Olason A T, Döhler J R
Orthopädische Universitätsklinik Kiel, Federal Republic of Germany.
Arch Orthop Trauma Surg (1978). 1988;107(6):348-53. doi: 10.1007/BF00381060.
Congenital triangular deformity of the foot bones may occur in phalanges and metatarsals. As it resembles the Greek letter delta it is called "delta phalanx" and "delta metatarsal". We report on 19 delta formations in ten patients with foot polydactyly. Our long-term follow-up of these patients indicates four stages in the ossification process: no ossification of the epiphysis; appearance of single or multiple ossification centers; unification of the ossification centers with nonosseous tissue between the diaphysis and the epiphysis; and, finally, complete ossification. Pathogenetically, the delta formation may represent an intermediate stage in the bifurcation process of a polydactylic ray. Splitting longitudinally in a direction from distal to proximal, it is the root of the bifurcated toe ray.
足部骨骼的先天性三角形畸形可能发生在趾骨和跖骨。由于其形状类似于希腊字母δ，因此被称为“δ趾骨”和“δ跖骨”。我们报告了10例足部多指畸形患者中的19处δ形结构。我们对这些患者的长期随访表明，骨化过程有四个阶段：骨骺无骨化；出现单个或多个骨化中心；骨化中心与骨干和骨骺之间的非骨组织融合；最后，完全骨化。从发病机制上讲，δ形结构可能代表多指射线分叉过程中的一个中间阶段。它从远端向近端纵向分裂，是分叉趾射线的根部。
