Date: February 2023.
Source: Journal of Advanced Prosthodontics;15(1):11-21. English. (ON-LINE)
Purpose: To compare the sagittal condylar inclination (SCI) in dentate individuals measured by the different methods with mechanical articulator (MA), virtual articulator (VA), and a jaw tracking device (JTD) system.
Materials and Methods: A total of 22 healthy dentate participants were enrolled in this study. For MA workflow, the SCI was obtained by a semi-adjustable articulator with protrusive interocclusal records. The SCI was also set on a VA by aligning intraoral scan (IOS) with cone beam computed tomography (CBCT) and facial scan (FS), respectively. These virtual workflows were conducted in a dental design software, namely VAIOS-CBCT and VAIOS-FS. Meanwhile, a JTD system was also utilized to perform the measurement. Intraclass correlation was used to assess the repeatability within workflows. The bilateral SCI values were compared by Wilcoxon matched-pairs signed rank test for each workflow, and Kruskal-Wallis test and post hoc p-value Bonferroni correction were used to compare the differences among four workflows. The agreement of VAIOS-CBCT, VAIOS-FS, and JTD compared with MA was evaluated by Bland-Altman analysis.
Results: Intraclass correlation of the SCI revealed a high degree of repeatability for each workflow. There were no significant differences between the left and right sides (P > .05), except for VAIOS-CBCT (P = .028). Significant differences were not found between MA and VAIOS-FS (P > .05). Bland-Altman plots indicated VAIOS-CBCT, VAIOS-FS, and JTD were considered to substitute MA with high 95% limits of agreement.
Conclusions: The workflow of VAIOS-FS provided an alternative approach to measure the SCI compared with MA.

Article: A comparative study to measure the sagittal condylar inclination using mechanical articulator, virtual articulator and jaw tracking device.
Authors: Liya Ma, Fei Liu, Jiansong Mei, Jiarui Chao, Zhenyu Wang, Jiefei Shen. West China Hospital of Stomatology, Sichuan University No. 14, Chengdu, Sichuan, China.