Abstract: Objective　To investigate the application effect of electronic facebow and digital caliper in measurement of mandibular movement. Methods　Sixteen patients with temporomandibular disorders (TMD) from October 2020 to February 2022 were selected as the research group. Sixteen healthy subjects were selected as the control group. After admission, both groups underwent digital caliper examination and electronic facebow examination respectively. The maximum opening, protrusive boarder movements, lateral left boarder movements and lateral right boarder movements were compared between the two groups, and the measurement accuracy of different examinations were compared. Results　There was no significant difference in the maximum opening measured by electronic facebow and digital caliper between the research group and control group (P>0.05). The movement distance of protrusion, left laterality and right laterality were measured by electronic facebow and digital caliper. The distance of the study group was higher than that of the control group, and the difference was statistically significant (P<0.05). There was no significant difference in the maximum opening, protrusive boarder movements, lateral left boarder movements and lateral right boarder movements distance of TMD patients measured by electronic facebow and digital caliper (P>0.05). The data of the maximum opening, protrusive boarder movements, lateral left boarder movements and lateral right boarder movements were measured by electronic facebow and digital caliper respectively, and there was no significant difference (P>0.05). Conclusion　TMD patients are often accompanied by TMD movement abnormalities, and both electronic facebow and digital caliper can accurately measure mandibular movement. The former one is more convenient to use and has more comprehensive functions, which can provide a more reliable reference basis for clinical diagnosis and treatment.

Key words: Electronic facebow, 　Digital caliper, 　Mandibular movement, 　Measurement accuracy, 　Temporomandibular disorders