title: [Long-term outcome of a silastic semilunar bone prosthesis].
abstract: Eight silastic implants of the lunate bone were inserted between 1980 and 1984 on 8 patients. Seven patients were seen, at a ten year follow-up visit and were satisfied with the results. However, STT osteoarthritis secondary to the carpal collapse had to be stabilized by a triscaph arthrodesis. The clinical course showed a clear improvement of force and mobility in a first phase, followed by progressive deterioration ending in a return to preoperative values. Multiple intracarpal cysts were found radiologically in all wrists as well as in the distal radius in two cases and in the metacarpal bones in 3 cases. The height of the prosthesis was decreased by about 36%. Carpal collapse and ulnar translation showed a statistically significant progression. According to these findings, silastic prostheses should no longer be recommended.
authors.affiliation: Orthopädische Universitätsklinik Balgrist, Zurich.
authors.forename: S
authors.initials: S
authors.lastname: Wachtl
authors.forename: G
authors.initials: G
authors.lastname: Sennwald
authors.forename: M
authors.initials: M
authors.lastname: Rodriguez
mesh_terms: D000293:Adolescent; D000328:Adult; D003560:Cysts / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007592:Joint Diseases / Q000209:etiology; D007595:Joint Prosthesis / Q000009:adverse effects; D012667:Lunate Bone / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology; D012826:Silicone Elastomers; D013314:Stress, Mechanical; D016896:Treatment Outcome; D014955:Wrist Joint / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*
chemical_list: D012826:Silicone Elastomers