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目的探讨恒牙初期安氏Ⅲ类错侧貌面型特征,分析侧貌面型与硬组织的相关关系。方法选择侧貌美观正常和安氏Ⅲ类错的恒牙初期青少年各50例,进行15项面相测量指标和9项硬组织头影测量指标的测量分析。结果除4项面相测量值和1项硬组织测量值外,其余测量值差异均有统计学意义(P<0.01)。多因素判别分析筛选出的5项面相测量指标与硬组织头影测量指标有显著相关性(P<0.05)。结论Ⅲ类恒牙初期青少年错患者侧貌明显异常,最敏感最能体现其侧貌异常的有5项面相测量指标。正畸治疗中可通过有针对性的纠正硬组织异常来改善侧貌面型。
Objective To investigate the profile features of Angle Ⅲ malocclusion in the early stage of permanent teeth and to analyze the relationship between the profile and hard tissue. Methods Fifty cases of primary adolescents with normal facial appearance and Class Ⅲ malocclusion were selected and 15 measurements of facial physiology and 9 measurements of cephalometric indices were performed. Results There were significant differences among the four measurements (P <0.01) except for 4 measurements of face and 1 hard tissue. The multivariate discriminant analysis screened 5 face measurements and hard tissue cephalometric measurements were significantly correlated (P <0.05). CONCLUSIONS: The abnormal appearances of misdiagnosed adolescents in the early stage of permanent dentition in type Ⅲ are characterized by five facets, the most sensitive and the most sensitive. Orthodontic treatment can be targeted through the correct abnormalities of hard tissue to improve the side appearance.