Pollicization is the reconstruction of a new thumb by using one of the digits on the same hand - usually the index finger. It is indicated in a few rare situations:
For the congenital causes, typically pollicization is carried out before the age of two years to permit development of a prehensile grip with the reconstructed digit. After this time, compensatory grips may develop eg side-to-side pinch patterns between the index and middle fingers. Ideally, the index finger that is transferred is not too stiff as this will affect its function in the recipient site.
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