title: Ossiculoplasty using hydroxyapatite prostheses: long-term results.
abstract: The surgical results of ossicular chain reconstruction using a hydroxyapatite prosthesis were evaluated in 106 ears of 101 patients who were followed up for > 5 years. Successful reconstruction was defined as: (1) postoperative air-bone gap of </= 20 db; or (2) postoperative air conduction better than 40 db; or (3) hearing gain better than 15 db. Success in hearing was obtained in 63/106 ears (59%) at 1 year; 44/65 ears (68%) in P-type (short columella) and 19/41 ears (46%) in T-type (long columella). By the fifth year, the overall success rate had deteriorated to 50%: i.e. 39/65 ears (60%) in P-type and 14/41 ears (34%) in T-type. Extrusion of the prosthesis occurred in 17 ears (16%) with a mean postoperative period of 27.7 months. The present results indicate that hydroxyapatite is a suitable material for an ossicular prosthesis, although the incidence of extrusion is high when it is placed in contact with the tympanic membrane.
authors.affiliation: Department of Otolaryngology, Ehime University School of Medicine, Ehime, Japan. shino@m.ehime-u.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Shinohara
authors.forename: K
authors.initials: K
authors.lastname: Gyo
authors.forename: T
authors.initials: T
authors.lastname: Saiki
authors.forename: N
authors.initials: N
authors.lastname: Yanagihara
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001672:Biocompatible Materials; D002648:Child; D018424:Cholesteatoma, Middle Ear / Q000601:surgery; D002908:Chronic Disease; D017886:Durapatite; D005260:Female; D005500:Follow-Up Studies; D006309:Hearing; D006801:Humans; D008297:Male; D008875:Middle Aged; D009998:Ossicular Prosthesis; D019933:Ossicular Replacement; D010033:Otitis Media / Q000601:surgery
chemical_list: D001672:Biocompatible Materials; D017886:Durapatite