本文研究是测量恒牙髓室到牙齿表面的距离,为临床口腔医生作烤瓷、金属修复和钉固位修复时提供髓腔形态学的知识。避免在磨牙时造成意外的穿髓或旁穿。作者选择28—37岁的病人中拔下的252颗恒牙,这些牙都未经修复过,亦无龋坏和磨损。将其按照牙齿类别和上下颌分组,用磨开的方法,分别测量从切缘、牙尖顶到髓 In this study, the distance between the permanent pulp chamber and the tooth surface was measured to provide the knowledge of the morphology of the pulp cavity for the clinical stomatology of porcelain, metal repair and nail retention. Avoid accidental piercing or bypassing while molars. The author chose 252 permanent teeth that were removed from patients 28-37 years of age and none of these teeth had been repaired or carious or worn. According to the type of teeth and the upper and lower jaws grouping, with open method, were measured from the margin, the apex of the cusp to the pulp