An elastomeric fluid- filled prosthetic implant (240) having a shell (244) and a patch (242) providing a reinforced access region on the shell for introduction of manufacturing implements, such as a gel -filling tool. The shell may cover the entire inner face of the patch, or a substantial part thereof, and a peripheral edge of the patch and the shell cooperate to form a flush interface with no sudden surface steps on both interior and exterior surfaces of the implant. The removal of any surface steps eliminates undesirable tactile discontinuities and stress points that may cause the shell wall to wear or may irritate the surrounding tissues.
