Dental crown width measuring method of three-dimensional dental grid model and related device

The invention discloses a dental crown width measurement method of a three-dimensional dental grid model and a related device, and the method comprises the steps: firstly obtaining the three-dimensional dental grid model, and carrying out the original projection and normal vector projection of a central point of a triangular grid contained in each dental crown in an occlusal surface direction; after the two-dimensional projection is obtained, using a principal component analysis dimension reduction method based on a dynamic calibration point to obtain a scale line capable of representing the width measurement direction of each dental crown; calculating an intersection point set of the scale line of each dental crown and the two-dimensional projection area of the dental crown in a scanning manner; and calculating the distance of each pair of intersection points of each dental crown to obtain an intersection point distance set, and selecting the maximum point distance from the intersection point distance set as