title: A 24-year retrospective study of bone growth after implant placement.
abstract: This study quantifies the changes in bone height noted in the body of the edentulous mandibles when the load of the complete denture is born by an RA Ramus Frame Implant (Pacific Implant, Rio Dell, Calif). Eighty-three patients with implants were followed for 3 to 24 years. Pre- and postoperative panoramic films were taken and again at each succeeding 5-year follow-up. The results of the bone changes were gathered retrospectively and calculated. The data revealed a significant increase in bone height from 4.413 to 13 mm and statistically significant P values of <.0003 were determined. The growth of bone appears to be influenced by the design of the posterior feet, dominant chewing side, and a range of extreme atrophy from 5.9 mm to 15 mm. Also, the previously lost anatomical structures appear to repair, such as the luman of the mental foramen and the superior wall over the inferior alveolar canal. All mandibles were loaded postoperatively with an appliance having cutting bars and porcelain teeth or just porcelain teeth in both appliances.
authors.affiliation: Pacific Implant Company, 920 Rio Dell Avenue, Rio Dell, CA 95562, USA. robertspac@sbcglobal.net
authors.forename: Ralph A
authors.initials: RA
authors.lastname: Roberts
mesh_terms: D016301:Alveolar Bone Loss / Q000503:physiopathology / Q000534:rehabilitation; D001732:Bite Force; D001861:Bone Regeneration / Q000502:physiology*; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003826:Denture, Complete, Lower; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008334:Mandible / Q000502:physiology; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D013193:Stainless Steel; D014025:Titanium
chemical_list: D015921:Dental Implants; D013193:Stainless Steel; D014025:Titanium