Method for speculating midpoint of lower edge of rear upper lip of denture suitable for edentulous jaw

Abstract

The invention relates to a method for speculating the midpoint of the lower edge of the rear upper lip of a denture suitable for an edentulous jaw, which comprises the following steps of 1) scanning the alveolar ridge of the edentulous jaw of the upper jaw and the lower jaw to obtain the data D1; 2) scanning to obtain the data D2 of the front face of the patient with the edentulous jaw, and measuring a nasolabial angle A; 3) measuring the length D from the vestibular groove bottom to the lower edge of the upper lip when the patient wears the tooth; 4) establishing a median sagittal plane S inthe data D1, and establishing a straight line L1 between the most salient point of the lip surface of the maxillary alveolar ridge and the vestibular groove bottom point P1; (5) rotating the L1 towards the lip side by (1.29 A-113. 35) degrees with the vestibular groove bottom point as the rotation center, and obtaining a straight line L2; and 6) creating a point P2 on the straight line L2, whereinthe straight line distance between the point P2 and the vestibular groove bottom point P1 is the length D, and obtaining the midpoint of the lower edge of the upper lip after the proper denture is worn. The method can accurately predict the midpoint of the lower edge of the upper lip after the proper complete denture is worn, and further improves the efficiency and precision of the three-dimensional design of the edentulous complete denture.

Description

technical field [0001] The invention relates to a digital design method for an edentulous complete denture, in particular to a method for estimating the middle point of the lower edge of the upper lip after the edentulous jaw is fitted with a suitable denture. Background technique [0002] In the traditional manual technology and the currently known digital design technology process, the proper fullness of the edentulous jaw and the position of the midpoint of the lower edge of the upper lip after wearing a suitable denture all require a physical occlusal tray for diagnosis and prediction, which is complicated and difficult to operate. Experience skills are too dependent. Time-consuming, labor-intensive, and individual differences are great, which affects the aesthetic effect of the final restoration of the edentulous complete denture. Contents of the invention [0003] The purpose of the present invention is to provide a method for estimating the middle point of the lowe...

AI Technical Summary

Problems solved by technology

[0002] In the traditional manual technology and the currently known digital design technology process, the proper fullness of the edentulous jaw and the position of the midpoint of the lower edge of the upper lip after wearing a suitable denture require a solid occlusal tray for diagnosis and prediction, which is complicated and difficult to operate. Too much dependence on experience and skills

Time-consuming, labor-intensive, and individual differences are great, which affects the aesthetic effect of the final restoration of the edentulous complete denture