ĐÁNH GIÁ ẢNH HƯỞNG CỦA TƯ THẾ CƠ THỂ ĐỐI VỚI SỰ THAY ĐỔI KHỚP CẮN Ở MỘT NHÓM NGƯỜI BỆNH CÓ MÒN NHIỀU RĂNG

Abstract

The study aimed to evaluate the influence of body posture on occlusal changes in a group of patients with tooth wear using the T-Scan system. The case series descriptive study was conducted on 20 patients with tooth wear treated at the School of Dentistry – Hanoi Medical University, from June 2024 to June 2025. Occlusion time (OT), Anteroposterior occlusal force distribution(AOD_CO), and Lateral occlusal force distribution (LOD_CO) were measured in four different postures: supine (SP), upright head position (UHP), forward head posture (FHP), and head extended posture (HE).  The results showed that OT in the forward head posture and upright head posture was longer than in the supine posture (p=0.015). AOD_CO also changed significantly across positions (p = 0.003) and showed a tendency for occlusal force to shift forward in the forward head posture and backward in the head extension, with the comparisons UHP–SP (p = 0.012) and FHP–UHP (p = 0.014). In contrast, LOD_CO indicated that the lateral force distribution at maximum intercuspation was relatively stable (p = 0.36). Conclusion: Changes in body posture affect the stability and anteroposterior balance of occlusal force distribution.