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目的:分析伴有颞下颌关节紊乱病(TMD)的安氏Ⅱ类错患者在CO-CR位的髁突位置变化。方法:利用髁突移位测量仪(MCD)记录15例伴有TMD的安氏Ⅱ类错患者CO-CR位的髁突位置。结果:15例患者髁突CO-CR位矢状向偏移量均值左侧为0.99 mm;右侧1.22 mm,左右髁突矢状向偏移量均有统计学意义;矢状向上70.0%(21/30)CR位髁突位于CO位的后方,其中左侧比率为66.7%(10/15)。垂直向偏移量均值左侧为1.09 mm,右侧1.37 mm,左右髁突垂直向偏移量均有统计学意义;垂直向63.3%(19/30)CR位髁突位于CO位的上方,其中左侧比率为60.0%(9/15)。髁突垂直向偏移量均值(1.23 mm)>髁突矢状向偏移量均值(1.10 mm),但差异无统计学意义。髁突横向偏移量均值为0.54 mm,髁突在横向偏移量有统计学意义;53.3%(8/15)CR位髁突位于CO位的右方。结论:伴有TMD的安氏Ⅱ类错患者存在着CO-CR位髁突位置不一致,正畸治疗前应充分考虑患者的髁突位置以便制定科学的治疗方案。
PURPOSE: To analyze the changes of condylar position at CO-CR in patients with Class Ⅱ division malocclusion complicated with temporomandibular disorder (TMD). Methods: Condylar displacement meter (MCD) was used to record the condylar position of CO-CR in 15 patients with TMD with Class Ⅱ malocclusion. Results: The sagittal shift of the left and right condyles of the 15 patients was 0.99 mm on the left side and 1.22 mm on the right side. The sagittal upward sagittal dimension was 70.0% 21/30) CR The condyle was located posterior to the CO, with a left-sided ratio of 66.7% (10/15). The vertical deviation of the mean vertical displacement was 1.09 mm on the left and 1.37 mm on the right, with the vertical displacement of the left and right condyles statistically significant. The 63.3% (19/30) vertical condylar position was above the CO position, The left ratio is 60.0% (9/15). The average vertical condyle shift (1.23 mm)> the average sagittal shift (1.10 mm), but the difference was not statistically significant. The average lateral condyle lateral displacement was 0.54 mm, and the lateral condyle shift was statistically significant. The condyles of 53.3% (8/15) CR were located to the right of the CO position. CONCLUSION: There is inconsistency in the location of CO-CR condyles in patients with Class II malocclusion associated with TMD. Before orthodontic treatment, the position of condyles should be fully considered in order to make a scientific treatment plan.