Comparative evaluation of the volume of occlusal adjustment of repositioning occlusal devices designed by using an average value digital articulator and the jaw movement analyzer

Tiwu Peng; Zhikang Yang; Teng Ma; Mindi Zhang; Guanghui Ren

doi:10.1016/j.prosdent.2023.06.018

Comparative evaluation of the volume of occlusal adjustment of repositioning occlusal devices designed by using an average value digital articulator and the jaw movement analyzer

J Prosthet Dent. 2023 Aug 1:S0022-3913(23)00419-5. doi: 10.1016/j.prosdent.2023.06.018. Online ahead of print.

Authors

Tiwu Peng¹, Zhikang Yang¹, Teng Ma¹, Mindi Zhang¹, Guanghui Ren²

Affiliations

¹ Graduate student, Dental Technology, School of Stomatology, Binzhou Medical University, Yantai, Shandong, PR China.
² Associate Professor, Center for Occlusion, Yantai Stomatological Hospital of Binzhou Medical University, Yantai, Shandong, PR China. Electronic address: rgh@bzmc.edu.cn.

PMID: 37537106
DOI: 10.1016/j.prosdent.2023.06.018

Abstract

Statement of problem: The volume of occlusal adjustment of digital occlusal devices designed with different digital occlusal articulators is unknown.

Purpose: The purpose of this clinical study was to evaluate and compare the clinical efficacy and volume of occlusal adjustment of digital occlusal devices designed by using an average value digital articulator and the jaw movement analyzer (JMA).

Material and methods: Thirty participants were randomly divided into 2 groups, an Average value group and a JMA group, with 15 participants in each group. The centric relation position of the participants was determined by an experienced investigator with the aid of a leaf gauge. An intraoral scanner (TRIOS 3) was used to obtain digital scans of the maxillary and mandibular dentition and the maxillomandibular relationship record in the centric relation position. Personalized articulator parameters of participants in the JMA group were obtained by using a JMA (JMAnalyser). Different articulator parameters were used to fabricate an occlusal device in a denture design software program (exocad DentalCAD). The surface of the occlusal device was coated with a dental optical spray and then scanned by using a laboratory scanner (Kavo LS3). The process was repeated after the occlusal device was adjusted. The files of the 2 scans were imported into a reverse engineering software program, and the root mean square (RMS) values were obtained by best-fit alignment and 3-dimensional comparison. The Shapiro-Wilk normality test and homogeneity of variance test were performed, and t tests were used to evaluate differences in the RMS values between the groups (α=.05).

Results: The experimental data were generally normally distributed (P>.05). No statistically significant difference was found between the RMS values of the Average and the JMA groups (P>.05).

Conclusions: No significant difference in the volume of occlusal adjustment was found when using occlusal devices made by using the digital average articulator or the JMA, suggesting that either method can be used to program articulators for the fabrication of occlusal devices.