Anatomy, biomechanics, and pathomechanics of lesser digital deformities.

This article discusses anatomy and normal biomechanics of the lesser digits. The pathomechanics that may lead to digital deformities or the hammered digit syndrome are discussed also. The importance of identifying the causes of the hammered digit syndrome prior to surgical correction is emphasized. Knowing the causes can help determine effective postoperative control that can neutralize the deforming forces.