Pollicization (or pollicisation) is a hand surgery technique in which a thumb is created from an existing finger. This consists of surgically migrating the index finger to the position of the thumb in patients who are either born without a functional thumb (most common). Also in an adult who has lost thumb due to trauma this technique can be used.
The presence of an opposable thumb is considered important for manipulation of most objects in the physical world. Children born without thumbs often adapt to the condition very well with few limitations therefore the decision to proceed with pollicization lies with the child’s parents with the recommendation of their surgeon. Persons who have grown to adulthood with functional thumbs and then lost a thumb find it highly beneficial to have a thumb reconstruction, not only from a functional but from a mental and emotional standpoint.