CN115068135B

CN115068135B - Manufacturing method of implant covered denture retention device

Info

Publication number: CN115068135B
Application number: CN202210614950.8A
Authority: CN
Inventors: 巴睿恺; 赵铱民; 李恺; 张燕; 邓再喜; 吴玉禄
Original assignee: Air Force Medical University of PLA
Current assignee: Air Force Medical University of PLA
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-07-14
Anticipated expiration: 2042-05-31
Also published as: CN115068135A

Abstract

The invention discloses a manufacturing method of a planting covering denture retention device, which comprises the following steps: manufacturing a retention rod on the crest of the alveolar ridge according to the intraoral model extraction result; according to the scanning structure, the PEEK retention card is manufactured by utilizing CAD/CAM, and when the PEEK retention card sleeve is connected outside the retention bar, the clearance between the retention bar and the PEEK retention card is 0.01mm. The invention utilizes the characteristics of good antibacterial property, wear resistance, no toxicity and the like of PEEK materials, particularly good retention force maintaining property, prepares the covered denture retention device for assisting retention of the integrated implant, obtains a novel retention device with uniform dental resultant force distribution and uniform and stable retention force, and effectively avoids the adverse effect of poor stress on the implant after the denture is worn for a long time.

Description

Manufacturing method of implant covered denture retention device

Technical Field

The invention belongs to the technical field of denture repair, and particularly relates to a manufacturing method of a fixture for implanting and covering a denture.

Background

Rod-clip-assisted retention of full-mouth covered dentures is one of the important methods of dentognathic restoration. The traditional pure titanium rod and the pure titanium sectional type retention card have relatively concentrated dental resultant force when the false tooth functions, can not realize the even distribution of the dental resultant force, and easily lead to the stress concentration of the implant due to uneven stress, thereby being unfavorable for the long-term stable retention of the implant in the mouth. In addition, after long-term use, the retention force of the pure titanium clip is obviously attenuated, and the relation between the clearance and the retention force between the retention rod and the retention clip is not clear, so that the retention force is difficult to ensure to be well and permanently obtained when the denture is worn initially. Experiments show that the retention force of the removable denture clasp made of PEEK material is maintained to be obviously superior to that of the pure titanium clasp.

The use of conventional complete dentures (conventional complete dentures, CCD) has been the only treatment for non-dental patients for a long time. The effectiveness of complete dentures is greatly affected by poor and unstable denture retention due to primary or secondary alveolar bone loss caused by long-term tooth deficiency. Poor complete denture retention directly or indirectly leads to mucosae tenderness, even ulceration, speech, dysarthria, chewing difficulties, and even malnutrition. In recent years, the development of planting technology brings hopes for patients. The implant-assisted retention of the over-denture (implant retained overdentures, IOD) greatly solves the problem of poor retention of the complete denture of the patient with severe alveolar ridge absorption. It has been suggested by experts that more than two implant-assisted retained over-dentures will be the preferred repair solution for non-dental patients.

The prior art is to place a finished pure titanium retention clip at the position of installing a pure titanium cutting rod between two implants, and the prior art has the following defects:

1. the stress is relatively concentrated, so that the stress cannot be uniformly dispersed to the whole cutting rod and transmitted to each implant, thereby generating stress concentration and being not beneficial to the long-term stable retention of the implants in the mouth;

2. the relation between the manufacturing gap between the retention rod and the retention card and the size of the retention force can be obtained is unclear, and standardized production can not be realized, so that adverse effects of adverse stress on the implant after the denture is worn for a long time and at the beginning of the denture can not be avoided.

Disclosure of Invention

The present invention is directed to a method for manufacturing a fixture for implanting an overlay denture, which solves the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a method of manufacturing a implant covered denture retention apparatus, the method comprising:

manufacturing a retention rod on the crest of the alveolar ridge according to the intraoral model extraction result;

according to the scanning structure, the PEEK retention card is manufactured by utilizing CAD/CAM, and when the PEEK retention card sleeve is connected outside the retention bar, the clearance between the retention bar and the PEEK retention card is 0.01mm.

As a preferable technical scheme in the invention, the cross section of the retention rod is rectangular, the two sides of the cheek tongue of the retention rod are parallel to each other, and the upper end of the retention rod is arranged in a chamfering way.

As a preferable technical scheme in the invention, the retention rod is a pure titanium retention rod.

The beneficial effects are that: the invention utilizes the characteristics of good antibacterial property, wear resistance, no toxicity and the like of PEEK materials, particularly good retention force maintenance characteristics, prepares an integrated implant auxiliary retention covering denture retention device, and searches the relation between the preparation gaps between different retention rods and retention cards and the obtained retention force through a tension experiment, thereby obtaining a gap value capable of generating the most suitable retention force, further obtaining a novel retention device with uniform dental resultant force distribution and uniform and stable retention force, and effectively avoiding the adverse effect of adverse stress on the implant after the denture is worn for a long time.

Drawings

FIG. 1 is a schematic view of a PEEK retention clip of the present invention in a telescoping connection with a retention bar;

FIG. 2 is a schematic view of the interface of the retention bar of the present invention;

FIG. 3 is an effect diagram of the retention bar of the present invention in use;

FIG. 4 is a graph showing the effect of the PEEK retention clip of the present invention in use.

1-a retention bar; 2-PEEK retention clip.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention.

Examples:

as shown in fig. 1 to 4, the present embodiment provides a method for manufacturing a implant covered denture fixing device, the method comprising:

according to the intraoral die extraction result, a retention bar 1 is manufactured on the crest of the dental alveolus, wherein the intraoral die extraction and the retention bar 1 are manufactured according to the prior art, and therefore, the details are not described here;

according to the scanning (scanning by a three-dimensional scanner) of the manufactured retention bar 1, STL files are obtained, according to the scanning structure, the PEEK retention card 2 is manufactured by CAD/CAM, and when the PEEK retention card 2 is sleeved outside the retention bar 1, the clearance between the retention bar 1 and the PEEK retention card 2 is 0.01mm. It should be noted that, in order to obtain the optimal gap, the maximum static friction force (i.e. dislocation force) corresponding to the rod clamping standard components of a plurality of groups of different gaps is measured by the tension machine at a displacement speed of 100mm/min, and as a result, when the gaps are found to be different, the dislocation forces are significantly different (n=5, p < 0.01), and when the rod clamping gap is 0.01mm, the optimal retention force is closest to 30N, so that 0.01mm is the optimal gap.

Studies have shown that the optimum retention force for implant-assisted retention over dentures is about 30N. The retention main force is friction force, and the dislocation force is maximum static friction force fmax=μf·n. Mu is the static friction coefficient and is a dimensionless constant which is related to the material property of two contact objects and the physical state of a contact surface and is not related to the size of the contact surface. The manufacturing gap between the retention bar and the retention clip directly affects the dislocation force of the denture. And experiments show that the retention force of the removable denture clasp made of PEEK material is maintained to be obviously superior to that of the pure titanium clasp.

The invention utilizes the characteristics of good antibacterial property, wear resistance, no toxicity and the like of PEEK materials, particularly good retention force maintenance characteristics, prepares an integrated implant auxiliary retention covering denture retention device, and searches the relation between the preparation gaps between different retention rods and retention cards and the obtained retention force through a tension experiment, thereby obtaining a gap value capable of generating the most suitable retention force, further obtaining a novel retention device with uniform dental resultant force distribution and uniform and stable retention force, and effectively avoiding the adverse effect of adverse stress on the implant after the denture is worn for a long time.

As a preferred embodiment in this embodiment, it should be further explained that the cross section of the retention bar 1 is rectangular, and the cheek and tongue sides (i.e. the inner side and the outer side when in use) of the retention bar are parallel to each other, the upper chamfer of the retention bar is provided, the rectangular structure has good stability, the chamfer is provided, and the cheek and tongue sides are parallel to each other, so that the use is more comfortable, and adverse stress is avoided to the implant and the retention bar 1 connected to the implant when replacing the denture, thereby avoiding influence on the stability of the implant in the mouth.

As a preferred embodiment of the present example, it should be further described that the retention bar 1 is a pure titanium retention bar, which has good stability and is clean and sanitary.

Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of manufacturing a implant covered denture retention apparatus, the method comprising:

according to the scanning structure, the PEEK retention card is manufactured by utilizing CAD/CAM, when the PEEK retention card sleeve is connected to the outside of the retention bar, the maximum static friction force corresponding to a plurality of groups of bar card standard components with different gaps is measured through a pulling machine at a displacement speed of 100mm/min, and when the bar card gap is 0.01mm, the optimal retention force is 30N.

2. The method of claim 1, wherein the cross section of the retaining bar is rectangular, the two sides of the cheek tongue of the retaining bar are parallel, and the upper end of the retaining bar is chamfered.

3. The method of claim 1 or 2, wherein the retention bar is a pure titanium retention bar.