Preparation guide plate and removable partial denture support modelconstruction method and manufacturing method

Abstract

The invention discloses a preparation guide plate and removable partial denture support model construction method and manufacturing method, and the method comprises the steps: carrying out implant simulation implantation in oral cavity CBCT data, and determining an implant implantation site and an implant implantation direction; generating a simulated implant in the oral scanning data and marking the direction of a removable partial denture in-position path, wherein the direction of the in-position path is consistent with the implanting direction of the implant; marking an inner guide plane of the adjacent tooth in the direction of the reference in-position path of the inner side of the adjacent tooth of the oral scanning data; and generating a preparation guide plate model according to an edentulous area, adjacent teeth, guide planes on the inner sides of the adjacent teeth and an area to be ground in the oral scanning data; further generating a removable partial denture support model according to the oral scanning data; and preparing a preparation guide plate and a support by adopting a 3D printing method based on the generated model. According to the invention, the problems in the prior art that the direction of the in-position path of the removable partial denture is inconsistent with the implanting direction of the implant, the long-term retention effect of the denture is influenced, and the bone resorption of the implant is easily caused are solved.

Description

technical field [0001] The invention belongs to the technical field of oral cavity digitization, and in particular relates to a method for constructing a preparatory guide plate and a removable partial denture bracket model and a guide plate for making a method. Background technique [0002] In the field of stomatology, dentition defect is one of the most common oral diseases. Restoration is usually done with a fixed bridge, removable partial dentures, or implants. Fixed bridge dentures are less accepted by patients due to the large amount of healthy tooth tissue that needs to be removed. Removable partial dentures are widely used because of their low cost, minimally invasive, and wide indications. However, due to its structural characteristics, it is necessary to design clasps and rests on the remaining teeth to improve the overall retention and stabilization effect. Therefore, the remaining teeth are susceptible to greater stress during use, which affects their health. ...

AI Technical Summary

Problems solved by technology

[0005] However, in actual use, it is also found that when making frame-type removable partial dentures, the guide plane should be prepared on the remaining natural teeth; due to the lack of actual reference, doctors can only complete the guide plane with two-dimensional images or general impressions. Grinding or placement of implants, resulting in a discrepancy between the orientation of the framed RPD and the orientation of the implant placement

After the removable denture is used for a period of time, the parts connecting the base tissue surface and the implant abutment are severely worn, which seriously affects the retention effect of the removable partial denture. Because the removal direction of the denture (in-position direction) is inconsistent with the implant placement direction, the implant is subject to a large lateral force, resulting in bone resorption around the implant.

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