CN211484995U - Long arm root control bracket - Google Patents
Long arm root control bracket Download PDFInfo
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- CN211484995U CN211484995U CN201922318989.1U CN201922318989U CN211484995U CN 211484995 U CN211484995 U CN 211484995U CN 201922318989 U CN201922318989 U CN 201922318989U CN 211484995 U CN211484995 U CN 211484995U
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Abstract
The utility model provides a long-arm root-control bracket, which comprises a bracket body with a middle part provided with an arch wire groove, wherein two pairs of ligation wings are respectively arranged at the upper side and the lower side of the arch wire groove; the bottom end and the middle part of the traction arm are provided with a far-end traction hook and a middle-end traction hook which can be matched with the rubber chain. The utility model provides a long arm accuse root support groove can select crown root moving as a whole or accuse root moving pattern according to the tooth condition, can effectively improve the efficiency of the just abnormal treatment of tooth.
Description
Technical Field
The utility model relates to an orthodontic appliance technical field, concretely relates to long arm accuse root support groove.
Background
With the gradual improvement of the quality of life, more and more people select orthodontic treatment to improve the oral condition, and the orthodontic treatment is popularized and popularized. The existing conventional orthodontic treatment method is to adhere a tooth correction bracket to the surface of a tooth, connect the bracket with an archwire, deflect and align the tooth by guiding the archwire, and correct the tooth in a predetermined direction.
When the tooth is required to move to the far middle, the common method is to tie the two ends of the rubber chain on the buccal tube and the wings of the bracket, and apply a traction force F to the anterior crown by the retraction elasticity of the rubber chain. Since the impedance center P of a single tooth is not in the crown but in the root, the crown is easily rotated in the direction of the applied force, that is, the tooth is inclined, and the tooth cannot be corrected in a predetermined direction. As shown in figure 2, the direction of the force line of the traction force F is in the coronal direction of the resistance center, so that the tooth is not translated as a whole but rotated around the point P of the resistance center (a counterclockwise moment M is generated around the point P), namely, the crown moves to the far middle and the root moves to the near middle. The problem of tilting movement is exacerbated when the bracket slot clearance angle is too large, the archwire is not sufficiently rigid, or there is no archwire guide, an undesirable but unavoidable condition during the correction process.
The center of resistance (center of resistance) is the simplified center of resistance around the object that constrains its motion, and is inherent to the object and its surrounding constraints, and does not change with changes in external forces. When the force passes through the neutral impedance, the object moves integrally, and when the force does not pass through the center of the impedance, the object rotates. The center of impedance of an object in free space is its center of mass and the center of impedance of an object in the gravitational field is its center of gravity. For teeth, impedance neutrality is typically located between 23% and 38% of the crest to the apex of the alveolar ridge, i.e., the impedance center of a single tooth is located at the junction of the root neck 1/3 and the mesial 1/3).
In conventional orthodontic systems, a clockwise moment M "is created between the bracket slot and the archwire to control root movement in order to counter the adverse effects of tilting movement, but the actual results are not ideal. According to the following steps: the moment (M ═ F "×) F", which is provided by the elasticity of the archwire, is limited in length by the width of the bracket, so the couple M "is inefficient and insufficient to oppose M created by the pulling force F. I.e. M is in the opposite direction to M' and M is>M ", eventually tilt movement still occurs. As shown in figure 2 (P represents neutral impedance, F represents rubber chain force application direction, D1Indicating the moving direction of the dental crown, D2Representing the direction of root movement, M representing the moment of traction to rotate the tooth, M "representing the moment of counter-rotation generated by a conventional bracket).
SUMMERY OF THE UTILITY MODEL
The utility model provides a long arm accuse root support groove can select crown root moving as a whole or accuse root moving pattern according to the tooth condition, can effectively improve the efficiency of the just abnormal treatment of tooth.
In order to realize the technical purpose, the technical effect is achieved, and the utility model discloses a following technical scheme solves above-mentioned problem:
the long arm root control bracket comprises a bracket body, the middle part of which is provided with an arch wire groove, two pairs of ligation wings are respectively arranged at the upper side and the lower side of the arch wire groove, the middle parts of the two ligation wings at the lower side of the bracket body are fixedly connected with a traction arm, and the traction arm extends downwards to the depth of the bottom end to be close to the root pressing tip; the bottom end and the middle part of the traction arm are provided with a far-end traction hook and a middle-end traction hook which can be matched with the rubber chain.
In the scheme, different traction modes, namely an integral moving mode and a root control moving mode, can be selected according to the to-be-corrected condition of the teeth.
Integral moving mode: for the teeth which are upright per se, the crown and the root only need to move in parallel at the same time, and when the inclined movement of the teeth is not desired, the integral movement mode of the crown and the root can be selected. The implantation nail and the middle end traction hook (high position) are pulled by the rubber chain, the direction of the force line of the rubber chain for applying the traction force passes through the impedance neutrality of the tooth, namely d is 0 and M is F d when F passes through the point P, therefore, the traction force F generates the rotation moment M is 0, and the tooth generates the integral movement of the crown root.
Root control movement mode: for teeth with serious inclination, the root control moving mode can be selected when the tooth root needs to be moved and the tooth crown needs to be maintained basically. The implantation nail is implanted and the far-end traction hook (low position) is pulled through the rubber chain. At the moment, the direction of the force line of the rubber chain for applying traction force passes through the apex area, F is below the point P, the rotating moment M generated by F is clockwise, and the moment M' generated by the bracket is also clockwise. Therefore, the rotation directions of M and M' are the same, the tooth root moving efficiency is high, and the tooth root moving occurs while the tooth crown is basically not moved, namely, the tooth root controlling moving.
In order to facilitate traction to two sides, the far-end traction hook and the middle-end traction hook are left and right bidirectional traction hooks, the hook body is composed of a left circular arc hook and a right circular arc hook with the diameter of 0.8-1.0 mm, and the circular arc hooks on the two sides are symmetrically arranged on two sides of the traction arm.
Furthermore, the draft arm welds in bracket body upper portion, and the draft arm adopts the circular steel wire preparation of nichrome stainless steel that the diameter is 0.5 ~ 0.7mm, and total length is 12 ~ 14 mm.
Further, the distance between the far-end traction hook and the welding point is 12-14 mm, and the distance between the middle-end traction hook and the welding point is 7-9 mm.
The utility model has the advantages and effects that:
1. long arm accuse root holds in palm groove, the current problem of holding in the palm the groove and easily appearing the slope removal in using of analysis has add the draft arm and has pulled the hook structure, make hold in the palm the groove and have the crown root moving as a whole, accuse root removal multiple mode, the doctor can be according to treating of tooth and correcting the condition and select different traction mode, reach required traction effect.
2. The traditional dental crown traction mode is easy to enable the dental crown to rotate and tilt towards the stress application direction, so that the tooth cannot be corrected according to the preset direction, and the integral crown and root movement mode can be better suitable for the tooth which is upright and only needs the dental crown and the dental root to move in parallel at the same time; the root control moving mode can be better suitable for the teeth with serious self inclination and the teeth which need to move the tooth roots and keep the dental crowns basically still.
3. Draw arm and draw the hook structure succinctly, distal end draw hook, middle-end draw hook set up to control two-way draw hook, not only can be used to the drawing to the left and right sides, can not increase draw arm thickness moreover, avoid arousing the discomfort in oral cavity.
Drawings
FIG. 1 is a schematic view of a long-armed root-controlling bracket;
FIG. 2 is a schematic view of the operation of a rubber chain attached to a bracket tie wing;
FIG. 3 is a schematic diagram of the crown and root movement pattern;
FIG. 4 is a schematic diagram of a movement mode of the root control;
FIG. 5(a) is a front view of a long-arm root-controlling bracket being mounted to a dental crown;
FIG. 5(b) is a left side view of the long-arm root-controlling bracket being mounted to the dental crown.
And (3) identifying the figure number: 1. the bracket comprises a bracket body, 11, an arch wire groove, 12, a ligating wing, 2, a traction arm, 3, a far-end traction hook, 4, a middle-end traction hook, 5, a rubber chain, 6, a planting nail, 7, a buccal tube, 8 and an arch wire.
Detailed Description
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention.
As shown in fig. 1, the main body of the long-arm root-controlling bracket of this embodiment includes a bracket body 1, a towing arm 2, a far-end towing hook 3, and a middle-end towing hook 4. The inner side surface of the bracket body 1 is fixed on the dental crown through a bonding agent, the middle part of the outer side surface of the bracket body 1 is provided with a transverse arch wire groove 11, a pair of ligation wings 12 is respectively arranged at the upper side and the lower side of the arch wire groove 11, and the two ligation wings 12 which are in the same pair are arranged at the left and right gaps.
The upper end of the traction arm 2 is longitudinally welded on the outer side surface of the bracket body 1, and the welding spot is positioned between the two ligation wings 12 at the lower side. The traction arm 2 is made of a nickel-chromium alloy stainless steel round steel wire with the diameter of 0.6mm, and the total length is 13 mm. The far-end traction hook 3 and the middle-end traction hook 4 are respectively arranged at the positions 13mm and 8mm below the welding spot, the far-end traction hook 3 and the middle-end traction hook 4 are left and right bidirectional traction hooks, a hook body is composed of left and right arc hooks with outward openings, the diameter of the hook body is 1mm, and the arc hooks at two sides are symmetrically welded at two sides of the traction arm 2.
When it is desired to straighten a tooth which is itself relatively upright, as shown in figure 3, it is desirable to achieve simultaneous parallel movement of the crown and root and it is undesirable to have a tooth with a skewed movement. The long-arm root-control bracket is arranged on a tooth to be corrected, the inner side of the bracket body 1 is bonded to a dental crown, the traction arm 2 points downwards, as shown in figures 5(a) and 5(b), as the bracket body 1 has a certain thickness, the traction arm 2 is away from the gum by a certain distance, the traction operation cannot be influenced by pressing the gum, and the rest brackets, the arch wire 8 and the buccal tube 7 are arranged conventionally.
The planting nail 6 is planted in the left side of the middle end traction hook 4 and the horizontal position of the middle end traction hook, the right side circular arc hook of the planting nail 6 and the middle end traction hook 4 is connected through the rubber chain 5 (if the planting nail 6 is arranged on the right side, the rubber chain 5 is hooked on the left side circular arc hook), and the rubber chain 5 applies traction force F to the long arm root control bracket. Because the middle end traction hook 4 is positioned near the impedance center P of the tooth, the action line of the traction force F is leftward and passes through the impedance neutral P, i.e. D is 0 and M is F D when F passes through the point P, the rotation moment M generated by the traction force F is 0, and the tooth crown and the tooth root are both far away (D)1、D2) Moving, the tooth will not rotate any more but the crown and the root move together in parallel, i.e. the crown moves as a whole.
When it is desired to correct a tooth that is itself severely tilted, it is desirable to move the root while maintaining the crown position substantially stationary, as shown in figure 4. The long-arm root-control bracket described in this embodiment is mounted on a tooth to be corrected, the inner side of the bracket body 1 is bonded to a crown, the traction arm 2 is directed downward, as shown in fig. 5(a) and 5(b), and the rest of the bracket, the arch wire 8 and the buccal tube 7 are conventionally mounted.
The planting nail 6 is planted in the left side of the far-end traction hook 3 and the horizontal position of the far-end traction hook, the planting nail 6 is connected with the right circular arc hook of the far-end traction hook 3 through the rubber chain 5 (if the planting nail 6 is arranged on the right side, the rubber chain 5 is hooked on the left circular arc hook), and the rubber chain 5 applies traction force F to the long-arm root control bracket. The line of action of the traction force F now passes through the apex region, F being below point P, F producing a rotational moment M that is clockwise, and the bracket producing a moment M "that is also clockwise. Therefore, the rotation directions of M and M' are the same, the tooth root moving efficiency is high, and the tooth crown is slightly moved to the mesiodistal D1Moving, the root of the tooth far and medial D2When the tooth moves, the tooth rotates clockwise with the impedance neutral P, and the effective correction of the tooth can be realized, namely the root control movement.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments may be made without departing from the principles and spirit of the invention, which is within the scope of the invention.
Claims (4)
1. Long arm accuse root support groove, including the support groove body (1) that the archwire groove (11) was seted up at the middle part, the upper and lower both sides in archwire groove (11), its characterized in that are located to two pairs of tie wings (12) branch: a traction arm (2) is fixedly connected to the middle parts of the two ligation wings (12) on the lower side of the bracket body (1), and the traction arm (2) extends downwards to the bottom end with a depth close to the root pressing tip; the bottom end and the middle part of the traction arm (2) are provided with a far-end traction hook (3) and a middle-end traction hook (4) which can be matched with a rubber chain (5).
2. The long-arm root-control bracket of claim 1, wherein: the far-end traction hook (3) and the middle-end traction hook (4) are left and right bidirectional traction hooks, the hook body is composed of left and right arc hooks with the diameter of 0.8-1.0 mm, and the arc hooks on the two sides are symmetrically arranged on the two sides of the traction arm (2).
3. The long-arm root-control bracket of claim 1, wherein: the traction arm (2) is welded on the upper part of the bracket body (1), the traction arm (2) is made of a nickel-chromium alloy stainless steel round steel wire with the diameter of 0.5-0.7 mm, and the total length is 12-14 mm.
4. The long-arm root-controlling bracket of claim 3, wherein: the far-end traction hook (3) is 12-14 mm away from the welding point, and the middle-end traction hook (4) is 7-9 mm away from the welding point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922318989.1U CN211484995U (en) | 2019-12-20 | 2019-12-20 | Long arm root control bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922318989.1U CN211484995U (en) | 2019-12-20 | 2019-12-20 | Long arm root control bracket |
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| CN211484995U true CN211484995U (en) | 2020-09-15 |
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| CN201922318989.1U Active CN211484995U (en) | 2019-12-20 | 2019-12-20 | Long arm root control bracket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111166514A (en) * | 2019-12-20 | 2020-05-19 | 桂林医学院 | Long arm root control bracket |
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2019
- 2019-12-20 CN CN201922318989.1U patent/CN211484995U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111166514A (en) * | 2019-12-20 | 2020-05-19 | 桂林医学院 | Long arm root control bracket |
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