高角和低角病例的诊断、临床特征及正畸治疗特点(12)

clinical features of high-angle and low angle casesTeeth: 低角病例上牙弓较宽阔, 切牙位置较直立故前牙拥挤多见, 前牙覆较深甚至呈闭锁, 后牙的临床冠较短, Spee 曲线深、 曲度较大, 息止间隙较大。伴有吐舌习惯的高度病例根尖片 常可见恒中切牙牙根明显变短。 Low angle cases:- broad upper arch with shallow hard palate, the incisor position is more upright so anterior teeth crowding is common.clinical crown is smaller. Curve of spee is deep.angle between long axis of upper and lower incisor is high12

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