Construction method and production method of preparatory guide plate and removable partial denture bracket model

Abstract

The invention discloses a construction method and a manufacturing method of a preparatory guide plate and a removable partial denture bracket model. The method includes performing implant simulation implantation in oral cavity CBCT data, and determining the implant implantation site and the implant implantation direction; Generate simulated implants in the oral scan data and mark the direction of the removable partial denture insertion path, which is consistent with the direction of implant placement; mark the inner side of the adjacent teeth with reference to the insertion path direction on the inner side of the adjacent teeth in the oral scan data Guide plane: generate a preparatory guide plate model based on the tooth-missing area, adjacent teeth, guide plane inside the adjacent teeth and the area to be removed in the oral scan data. A removable partial denture frame model is further generated based on the oral scan data. Based on the generated model, the preparation guide and bracket were prepared by 3D printing method. The invention solves the problems in the prior art that the in-place direction of the removable partial denture is not consistent with the implant implantation direction, which affects the long-term retention effect of the denture and easily causes the bone absorption of the implant.

Description

technical field [0001] The invention belongs to the technical field of oral cavity digitization, and in particular relates to a guide plate for a preparation guide plate and a removable partial denture bracket model construction method and manufacturing method. Background technique [0002] In the field of oral medicine, dentition defect is one of the most common oral diseases. Restorations are usually performed with fixed bridges, removable partial dentures, or implant dentures. Fixed bridge dentures have low patient acceptance due to the need to remove a large amount of healthy tooth tissue. Removable partial dentures are widely used due to their low cost, minimal invasiveness, and wide indications. However, due to its structural characteristics, it is necessary to design snap rings, supports, etc. 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 t...

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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