未萌出的下颌第二前磨牙牙长轴方向的Ｘ线分析汪平文玲英儿童的第一恒磨牙患龋率高，常导致其过早丧失，临床上有时发现萌出的下颌第二前磨牙在此情况下出现远中移位。现对未萌出的下颌第二前磨牙长轴方向进行Ｘ线片分析，研究在不同年龄和性别分布中，未萌出下颌第二前磨... X-ray analysis of the mandibular second premolar tooth axis Wang Pingwen Ling Ying The first premolar tooth decay in children with high prevalence of dental caries, often leading to its premature loss, is sometimes clinically found eruption mandibular second premolar in In this case there is a far shift. Is not the eruption of mandibular second premolar long axis X-ray film analysis of different age and gender distribution, did not erupt the mandibular second pre-grinding ...