CN108245267A - A kind of tooth implant of built-in detachable permanent magnet - Google Patents

Abstract

The invention discloses a dental implant with a built-in detachable permanent magnet. The dental implant body is axially provided with a unidirectional through cavity, the cavity is provided with a permanent magnet, and the upper end of the cavity is opened and sealed. The invention can regulate the activity of osteoblasts through the magnetic field generated by the permanent magnet, promote the formation of new bone tissue, thereby promoting the osseointegration of bone tissue and the implant; and it is more convenient and safer than an external magnetic field. The internal cavity is closed, which can prevent the impact of the permanent magnet components on the bone tissue, and also prevent the gum tissue from entering the internal cavity; the built-in magnetic field of the dental implant can concentrate the magnetic field around the implant, and can continuously stimulate the new bone. The growth of tissue can effectively improve the degree of integration between the dental implant and bone tissue, and shorten the time to achieve a stable bone structure; when the closed screw is removed, the permanent magnet can continue to remain in the implant, so that the implant can continue to generate a magnetic field. Produces a long-lasting growth-promoting effect on bone tissue.

Description

A dental implant with a built-in detachable permanent magnet

technical field

The invention relates to the field of oral clinical care, in particular to a dental implant with a built-in detachable permanent magnet.

Background technique

At present, among oral patients, the proportion of tooth and bone defects caused by inflammation and trauma is increasing year by year. At the same time, the aging of my country's population is accelerating, and the incidence of various oral tooth loss and periodontal bone loss caused by natural aging is also increasing rapidly. Oral tooth and bone defects will bring a lot of inconvenience to patients' masticatory function and normal life, and have become a major problem that seriously affects people's healthy life.

In oral clinical care, artificial titanium-based implants have been used to restore missing teeth and restore tooth function. During implant placement, the quality of the rebuilt new bone around the implant directly affects the firmness of its osseointegration with the dental implant. If the amount of rebuilt new bone is insufficient or the quality is not high, the implant will loosen and fall off.

The patent application with the application number CN201080017194.6 discloses a device for dental implants, which is used together with temporary screws made of NdFeB permanent magnets to generate a magnetic field suitable for helping bones heal quickly. The technical solution disclosed in this patent application is to directly make NdFeB permanent magnets into temporary screws for sealing implants, which need to be removed after one to several months of use, and then insert screws supported by metal materials to fix the cylinder . The above scheme has the following disadvantages: 1. Since the temporary screws are made of NdFeB permanent magnets, the surface of the temporary screws must be covered with a polymer coating to avoid adverse effects of the NdFeB component on the periodontal tissue. However, since the screws need to be screwed into the implant, The friction between the screw and the implant will destroy the polymer coating on the surface, thereby exposing the permanent magnet and causing it to directly contact with the body fluid or mucous membrane in the oral cavity, which will affect the biological safety of the implant. It will affect the health of the human oral cavity; 2. The brittleness of the NdFeB permanent magnet itself is large, and the strength is not enough to meet the strength requirements of the screw. It is easy to break when the screw is screwed into the implant; 3. The permanent magnet made of NdFeB For temporary screws, the screw head is exposed outside the implant, so the magnetic field generated in the upper part of the implant is stronger, while the magnetic field generated in the implant is weaker, resulting in uneven distribution of the magnetic field, which is not conducive to effective osseointegration around the lower part of the implant. 4. After the temporary screws are removed, the implant no longer has the magnetic field effect. If the osseointegration effect around the implant is not good, it cannot be used again for subsequent bone growth promotion.

Contents of the invention

The technical problem to be solved by the present invention is to provide a dental implant with a built-in detachable permanent magnet, which can promote the regeneration and reconstruction of new bone around the implant through the built-in magnetic field, and improve the quality of the reconstructed new bone.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a dental implant with a built-in detachable permanent magnet, including a dental implant body, and a unidirectional through cavity is arranged in the axial direction of the dental implant body, A permanent magnet is arranged in the cavity, and the opening at the upper end of the cavity is sealed by a closing screw.

Further, the permanent magnet is a neodymium iron boron magnet or a rare earth cobalt magnet.

Further, the outer surface of the dental implant body is provided with threads.

Further, the opening at the upper end of the cavity is provided with an internal thread and is threadedly connected with the closing screw.

Further, the dental implant body and the closing screw are made of metal.

As a preferred solution: the dental implant body and closure screw are made of pure titanium metal or titanium alloy.

Further, the material of the dental implant body and the closure screw is a non-degradable polymer material.

As a preferred solution: the dental implant body and closure screw are made of polyamide or polyether ether ketone

Further, the length of the permanent magnet is 1-8 mm, and the diameter is 0.3-1.0 mm.

The beneficial effect of the present invention is: the present invention builds a permanent magnet in the dental implant, and the magnetic field generated by the permanent magnet can regulate the activity of osteoblasts, promote the formation of new bone tissue, thereby promoting the osseointegration of bone tissue and the implant; and The present invention is more convenient than applying an external magnetic field and safer than using magnetic sealing screws. During the implantation of dental implants, the internal cavity is closed, which can prevent the overflow of permanent magnet components from affecting gingival tissue and bone tissue, and can also block body fluids and bone tissue. The tissue enters the internal cavity; the built-in magnetic field of the dental implant can concentrate the range of action of the magnetic field around the implant, which can continuously promote the growth of new bone tissue, or the superparamagnetic apatite powder filled around the implant Osteogenesis is promoted, which can effectively improve the degree of bonding between the dental implant and bone tissue, and shorten the time to achieve a stable bony structure; in the present invention, the permanent magnet and the closed screw are separated, and when the closed screw is removed, the permanent magnet can continue Keeping it in the implant allows the implant to continuously generate a magnetic field and produce a continuous effect on bone tissue growth; the permanent magnet can also be taken out and reused according to actual clinical needs.

Description of drawings

Fig. 1 is the exploded schematic diagram of the present invention;

Fig. 2 is the schematic diagram after planting of the present invention;

The marks in the figure are: 1-dental implant body, 2-permanent magnet, 3-closed screw.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

The dental implant of the present invention uses the static magnetic field as a physical intervention factor, which can regulate the activity of osteoblasts and promote the formation of new bone tissue, and considering that the range of external magnetic fields used in oral clinical care is not concentrated , inconvenient implementation and other shortcomings, combined the magnetic field with the dental implant in direct contact with bone tissue, and developed a dental implant with a growth-promoting effect on bone tissue. As shown in FIG. 1 , the present invention includes a dental implant body 1 , which is axially provided with a unidirectional through cavity, and a permanent magnet 2 is provided in the cavity, and the upper end of the cavity is sealed. In the present invention, the permanent magnet 2 is made of a magnetic bar made of NdFeB, rare earth cobalt or samarium cobalt. The design of the magnetic bar is determined according to the specifications of the dental implant required by the patient. The length is 8-12mm, the outer diameter range is 2-5mm, the length of the inner cavity is 3-8mm, the inner cavity diameter is 0.4-1.0mm, and the specification range of the magnetic rod is 1-8mm in length and 0.3-1.0mm in diameter. The minimum magnetic field strength at a distance of 1 mm from the outer surface of the dental implant body 1 is not less than 50 Gauss.

As shown in Figure 2, since the present invention arranges the permanent magnet 2 inside the dental implant body 1, after the dental implant is implanted, the range of action of the magnetic field generated by the built-in permanent magnet 2 is more concentrated around the dental implant, and the magnetic field keeps acting , can more effectively promote the formation of new bone tissue.

And because the permanent magnet 2 is sealed in the inner cavity of the dental implant body 1 by the sealing screw 3, the permanent magnet 2 is isolated from the outside world, the permanent magnet 2 and the gingival tissue will not interact with each other, and the components of the permanent magnet 2 will not overflow. The safety of the implant is affected, and the body fluid tissue is also blocked from entering the inner cavity. The upper end opening of the inner cavity of the dental implant body 1 is provided with an internal thread, and the closed screw 3 is threadedly connected with the dental implant body 1. After the bone tissue around the implant is formed, it is convenient for the clinic to place the permanent magnet 2 at any time according to the needs. The permanent magnet 2 can also be left in the implant to generate a permanent magnetic field effect after taking it out for repeated use, so as to continuously promote osseointegration and improve the stability of osseointegration.

Since the dental implant body 1 is finally left in the bone tissue and combined with the bone tissue, the connection between the dental implant body 1 and the bone tissue needs to be secure. By setting external threads on the outer surface of the dental implant body 1, adopt The dental implant body 1 is planted by rotating and screwing in. During the implantation process, the dental implant body 1 is subjected to a large force, which requires sufficient strength and cannot pollute the bone tissue. Therefore, the dental implant body 1 Generally, metal or non-degradable polymer materials are selected as the material of the material, titanium or titanium alloy is generally selected as the metal, and polyamide or polyether ether ketone is generally selected as the polymer material.

Example 1

The dental implant body 1 and the closing screw 3 are made of pure titanium metal. The permanent magnet built in the cavity of the dental implant body 1 is a NdFeB magnet. The length of the dental implant body 1 is 8 mm, the outer diameter is 3 mm, and the inner diameter is 0.8 mm. mm, the length of the internal thread of the inner cavity is 2mm, the length of the inner cavity is 3mm, the diameter of the inner cavity is 0.5mm, the length of the NdFeB magnet is 3mm, and the diameter of the NdFeB magnet is 0.5mm.

Example 2

The dental implant body 1 and the closing screw 3 are made of pure titanium metal. The permanent magnet built in the cavity of the dental implant body 1 is a NdFeB magnet. The length of the dental implant body 1 is 10mm, the outer diameter is 3.5mm, and the inner diameter is 1.0mm, the length of the internal thread of the inner cavity is 3mm, the length of the inner cavity is 5mm, the diameter of the inner cavity is 0.8mm, the length of the NdFeB magnet is 5mm, and the diameter of the NdFeB magnet is 0.8mm.

Example 3

The dental implant body 1 and the closing screw 3 are made of pure titanium metal. The permanent magnet built in the cavity of the dental implant body 1 is a rare earth cobalt magnet. The length of the dental implant body 1 is 8mm, the outer diameter is 3mm, and the inner diameter is 0.8mm , the length of the internal thread of the inner cavity is 2mm, the length of the inner cavity is 3mm, the diameter of the inner cavity is 0.5mm, the length of the rare earth cobalt magnet is 3mm, and the diameter of the rare earth cobalt magnet is 0.5mm.

Example 4

The dental implant body 1 and the closure screw 3 are made of pure titanium metal. The permanent magnet built in the cavity of the dental implant body 1 is a rare earth cobalt magnet. The length of the dental implant body 1 is 10 mm, the outer diameter is 3.5 mm, and the inner diameter is 1.0 mm. mm, the length of the internal thread of the inner cavity is 3mm, the length of the inner cavity body is 5mm, the diameter of the inner cavity is 0.8mm, the length of the rare earth cobalt magnet is 5mm, and the diameter of the rare earth cobalt magnet is 0.8mm.

Example 5

The dental implant body 1 and the closing screw 3 are made of titanium alloy (Ti6Al4V). The permanent magnet built in the cavity of the dental implant body 1 is a NdFeB magnet. The length of the dental implant body 1 is 8mm, the outer diameter is 3mm, and the inner diameter The length of the internal thread of the inner cavity is 2mm, the length of the inner cavity is 3mm, the diameter of the inner cavity is 0.5mm, the length of the NdFeB magnet is 3mm, and the diameter of the NdFeB magnet is 0.5mm.

Example 6

The dental implant body 1 and the closing screw 3 are made of titanium alloy (Ti6Al4V). The permanent magnet built in the cavity of the dental implant body 1 is a rare earth cobalt magnet. The length of the dental implant body 1 is 10mm, the outer diameter is 3.5mm, and the inner diameter The length of the internal thread of the inner cavity is 3 mm, the length of the inner cavity body is 5 mm, the diameter of the inner cavity is 0.8 mm, the length of the rare earth cobalt magnet is 5 mm, and the diameter of the rare earth cobalt magnet is 0.8 mm.

Example 7

The dental implant body 1 and the closing screw 3 are made of polyamide. The permanent magnet built in the cavity of the dental implant body 1 is a NdFeB magnet. The length of the dental implant body 1 is 8mm, the outer diameter is 3mm, and the inner diameter is 0.8mm , the length of the inner thread of the inner cavity is 2mm, the length of the inner cavity is 3mm, the diameter of the inner cavity is 0.5mm, the length of the NdFeB magnet is 3mm, and the diameter of the NdFeB magnet is 0.5mm.

Example 8

The dental implant body 1 and the closing screw 3 are made of polyetheretherketone. The permanent magnet built in the cavity of the dental implant body 1 is a rare earth cobalt magnet. The dental implant body 1 has a length of 10 mm, an outer diameter of 3.5 mm, and an inner diameter of 1.0mm, the length of the internal thread of the inner cavity is 3mm, the length of the inner cavity is 5mm, the diameter of the inner cavity is 0.8mm, the length of the rare earth cobalt magnet is 5mm, and the diameter of the rare earth cobalt magnet is 0.8mm.

Claims (9)

1. a kind of tooth implant of built-in detachable permanent magnet, including tooth implant ontology (1), it is characterised in that：The tooth kind The cavity unidirectionally penetrated through is axially arranged in implant ontology (1), is equipped with permanent magnet (2) in the cavity, cavity upper end opening passes through Closed screw (3) seals.

2. a kind of tooth implant of built-in detachable permanent magnet as described in claim 1, it is characterised in that：The permanent magnet (2) it is neodymium iron boron magnetic body or Sintered Rare Earth-cobalt Magnet.

3. a kind of tooth implant of built-in detachable permanent magnet as described in claim 1, it is characterised in that：The tooth implant Ontology (1) outer surface is equipped with screw thread.

4. a kind of tooth implant of built-in detachable permanent magnet as described in claim 1, it is characterised in that：The cavity upper end Opening is threadedly coupled equipped with internal thread and with closed screw (3).

5. a kind of tooth implant of built-in detachable permanent magnet as described in claim 1, it is characterised in that：The tooth implant The material of ontology (1) and sealing screw (3) is metal.

6. a kind of tooth implant of built-in detachable permanent magnet as claimed in claim 5, it is characterised in that：The tooth implant The material of ontology (1) and sealing screw (3) is pure titanium metal or titanium alloy.

7. a kind of tooth implant of built-in detachable permanent magnet as described in claim 1, it is characterised in that：The tooth implant The material of ontology (1) and sealing screw (3) is non-degradable high molecular material.

8. a kind of tooth implant of built-in detachable permanent magnet as claimed in claim 7, it is characterised in that：The tooth implant The material of ontology (1) and sealing screw (3) is polyamide or polyether-ether-ketone.

9. a kind of tooth implant of built-in detachable permanent magnet as claimed in claim 1 or 2, it is characterised in that：The permanent magnetism The length of body (2) is 1~8mm, a diameter of 0.3~1.0mm.