论文部分内容阅读
①目的 比较替牙期骨性AngleⅢ类错雅合和正常雅合的颅颌硬组织构形差异 ,分析替牙期骨性AngleⅢ类错雅合的颅颌形态 ,并探讨错雅合发生机制和颅颌发育趋势。②方法 选择替牙期骨性Ⅲ类错雅合者 38例为研究对象 ,另选相应年龄的替牙期正常雅合4 0例作为对照组。拍摄正中雅合位X线头颅定位侧位片。③结果 硬组织线距测量值男性 11项、女性 10项两组比较有显著性差异 (t=2 .0 83～ 2 .5 6 9,P <0 .0 5 ;t=2 .82 7～ 3.4 76 ,P <0 .0 1)。两组硬组织角度测量值比较 17项有显著差异 (t=2 .2 4 5～ 2 .6 72 ,P <0 .0 5 ;t=2 .937～ 3.4 2 9,P <0 .0 1)。两组间线距比例值比较 5项有显著差异 (t=2 .189～ 3.5 2 8,P <0 .0 5、0 .0 1)。④结论 下颌发育过度是形成骨性AngleⅢ类错雅合的主要原因 ;颅颌三维空间比例的失调 ,将导致骨性错雅合的发生。
①Objective To compare the craniofacial and mandibular histopathological differences between skeletal Angle Ⅲ skeletal Class Ⅱ malocclusion and normal hermaphroditism and to analyze the craniofacial morphology of skeletal Class Ⅲ malocclusion during dentition. Cranial jaw development trend. ② Methods 38 cases of stage Ⅲ skeletal Class Ⅲ malocclusion were selected as the study objects, and 40 cases of normal age matched for normal dentition were selected as the control group. The center of the film is located in the joint X-ray location of the skull. Results There were significant differences in the measurement of hard tissue pitch between male and female (10 items, t = 2.083 ~ 2.559, P <0.05; t = 2.82 ~ 3.4 76, P <0. 01). There were significant differences between the two groups in 17 measurements (t = 2.24-2.672, P <0.05; t = 2.937-4.429, P <0.01 ). There were significant differences (P <0.05, P <0.05, P <0.05) between the two groups. Conclusion The over-development of the mandible is the main reason for the formation of skeletal Class III malocclusion. The imbalance of the cranial jaw in the three-dimensional space will lead to the occurrence of the skeletal malposition.