["Principalisation" of pollicization in congenital conditions. Technical modifications for functional and aesthetic improvement].

After reviewing our experience of pollicization in congenital differences, we found that classical techniques have several weak points concerning function and appearance. Abduction is frequently insufficient and adduction quite weak. Aesthetically, the thumb has a slender aspect and the web fold is absent and the commissure looks more as a cleft. We tried to " principalize" the issues to propose some technical modifications for improvement of function and appearance.