第一乳磨牙与第一前磨牙异位埋伏阻生1例
战园1,2, 刘鹤1,

Unerupted first deciduous molar located higher to the first premolar: a case report
ZHAN Yuan1,2, LIU He1,
口内上颌牙合面相,左侧上颌第一乳磨牙未萌出