Replacing posterior teeth with freestanding implants: four-year prosthodontic results of a prospective study

J Am Dent Assoc. 1998 Aug;129(8):1097-102. doi: 10.14219/jada.archive.1998.0384.


This article presents prospective four-year prosthetic results of the placement of 432 posterior freestanding, conventionally cemented prosthetic tooth implants in posterior edentulous spaces using the Bicon Dental Implants system (Bicon Dental Implants). Over four years, 0.74 percent of the abutments loosened, 0.5 percent of the abutments fractured, and 2.47 percent of the crowns experienced porcelain fracture, (all porcelain fractures occurred at time of placement). This low rate of problems appears to make free-standing single-tooth implant restorations a reliable solution to treating posterior edentulism.

MeSH terms

  • Bicuspid*
  • Cementation
  • Crowns
  • Dental Abutments
  • Dental Implantation, Endosseous*
  • Dental Implants, Single-Tooth*
  • Dental Porcelain / chemistry
  • Dental Prosthesis Design
  • Dental Prosthesis, Implant-Supported
  • Dental Restoration Failure
  • Female
  • Follow-Up Studies
  • Humans
  • Jaw, Edentulous, Partially / rehabilitation*
  • Jaw, Edentulous, Partially / surgery
  • Male
  • Molar*
  • Prospective Studies
  • Reproducibility of Results
  • Survival Analysis
  • Treatment Outcome


  • Dental Porcelain