高角和低角病例的诊断、临床特征及正畸治疗特点(11)

二、高角病例和低角病例的临床特征The case of high-angle and low angle of the clinical features 2、牙Tooth : 高角病例常见上牙弓狭窄、腭盖高拱, 由于切牙多唇向倾斜前牙拥挤较少见, 前牙 覆浅甚至呈现开或开倾向, 后牙的临床冠高 度较大, 曲线平坦甚或反向, 上下颌之间的 息止间隙较小;High angle cases:- narrow upper arch with deeper hard palate, anterior proclination is rarely seen. the height of clinical crown larger, the curve of spee is flat and the angle between the facial axis of upper and lower incisor is less.11