title: Bone reactions adjacent to titanium implants with different surface characteristics subjected to static load. A study in the dog (II).
abstract: The purpose of the present study was to compare bone reactions adjacent to titanium implants with either a titanium plasma-sprayed (TPS) or a machined surface subjected to lateral static loading induced by an expansion force. In 3 labrador dogs, the 2nd, 3rd and 4th mandibular premolars were extracted bilaterally. 12 weeks later, 2 implants with a TPS surface were placed in one side and 2 implants with a machined surface were placed in the contralateral side. Twelve weeks after implant installation, crowns, connected in pairs with orthodontic expansion screws, were fitted to the implants and a 0.6 mm wide expansion was initiated. Clinical registrations, standardized radiographs and fluorochrome labeling were carried out during a 24-week period of loading. Biopsies with the implants in situ were harvested and processed for ground sectioning. The sections were subjected to histologic and histometric examination. A higher marginal bone level was observed around implants with a TPS surface compared to machined implants. Furthermore, the values describing the amount of bone-to-implant contact at the bone/implant interface as well as the density of the peri-implant bone were lower at the machined than at the TPS implants.
authors.affiliation: Department of Prosthetic Dentistry, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Gotfredsen
authors.forename: T
authors.initials: T
authors.lastname: Berglundh
authors.forename: J
authors.initials: J
authors.lastname: Lindhe
mesh_terms: D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology; D000818:Animals; D001641:Bicuspid; D001706:Biopsy; D015519:Bone Density; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003442:Crowns; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D004285:Dogs; D005456:Fluorescent Dyes; D005500:Follow-Up Studies; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D016348:Osseointegration; D011859:Radiography; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D005456:Fluorescent Dyes; D014025:Titanium