title: Radiographic analysis of a two-piece apatite implant: Part II. Preliminary report of 2-year observation.
abstract: Marginal bone height and bone density were evaluated for 2 years after two-piece dense hydroxyapatite implant (Apaceram) placement using standardized radiography and digital image processing. The chronological changes in marginal bone height were divided into three groups: Group I-level was constant or became higher with time; Group II-bone decreased gradually after superstructure placement; and Group III-bone decreased in height rapidly after abutment placement. Bone density around the successful Apaceram implant, especially in the crestal region, increased clearly. The results suggest that bone resorption/formation around the implant is related to occlusal stress, and that adequate occlusal stress should be exerted on the implant at each phase after the implant placement.
authors.affiliation: Department of Removable Prosthodontics, School of Dentistry, University of Tokushima, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ichikawa
authors.forename: M
authors.initials: M
authors.lastname: Miyamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Horisaka
authors.forename: M
authors.initials: M
authors.lastname: Horiuchi
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000473:pathology; D000539:Alveolar Process / Q000000981:diagnostic imaging*; D000540:Alveolar Ridge Augmentation; D015519:Bone Density; D015921:Dental Implants; D017886:Durapatite; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D016348:Osseointegration; D011475:Prosthesis Failure; D011856:Radiographic Image Enhancement
chemical_list: D015921:Dental Implants; D017886:Durapatite