Table 3.

Recommended surgical reconstruction in various types of thumb duplication based on Wassels classification.

Recommended surgical reconstruction
Type of thumb	Surgery
Types I,III, V	Bilhaut Cloquet procedure (or modifications) in presence of angular deformity. In selected Type II also Bifid elements to be left to prevent angular deformity. Bifid elements removed at skeletal maturity.
Type II, IV, VI	Ablation of supernumerary thumb with collateral ligament reconstruction
Type VII	Ablation of triphalangeal thumb Retain biphalangeal thumb even when rudimentary