病例五 :黄× ,男 ,12岁。恒牙初期。左右第一磨牙为中性关系。前牙呈严重创伤和深覆。上下切牙严重舌倾 ,下切牙根面唇向暴露近三分之二。上牙列无明显拥挤 ,下牙列拥挤Ⅱ° ,上下中线正。面下三分之一明显短缩 ,颏唇沟明显。张口受限 ,考虑与前牙闭锁型深覆有关。 Case five: yellow ×, male, 12 years old. Permanent teeth  early. The first molars around the neutral  relationship. The anterior teeth were severely trauma 深 and deep  . Upper and lower incisors severe tongue tilt, lower incisors face lip exposure to nearly two-thirds. No obvious crowding on the dentition, the lower teeth crowded Ⅱ °, up and down the median line. One-third of the surface was significantly shortened, chi lips groove obvious. Open mouth is restricted, consider and the anterior closed-type lock on the deep  related.