目的　应用CT数据三维重建技术及CAD（computeraided design）技术，估算再造手指整形皮瓣的形状。  方法　复制20名健康成人正常右手拇、示、中、环指、右足第2趾的石膏模型，采集其三维CT数据并重建，用计算机软件模拟趾腹减凸术、趾狭窄膨隆术，勾画出所需皮瓣形状。  结果　模拟趾狭窄膨隆术所需皮瓣形态大致分为两型：蟹爪型和十字型。模拟趾腹减凸术所需皮瓣也可分为两型：水滴型和椭圆型。同一患者的拇、示、中、环指的皮瓣基本属于同一型。  结论　本方法可较为直观地估算出第2趾与拇、手指指腹的形态差异，可以获得整形皮瓣的立体形状，皮瓣形状具有较大的个体差异，因此为每一名患者个性化设计才能达到更好的手术效果。

　Objective　This study aimed to introduce a new method using 3-D reconstruction and CAD（computer aided design）techniques to evaluate the morphological difference between second toe and fingers.  Methods  The plaster models for the first to fourth fingers and second toe in the right side of 20 healthy persons were included in the study. To get the 3-D reconstruction data of these models with helical CT set. Software was used to simulate the toe pulp flap harvesting surgery and flap transplantation, and  the 3-D configuration of flap was obtained.   Results   The simulant toe pulp flap could be divided into teardrop and elliptical shape. The simulant transfer flap could be divided into crab claw and cross shape. The flaps of the first to fourth fingers from the same person belonged to the some type.   Conclusion   The new method can provide  accurace three-dimensional evaluation of the shape of the flap, which could be used for the preoperative design.