Abstract: Jaw movement recording is an important clinical technique that can help physicians understand the process and principles of jaw movement, diagnose diseases and evaluate the effectiveness of interventions. Zebris Jaw Movement Analysis System（JMA）, as a mandibular motion recording system that has been gradually popularized in recent years, has its special advantages. This article introduces the working principle and method of Zebris Jaw Movement Analysis System (JMA)and summarizes its application.

Key words: mandibular movement, electronic facial arch, Zebris Jaw Movement Analysis System(JMA)