对完全性纵折后牙是否应作保存治疗 ,临床上有两种不同的看法。有一些学者认为完全性纵折牙常引起不可逆转的牙髓牙周病变 ,治疗困难 ,主张拔除 (1) 。而另一些学者则发现完全性纵折牙即使折线波及髓室底 ,只要及时完善处理 ,折断处可有结缔组织长入且有牙骨质沉积而愈合 (2 ,3 There are two different viewpoints about whether the posterior teeth should be preserved and treated completely. Some scholars believe that the vertical split teeth often cause irreversible pulpontal disease, treatment difficulties, advocated the removal of (1). Others, however, find that even if the fold line affects the pulp chamber, complete longitudinal fangs can heal with connective tissue growth and cementum deposition as long as they are properly treated (2,3