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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 22 (2007), No. 5     15. Sep. 2007
Int J Oral Maxillofac Implants 22 (2007), No. 5  (15.09.2007)

Page 791-800, PubMed:17974115

Three-Year Evaluation of Single-Tooth Implants Restored 3 Weeks After 1-Stage Surgery
Cooper, Lyndon F. / Ellner, Stephan / Moriarty, John D. / Felton, David A. / Paquette, David / Molina, Anthony L. / Chaffee, Nancy / Asplund, Peter / Smith, Rex G. / Hostner, Carin
Purpose: The possibility of expediting dental implant therapy by early or immediate loading protocols requires long-term clinical investigation. The aim of this prospective cohort trial was to determine the 3-year implant success rate and prosthesis complications associated with functional loading 3 weeks after 1-stage placement of Astra Tech single-tooth implants replacing maxillary anterior teeth. A secondary objective was to determine peri-implant tissue responses at these implants.
Materials and Methods: The peri-implant bone and mucosal conditions of 43 implants in 39 subjects were radiographically and clinically measured 3 years after implant placement.
Results: Of the 48 patients originally treated, 39 patients and 43 implants were examined at the 3-year time point. Three of 54 implants failed within the first year. No additional failures were recorded since the 12-month reporting period. Peri-implant bone levels were stable for the 3-year period following implant placement. The change in marginal bone levels after 3 years was 0.42 ± 0.59 mm. Papilla growth was measured at 1 and 3 years (0.61 ± 0.95 mm and 0.74 ± 0.79 mm, respectively). The buccal peri-implant tissue dimensions at the gingival zenith also increased at 1 and 3 years (0.34 ± 0.94 mm and 0.51 ± 1.42 mm, respectively). No abutment screw loosening or fracture occurred.
Discussion and Conclusions: Early loading of endosseous dental implants placed in healed ridges offers select benefits to clinicians and their patients. (Clinical Trial)

Keywords: early loading, immediate loading, implant success, peri-implant esthetics, prospective clinical trials, single-tooth implants