CN113349966B

CN113349966B - Multi-root dental implant structure and manufacturing method thereof

Info

Publication number: CN113349966B
Application number: CN202110600301.8A
Authority: CN
Inventors: 陆科杰; 俞梦飞; 余晓雯; 叶冠琛; 叶鑫; 龚佳幸
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2023-03-21
Anticipated expiration: 2041-05-31
Also published as: CN113349966A

Abstract

The invention discloses a multi-root dental implant structure, which is characterized in that: the integrated structure comprises a plurality of root abutment integrated structures which are connected with each other. The bolt type assembled multi-dental implant structure is completely consistent with the multi-dental structure of a patient, can be completely matched with the alveolar fossa after the removal of the affected tooth, simplifies the clinical treatment process, greatly reduces the treatment period, can effectively prevent the atrophy and collapse of soft tissues after tooth removal, reduces the absorption of alveolar bones after tooth removal, and can improve the comfortable and beautiful effect of the patient. Because the bolt type assembled multi-root dental implant structure is completely matched with the dental socket of a patient and has higher initial stability, an operator does not need to adopt a special implantation technology to increase the initial stability, the technical operation requirements on the operator and the risk of postoperative patient infection can be greatly reduced, meanwhile, the osseointegration of the implant can be accelerated, and the success rate of the implantation is improved.

Description

Multi-root dental implant structure and manufacturing method thereof

Technical Field

The invention belongs to the technical field of oral medical instruments, and particularly relates to a structure of a plurality of implanted teeth and a manufacturing method thereof.

Background

With the improvement of economic level and the gradual maturity of implantation technology, the implanted denture is gradually accepted by more and more patients and becomes the most ideal repairing and fixing mode for patients with dentition defects, dentition deletion and the like.

The conventional planting method at present is delayed planting, which is generally 3-6 months after tooth extraction, namely, after the alveolar socket is completely healed, the implant is implanted, and then upper repair is completed. Compared with delayed planting, immediate planting is to implant an implant into an alveolar socket while extracting a tooth, and has attracted more and more attention due to the advantages of simplifying clinical treatment procedures, having short treatment period, being comfortable and beautiful, and the like, and has also been rapidly developed in recent years. The implant can not only effectively prevent the atrophy and collapse of soft tissues after tooth extraction and reduce the absorption of alveolar bone after tooth extraction, but also is beneficial to positioning the implant at an accurate three-dimensional position in a jaw bone by an operator in the process of implanting the implant in a first-stage clinical operation and is also beneficial to the later-stage recovery of the occlusion function taking repair as a guide.

At present, the traditional implant clinically used for immediate implantation operation is mostly conical or cylindrical, is not matched with the form of the dental extraction socket, the initial stability is difficult to be ensured, the part of the implant depth exceeding the original dental extraction socket is almost completely relied on for providing, an operator needs to adopt a special implantation technology to obtain enough initial stability, the technical operation requirement on the operator and the risk of postoperative patient infection are increased, the insufficient initial stability influences the bone healing process around the implant, thereby the bone healing rate of the implant is reduced and the success rate is even influenced

Disclosure of Invention

In order to overcome at least one of the defects (shortcomings) of the prior art, the invention provides a multi-root dental implant structure, which comprises a plurality of root-base integrated structures, wherein the root-base integrated structures are connected with each other. The integrated structure of the tooth root and the base platform comprises a tooth root and a base platform which are integrally molded.

Furthermore, a countersunk hole is arranged on the abutment farthest from the gum.

Furthermore, a first positioning pin hole is formed in the abutment farthest from the gum. At least one first positioning pin hole is arranged on the base station farthest from the gum

Furthermore, the integrated upper structure of the tooth root base station is provided with a threaded hole corresponding to the countersunk hole. And the other integrated tooth root base stations are structurally provided with threaded holes corresponding to the counter bores on the base station farthest from the gum.

Furthermore, the integrated upper structure of the tooth root base station is provided with a positioning pin hole corresponding to the first positioning pin hole. And the other integrated tooth root abutments are structurally provided with positioning pin holes corresponding to the first positioning pin holes on the abutments farthest from the gum.

Furthermore, the screw is arranged in the screw hole, and the screw passes through the counter bore and then is screwed into the threaded hole.

Further, the screw is an L-shaped screw. The screw can be turned after being screwed into the head part to form an L shape, and can prevent the screw from falling off.

Furthermore, the positioning pin is arranged between the first positioning pin hole and the other positioning pin holes.

Furthermore, a groove is formed between the counter bore and the first positioning pin hole. The groove can be used for placing the turning part of the screw, and the turning part of the screw can also press the positioning pin to prevent the positioning pin from falling off.

The invention also provides a method for manufacturing a multi-root dental implant structure, which comprises the following steps:

s1, establishing a tooth planting model;

s2, dividing the abutment and the tooth root part according to the number and the direction of the tooth roots, and dividing into an integrated structure of the tooth roots and the abutment matched with the number of the tooth roots.

And S3, assembling different tooth roots and abutment integrated structures after the part printing is finished. Compared with the background technology, the invention has the following beneficial effects:

1, the bolt type assembled multi-dental implant structure of the invention is completely consistent with the multi-dental structure of a patient, can be completely matched with the alveolar fossa after the extraction of the affected tooth, simplifies the clinical treatment process, greatly reduces the treatment period, can effectively prevent the atrophy and collapse of soft tissues after the extraction of the tooth, reduces the absorption of alveolar bones after the extraction of the tooth, and can improve the comfortable and beautiful effect of the patient.

2, because many implant tooth structures of bolt formula equipment match with patient's alveolus completely, have higher initial stability, so the art person need not adopt special implantation technique to increase initial stability, but the technical operation requirement and the risk that postoperative patient infects of significantly reduced to the art person can accelerate the osseointegration of implant simultaneously, improve the planting success rate.

Drawings

FIG. 1 is an exploded schematic view of a planting structure of the present invention;

FIG. 2 is a schematic view of the planting structure of the present invention after assembly;

FIG. 3 is a schematic view of the integrated structure of the mesial root and abutment of the present invention;

FIG. 4 is a schematic view of the integrated structure of the distal root and the abutment of the present invention;

FIG. 5 is a schematic view of a planting structure according to an embodiment of the present invention (L-shaped screw);

FIG. 6 is a cross-sectional view of the integrated structure 2 (L-shaped screw) according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an L-shaped screw according to an embodiment of the invention.

Wherein: 1 is a near-middle tooth root and abutment integrated structure, 2 is a far-middle tooth root and abutment integrated structure, 3 is a tooth crown, 4 is a first positioning pin hole, 5 is a counter bore, 6 is a second positioning pin hole, 7 is a threaded hole, 8 is a positioning pin, and 9 is a screw.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; it will be understood by those skilled in the art that certain well-known structures and descriptions thereof may be omitted. The medicines are all sold on the market as yet unnoticed.

A plug type assembled multi-tooth implant structure based on SLM molding and a molding method thereof can greatly improve the initial stability of an implant and shorten the treatment period of a patient, and simultaneously improve the success rate of the implant and relieve the pain of the patient.

A plug type assembled multi-root dental implant structure based on SLM forming comprises a partial abutment integrated structure used for implanting a dental root of a dental socket implant and contacting with a gum and a dental crown part used for normally playing a chewing function. The integrated structure comprises a tooth, a part of an abutment and a connecting part of the abutment and the abutment, wherein the abutment is provided with a counter bore and at least one first positioning pin hole, and the tooth root is provided with a threaded hole and a second positioning pin hole corresponding to the first positioning pin hole; the screw passes through the counter bore and then screws into the threaded hole, and a positioning pin is arranged between the first positioning pin hole and the second positioning pin hole.

A plug pin type assembling multi-implant tooth structure forming method based on SLM forming comprises the following steps:

(1) Building a plurality of implant tooth models in a bolt type assembly mode according to teeth of a patient;

(2) After the implant model is obtained, the model divides the abutment and the tooth root part according to the number and the direction of the tooth roots, and the abutment and the tooth root part are divided into an integrated structure of the tooth roots and the abutment which is matched with the number of the tooth roots and a tooth crown part for normally playing the chewing function.

(3) After the part is printed, firstly, the tooth root and abutment integrated structure is cut off from the substrate, and the subsequent processing of the threaded hole and the positioning pin hole is completed.

(5) And assembling different root and abutment integrated structures.

The method for establishing the line implant model comprises the following steps:

firstly, CT scanning is carried out on teeth of a patient, after the CT scanning is carried out, layering processing is carried out on a CT file, the teeth part and the soft tissue part are divided according to different gray values, and after the CT image is processed, an implant model of the whole tooth is obtained.

The dental crown needs to be removed by a layer of thickness on the surface based on the original dental crown for later porcelain baking. And the tooth root and abutment integrated structure and the tooth crown are formed in printing. The fixation is realized by positioning pins and screws, namely, corresponding counter bores and positioning pin holes are processed in different integrated structures of the tooth root and the abutment.

Due to the principle of layered forming, the formed part of the metal 3D printing technology is not limited by the space complexity of the part, and any complex curved surface in the space can be formed. The Selective Laser Melting (SLM) is used as one of metal 3D printing, the elastic modulus and the mechanical property of the implant can be correspondingly changed by adjusting the microstructure of the implant with high precision, the matching with human bone tissues is realized, the biomechanical property is further improved on the basis of ensuring the proper physiological load, the manufacturing mode perfectly solves the problems that the traditional process is difficult to accurately copy the tooth root form and accurately control the pore size and the porosity of a porous titanium structure, and the generation of novel multiple implanted teeth which are individually customized for a patient becomes practical.

Example 1:

as shown in fig. 1,2,3, the present embodiment provides a plug type assembled multi-dental implant structure based on SLM molding, which comprises a near middle root and abutment integrated structure 1, a far middle root and abutment integrated structure 2, and a crown 3; a

counter bore

5 and 1 first positioning pin hole 4 are arranged on the base station of the far middle tooth root and base station integrated structure 2, and a threaded hole 7 and a second positioning pin hole 6 corresponding to the first positioning pin hole are processed on the tooth root of the near middle tooth root and base station integrated structure 1; the inverted cone-shaped screw 9 is screwed into the threaded hole 7 after screwing through the counter bore 5, and a positioning pin 8 is arranged between the first positioning pin hole and the second positioning pin hole. In fig. 5,6, a rectangular groove is formed between the counter bore 5 and the first positioning pin hole 4, and the inverted cone-shaped screw can be replaced by an L-shaped screw (see fig. 7), so that the fixation and stability of the implant can be improved.

Example 2:

the embodiment provides a method for forming a plug-type assembled multi-dental implant structure of embodiment 1, the method is based on SLM forming, and the specific method includes the following steps:

1. first, the personalized implant is modeled according to the teeth of the patient.

A CT scan of the patient's teeth is first required. After CT scanning, the CT file is subjected to layering processing, and the tooth part and the soft tissue part are divided according to incompatible gray values. After the CT image is processed, a model of the whole tooth can be obtained.

2. After the tooth model is obtained, the tooth model is divided into the same number of tooth root and abutment integrated

structures

1 or 2 and tooth crowns 3 according to the number of the tooth roots. The integrated tooth root is used for being implanted into a tooth socket after an affected tooth is removed and is responsible for fixing the whole tooth, and the abutment part is contacted with the tooth socket part to play a role in sealing the lower tooth root. The dental crown is used for normal chewing function.

Since the surface of the tooth finally needs porcelain, the inner dental crown needs to be removed by a layer of thickness on the surface based on the original dental crown for the subsequent porcelain.

3. After the model segmentation is completed, the positioning scheme of the part needs to be determined.

As can be seen from the structure in fig. 1, the required fixation is mainly realized by the positioning screw structure 9 and the positioning pin 8, and the stability between the integrated structures of different tooth roots and the abutment can be ensured by the synergistic action of the two structures, so that the two structures are prevented from moving relatively after being combined.

4. After the part is printed, firstly cutting the integrated structure of the tooth root and the base platform from the substrate, then processing all the threaded holes and the positioning pin holes, and finishing the processing process

5. And a screw passes through the counter bore and then is screwed into the threaded hole, and a positioning pin is arranged between the first positioning pin hole and the second positioning pin hole, so that different tooth roots and abutment integrated structures are assembled.

Claims

1. A multi-root dental implant structure is characterized by comprising a near middle tooth root and abutment integrated structure, a far middle tooth root and abutment integrated structure and a dental crown; the integrated structure of the near middle tooth root and the abutment and the integrated structure of the far middle tooth root and the abutment comprise tooth roots, partial abutments and connecting parts of the tooth roots and the partial abutments; the abutment of the integrated structure of the far tooth root and the abutment is the abutment farthest from the gum; a counter bore and 1 first positioning pin hole are formed in the abutment of the far-middle tooth root and abutment integrated structure, and a threaded hole and a second positioning pin hole corresponding to the first positioning pin hole are machined in the tooth root of the near-middle tooth root and abutment integrated structure; the inverted cone-shaped screw is screwed into the threaded hole after passing through the counter bore, and a positioning pin is arranged between the first positioning pin hole and the second positioning pin hole.

2. A multi-root dental implant structure according to claim 1, wherein: the screw is an L-shaped screw.

3. A multi-root dental implant structure according to claim 1, wherein: a groove is formed between the counter bore and the first positioning pin hole.

4. A method for manufacturing a multi-root dental implant structure comprises the following steps:

s1, establishing a tooth planting model;

s2, dividing the abutment and the tooth root part according to the number and the direction of the tooth roots, and dividing into an integrated structure of the tooth roots and the abutment, wherein the number of the tooth roots is matched with that of the tooth roots;

s3, after the printing of the parts is completed, assembling the integrated structure of the proximal tooth root and the abutment and the integrated structure of the distal tooth root and the abutment in the multi-root dental implant structure of claim 1.