Distraction device for impacted teeth and method of preparation and operation

Abstract

The application provides a traction device for impacted teeth and a preparation and operation method, comprising a traction hook, a shaped traction auxiliary bow, a prop, a transpalatal bar (TPA), a buccal tube, an anterior incline bend and a loop bend. The device has flexible traction direction, can flexibly add the position of the traction hook according to the required traction direction, and solves the problem of strong foreign body sensation and discomfort when the patient wears the traditional traction device. The bilateral molars provide anchorage, reducing the influence on the single tooth around the impacted anterior tooth. The application solves the problems of insufficient anchorage and single traction direction in the prior art, improves the correction efficiency, and has the characteristics of simple preparation, comfortable wearing and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of orthodontics, and particularly relates to a traction device for impacted teeth. The device is suitable for the treatment of impacted teeth, especially for the treatment of impacted incisors, and has the characteristics of high efficiency, simplicity and lightness. BACKGROUND

[0002] Impacted teeth are teeth that cannot fully erupt or partially erupt due to adjacent teeth, bone or soft tissue. The teeth around the teeth cannot erupt to the normal position due to the blockage of bone, teeth or fibrous tissue, and if the blockage is slight, the teeth may be slow or misaligned. If the blockage is severe, the teeth may be buried in the mucosa or bone, which is called impacted teeth. Impacted teeth can occur in any tooth position of the dental arch, and the reasons for impacted teeth include early loss of deciduous teeth, retention of deciduous teeth, crowded dentition, supernumerary teeth in the upper jaw, etc.

[0003] Impacted teeth are a common clinical disease in orthodontics, and the reported incidence varies. In an earlier study, the incidence of maxillary incisor impaction was 0.92% to 2.2%, and the incidence of maxillary canine impaction was the highest, and the incidence of mandibular canine impaction was only 0.35%. The clinical manifestations are the absence of normal tooth position, which can be accompanied by retained deciduous teeth, supernumerary teeth, adjacent tooth inclination, insufficient space, etc. Cone beam CT can accurately diagnose and locate impacted teeth.

[0004] Orthodontic comprehensive treatment includes surgical exposure, removal of retained deciduous teeth or supernumerary teeth, removal of lesions such as odontoma or cyst, and orthodontic expansion of the space to provide conditions for self-eruption. When the surgical removal of local soft and hard tissue obstacles fails to allow the tooth to erupt smoothly, orthodontic traction or extraction and orthodontic treatment and autologous tooth transplantation are required. Among them, surgical exposure combined with orthodontic traction treatment is the most commonly used method in clinical practice. After surgical exposure of the impacted tooth, traction should be started as soon as possible within 2-3 weeks to avoid tooth fixation. A weak and persistent traction force should be used, and the traction speed should not be too fast to avoid periodontal problems such as gingival recession. The adjacent tooth roots should be avoided during traction to prevent adjacent tooth root resorption.

[0005] The commonly used orthodontic traction devices include mobile and fixed appliances. Regardless of the type of traction device, the most important factor to consider is the design of the anchorage and the direction of traction. The commonly used methods include modified Nance arch and fixed appliances.

[0006] For the clinical commonly used modified Nance arch, the design is to weld or cast a traction hook on the anterior segment of the Nance arch, so that it extends to the impacted tooth area for traction. The advantage of this traction device is that it utilizes the posterior tooth anchorage, but the device is relatively large in size, and the patient has a significant foreign body sensation when used. At the same time, the traction direction is affected by the position of the extended traction hook, and the traction direction is single, which is not conducive to changing the traction direction during treatment, and for some patients with deep overbite, the lower incisors are likely to resist the traction hook, so it is not suitable.

[0007] Secondly, when the fixed appliance is used to traction the impacted tooth, although its structure is simple and the foreign body sensation is small, it relies on the teeth around the impacted tooth area to provide anchorage. For patients with pre-eruptive anterior teeth, there is a situation that the deciduous teeth have not fallen out or the permanent teeth have not erupted for a short time. The anchorage provided by the deciduous teeth is small and there is a risk of loosening and falling out, and the anchorage provided by the newly erupted permanent teeth is not conducive to the development of the permanent tooth roots. SUMMARY

[0008] In order to solve the above problems of the prior art, the technical scheme of the present application is as follows:

[0009] A traction device for impacted teeth, comprising: a shaped traction auxiliary arch 2, a transpalatal bar TPA 4 fixedly connected between the buccal tubes 5; the two ends of the arch wire of the shaped traction auxiliary arch 2 are respectively inserted into the auxiliary arch tubes of the left and right buccal tubes 5;

[0010] The shaped traction auxiliary arch 2 is located in the The shaped traction auxiliary arch 2 is located in the The shaped traction auxiliary arch 2 is located in the The shaped traction auxiliary arch 2 is located in the

[0011] The transpalatal bar TPA 4 is provided in the molar area, and the buccal tubes 5 are provided on both sides of the transpalatal bar TPA 4; the transpalatal bar TPA 4 is fixedly connected with The clasp 3 is provided on the adjacent teeth of the transpalatal bar TPA 4; The clasp 3 is provided on the adjacent teeth of the transpalatal bar TPA 4;

[0012] The traction hook 1 is detachably connected to the shaped traction auxiliary arch 2, and the position of the traction hook 1 on the auxiliary arch corresponds to the position of the impacted tooth on the dental arch, that is, the traction hook is added to the impacted tooth segment of the traction auxiliary arch.

[0013] As a preferred mode, the inclined bend and the loop 7 are provided at the position of the arch wire close to the mesial opening of the buccal tube.​

[0014] As a preferred embodiment, the buccal tube 5 is a double-tube buccal tube.

[0015] As a preferred method, the transpalatal bar TPA4 is fixedly connected to the buccal tubes 5 by one of the following methods: welding, casting, or bonding.

[0016] As a preferred embodiment, the traction hook 1 is clamped onto the shaped traction auxiliary bow 2.

[0017] As a preferred method, the bowwire of the shaped traction auxiliary bow is made of β-titanium wire TMA material.

[0018] As a preferred method, the bowwire of the shaped traction bow has a square cross-section of 0.019 × 0.025 inches. This square TMA bowwire has a higher stiffness and a certain degree of elasticity compared to round Australian wire.

[0019] As a preferred embodiment, the traction hook 1 is connected to the traction auxiliary arch 2 and is used to traction the impacted tooth to the target position within the dental arch.

[0020] The shaped traction auxiliary bow 2 is used to connect with the posterior tooth area device and provide an attachment point for the traction hook;

[0021] Support 3 is used to distribute the force on the molars that are bonded to the transpalatal bar TPA to adjacent teeth;

[0022] The transpalatal bar TPA4 is used to provide anchorage for both molars and to provide traction force for impacted teeth.

[0023] The buccal tube 5 is used to provide attachment sites for the traction auxiliary bow;

[0024] The forward tilt 6 is used to move the archwire further away from the impacted tooth segment. The square provides traction.

[0025] The present invention also provides a method for preparing the aforementioned traction device for impacted teeth, which comprises:

[0026] Based on the maxillary tooth model of the patient being pulled, a transpalatal bar TPA4 was fabricated and fixedly connected to the buccal tube 5. The transpalatal bar TPA4 was then bonded to the patient's mouth. Simultaneously, the pre-formed traction archwire was bent into anterior tilt 6 and loop 7 near the midpoint of the buccal tube, and both ends of the archwire were inserted into the buccal tube of the transpalatal bar TPA. The degree of the anterior tilt was adjusted to allow the archwire in the anterior segment to reach a position away from impacted teeth. At the target position, add a traction hook 1 to the impacted tooth section of the traction auxiliary bow wire to connect the impacted tooth and the traction hook.

[0027] The present invention also provides a method for operating the aforementioned traction device for impacted teeth, which is as follows:

[0028] In the vertical direction perpendicular to the occlusal plane: when impacted anterior teeth are pulled, the anterior teeth receive elongation force, while the bilateral posterior teeth, acting as anchorage, are subjected to indentation force. Support 3 is used to distribute the compressive force on the molars;

[0029] In the horizontal direction perpendicular to the midsagittal plane, the buccal surface of the molars is subjected to force, causing the bilateral molars to tilt buccally; the transpalatal bar TPA4 is used to resist the buccal tilting force on the left and right molars.

[0030] In the sagittal direction, the force on the buccal crown of the molar causes the molar to tilt mesially. The transpalatal bar TPA4 is used to resist the mesial-distal tilting force on the molar. At the same time, the traction hook of the buccal tube and the ligation of the loop on the archwire are used to prevent the molar from moving anteriorly and posteriorly.

[0031] After the traction archwire interacts with the transpalatal bar (TPA), the tip of the archwire is positioned near the anterior teeth. On both sides of the buccal canal 5, a forward-tilting bend 6 is respectively set at the mesial archwire to keep the archwire of the shaping traction auxiliary arch 2 further away from the impacted tooth. Fang; Add a traction hook to the front section of the archwire according to the traction direction. The traction hook is added to the impacted tooth section of the traction auxiliary arch, and the impacted tooth and the traction hook are connected to perform traction on the impacted tooth.

[0032] This invention solves the problems of insufficient anchorage, single traction direction, and patient discomfort in the existing technology, overcomes the defects of the existing technology, improves the orthodontic efficacy, and has the characteristics of simple manufacturing and comfortable wearing.

[0033] Compared with existing technologies, this device has the following advantages and beneficial effects:

[0034] 1. Flexible traction direction; the position of the traction hook can be flexibly added according to the required traction direction.

[0035] 2. The device is simple to use, solving the problem of strong foreign body sensation and discomfort for patients wearing traditional traction devices. At the same time, it utilizes bilateral molars to provide anchorage, reducing the impact on single-rooted teeth around impacted anterior teeth. Attached Figure Description

[0036] Figure 1 This is the invention Schematic diagram of the front view;

[0037] Figure 2 This is a side view of the present invention;

[0038] 1 is the towing hook, 2 is the shaped towing auxiliary bow, and 3 is... Support, 4 is the transpalatal bar TPA, 5 is the buccal canal, 6 is the anterior tilt curve, and 7 is the loop. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] like Figure 1 As shown, this embodiment provides a traction device for impacted teeth, including: a shaped traction auxiliary arch 2 and a transpalatal bar TPA4 fixedly connected between buccal tubes 5; the archwires of the shaped traction auxiliary arch 2 are respectively inserted into the auxiliary arch tubes of the buccal tubes 5 on the left and right sides.

[0041] like Figure 2 As shown, the shaped traction auxiliary arch 2 is located at the impacted tooth. Square; On the left and right sides of the buccal tube 5 of the traction auxiliary bow, a forward tilting bend 6 is set near the middle. The forward tilting bend 6 is a section of... The curved segment allows the archwire to be positioned further away from the impacted tooth. The forward tilt bend 6 is positioned near the archwire at the mesial position of the buccal canal, and a loop 7 is also made at this point, also near the mesial position of the buccal canal. The forward tilt bend and loop 7 are positioned close to the mesial opening of the buccal canal. The loop is ligated to the traction hook of the buccal canal to restrict anteroposterior movement of the molar at this location.

[0042] The transpalatal bar TPA4 is located in the molar region, and buccal tubes 5 are provided on both sides of the transpalatal bar TPA4. The transpalatal bar TPA4 is fixedly connected to the buccal tubes 5 by welding, casting, or bonding. The buccal tubes 5 are double-tube buccal tubes. The transpalatal bar TPA4 is fixedly connected to... Support 3, Rest 3 is placed on the adjacent tooth of transpalatal bar TPA4;

[0043] The traction hook 1 is detachably connected to the shaped traction auxiliary arch 2. The position of the traction hook 1 in the auxiliary arch corresponds to the position of the impacted tooth in the dental arch, that is, the traction hook is added to the impacted tooth segment of the traction auxiliary arch.

[0044] In this embodiment, the traction hook 1 is clamped on the shaped traction auxiliary bow 2.

[0045] In this embodiment, the bowwire of the shaped traction auxiliary bow is made of β-titanium wire TMA material.

[0046] In this embodiment, the archwire of the traction auxiliary arch is square with a cross-section of 0.019 × 0.025 inches. This square archwire of TMA material has a greater stiffness than the round archwire and has a certain elasticity. The traction hook 1 is connected to the traction auxiliary arch 2 and is used to pull the impacted tooth to the target position inside the dental arch.

[0047] The shaped traction auxiliary bow 2 is used to connect with the posterior tooth area device and provide an attachment point for the traction hook;

[0048] Support 3 is used to distribute the force on the molars that are bonded to the transpalatal bar TPA to adjacent teeth;

[0049] The transpalatal bar TPA4 is used to provide anchorage for both molars and to provide traction force for impacted teeth.

[0050] The buccal tube 5 is used to provide attachment sites for the traction auxiliary bow;

[0051] The forward tilt 6 is used to move the archwire further away from the impacted tooth segment. The square provides traction.

[0052] This embodiment also provides a method for preparing the aforementioned traction device for impacted teeth, which is as follows:

[0053] Based on the maxillary tooth model of the patient being pulled, a transpalatal bar TPA4 was fabricated and fixedly connected to the buccal tube 5. The transpalatal bar TPA4 was then bonded to the patient's mouth. Simultaneously, the pre-formed traction archwire was bent into anterior tilt 6 and loop 7 near the midpoint of the buccal tube, and both ends of the archwire were inserted into the buccal tube of the transpalatal bar TPA. The degree of the anterior tilt was adjusted to allow the archwire in the anterior segment to reach a position away from impacted teeth. At the target position, add a traction hook 1 to the impacted tooth section of the traction auxiliary bow wire to connect the impacted tooth and the traction hook.

[0054] This embodiment also provides a method for operating the aforementioned traction device for impacted teeth, which is as follows:

[0055] In the vertical direction perpendicular to the occlusal plane: when impacted anterior teeth are pulled, the anterior teeth receive elongation force, while the bilateral posterior teeth, acting as anchorage, are subjected to indentation force. Support 3 is used to distribute the compressive force on the molars;

[0056] In the horizontal direction perpendicular to the midsagittal plane, the buccal surface of the molars is subjected to force, causing the bilateral molars to tilt buccally; the transpalatal bar TPA4 is used to resist the buccal tilting force on the left and right molars.

[0057] In the sagittal direction, the force on the buccal crown of the molar causes the molar to tilt mesially. The transpalatal bar TPA4 is used to resist the mesial-distal tilting force on the molar. At the same time, the traction hook of the buccal tube and the ligation of the loop on the archwire are used to prevent the molar from moving anteriorly and posteriorly.

[0058] After the traction archwire interacts with the transpalatal bar (TPA), the tip of the archwire is positioned near the anterior teeth. On both sides of the buccal canal 5, a forward-tilting bend 6 is respectively set at the mesial archwire to keep the archwire of the shaping traction auxiliary arch 2 further away from the impacted tooth. Fang; Add a traction hook to the front section of the archwire according to the traction direction. The traction hook is added to the impacted tooth section of the traction auxiliary arch, and the impacted tooth and the traction hook are connected to perform traction on the impacted tooth.

[0059] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An appliance for the retraction of a supernumerary tooth, characterised in that, The utility model relates to a kind of traction device for impacted tooth, including: Molding traction auxiliary bow (2), fixedly connected between cross-palatal bar TPA (4) of buccal tube (5);The archwire of molding traction auxiliary bow (2) is inserted into the auxiliary bow tube of left and right two sides buccal tube (5) respectively at both ends; Molding traction auxiliary bow (2) is located in the mesial of impacted tooth;Molding traction auxiliary bow archwire is provided with one proclination bend (6) in mesial of left and right two sides buccal tube (5) respectively, and proclination bend (6) is a section of bending section bending towards mesial, so that the archwire of impacted tooth segment is more far away from the mesial of impacted tooth;Proclination bend (6) is close to the mesial of archwire in buccal tube, and loop curve (7) is bent at this position simultaneously, and loop curve (7) is close to the mesial of buccal tube, loop curve is ligatured with traction hook of buccal tube, to limit the forward and backward movement of molar at this position; Cross-palatal bar TPA (4) is arranged in molar area, and left and right buccal tube (5) is arranged on the both sides of cross-palatal bar TPA (4);Cross-palatal bar TPA (4) is fixedly connected with torus (3) on it, and torus (3) is arranged on adjacent tooth of cross-palatal bar TPA (4); Traction hook (1) is detachably connected on molding traction auxiliary bow (2), and the position of traction hook (1) on molding traction auxiliary bow corresponds with the position of impacted tooth on dental arch, that is, traction hook is added on the impacted tooth segment of molding traction auxiliary bow.

2. A device for the repositioning of a tooth according to claim 1, wherein: Proclination bend and loop curve (7) are arranged at the position of archwire close to the mesial opening of buccal tube.

3. A device for the repositioning of a tooth according to claim 1, wherein: Buccal tube (5) is double-tube buccal tube.

4. A device for the repositioning of a tooth according to claim 1, wherein: Cross-palatal bar TPA (4) is fixedly connected between buccal tube (5) by one of welding, casting, bonding molding.

5. A device for the repositioning of a tooth according to claim 1, wherein: Traction hook (1) is clamped on molding traction auxiliary bow (2).

6. A device for the repositioning of a tooth according to claim 1, wherein: The archwire of molding traction auxiliary bow is made of beta titanium wire TMA material.

7. A device for the repositioning of a tooth according to claim 1, wherein: The section of archwire of molding traction auxiliary bow is square with 0.019*0.025 inch. 8.The traction device for impacted tooth according to any one of claims 1 to 7, characterized in that: Traction hook (1) is connected on molding traction auxiliary bow (2), for traction of impacted tooth to target position in dental arch; Molding traction auxiliary bow (2) is used to be connected with posterior tooth area device, to provide attachment site for traction hook; Torus (3) is used to disperse force received by molar of cross-palatal bar TPA to adjacent tooth; Cross-palatal bar TPA (4) is used to provide anchorage with bilateral molar, to provide force for traction of impacted tooth; Buccal tube (5) is used to provide attachment site for molding traction auxiliary bow; Proclination bend (6) is used to make archwire of impacted tooth segment more far away from mesial of impacted tooth, to provide traction force. 9.The preparation method of the traction device for impacted tooth according to any one of claims 1 to 7, characterized in that: According to the model of maxillary tooth in mouth of the person to be tractioned, cross-palatal bar TPA (4) fixedly connected on buccal tube (5) is made, and then cross-palatal bar TPA (4) is bonded in mouth of the person to be tractioned, and proclination bend (6) and loop curve (7) are bent on archwire at the mesial of buccal tube, and both ends of archwire are inserted into the buccal tube of cross-palatal bar TPA;The bending size of proclination bend is set so that the archwire of anterior tooth segment reaches target position far away from the mesial of impacted tooth, and traction hook (1) is added on the impacted tooth segment of molding traction auxiliary bow archwire, to connect impacted tooth and traction hook.

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