Outcomes of Bilateral Temporomandibular Joint Arthroscopy: an International Multicentric Prospective Study Including 524 Joints

PURPOSE:This study aimed to evaluate the efficacy of bilateral TMJ arthroscopy in patients with different Wilkes stages, comparing the results obtained in different arthroscopic levels on a larger scale, unifying similar populations. METHODS:A multicentric prospective clinical study was conducted in three TMJ departments performing temporomandibular joint surgery in Portugal and Brazil, with an enrolling window active from January 1, 2019, to December 1, 2022. The primary clinical outcome was TMJ pain evaluated through a visual analogue scale. The secondary clinical outcome was the maximum mouth opening (MMO). TMJ arthroscopy was performed with a 1.9-mm arthroscope, including a video system with a 2.8-mm outer protective cannula. RESULTS:262 patients, representing a total of 524 operated joints were enrolled. The mean age was 35.3 years. A significant decrease postoperatively in VAS pain was observed for all Wilkes stages. The lowest value of VAS pain was observed in Wilkes II compared to Wilkes III and IV. In the secondary outcome, MMO was observed to have a significant improvement in all Wilkes stages. CONCLUSION:In this multicentric study, bilateral TMJ arthroscopy was shown to be an effective procedure to reduce pain and increase maximum mouth opening in patients with different Wilkes stages, representing a valid minimally invasive solution.