评估T-ScanⅢ系统在固定义齿咬合重建修复效果评价中的临床应用价值。

回顾性分析2022年1月至2023年12月期间22例在上海交通大学医学院附属第九人民医院口腔修复科经临床确诊并完成固定义齿咬合重建患者的T-ScanⅢ动态咬合数据。检测时间点包括咬合重建前（T0）、修复体戴入即刻（T1）和修复后1年（T2）。分析参数包括咬合力不对称指数（AOF）、咬合力中心点（COF）位置、咬合接触时间（OT）、咬合分离时间（DT）和左右侧咬合力分布百分比等，采用SPSS 18.0软件对数据进行统计学分析，使用t检验或McNemar检验（配对χ²检验）比较治疗前后的差别。

固定义齿咬合重建患者AOF从T0期（32 ± 10）%显著降至T2期（10 ± 6）%，差异有统计学意义（t = -5.820，P<0.001），咬合力分布均衡性显著改善。COF位于功能中心区外的比例从T0期77.3%（17/22）降至T1/T2期13.6%（3/22），差异有统计学意义（χ²=12.071，P<0.001），距中线距离从T0期（9.80 ± 3.89）mm缩短至T2期（3.60 ± 2.04）mm，差异有统计学意义（t = -5.391，P<0.001）。OT从T0期（0.97 ± 0.14）s缩短至T2期（0.33 ± 0.10）s，差异有统计学意义（t = -6.343，P<0.001）；前伸运动DT从T0期（0.81 ± 0.11）s降低至T2期（0.19 ± 0.05）s，差异有统计学意义（t = -6.445，P<0.001）。侧方运动DT均呈现同步改善（t_左侧=-6.340，P_左侧<0.001；t_右侧=-6.395，P_右侧<0.001）。

T-ScanⅢ可用于定量分析咬合重建效果，为临床评估和调整治疗方案提供可靠依据。

To evaluate the clinical application value of T-Scan Ⅲ system in the evaluation of occlusal reconstruction and restoration effect of fixed dentures.

A retrospective analysis was conducted on the T-Scan Ⅲ dynamic bite data of 22 patients who were clinically diagnosed and completed fixed denture bite reconstruction in the Department of Prosthodontics, the Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University from January 2022 to December 2023. The detection time points included: Before bite reconstruction (T0), immediately after restoration (T1), and 1 year after restoration (T2). The analysis parameters included: Asymmetry index of the occlusal force (AOF), Central occlusal force (COF) position, Occlusion Time (OT) and Disocclusion Time (DT), percentage of left and right occlusion force distribution, etc. SPSS 18.0 software was used for statistical analysis of the data, and t-test or McNemar-test was used to compare the differences before and after treatment.

The AOF of patients undergoing fixed denture occlusal reconstruction decreased significantly from T0 stage (32 ± 10) % to T2 stage (10 ± 6) % (t = -5.820, P<0.001), and the balance of bite force distribution was significantly improved. The proportion of COF located outside the functional center decreased from 77.3% (17/22) in T0 phase to 13.6% (3/22) in T1/T2 phase (χ²=12.071, P<0.001), and the distance from the midline shortened from (9.80 ± 3.89) mm to (3.60 ± 2.04) mm (t = -5.391, P<0.001). OT shortened from (0.97 ± 0.14) s to (0.33 ± 0.10) s (t = -6.343, P<0.001) ; The DT of protrusive movement decreased from (0.81 ± 0.11) s to (0.19 ± 0.05) s (t = -6.445, P<0.001). The excursive movement DT showed synchronous improvement (t_{left side}=-6.340, P_{left side}<0.001; t_{right side}=-6.395, P_{right side}<0.001) .

T-Scan Ⅲ can be used for quantitative analysis of bite reconstruction effects, providing reliable basis for clinical evaluation and adjustment of treatment plans.