摘要并指畸形是2个及以上手指指间软组织和(或)骨骼相连接的畸形，根据指间皮肤软组织并连的程度可将并指分为不完全性并指和完全性并指。完全性并指矫正包括指间分离、指蹼重建、指体皮肤缺损的覆盖和指端成形，其中指端成形的关键步骤是并指分离后指甲侧甲襞的成形，其成形方式与术后指端外观关系密切。该文通过回顾文献，就相关解剖、指甲并连分型、完全性并指指甲侧甲襞成形术式、原理及应用情况进行介绍。

abstractsSyndactyly is a deformity that the soft tissues and (or) bones of two or more fingers are joined together. Based on the severity of interphalangeal skin-soft tissue juxtaposition, syndactyly is categorized as: incomplete syndactyly and complete syndactyly. Complete syndactyly correction includes interphalangeal separation, web-space reconstruction, coverage of skin defects on the body of the finger, and fingertip formation. The key step is the formation of the lateral nail fold after the separation of the syndactyly, and the shaping technique is closely related to the postoperative appearance of the fingertip. By reviewing the literatures, this article presents an overview of the relevant anatomy, nail juxtaposition typing, and the principles and applications of the complete juxtaposition nail lateral nail fold molding procedure.