Abstract: Objective To analyze the differences in the marks of soft and hard facial tissues in patients with the jaw relationships of Class Ⅰ,Ⅱ,Ⅲ, and provide references for occlusal reconstruction or restoration treatment of edentulous patients. Methods A total of 329 cases were collected from January 2019 to September 2020 who went to the Affiliated Stomatological Hospital of Tongji University to take lateral cephalometric radiograph. According to ANB, they were divided into Class Ⅰ patients (2°~5°), Class Ⅱ patients (＞5°), and Class Ⅲ patients (＜2°). According to the mandibular plane angle (FHMP), they were divided into hyperdivergent patients (>32°), normal patients (22°~32°), and hypodivergent patients (＜22°). Cephalometric analysis was performed to measure and analyze the height, angle and proportion of soft and hard tissues. Results ① In the total population, 22 measured values of ClassⅠ, Ⅱ and Ⅲ patients showed statistical differences (P<0.05). The ANSMe was the largest in Class Ⅲ patients, followed by Class I patients, and Class Ⅱ patients were the smallest. ② In the hyperdivergent patients, normal patients and the hypodivergent patients, there were still 11 measured values showing statistical differences in Class Ⅰ, Ⅱ and Ⅲ patients (P<0.05). ③Correlation analysis showed that ANSMe was correlated with other facial measurements, and the correlation coefficient of ArGn was 0.839 in Class Ⅰ patients, 0.732 in Class Ⅱ patients, and 0.806 in Class Ⅲ patients, all of which had a high correlation. Conclusion There are differences in the facial measurements of people with the jaw relationships of Class Ⅰ,Ⅱ,Ⅲ,so relationship should be considered during restoration treatment

Key words: jaw relationship, cephalometry, facial mark point, vertical dimension