Fingers or digits have an important role in the function and aesthetics. The loss of the digits leads to functional and psychological problems [1–3]. Silicone finger prostheses have lifelike appearance . Finger or digital prosthesis have been also used to prevent and protect ulcerated finger tips in patients with microangiopathy of fingers .
Finger prosthesis often has low durability when compared to facial prosthesis. It needs to be frequently replaced as it can be irreversibly stained or discolored due to repeated PF-573228 and removal. Fabrication of new finger prosthesis is time consuming and requires several clinical and laboratory steps . Even after fabrication of the finger prosthesis, intricate adjustments are necessary during the delivery visit to obtain a retentive fit and proper marginal adaptation. In some scenarios, a well-fitted prosthesis may need to be replaced due to discoloration or wear of the existing prosthesis.
Unlike other extraoral prosthesis, finger prostheses are commonly retained with the friction-fit or with implant [2,6,7]. The use of friction-fit is a common and economical method of retention for finger prosthesis, and is useful when a part of the stump is remaining [2,6]. Although digit prosthesis often has a high patient acceptance, retention, marginal adaptation, and color matching are important aspects that should be considered during the fabrication.
However, the impression material should be properly mixed to prevent porosities and the impression should be carefully poured to obtain an accurate working cast. A key groove or an anti-rotation feature should also be incorporated in the impression for the proper orientation of the stone stump during the duplication process. Before removal of the working model from the impression, sufficient time should be given for the wax to set in order to prevent distortions of the wax. There may be loss of some anatomical details during the duplication process and the wax replica may need minor adjustments and texturing. A ring can also be worn to hide the margins (Fig. 10). In case the previous prosthesis is significantly damaged, the duplication of previous prosthesis might not be a good option.