JP2002102256A - Transfer device for bracket in orthodontic indirect bonding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the usability of a transfer device for bracket in orthodontic indirect bonding. SOLUTION: In this transfer device, a stopper 41 having a tendency of always projecting inward a support tube 23 is arranged support tube 23 such that the stopper 41 can freely move inward/outward and in a slide arm 27, a first cutout part 43 and a second cutout part 45 corresponding to the stopper 41 are formed. When the stopper 41 fits into the first cutout part 43, a face 33a of the bracket 33 facing a tooth surface is coated with an adhesive 39. When the stopper 41 fits in the second cutout part 45, the bracket 33 is brought into pressure- contact with the tooth surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transferring brackets in indirect bonding of orthodontics, and more particularly, to a method for determining a position on a tooth surface of a working model in indirect bonding of orthodontics. The present invention relates to a transfer device for transferring a bracket to a corresponding tooth surface of a patient. The bracket includes means for retaining the archwire. Incidentally, the method of directly fixing the bracket to the tooth surface of the patient is called direct bonding.

[0002]

2. Description of the Related Art As a bracket transfer device in orthodontic indirect bonding, those shown in FIGS. 10 and 11 have been conventionally used. This transfer device (hereinafter, referred to as “conventional transfer device (a)”) forms a working model that accurately duplicates a patient's teeth with gypsum or the like, and a predetermined position on the tooth surface of the working model. By temporarily fixing the bottom surface 1a of the bracket 1 to the surface of the working model and covering the teeth of the working model with an impression material such as silicone, the bottom surface 1a of the bracket 1 is exposed on the inner surface while having a shape corresponding to the teeth of the patient. Section U
When the bracket 1 is transferred to the corresponding tooth surface of the patient, an adhesive is applied to the bottom surface 1a of the bracket 1 to form a substantially U-shaped cross section. The tray 3 is removed after fitting the bracket 1 to the surface of the patient's teeth 5 by fitting the tray 3 to the patient's teeth 5.

However, the conventional transfer device (a) has the following problems. That is, as shown in FIG. 11, a flexible tray 3 having a substantially U-shaped cross section with the bottom surface 1a of the bracket 1 exposed on the inner surface is pressed against the patient's teeth 5 in the direction of the tooth axis to be fitted on the tooth surface. The bottom surface 1a of the bracket 1 when the tray 3 is fitted.
Will rub against the tooth surface. Therefore, the adhesive applied to the bottom surface 1a of the bracket 1 may be peeled off. As a result, there arises a problem that the bottom surface 1a of the bracket 1 is not sufficiently fixed to the tooth surface. Also, bracket 1
Is exposed on the inner surface of the tray 3 having a substantially U-shaped cross section. Therefore, when the tray 3 is fitted to the patient's teeth 5 as described above, the position of the bracket 1 with respect to the tooth surface is visually confirmed. It is extremely difficult. Therefore, it is not easy to accurately fix the bracket 1 to a predetermined position on the tooth surface. In particular, as shown in FIG.
When a large number of brackets 1 are attached to each other, it is extremely difficult to accurately fix each bracket 1 to a predetermined position on each tooth surface.

In order to solve such a problem, the present inventor disclosed in Japanese Patent Application Laid-Open No. Hei 10-258070 a bracket transfer device (hereinafter referred to as a "conventional transfer device (hereinafter referred to as" conventional transfer device ") for indirect bonding of orthodontics as described below. B) "). As shown in FIG. 12, this conventional transfer apparatus (b) forms a tray 11 having a shape corresponding to the patient's teeth 5 by using a working model in which the patient's teeth 5 are accurately duplicated. Is provided with a support tube 12, and a sliding arm 13 is slidably fitted on the support tube 12, and a bracket 16 provided with a holding means 15 for an arch wire 14 is fitted to the slide arm 13 via a support 17. Attachment, the tray 11 is fitted to the teeth 5 of the patient, and the sliding arm 13 is slid with respect to the support cylinder 12 so that the bracket 16 moves in the direction of coming and going to and away from the tooth surface 5a. When the arm 13 is slid in the tooth surface direction (the direction in which the bracket 16 moves toward the tooth surface 5a), the bracket 16 comes into contact with a predetermined position on the tooth surface 5a. Reference 19 in FIG.
Is an adhesive applied to the surface of the bracket 16 facing the tooth surface 5a.

In the conventional transfer device (b), when the sliding arm 13 is slid in the tooth surface direction with respect to the support cylinder 12, the bracket 16 is brought into contact with a predetermined position on the tooth surface 5a. Therefore, the bracket 16 does not rub against the tooth surface 5a of the patient. Accordingly, there is no possibility that the adhesive applied to the surface of the bracket 16 facing the tooth surface 5a may be peeled off, and the bracket 16 is securely fixed to the patient tooth surface 5a. Also, bracket 1
When attaching the bracket 16 to the tooth surface 5a of the patient, the work can be performed while visually observing the bracket 16 when the bracket 16 is fixed to the tooth surface 5a. Accuracy is improved.

[0006]

As described above, the conventional transfer device (b) alleviates the problems of the conventional transfer device (a). Still has the following problems.

Since the sliding arm 13 is always slidable with respect to the support cylinder 12, the tooth surface 5a of the bracket 16 is
When applying the adhesive 19 to the surface facing the
Position is not fixed. Therefore, when applying the adhesive 19 to the bracket 16, it is necessary to fix the bracket 16 or its support 17 with a finger or the like, which makes the operation troublesome.

When the support 17 is pushed in the tooth direction by a finger when the sliding arm 13 is slid in the direction of the tooth surface, the support 17
May be bent in the tooth surface direction as shown by a chain line in FIG. When the support 17 is bent in the tooth surface direction, the bracket 16 is not fixed to a predetermined position on the tooth surface 5a.

Since the sliding arm 13 is always slidable with respect to the support cylinder 12, when the bracket 16 is bonded to the tooth surface 5a, the bracket 16 must be continuously pressed against the tooth surface 5a by a finger or the like.

The present invention has been made to solve the above-mentioned problems in the conventional transfer apparatus (b).

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an apparatus for transferring brackets in indirect bonding of orthodontics as described below.

(1) A tray having a shape corresponding to the patient's teeth is formed from a working model that accurately duplicates the patient's teeth, and the tray is provided with a support cylinder, and the support cylinder is slid. The arm is slidably fitted, a bracket provided with an arch wire holding means is attached to the sliding arm, the tray is fitted to the patient's teeth, and the sliding arm is slid with respect to the support cylinder. Wherein the support arm moves in the direction of contacting and separating from the tooth surface, and the bracket comes into contact with a predetermined position on the tooth surface when the sliding arm is slid in the direction of the tooth surface. A stopper having a tendency to always protrude inward of the support cylinder is provided so as to be movable in and out of the support cylinder, and the sliding arm has a first cutout corresponding to the stopper and a second notch. Forming a notch, An adhesive is applied to a surface of the bracket facing the tooth surface when the topper is fitted in the first notch, and the bracket is pressed against the tooth surface when the stopper is fitted in the second notch. A bracket transfer device for indirect bonding of orthodontics, characterized in that the bracket is transferred (claim 1).

(2) A stopper hole is formed in the support cylinder so as to penetrate the support cylinder into and out of the support cylinder. The stopper fixes one end of an elastic body to the outer surface of the support cylinder and connects the other end of the elastic body to the stopper. It is arranged in the hole (claim 2).

(3) The sliding arm is bent upward substantially at a right angle at an intermediate portion to form a rising portion, and the rising portion is folded downward to form a vertical portion. The bracket is attached (claim 3).

[0015]

The transfer device according to claim 1 has a tendency that the stopper always protrudes inward of the support tube. Therefore, by sliding the sliding arm with respect to the support tube, the stopper is moved to the first cutout portion or the first cutout portion. Fits in the second cutout. When the stopper fitted to the first notch or the second notch is removed from the first notch or the second notch, the stopper is opposed to the tendency of the support cylinder to project inward. Move it out of the support tube with your fingers. When the stopper is fitted in the first notch or the second notch,
The stopper prevents the sliding arm from sliding and locks the sliding arm. The position of the bracket is fixed by locking the sliding arm with the stopper fitted in the first cutout. In this state, an adhesive is applied to the surface of the bracket facing the tooth surface. By locking the sliding arm with the stopper fitted in the second notch, the bracket is held in a state of being pressed against the tooth surface, and the bracket is securely bonded to the tooth surface with an adhesive. At this time, there is no need to press the bracket against the tooth surface with a finger or the like.

[Transfer device of claim 2] The stopper is made of an elastic body, and has a tendency to always project inward of the support cylinder due to the elasticity of the elastic body.

When the sliding arm is pushed into the support cylinder, the rising portion of the sliding arm is pushed by a finger or the like. Not only is the rising portion easy to push, but when the rising portion is pushed, there is no risk that the vertical portion of the sliding arm will bend in the tooth surface direction. That is, the bracket attached to the vertical portion is fixed at a predetermined position on the tooth surface.

[0018]

Next, embodiments of the present invention will be described with reference to the accompanying drawings. The reference numeral 21 indicates a tray. The tray 21 is provided with a shape corresponding to the patient's teeth 5 by using a working model that accurately duplicates the patient's teeth 5. The tray 21 is formed of a hard material such as a synthetic resin such as a photopolymerized resin.

The tray 21 is provided with a support cylinder 23.
The support cylinder 23 is preferably a square cylinder having a central hole 25 having a rectangular cross section. One end 27a of a sliding arm 27 preferably having a rectangular cross section is slidably fitted into the central hole 25 of the support cylinder 23. That is, the sliding arm 27 is slidable in the length direction with respect to the support cylinder 23 and cannot rotate.

The sliding arm 27 has a bracket 33 provided with a holding means 31 for the arch wire 24 (see FIGS. 4 to 9).
Attach. By sliding the sliding arm 27 with respect to the support cylinder 23, the bracket 33 is moved in the direction of coming into contact with and separating from the tooth surface 5a, and when the sliding arm 27 is slid in the direction of the tooth surface 5a, The bracket 33 is in contact with a predetermined position on the tooth surface 5a. The tray 21 is fitted to the patient's teeth 5.

FIGS. 8 and 9 show the relationship between the bracket 33 and the sliding arm 27. FIG. The arch wire 24 is provided on the surface 33b (the surface opposite to the tooth surface 5a) of the bracket 33.
The other end 27b of the sliding arm 27 is formed in a substantially cross shape corresponding to the groove 35. The other end 27b of the sliding arm 27 is locked in the groove 35 of the bracket 33 while the arch wire 24 is held in the groove 35 of the surface 33b of the bracket 33, and the other end 27b of the sliding arm 27 is connected to the bracket 33.
Is temporarily fixed with a synthetic resin 37 such as a thermoplastic resin. An adhesive 39 is applied to a surface 33a of the bracket 33 facing the tooth surface 5a, and the bracket 33 is bonded to the tooth surface 5a with the adhesive 39. After bonding the bracket 33 to the tooth surface 5a, the synthetic resin 37 and the sliding arm 27
Is removed from the bracket 33, and the surface 33 of the bracket 33 is removed.
The arch wire 24 is held in one straight portion of the substantially cross-shaped groove 35 of 3b. In the illustrated example, the surface 33a of the bracket 33 facing the tooth surface 5a forms an inclined surface corresponding to the tooth surface 5a, but the surface 33a of the bracket 33 facing the tooth surface 5a does not necessarily need to be inclined.

Next, an improvement according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. A stopper 41 having a tendency to always project inward from the support cylinder 23 is provided on the support cylinder 23.
Are movably arranged in the inside and outside directions of the support cylinder 23. A first notch 43 and a second notch 45 corresponding to the stopper 41 are formed at one end 27a of the sliding arm 27, and when the stopper 41 is fitted into the first notch 43 ( 1 and 4) when an adhesive 39 is applied to a surface 33a of the bracket 33 facing the tooth surface 5a, and when the stopper 41 is fitted in the second cutout portion 45 (FIG. 5).
The bracket 33 comes into pressure contact with the tooth surface 5a.

The support cylinder 23 is formed with a stopper hole 51 penetrating the support cylinder 23 in and out.
Preferably, one end 41a of the elastic body is fixed to the outer surface of the support cylinder 23 (see reference numeral 53 in FIG. 2), and the other end 41b of the elastic body is disposed in the stopper hole 51. is there.

Preferably, the sliding arm 27 is bent upward at a substantially right angle at an intermediate portion to form a rising portion 27c, and the rising portion 27c is folded downward to form a vertical portion 27d. The bracket 3 is attached to the vertical portion 27d.
3 is attached.

[0025]

When the stopper is fitted in the first notch, the sliding arm is locked and the position of the bracket is fixed. In this state, the adhesive is applied to the surface of the bracket facing the tooth surface, but since the position of the bracket is fixed in this way, the action of applying the adhesive to the surface of the bracket facing the tooth surface is not effective. It can be performed easily and reliably. When the stopper fits into the second notch,
The sliding arm is locked with the bracket pressed against the tooth surface. That is, the bracket is held in pressure contact with the tooth surface with a uniform force, and the bracket is securely bonded to the tooth surface with the adhesive. At this time, there is no need to press the bracket against the tooth surface with a finger or the like.

[Transfer device of claim 2] The invention of claim 2 exhibits the same effect as the invention of claim 1.

[Transfer device of claim 3] The sliding arm has a rising portion. Not only is the rising portion easy to push, but when the rising portion is pushed, there is no risk that the vertical portion of the sliding arm will bend in the tooth surface direction. That is,
The bracket attached to the vertical portion is accurately fixed at a predetermined position on the tooth surface.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a sliding arm is slidably fitted on a support cylinder.

FIG. 2 is a side view showing a support cylinder and one end of a sliding arm.

FIG. 3 is a side view showing a support cylinder and a sliding arm.

FIG. 4 is a side view showing a use state of a support cylinder and a sliding arm.

FIG. 5 is another diagram showing a use state of the support cylinder and the sliding arm.

FIG. 6 is a side view showing a state where the bracket is fixed to the tooth surface.

FIG. 7 is a front view showing a bracket fixed to a tooth surface and an arch wire supported by the bracket.

FIG. 8 is a perspective view showing a bracket and the other end of the sliding arm.

FIG. 9 is a side view showing the bracket and the other end of the sliding arm.

FIG. 10 is a perspective view showing a conventional transfer device (a).

FIG. 11 is a side view showing a use state of the device.

FIG. 12 is a side view showing a use state of a conventional transfer device (b).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 1a Bottom surface 3 Tray 5 Teeth 5a Teeth 11 Tray 12 Support tube 13 Sliding arm 14 Archwire 16 Bracket 17 Support 19 Adhesive 21 Tray 23 Support tube 24 Archwire 25 Center hole 27 Sliding arm 27a One end 27b Others End 27c Rising part 27d Vertical part 31 Holding means 33 Bracket 33a Surface facing the tooth surface 33b Surface 35 Groove 37 Synthetic resin 39 Adhesive 41 Stopper 41a One end 41b Other end 43 First cutout 45 Second cutout 51 Stopper Hole

Claims (3)

[Claims] 1. A tray having a shape corresponding to a patient's teeth is formed by a working model accurately replicating the patient's teeth,
The tray is provided with a support cylinder, a sliding arm is slidably fitted on the support cylinder, a bracket provided with an archwire holding means is attached to the slide arm, and the tray is fitted on the patient's teeth. By sliding the sliding arm with respect to the support cylinder, the bracket is moved in a direction of coming into contact with and separating from the tooth surface, and when the sliding arm is slid in the tooth surface direction, the bracket moves to the tooth surface. A transfer device that is in contact with a predetermined position on the surface, wherein a stopper having a tendency to always protrude inward from the support tube is provided on the support tube so as to be movable in and out of the support tube, A first notch portion and a second notch portion corresponding to the stopper are formed on the moving arm, and an adhesive is provided on a surface of the bracket facing the tooth surface when the stopper is fitted into the first notch portion. And apply the stopper A bracket transfer device for indirect bonding in orthodontics, wherein the bracket is pressed against a tooth surface when the bracket is fitted in the second cutout portion. 2. A stopper hole is formed in the support cylinder so as to penetrate the support cylinder in and out. The stopper fixes one end of an elastic body to an outer surface of the support cylinder and connects the other end of the elastic body to the stopper hole. 2. The device according to claim 1, wherein
Bracket transfer device for indirect bonding of orthodontics. 3. The sliding arm is bent upward at substantially a right angle at an intermediate portion to form a rising portion, and the rising portion is folded downward to form a vertical portion. 3. A bracket is attached.
Bracket transfer device for indirect bonding of orthodontics.