title: Tympanoplasty with calcium phosphate.
abstract: In 35 patients, with an average follow-up period of 2 1/2 years, the middle ear was reconstructed with prostheses of hydroxyapatite, which is the main substance of living bone tissue. In case of a missing incus, an interposition prosthesis of dense hydroxyapatite was used. Defects in the bony posterior canal wall were reconstructed with a canal wall prosthesis of porous hydroxyapatite and cavities with a barefoot plate were reconstructed with a total alloplastic middle-ear implant, consisting of a canal wall of porous hydroxyapatite and a chain of wire and dense hydroxyapatite. With these prostheses, radical surgery of the middle ear can be combined with a physiological reconstruction.
mesh_terms: D001299:Audiometry; D001672:Biocompatible Materials; D002130:Calcium Phosphates; D017886:Durapatite; D005500:Follow-Up Studies; D006801:Humans; D006882:Hydroxyapatites; D014433:Tympanoplasty / Q000379:methods*
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; D006882:Hydroxyapatites; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; D017886:Durapatite; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous