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目的:定量评价半固定式Twin-block功能性矫治器在Ⅱ类错畸形正畸治疗中对颞下颌关节改建的影响。方法:选择22例应用半固定式Twin-block矫治器进行治疗的安氏Ⅱ类1分类错畸形患者,采用SPSS13.0软件包分别对矫形治疗前、后X线头颅侧位片上的数据进行配对t检验,以评价其疗效。结果:矫形治疗后,髁突明显向上(2.7mm)和向后(3.6mm)生长(P<0.01),关节窝明显向下(1.5mm,P<0.01)和向后(0.8mm,P<0.05)移位,有效颞下颌改变与髁突生长相似,明显向上(4.2mm)和向后(2.7mm)方向改建(P<0.01),下颌骨轻度顺时针旋转(P>0.05)。结论:半固定式Twin-block矫治器能有效增加患者的依从性,促进颞下颌关节的生长改建,有利于改善上下颌骨矢状关系的不调。
Objective: To quantitatively evaluate the effect of semi-fixed Twin-block functional appliance on the reconstruction of temporomandibular joint during the treatment of class Ⅱ malocclusion and orthodontic treatment. Methods: Twenty-two patients with Class Ⅱ division 1 malocclusion who were treated with semi-fixed Twin-block appliance were selected, and SPSS13.0 software package was used to analyze the data of the X-ray cephalogram before and after orthopedic treatment Paired t test to evaluate its efficacy. RESULTS: After orthopedic treatment, the condyle was significantly upward (2.7mm) and backward (3.6mm) (P <0.01), and the joint was significantly downward (1.5mm, P <0.01) 0.05). The effective temporomandibular changes were similar to those of condyle growth. They were obviously reconstructed upward (4.2mm) and backward (2.7mm) (P <0.01), and the mandible rotated clockwise (P> 0.05). Conclusion: The semi-fixed Twin-block appliance can effectively increase patient compliance and promote the growth and remodeling of the temporomandibular joint, which is beneficial to improve the sagittal relationship of the upper and lower jaws.