Clinical reproducibility of different centric relation recording techniques in edentulous individuals: An observational cross‐sectional study

Purpose To assess the reproducibility of four different centric relation (CR) recording techniques, and time spent performing each technique in edentulous individuals. Materials and methods Four techniques were assessed: extraoral gothic arch (EOGA) tracing, intraoral gothic arch (IOGA) tracing, deglutition (D), and frontal manipulation with tongue elevation (FMTE). Twelve subjects participated in the study; four technique records were performed on each volunteer by the same operator. Each record was repeated three times, in the same period of the day, with a 30 min interval between each technique. The reproducibility of each technique was assessed by the tri‐dimensional displacement of the position of the condylar housing (mandible condyle) to the wall of the condylar guide (glenoid cavity) in the semi‐adjustable articulator (anteroposterior, mediolateral, and superior–inferior). The time spent on each technique was timed in seconds (from the beginning of each technique until the wax occlusion fixation). The analysis of variance (ANOVA) and the Tukey test were performed for anteroposterior displacement (two‐way) and for time spent on CT recording techniques (one‐way) (α