A new topological structure is given based on STL format and the vertex-based entity offset algorithm is presented to realize the rapid generation of roughing/finishing tool path for molar prosthesis.

• 本文给出了基于STL格式新的拓扑结构，提出了基于顶点的实体等距算法，实现了磨牙修复体粗／精加工刀轨的快速生成。