The invention relates to a three-dimensional tooth model local coordinate
system prediction method. The method comprises the following steps: S1, acquiring a three-dimensional digital model of a
single tooth; s2, sampling a single three-dimensional tooth to obtain a three-dimensional
point set of the tooth model; s3, predicting a three-dimensional vertex by using the trained
deep learning model; s4, fitting a linear vector and generating a local coordinate
system vector; s5, carrying out vector cross multiplication operation on the x vector and the z vector so as to construct a y vector of the tooth local coordinate
system; and S6, carrying out cross multiplication on the y vector and the z vector to obtain a new x vector, and completing the construction of the tooth local coordinate system. According to the method, the local coordinate system of the teeth can be automatically and accurately generated, the digital
processing precision in the fields of tooth restoration, orthodontic treatment and the like is improved, meanwhile, the time for making and implementing a
treatment plan is shortened, and the working efficiency is improved. Manual rule setting is not needed, the limitation of a traditional
algorithm is avoided, and the
processing capacity of a complex tooth model is improved.