CN114176807B - Multifunctional micro-implant anchorage nail and design and manufacturing method thereof - Google Patents
Multifunctional micro-implant anchorage nail and design and manufacturing method thereof Download PDFInfo
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- CN114176807B CN114176807B CN202111512382.2A CN202111512382A CN114176807B CN 114176807 B CN114176807 B CN 114176807B CN 202111512382 A CN202111512382 A CN 202111512382A CN 114176807 B CN114176807 B CN 114176807B
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- nail
- anchorage
- nail body
- auxetic
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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
- A61C7/002—Orthodontic computer assisted systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0037—Details of the shape
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0093—Features of implants not otherwise provided for
- A61C8/0096—Implants for use in orthodontic treatment
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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
- A61C7/002—Orthodontic computer assisted systems
- A61C2007/004—Automatic construction of a set of axes for a tooth or a plurality of teeth
Abstract
The invention provides a multifunctional micro-implant anchorage nail and a design and manufacturing method thereof. The anchorage nail comprises a nail body with a tip end, wherein threads are arranged on the nail body, an auxetic microporous structure area is arranged on one side of the nail body, and a non-auxetic microporous structure area is arranged on the other side of the nail body. According to the invention, the stretching and non-stretching microporous structures are introduced into the design of the anchorage nail body, and the design enables the nail body to stretch and expand to deform at the tension side and to press and expand to deform at the compression side when the nail body is subjected to the tangential stretching orthodontic force to bend and deform, so that the anchorage nail disclosed by the invention expands and deforms under the orthodontic force, and the function of improving the stability of the anchorage nail in the body is realized. When the anchorage nail needs to be detached, the anchorage nail is reversely bent by applying a reverse and normal distortion force opposite to the direction of the tension force to the nail body, so that the tension side of the anchorage nail is pulled and contracted to deform, the compression side of the anchorage nail is compressed and deformed, the compression deformation is integrally realized, and the nail body is easy to remove.
Description
Technical Field
The invention relates to the technical field of orthodontic appliances, in particular to a multifunctional micro-implant anchorage nail and a design and manufacturing method thereof.
Background
Orthodontic treatment is to adjust the coordination between upper and lower jaws, between upper and lower teeth, and between teeth and jaws through an orthodontic device, and finally realize the balance, stability and beauty of the oromandibular system. In the treatment process, the orthodontic device is worn inside or outside the oral cavity to apply proper force to teeth, alveolar bones and jawbones, so that the teeth, the alveolar bones and the jawbones are physiologically moved, and the malocclusion is corrected. It is known from the theory of mechanical equilibrium that any force applied to the teeth to be treated to move the teeth must generate a force with the same magnitude and the opposite direction at the same time, and the condition of providing the counterforce is called as anchorage, and the foundation of providing the force in the anchorage tooth treatment is provided, wherein the micro-implant anchorage nail is an absolute anchorage, can simplify the mechanical mechanism of the orthodontic treatment, and is widely applied to the orthodontic treatment.
In the orthodontic treatment process, the anchorage nail is like a fulcrum and is firmly fixed by the anchorage nail, and the source of force is provided for other teeth to move, so the anchorage nail is required to be firmly fixed. However, in clinic, the loosening and the extrusion of the anchorage nail are frequently found, even the orthodontic treatment fails, and great pain is brought to the patient. Clinical follow-up finds that anchorage nail loosening is related to inflammation of surrounding bone tissues and poor bone reconstruction effect. Therefore, the in-vivo stability of the micro-implant anchorage nail is improved, and the micro-implant anchorage nail has important significance for orthodontics treatment technology. And as a temporary implant, it is an aspect that must be considered how to ensure that the implant has good easy-to-take-out performance while improving stability, and to reduce pain of patients during treatment as much as possible.
Disclosure of Invention
What this application solved is how to improve the technical problem of little planting anchorage nail stability in vivo, and then provides one kind and has good stability in vivo and easy takeout nature, can effectively alleviate multi-functional little planting anchorage nail of surrounding bone tissue and soft tissue inflammation.
The technical scheme adopted by the application for solving the technical problems is as follows:
the utility model provides a multi-functional micro-implant anchorage nail, includes the nail body that has the tip be provided with the screw thread on the nail body one side of nail body is provided with the micro-porous structure area of drawing and expanding the opposite side of nail body is provided with the micro-porous structure area of non-drawing and expanding.
The nail body is connected with the top cap through the neck post part.
The anti-inflammatory and bacteriostatic medicines and/or bone growth promoting factors are loaded in the auxetic microporous structure and the non-auxetic microporous structure.
The rib width, the pore diameter, the pore shape, the connectivity between pores, the pore density distribution and the pore distribution mode of the auxetic and non-auxetic microporous structures forming the nail body can be customized according to the individual requirements of patients, the expansion deformation of the anchorage nail under the bearing force is realized while the clinical requirements of the anchorage nail strength are met, and the stability of the anchorage nail in the body is improved.
The design method of the multifunctional micro-implant anchorage nail comprises the following steps: (1) Establishing an orthodontic treatment finite element analysis model according to the CT data of the oral cavity of the patient and the orthodontic treatment scheme; (2) carrying out grid discretization on the model; (3) Setting a model loading condition according to an orthodontic treatment surgical scheme; (4) analyzing to obtain the stress condition of the anchorage nail; (5) And setting the grid cells of the nail body part under the action of tension to be in a stretching micropore structure, and setting the grid cells of the nail body part under the action of pressure to be in a non-stretching micropore structure to obtain the micro-implant anchorage nail.
According to the design method of the multifunctional micro-implant anchorage nail, the size of the grid in the step (2) is set according to the requirements of finite element calculation precision and 3D printing manufacturing precision.
The integral porous nail body without screw thread is first manufactured by additive manufacturing technology, and then screw thread is cut by subtractive manufacturing.
The novel multifunctional micro-planting anchorage nail and the design and manufacturing method thereof have the advantages that:
according to the invention, an auxetic and non-auxetic microporous structure is introduced into the design of an anchorage nail body, a thread is arranged on the nail body, an auxetic microporous structure area is arranged on one side of the nail body, and a non-auxetic microporous structure area is arranged on the other side of the nail body; the auxetic microporous structure is a negative Poisson ratio microporous structure, has a negative Poisson ratio effect, can generate expansion deformation in the direction vertical to the stress direction under the action of tensile load, and can generate contraction deformation in the direction vertical to the stress direction under the action of compressive load. The non-auxetic porous structure is a positive Poisson ratio porous structure, has a positive Poisson ratio effect, can be subjected to contraction deformation in a direction vertical to a stress direction under the action of tensile load, and can be subjected to expansion deformation in the direction vertical to the stress direction under the action of compressive load. After the nail body is implanted into a bone, the anchorage nail can be subjected to the tangential tension orthodontic force effect of the traction rubber band and the spring in the orthodontic treatment process, and the nail body can be bent and deformed, so that one side of the nail body is subjected to the tension force effect, and the other side of the nail body is subjected to the pressure force effect. When the nail is implanted, the expansion micropore structure area is positioned at one side of the nail body under the action of tensile force, and the expansion micropore structure area deforms under the action of tensile force to extrude surrounding bone tissues and improve the anti-pulling capacity; the non-auxetic micropore structure area is positioned on one side of the nail body under the action of pressure, and the non-auxetic micropore structure area generates pressure expansion deformation under the action of pressure to extrude surrounding bone tissues and improve the anti-pulling capacity. Due to the ingenious design of the microporous structure, when the nail body is under the action of tangential tension orthodontic force, the tension side generates stretching deformation, and the compression side generates compression deformation, so that the expansion deformation of the anchorage nail under the action of orthodontic force is realized, and the function of improving the stability of the anchorage nail in the body is realized. When the anchorage nail needs to be detached, the anchorage nail is reversely bent by applying a reverse and normal distortion force opposite to the stretching and orthodontic force direction to the nail body, so that the tension side of the anchorage nail is stretched and contracted to deform, and the compression side of the anchorage nail is compressed and deformed, so that the whole nail body is compressed, and the nail body is easy to remove.
The microporous structure of the anchorage nail body part can bear anti-inflammatory and antibacterial drugs, promote bone tissue growth factors and the like, and after the drugs and the factors are released, the porous space of the nail body is favorable for cell attachment and proliferation, induces bone ingrowth and osseointegration, and can further improve the anchorage nail fixing effect. Meanwhile, the multi-hole design of the anchorage nail body does not influence the free design of the cervical column part, the top cap and the nail tip, and the anchorage nail body can be correspondingly designed according to the clinical practical application and has wide application range in orthodontic treatment.
In order to make the technical scheme of the novel multifunctional micro-implant anchorage nail and the design and manufacturing method thereof more clear and obvious, the invention is further explained by combining the attached drawings and the specific implementation mode.
Drawings
Fig. 1 shows a schematic diagram of orthodontic treatment;
FIG. 2 is a simplified diagram of the stress of the anchorage pin during orthodontic treatment;
fig. 3 shows a structural diagram of the multifunctional micro-implant anchorage nail of the invention and the stress condition of the nail body part consisting of the micro-porous structure in orthodontic treatment; wherein A is the micropore nail body area under the action of tension under the action of orthodontic force, and B is the micropore nail body area under the action of compression under the action of orthodontic force;
as shown in fig. 4, the deformation of the a-side nail body region composed of the auxetic microporous structure under the action of tensile force and the deformation of the B-side nail body region composed of the non-auxetic microporous structure under the action of pressure during orthodontic treatment are shown, and the auxetic and non-auxetic porous structures are not limited to the porous structures shown in the figure and can be any auxetic and non-auxetic porous structures;
as shown in fig. 5, after the orthodontic treatment is finished, the deformation condition of the nail body area at the side a composed of the expansion micropore structure under the action of the tangential tension force opposite to that in the orthodontic treatment process is applied to the anchorage nail, and the deformation condition of the nail body area at the side B composed of the non-expansion micropore structure under the action of the tension force, wherein the expansion and non-expansion porous structures are not limited to the porous structures shown in the figure, and can be any expansion and non-expansion porous structures;
FIG. 6 is a diagram illustrating the effect of the expansion deformation of the anchorage nail body under the action of orthodontic force;
FIG. 7 is a diagram showing the effect of the deformation of the anchorage nail body of the present invention caused by the negative and positive distortion.
Wherein the reference numerals are:
1-anchorage nail; 2-a spring; 3-teeth; 4-an orthodontic device; 5-bone tissue; 11-top cap; 12-a cervical spine portion; 13-a nail body; 14-tip.
Detailed Description
The embodiment provides a multifunctional micro-implant anchorage nail for orthodontic treatment, as shown in fig. 1 and 2, the anchorage nail 1 is composed of a nail body 13, a cervical column part 12 and a top cap 11, the top cap 11 is connected with the nail body 13 through the cervical column part 12, and one end of the nail body 13, which is far away from the cervical column part 12, is provided with a tip 14.
In the anchorage nail 1 of the present embodiment, the nail body portion is provided with the microporous structure, as shown in fig. 3, the microporous structure is distributed in the integral nail body; as an alternative embodiment, the microporous structure may also be distributed only on the surface portion of the nail body. The screw thread of the nail body 13 can adopt a porous structure or a non-porous solid structure. As shown in figure 1, the anchorage pin 1 can be subjected to the tangential tension orthodontic force of the spring 2 and/or the traction rubber band during the orthodontic treatment of the tooth 3; while also being subject to reaction forces from the surrounding bone tissue 5, as shown in fig. 2. Therefore, the anchorage nail 1 is in a mechanical environment of bending loading in the orthodontic treatment process, one side (side A) of the nail body part is under the action of tension, and one side (side B) of the nail body part is under the action of compression. According to the invention, the expansion micropore structure and the non-expansion micropore structure are respectively introduced into the nail body areas at the A side and the B side, as shown in fig. 4, when the designed nail body is subjected to tangential tension orthodontic force, the tension side generates expansion deformation, and the compression side generates compression expansion deformation. Thereby realizing the expansion deformation of the whole nail body 13, and as shown in fig. 6, the stability of the anchorage nail in the orthodontic treatment process can be improved. When the anchorage nail body designed by the invention is subjected to the tangential tension opposite to that in the orthodontic treatment process, the A side generates compression deformation and the B side generates tension deformation, and the structure is shown in figure 5. Thereby realizing the contraction and deformation of the whole nail body, and as shown in figure 7, the anchorage nail can be easily taken out after the orthodontic treatment is finished. The auxetic structure and the non-auxetic structure can be uniformly distributed porous structures or gradient porous structures, and the rib width, the pore diameter and the pore shape can be designed as required.
The material used for the anchorage nail in the embodiment can be metal, polymer and degradable medical grade material with good medical biocompatibility.
In the multifunctional micro-implant anchorage nail for orthodontic treatment according to the embodiment, the method for designing the nail body to be porous is as follows: (1) Establishing an orthodontic treatment finite element analysis model according to the CT data of the oral cavity of the patient and the orthodontic treatment scheme; (2) Carrying out grid discretization on the model, wherein the size of the grid can be set according to the requirements of finite element calculation precision and 3D printing manufacturing precision; (3) Setting a model loading condition according to an orthodontic treatment surgical scheme; (4) analyzing to obtain the stress condition of the anchorage nail; (5) And setting the grid cells of the nail body part under the action of tension to be in a stretching micropore structure, and setting the grid cells of the nail body part under the action of pressure to be in a non-stretching micropore structure to obtain the micro-implant anchorage nail.
In the manufacturing process of the anchorage nail with the microporous nail body, aiming at the small characteristic forming process of threads, the integral porous nail body without threads can be manufactured by adopting an additive manufacturing technology, then the threads are cut by reducing material manufacturing, and finally the solid forming of the novel multifunctional micro-implant anchorage nail is realized with high precision.
In the embodiment, the aperture range of the anchorage nail is preferably 10-1000 μm, the porosity range is preferably 5-84%, and the connectivity can reach 100%.
The nail body of the anchorage nail in the embodiment can be of a whole porous structure or a combined structure of the porous structure and a solid structure, the aperture, the hole shape and the rib width of the contained porous structure, the connectivity between holes and the deformation capacity under the load can be designed according to the actual requirements of orthodontic treatment, and the anchorage nail has wide application prospect in the field of orthodontic treatment.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.
Claims (4)
1. A multifunctional micro-implant anchorage nail is characterized by comprising a nail body with a tip end, wherein a thread is arranged on the nail body, an auxetic microporous structure area is arranged on one side of the nail body, and a non-auxetic microporous structure area is arranged on the other side of the nail body; the anti-inflammatory and antibacterial drugs and/or bone growth promoting factors are loaded in the auxetic microporous structure and the non-auxetic microporous structure; the design method of the multifunctional micro-implant anchorage nail comprises the following steps: (1) Establishing an orthodontic treatment finite element analysis model according to the CT data of the oral cavity of the patient and the orthodontic treatment scheme; (2) carrying out grid discretization on the model; (3) Setting a model loading condition according to an orthodontic treatment surgical scheme, and simulating the tangential tension orthodontic force of a spring and/or a traction rubber band; (4) analyzing to obtain the stress condition of the anchorage nail; (5) And setting grid cells of the nail body part under the action of tension as an auxetic micropore structure, and setting grid cells of the nail body part under the action of pressure as a non-auxetic micropore structure to obtain the micro-implant anchorage nails, wherein the communication rate of the anchorage nails reaches 100%.
2. The multifunctional micro-implant anchorage nail of claim 1, wherein the auxetic microporous structure region is located in a portion of the nail body where the nail body is under tension during orthodontic treatment; the non-auxetic micro-porous structure area is positioned on the nail body part of the nail body under the action of pressure.
3. The multi-functional micro-implant anchorage nail of claim 2, further comprising a top cap connected with the nail body through a cervical portion.
4. The multifunctional micro-implant anchorage nail according to claim 3, wherein the rib width, the pore diameter, the pore shape, the connectivity between pores, the pore density distribution and the pore distribution of the auxetic and non-auxetic microporous structures forming the nail body can be customized according to the individual requirements of patients, the anchorage nail can expand and deform under the action of bearing force while meeting the clinical requirements of the anchorage nail strength, and the stability of the anchorage nail in the body is improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111512382.2A CN114176807B (en) | 2021-12-08 | 2021-12-08 | Multifunctional micro-implant anchorage nail and design and manufacturing method thereof |
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| CN202111512382.2A CN114176807B (en) | 2021-12-08 | 2021-12-08 | Multifunctional micro-implant anchorage nail and design and manufacturing method thereof |
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| CN114176807A CN114176807A (en) | 2022-03-15 |
| CN114176807B true CN114176807B (en) | 2023-01-24 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505678A (en) * | 2006-08-01 | 2009-08-12 | 维特利·邦达 | Dental implant system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102232875B (en) * | 2010-04-21 | 2013-05-01 | 国立台北科技大学 | Threaded biomedical implant structure and selective surface treatment method thereof |
| US8414654B1 (en) * | 2011-11-23 | 2013-04-09 | Amendia, Inc. | Bone implants and method of manufacture |
| CN202821672U (en) * | 2012-09-13 | 2013-03-27 | 杭州西湖生物材料有限公司 | Orthodontics micro-type self-tapping type anchorage nail |
| CN105555517B (en) * | 2013-03-15 | 2018-09-21 | 哈佛大学校长及研究员协会 | Low porosity auxetic sheet material |
| CN107898495B (en) * | 2017-07-24 | 2021-03-12 | 北京航空航天大学 | Bone nail with auxetic structure |
| CN208989195U (en) * | 2018-03-14 | 2019-06-18 | 华南理工大学 | A kind of gradient porous personalized tooth-implanting of NiTi memorial alloy |
| CN108236508B (en) * | 2018-03-14 | 2023-12-15 | 华南理工大学 | NiTi memory personalized self-expansion thread groove embedded porous structure implant and manufacturing method thereof |
| CN109538596A (en) * | 2018-11-22 | 2019-03-29 | 北京理工大学 | A kind of nail with negative poisson's ratio characteristic |
| CN112472335A (en) * | 2020-12-02 | 2021-03-12 | 广州恒尚科技有限公司 | Artificial implant tooth root based on shape memory alloy porous microstructure |
| CN113332003A (en) * | 2021-04-25 | 2021-09-03 | 西安交通大学 | Anti-loosening bone fixation implant and design method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505678A (en) * | 2006-08-01 | 2009-08-12 | 维特利·邦达 | Dental implant system and method |
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