CN108703812B - Mandibular molar advancing device - Google Patents
Mandibular molar advancing device Download PDFInfo
- Publication number
- CN108703812B CN108703812B CN201810648926.XA CN201810648926A CN108703812B CN 108703812 B CN108703812 B CN 108703812B CN 201810648926 A CN201810648926 A CN 201810648926A CN 108703812 B CN108703812 B CN 108703812B
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- molar
- cavity
- retention
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- mandibular
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- 230000014759 maintenance of location Effects 0.000 claims abstract description 63
- 239000007943 implant Substances 0.000 claims abstract description 40
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 33
- 239000010935 stainless steel Substances 0.000 claims abstract description 31
- 210000004357 third molar Anatomy 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000003796 beauty Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 210000004373 mandible Anatomy 0.000 description 5
- 238000002513 implantation Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- ZIBSSYPUGNXJFJ-UHFFFAOYSA-N coronene-1-carbaldehyde Chemical compound C1=C2C(C=O)=CC3=CC=C(C=C4)C5=C3C2=C2C3=C5C4=CC=C3C=CC2=C1 ZIBSSYPUGNXJFJ-UHFFFAOYSA-N 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000004513 dentition Anatomy 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003447 ipsilateral effect Effects 0.000 description 1
- 230000003239 periodontal effect Effects 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
- 230000001720 vestibular Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
- A61C7/20—Arch wires
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention provides a mandibular molar advancing device, and relates to the field of orthodontic clinical appliances. The device comprises a first retention plate attached to the buccal side surface of a second molar of the lower jaw, a second retention plate attached to the buccal side surface of a third molar of the lower jaw, an L-shaped rod, a retention tube arranged at the root side of the second molar, a stainless steel square wire, a push spring in a compressed state and a micro-implant nail, wherein the micro-implant nail is arranged at the buccal side of the second molar; one end of the L-shaped rod is welded on the first and second retention plates, the other end of the L-shaped rod extends towards the direction of the tooth root and penetrates through the retention tube, the stainless steel square wire penetrates through the push spring, one end of the stainless steel square wire is fixed on the retention tube, and the other end of the stainless steel square wire is in sliding connection with the micro-implant nail. The invention not only can effectively move the second molar and the third molar of the lower jaw forwards, but also only relates to the posterior dental area, avoids the anterior dental area which is increasingly concerned by the patient, and greatly improves the beauty and comfort of the patient.
Description
Technical Field
The invention relates to the field of orthodontic clinical appliances, in particular to a mandibular molar advancing device.
Background
The mandibular first molar loss is common in clinic, and traditional restorative treatment can address the needs of patients, but can also damage the patients' natural teeth and is costly. With the development of orthodontic treatment techniques, the patient may choose to replace the missing first molar and the advancing second molar by retracting the ipsilateral mandibular second molar, advancing the third molar. However, the traditional orthodontic treatment often needs to correct the whole dentition bonding bracket, which greatly affects the beauty and comfort of the patient.
Disclosure of Invention
The invention aims to provide a mandibular molar advancement device which is suitable for drawing a second molar advancement to replace a missing first molar and a third molar to replace an advancing second molar in the presence of a second molar and a third molar on the same side of the mandible as the first molar. The invention not only can effectively move the second molar and the third molar of the lower jaw forwards, but also only relates to the posterior dental area, avoids the anterior dental area which is increasingly concerned by the patient, and greatly improves the beauty and comfort of the patient.
The purpose of the invention is realized by adopting the following technical scheme.
A mandibular molar advancement device adapted for use in the absence of a first molar on the lower jaw and in the presence of second and third molars on the same side of the lower jaw as the first molar, the device comprising a first retention plate attached to the buccal surface of the second molar, a second retention plate attached to the buccal surface of the third molar, an L-shaped rod, a retention tube positioned over the second molar, a stainless steel square wire, a compression spring and a micro-implant screw positioned on the buccal side of the second molar; one end of the L-shaped rod is welded on the first and second retention plates, the other end of the L-shaped rod extends towards the direction of the tooth root and penetrates through the retention tube, the stainless steel square wire penetrates through the push spring, one end of the stainless steel square wire is fixed on the retention tube, and the other end of the stainless steel square wire is in sliding connection with the micro-implant nail.
In the invention, the micro-implant nail comprises a screw rod, a main body and an implant part, wherein the main body is provided with a proximal-distal middle cavity and a crown-root cavity, and one end of the screw rod penetrates through the crown-root cavity of the main body and then is connected with the implant part through threads.
In a preferred technical scheme, the mandibular molar advancement device further comprises a hollow knob that is sleeved outside the L-shaped rod and is in threaded connection with the L-shaped rod.
In the present invention, the retention tube is provided with a mesial-distal cavity and a coronal-coronal cavity.
In the invention, one end of the stainless steel square wire passes through the mesial cavity of the retention tube and then is bent towards the root, and the other end of the stainless steel square wire passes through the mesial cavity of the micro-implant nail main body.
In the present invention, one end of the L-shaped rod passes through the coronal-coronal cavity of the retention tube.
In the invention, two ends of the push spring are respectively abutted against the retention tube and the micro-implant nail.
In the preferred technical scheme, the L-shaped rod is matched with the crown and root of the retention tube towards the cavity, and the stainless steel square wire is matched with the near-far hollow cavity of the retention tube and the near-far middle-towards cavity of the micro-implant nail.
In a preferred technical scheme, the retention plate comprises a bottom plate and an arch-shaped rod, two ends of the arch-shaped rod are connected with the bottom plate, the bottom plate is attached to the buccal side of the teeth, and the arch-shaped rod is connected with the L-shaped rod.
The invention has the beneficial effects that:
(1) the invention has small structure, not only can effectively move the second and third molars of the lower jaw forwards, but also only relates to the posterior dental area, avoids the anterior dental area which is increasingly concerned by the patient, and greatly improves the beauty and comfort of the patient.
(2) The invention fully considers the three-dimensional space stress condition of the tooth to be pulled, smoothly realizes the integral movement of the tooth, and avoids the adverse effect on the periodontal caused by the tooth inclination and the occlusion interference caused by the inclination in the correction.
(3) The force application device adopts the niti push spring to apply force, the force attenuation is slow, the time interval of the patient's return visit is longer, the convenience is brought to the patient, and the working efficiency of a doctor is improved.
(4) The micro-implant anchorage nail greatly avoids the influence on the positions of other teeth.
Drawings
FIG. 1 is a view showing the state of use of the present invention, wherein 1-the retention tube, 2-the first retention plate, 3-the stainless steel square wire, 4-the micro-implant nail, 5-the L-shaped rod, 6-the second retention plate, 7-the second molar, 8-the second premolar, 9-the third molar, and 10-the push spring.
Fig. 2 is a schematic view of the retention tube, wherein 11-coronal cavity and 12-mesial-distal cavity.
Fig. 3 is a cross-sectional view of the knob, 13-knob.
Fig. 4 is a schematic view of the retention plate configuration, 16-arch bar, 17-base plate.
Figure 5 shows a schematic view of the micro-implant nail structure, in which 18-screw, 19-main body, 20-mesiodial cavity, 21-coronal cavity, 22-implant.
Detailed Description
Example 1
The structure and the using method of the invention are described in conjunction with the attached drawings.
Referring to fig. 1, the first molar on the left side of the lower jaw of the patient is absent, and the second and third molars 7 and 9 on the left side of the lower jaw exist, and the first missing molar and the second mesial moving molar are replaced by the mandibular molar advancing device for pulling the second and third molar advances on the left side of the lower jaw respectively.
The mandibular molar advancing device comprises a first retention plate 2 attached to the buccal surface of a second molar on the left side of a mandible, a second retention plate 6 attached to the buccal surface of a third molar on the left side of the mandible, an L-shaped rod 5, a retention tube 1 arranged in the root space of the second molar on the left side of the mandible, a stainless steel square wire 3, a push spring 10 in a compressed state and a micro-implant nail 4, wherein the micro-implant nail is arranged in a cortical bone on the buccal side of the second molar on the left side of the mandible; one end of the L-shaped rod is welded on the first and second retention plates, the other end extends towards the direction of the tooth root and passes through the retention tube, the stainless steel square wire passes through the push spring, one end of the stainless steel square wire is fixed on the retention tube, and the other end is connected with the micro-implant nail in a sliding way. The invention provides the force for moving the second molar and the third molar of the lower jaw in the mesial direction by using the micro-implant nail as anchorage and the stainless steel square wire as a sliding track and using the niti push spring.
The micro-implant nail comprises a screw rod 18, a main body 19 and an implant part 22, wherein the main body is provided with a proximal-distal middle cavity 20 and a coronal-coronal cavity 21, and one end of the screw rod penetrates through the coronal-coronal cavity of the main body and then is connected with the implant part through threads. The implantation part is provided with a cavity, and the inner wall of the cavity is provided with internal threads. The external thread of the screw rod is matched with the internal thread of the implantation part. The main body is cuboid, and the cross section of the proximal-distal middle cavity of the main body is a rectangle of 0.022 × 0.028 inch. One end of the stainless steel square wire penetrates through the mesial cavity of the main body of the micro-implant nail, so that the stainless steel square wire can slide in the mesial cavity of the main body during the second molar advancement process on the left side of the lower jaw. In addition, because the force of mesial movement provided by the mandibular molar advancing device of the present invention is located on the buccal side of the center of the impedance of the moved molar, i.e., there is a tendency for mesial lingual rotation while the molar is moving mesially, by adjusting the mesial deviation of the body of the micro implant of the present invention to the buccal side by 10-15 degrees, buccal force is generated on the mesial end of the moved molar, thereby preventing the lingual rotation of the moved molar.
The mandibular molar advancement device further comprises a hollow knob 13 that is received over the outside of the portion of the L-shaped rod extending in the root direction and is threadedly connected to the L-shaped rod. The knob is provided with an internal thread, the L-shaped rod is provided with an external thread, and the internal thread is matched with the external thread. The vertical position of the retention tube is adjusted by adjusting the vertical position of the knob. When the pushing spring applies force, the second molar and the third molar on the left side of the lower jaw are forced forwards, and the vestibular sulcus of the back tooth area is shallow, so that the applied force line is positioned in the occlusal direction of the resistance center, and the result is that the second molar and the third molar on the left side of the lower jaw incline towards the middle. If the mesial inclination of the moved molars is found in clinical treatment, the knob can be screwed down, the retention tube is pressed downwards through the knob, the retention tube is vertically downwards moved, and thus the mesial force of the second molars and the third molars can be applied, and the mesial inclination of the second molars and the third molars in the advancing process can be avoided. For the molars with the initial mesial inclination, another 0.018 x 0.025NITI square wire is taken, one end of the wire is fixed in the mesial-distal cavity of the retention tube, and the other end of the wire is fixed at the head of the screw rod of the micro-implant nail, so that the rotating moment coupling can be generated for the inclined molars to promote the erection of the inclined molars.
The retention tube is provided with a mesial-distal cavity 12 and a coronal-coronal cavity 11, and one end of the L-shaped rod extends in the direction of the root and passes through the coronal-coronal cavity of the retention tube.
One end of the stainless steel square wire penetrates through the middle-to-near cavity of the retention tube and then is bent towards the root, so that the stainless steel square wire can be conveniently fixed with the retention tube. The cross section of the stainless steel square wire is a rectangle of 0.019inch 0.025 inch. The L-shaped rod is a 0.045inch stainless steel round wire. The L-shaped rod is matched with the crown and root of the retention tube to the cavity, and the stainless steel square wire is matched with the mesial cavity of the retention tube and the mesial cavity of the micro-implant nail.
The two ends of the push spring are respectively abutted against the retention pipe and the micro-implant nail, so that the push spring can be ensured to be in a compressed state.
The retention plate comprises a base plate 17 attached to the buccal side of the teeth and an arch bar 16 connected to the L-shaped bar at both ends. The arch-shaped rod of the position-fixing plate has small volume, and can avoid occlusion interference and the falling off of the appliance caused by the masticatory force of a patient.
The use method of the mandibular molar advancement device of the invention comprises the following steps:
(1) firstly implanting the micro-implant nail, adjusting the angle between the main body of the micro-implant nail and the buccal side of the second molar on the left side of the lower jaw to be 15-20 degrees, and then fixing the main body on the implantation part by using a screw rod.
(2) And welding one end of the L-shaped rod with the arch-shaped rods on the first and second retention plates, and then respectively bonding the bottom plates of the first and second retention plates on the second and third molar buccal sides on the left side of the lower jaw.
(2) Placing the retention tube, enabling the other end of the L-shaped rod to penetrate through the crown root of the retention tube to the cavity, sleeving the outer side of the stainless steel square wire with a push spring, enabling one end of the stainless steel square wire to penetrate through the proximal-distal middle of the retention tube to the cavity and then to be bent towards the root, enabling the other end of the stainless steel square wire to penetrate through the proximal-distal middle of the micro-implant nail to the cavity, and enabling the tail end of the micro-implant nail.
If the mesial inclination of the second and third molars on the left side of the lower jaw is found in clinical treatment, the knob can be screwed down, the retention tube is pressed downwards through the knob, the retention tube is vertically downwards moved, and thus the mesial inclination of the second and third molars is avoided during the advancing process due to the tooth closing force. For the molars initially with mesial oblique teeth, 0.018 x 0.025niti square wires are inserted into the mesial-distal cavity of the retention tube at one end and fixed at the head of the screw of the micro-implant nail at the other end, so that the rotational moment couple can be generated for the oblique molars to promote the erection of the oblique molars.
Claims (6)
1. A mandibular molar advancement device, adapted for use in the absence of a mandibular first molar and in the presence of mandibular second and third molars on the same side of the mandibular first molar, characterized in that the device comprises a first retention plate attached to the buccal surface of the mandibular second molar, a second retention plate attached to the buccal surface of the mandibular third molar, an L-shaped bar, a retention tube positioned in the direction of the second molar root, a stainless steel square wire, a compression spring and a micro-implant screw positioned on the buccal side of the second molar; one end of the L-shaped rod is welded on the first and second retention plates, the other end of the L-shaped rod extends towards the direction of the tooth root and penetrates through the retention tube, the stainless steel square wire penetrates through the push spring, one end of the stainless steel square wire is fixed on the retention tube, and the other end of the stainless steel square wire is in sliding connection with the micro-implant nail; the micro-implant nail comprises a screw rod, a main body and an implant part, wherein the main body is provided with a proximal-distal middle cavity and a crown-root cavity, and one end of the screw rod penetrates through the crown-root cavity of the main body and then is connected with the implant part through threads; the mandibular molar advancement device further comprises a hollow knob which is sleeved outside the L-shaped rod and is in threaded connection with the L-shaped rod; the retention tube is provided with a mesial-distal cavity and a coronal-radicular cavity.
2. The mandibular molar advancement device of claim 1, wherein one end of the square stainless steel wire is passed through the mesial cavity of the retention tube and then bent in the root direction and the other end of the square stainless steel wire is passed through the mesial cavity of the micro implant nail body.
3. The mandibular molar advancement device of claim 2, wherein one end of the L-shaped rod passes through the coronal axial cavity of the retention tube.
4. The mandibular molar advancement device of claim 3, wherein the push spring abuts the retention tube and the micro implant pin at each end.
5. The mandibular molar advancement device of claim 4, wherein the L-shaped bar fits into the coronal-coronal cavity of the retention tube and the stainless steel square wire fits into the mesial cavity of the retention tube and the mesial cavity of the micro implant.
6. The mandibular molar advancement device of claim 5, wherein the retention plate comprises a base plate attached to the buccal side of the tooth and an arcuate bar attached to the L-shaped bar at each end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648926.XA CN108703812B (en) | 2018-06-22 | 2018-06-22 | Mandibular molar advancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648926.XA CN108703812B (en) | 2018-06-22 | 2018-06-22 | Mandibular molar advancing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108703812A CN108703812A (en) | 2018-10-26 |
| CN108703812B true CN108703812B (en) | 2021-07-16 |
Family
ID=63872923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810648926.XA Expired - Fee Related CN108703812B (en) | 2018-06-22 | 2018-06-22 | Mandibular molar advancing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108703812B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110151340B (en) * | 2019-06-24 | 2021-03-12 | 四川大学 | Orthodontic device and orthodontic method for vertically and medially moving mandibular molar |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050221249A1 (en) * | 2004-04-05 | 2005-10-06 | Keles Ahmet O | Maxillary molar distalization jig |
| EP2881076B1 (en) * | 2013-12-06 | 2019-07-31 | 3M Innovative Properties Company | Labial attachment device for use with orthodontic auxiliary and lingual appliance system |
| CN205031374U (en) * | 2015-05-27 | 2016-02-17 | 北京圣玛特科技有限公司 | Just abnormal ware of rescuing that just abnormal dental arch silk and tooth of turning a millstone far moved |
| CN105662611B (en) * | 2016-02-26 | 2019-01-22 | 上海市徐汇区牙病防治所 | Mandibular premolar undesirable root traction device |
| CN205494042U (en) * | 2016-03-04 | 2016-08-24 | 黄颖荷 | Just abnormal little nail of planting |
| CN106473821A (en) * | 2016-11-24 | 2017-03-08 | 上海市徐汇区牙病防治所 | A kind of device closing upper jaw extraction of tooth space |
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2018
- 2018-06-22 CN CN201810648926.XA patent/CN108703812B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN108703812A (en) | 2018-10-26 |
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Granted publication date: 20210716 |