[Long-term results following implantation of breast prosthesis with a polyurethane coating].

42 of 63 cases of bilateral augmentation mammaplasty using polyurethane-covered prostheses, so-called Ashley "Natural-Y" prostheses were seen 15 to 17 years after the primary operation. Two implants had previously been replaced by Cronin gel type prostheses for various reasons. The 84 breasts which were examined in follow-up compared well with breasts augmented with other devices as far as capsular contracture was concerned. The extreme difficulty of removing these implants because of the deterioration of the polyurethane cover makes any further use of these implants unjustifiable.