Design and manufacturing method for dentition undercut solid retention tooth preparation guide plate

Abstract

The invention relates to a design and manufacturing method for a dentition undercut solid retention tooth preparation guide plate. The method comprises the following steps of (1) performing three-dimensional scanning on teeth and adjacent teeth which require tooth preparation; (2) designing a three-dimensional shape of each of tooth preparation bodies by using three-dimensional reverse engineeringsoftware; (3) according to the three-dimensional shape of each of the tooth preparation bodies in the step (2), designing guide grooves, capable of guiding a motion path of the dental bur all the way, on the guide plate; (4) making the complete surface of the marginal gingival and the dental crown of each adjacent tooth forward biased for 1 mm, including undercut areas serving as guide plate retention parts; (5) fusing the guide grooves and the retention parts into guide plate integral data; and (6) dividing the guide plate into a lip-cheek part and a tongue-palate part from the lip-cheek lateral boundary of an occlusal surface; and designing 3-4 implant retention structures between the two parts, and processing the 3-4 implant retention structures into entities by using a three-dimensional printer. The method can significantly improve the retention strength of an existing tooth preparation guide plate in actual application, lowers the difficulty of emplacement and reduces the size ofthe guide plate, thus being beneficial to popularization and application.

Description

technical field [0001] The invention relates to a tooth preparation guide plate, in particular to a method for designing and manufacturing a tooth preparation guide plate with an undercut and strong retention of the dentition. Background technique [0002] In order to make clinical tooth preparation more perfect, dentists began to seek auxiliary equipment to increase the accuracy and rationality of tooth preparation. The main method was to make tooth preparation guides. Tooth preparation guide is one of the important ways to obtain the ideal tooth preparation and avoid excessive grinding of healthy tooth tissue or difficulty in positioning the restoration due to insufficient preparation. However, from the acquisition of three-dimensional data, to the design of the guide plate, to the manufacture of the guide plate and clinical application, errors will inevitably be introduced in the middle process. The stability of the guide plate when it is finally used for tooth preparati...

AI Technical Summary

Problems solved by technology

If the error is too large, the postoperative result is completely inconsistent with the design plan, which will increase the risk of clinical treatment

Especially when the retaining strength of the guide plate canno...

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