavity on the whole.

Optionally, an included angle between the second clamping arm and the supporting arm is an obtuse angle.

Through adopting above-mentioned technical scheme, can make the contained angle that second arm lock and first extension arm formed littleer, centre gripping arch wire that can be better.

Optionally, the area of the contact surface of the traction rod and the clamping part is larger than that of the contact surface of the traction rod and the clamping part.

Through adopting above-mentioned technical scheme to increase the support stability of traction lever.

Optionally, one side of the first clamping arm, which is far away from the supporting arm, is provided with a second extension arm.

Through adopting above-mentioned technical scheme to increase the area of contact with the tooth when first arm lock butt tooth outer wall, reduce the oppression sense to the tooth.

Optionally, the second extension arm is disposed toward the first extension arm, a surface of the second extension arm facing the tooth is referred to as a first abutting surface, a surface of the traction portion facing the tooth is referred to as a second abutting surface, and the first abutting surface and the second abutting surface are coplanar.

Through adopting above-mentioned technical scheme for first butt face can all be supported to the tooth outer wall with the second butt face on.

Optionally, one surface of the traction part connected with the traction rod is set to be a plane.

Through adopting above-mentioned technical scheme, increase the area of contact of traction wire and traction part for the connection of traction wire and traction part is more firm.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the process of correcting the teeth of the patient, the foreign body sensation generated by the patient when the free traction hook pulls the arch wire can be weakened;

2. the degree of fit with the outer wall of the tooth is increased, and the abrasion to the tooth is reduced.

Drawings

Fig. 1 is a schematic structural view of a free hook according to an embodiment of the present disclosure.

Fig. 2 is a front view of a free hook according to an embodiment of the present application.

Description of reference numerals: 1. a traction part; 11. a second abutting surface; 2. a draw bar; 3. a clamping portion; 31. a first clamp arm; 32. a second clamp arm; 33. a support arm; 34. a first extension arm; 35. a second extension arm; 36. an arch wire inlet; 37. an arch wire groove; 38. a first abutting surface.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses free towing hook.

Referring to fig. 1, a free draw hook, including traction lever 2, the one end of traction lever 2 is provided with traction part 1, and the other end is provided with clamping part 3, utilizes clamping part 3 to come the arch wire of centre gripping support groove, utilizes the haulage wire to be connected with traction part 1, behind haulage wire pulling traction part 1, can make free draw hook exert pulling force to the arch wire, because the support groove is the adhesion on the tooth outer wall, under long-time pulling force effect, can change the growth direction of tooth to reach the purpose of correcting the tooth.

Referring to fig. 1, the clamping portion 3 of the free towing hook includes a first clamping arm 31 connected to the towing bar 2, and in order to increase the supporting stability of the towing bar 2, the area of the contact surface of the towing bar 2 with the first clamping arm 31 is larger than the area of the contact surface with the towing portion 1, that is, the towing bar 2 is gradually thicker from the towing portion 1 to the clamping portion 3.

The plane is arranged on the surface, connected with the traction part 2, of the traction part 1, the contact area of the traction wire and the traction part 1 is increased, the connection between the traction wire and the traction part 1 can be firmer, the top of the traction part 1 is subjected to chamfering treatment, the top of the traction part 1 is smoother, and the abrasion of the teeth caused by scraping and rubbing when the traction part 1 is in contact with the outer walls of the teeth is reduced.

Referring to fig. 1 and 2, in order to make the free hook better fit to the outer wall of the tooth when in use, the traction rod 2 is inclined, so that the axis of the traction rod 2 forms an included angle of 80 degrees with the surface of the first clamping arm 31.

The free draw hook can be hidden by utilizing the gap between the lips and the teeth, so that the perception of the lips of a person on the free draw hook is weakened, and the foreign body sensation in the oral cavity is weakened on the whole.

Referring to fig. 1, the clamping portion 3 of the free towing hook further includes a second clamping arm 32 and a supporting arm 33 for connecting the first clamping arm 31 and the second clamping arm 32, a first extension arm 34 is disposed on one side of the second clamping arm 32 away from the supporting arm 33, a second extension arm 35 is disposed on one side of the first clamping arm 31 away from the supporting arm 33, a contact area with teeth can be increased when the first clamping arm 31 abuts against the outer wall of the teeth, a compression feeling on the teeth is reduced, an arch wire inlet 36 for an arch wire to pass through is reserved between the first extension arm 34 and the second extension arm 35, and an arch wire slot 37 for limiting the arch wire is defined by the first clamping arm 31, the second clamping arm 32, the supporting arm 33, the first extension arm 34 and the second extension arm 35.

Referring to fig. 1, the second extension arm 35 is disposed toward the first extension arm 34, a surface of the second extension arm 35 facing the teeth is referred to as a first contact surface 38, a surface of the traction portion 1 facing the teeth is referred to as a second contact surface 11, the first contact surface 38 is coplanar with the second contact surface 11, and the first extension arm 34 does not extend beyond a spreading surface of the first contact surface 38.

Just after the traction rod 2 is obliquely arranged towards the tooth direction, the first abutting surface 38 and the second abutting surface 11 can abut against the outer wall of the tooth, so that the contact surface of the free traction hook and the tooth is increased, and the free traction hook cannot be displaced or even fall off due to lack of a support point after being pulled by a traction wire.

Referring to fig. 1, since the extending end of the first extension arm 34 cannot exceed the extending surface of the first abutting surface 38, the included angle between the second clamping arm 32 and the supporting arm 33 is set to be an obtuse angle, when the first extension arm 34 and the second clamping arm 32 form the same angle, the first extension arm 34 can be made as long as possible without changing the length of the second clamping arm 32, when an arch wire enters the arch wire slot 37 from the arch wire inlet 36 of the clamping portion 3, the arch wire can be better clamped by using the included angle formed between the first extension arm 34 and the second clamping arm 32, and after the arch wire is clamped, the arch wire is not easy to unhook under the condition that the free towing hook is tightened.

The implementation principle of the free draw hook in the embodiment of the application is as follows: free draw hook's clamping part 3 forms the contained angle of laminating tooth outer wall arcwall face after being connected with traction lever 2 to realize that traction lever 2 inclines to the tooth direction, utilize the space between lip and the tooth, make clamping part 3 and traction part 1 can both laminate to the tooth outer wall, reduce the distance of traction part 1 and lip, weaken the foreign body sensation in the patient oral cavity.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A free draw hook which is characterized in that: the tooth-gluing device is characterized by comprising a traction rod (2), wherein a traction part (1) is arranged at one end of the traction rod (2), a clamping part (3) is arranged at the other end of the traction rod, and the clamping part (3) and the traction rod (2) are connected to form an included angle of an arc-shaped surface of the outer wall of a gluing tooth.

2. A free draw hook according to claim 1, wherein: the clamping part (3) comprises a first clamping arm (31), a second clamping arm (32), a supporting arm (33) and a first extending arm (34), the first clamping arm (31) is connected with the traction rod (2), the first clamping arm (31) is connected with the second clamping arm (32) through the supporting arm (33), the first extending arm (34) is arranged on one side, away from the second clamping arm (32), of the supporting arm (33), an arch wire inlet (36) through which an arch wire passes is arranged between the first clamping arm (31) and the first extending arm (34), and an arch wire groove (37) used for limiting the arch wire is defined by the first clamping arm (31), the second clamping arm (32), the supporting arm (33) and the first extending arm (34).

3. A free draw hook according to claim 2, wherein: the included angle formed by the traction rod (2) and the surface of the first clamping arm (31) ranges from 79 degrees to 81 degrees.

4. A free draw hook according to claim 2, wherein: and an included angle between the second clamping arm (32) and the supporting arm (33) is an obtuse angle.

5. A free draw hook according to claim 2, wherein: the area of the contact surface of the traction rod (2) and the clamping part (3) is larger than that of the contact surface of the traction rod and the traction part (1).

6. A free draw hook according to claim 2, wherein: one side of the first clamping arm (31) far away from the supporting arm (33) is provided with a second extension arm (35).

7. A free draw hook according to claim 6, wherein: the second extension arm (35) is arranged towards the first extension arm (34), one surface of the second extension arm (35) facing the teeth is called a first abutting surface (38), one surface of the traction part (1) facing the teeth is called a second abutting surface (11), and the first abutting surface (38) and the second abutting surface (11) are coplanar.

8. A free draw hook according to claim 1, wherein: one surface of the traction part (1) connected with the traction rod (2) is a plane.