SỬ DỤNG MÁY QUÉT TRONG MIỆNG ĐÁNH GIÁ THAY ĐỔI KHỚP CẮN TRƯỚC VÀ SAU ĐIỀU TRỊ ĐAU CƠ RỐI LOẠN THÁI DƯƠNG HÀM

Abstract

Objective: To evaluate changes in pain intensity and occlusal contacts at the maximum intercuspal position (MIP) before and after treatment of primary myofascial pain in temporomandibular disorders (TMD) using an intraoral scanner.

Subjects and methods: A longitudinal observational study was conducted on 24 TMD patients with myofascial pain diagnosed according to the International Classification of Orofacial Pain 2020, indicated for stabilization splint therapy. Pain intensity (VAS) and occlusal parameters were evaluated using an intraoral scanner before and after treatment.

Results: Mean pain intensity (VAS) significantly decreased from 5.79 ± 1.74 to 1.67 ± 1.31 (p=0.000). The mean number of teeth with contacts at MIP significantly decreased from 15.83 ± 4.68 to 12.33 ± 3.73 (p=0.005). Occlusal contacts significantly reduced on the non-painful side (p=0.009) and in the premolar region (p=0.010); the proportion of patients with lateral occlusal interference tended to decrease from 70.83% to 58.33% but did not reach statistical significance (p=0.083); guidance patterns (87.5% group function, 12.5% canine guidance) remained unchanged post-treatment (p=1.000).

Conclusion: Treatment of myofascial TMD pain with a stabilization splint significantly reduces pain intensity and the total number of teeth with occlusal contacts at MIP. Guidance patterns do not change after treatment. The intraoral scanner is an effective and objective tool for quantitative occlusal evaluation.