title: Ankylosis of nonresorbable hydroxyapatite graft material as a contributing factor in recurrent periodontitis.
abstract: Many studies have shown that alloplastic bone grafts are clinically stable and safe. Nevertheless, postoperative problems such as ankylosis and root resorption are associated with alloplastic bone grafts. This report examined two cases of ankylosis of nonresorbable hydroxyapatite (NHA) alloplastic grafts associated with recurrent periodontitis. There was no clear border between the NHA particles and dentin. The particles were irregularly shaped and had plaque on the surfaces. It is postulated that ankylosis of NHA particles and dentin is a contributing factor in recurrent periodontitis.
authors.affiliation: Department of Periodontology, Division of Advanced Dental Treatment, Nihon University School of Dentistry, Dental Research Center, Tokyo, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Yoshinuma
authors.forename: Shuichi
authors.initials: S
authors.lastname: Sato
authors.forename: Tomihisa
authors.initials: T
authors.lastname: Fukuyama
authors.forename: Masakazu
authors.initials: M
authors.lastname: Murai
authors.forename: Koichi
authors.initials: K
authors.lastname: Ito
mesh_terms: D000328:Adult; D000368:Aged; D001672:Biocompatible Materials / Q000009:adverse effects*; D018786:Bone Substitutes / Q000009:adverse effects*; D003728:Dental Calculus / Q000209:etiology; D003773:Dental Plaque / Q000150:complications; D003804:Dentin / Q000473:pathology; D017886:Durapatite / Q000009:adverse effects*; D005260:Female; D005547:Foreign Bodies / Q000209:etiology; D006097:Granulation Tissue / Q000473:pathology; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D010514:Periodontal Pocket / Q000209:etiology; D010518:Periodontitis / Q000209:etiology*; D012008:Recurrence; D014086:Tooth Mobility / Q000209:etiology
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D017886:Durapatite