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Volume 22 , Issue 5
September/October 2007
Pages 791–800

Three-Year Evaluation of Single-Tooth Implants Restored 3 Weeks After 1-Stage Surgery

Lyndon F. Cooper, DDS, PhD/Stefan Ellner, BDS/John Moriarty, DDS, MS/David A. Felton, DDS, MS/David Paquette, DMD, MPh, DMSc/Anthony Molina, DDS, MS/Nancy Chaffee, DDS, MS/Peter Asplund, BSc/Rex Smith, DDS/Carin Hostner, DDS, PhD

PMID: 17974115

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) Int J Oral Maxillofac Implants 2007;22:791–800

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

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