Clinical evaluation of small-diameter implants in single-tooth and multiple-implant restorations: a 7-year retrospective study

Int J Oral Maxillofac Implants. Sep-Oct 2004;19(5):703-9.


Purpose: Placement of small-diameter implants often provides a solution to space-related problems in implant restoration. This 7-year retrospective study presents results from 192 small-diameter implants placed in 165 patients from 1992 to 1996.

Materials and methods: The dental records of each patient were reviewed. The implants, which were either 2.9 mm or 3.25 mm in diameter, were placed by 2 different surgeons. All prosthetic appliances were fabricated by the same prosthodontist. Ninety-four implants supported single-tooth cemented restorations; the remaining 98 implants supported cemented or screw-retained partial prostheses.

Results: The total implant survival rate was 95.3%. Four implants were lost at second-stage surgery, and 5 more were lost after loading.

Discussion: Small-diameter implants demonstrated a survival rate similar to those reported in previous studies of standard-size implants.

Conclusions: The results suggest that small-diameter implants can be successfully included in implant treatment. They may be preferable in cases where space is limited.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Cementation
  • Crowns
  • Dental Abutments
  • Dental Implants*
  • Dental Implants, Single-Tooth*
  • Dental Prosthesis Design*
  • Dental Prosthesis, Implant-Supported
  • Dental Restoration Failure
  • Denture, Partial, Fixed
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Middle Aged
  • Periodontal Index
  • Retrospective Studies
  • Surface Properties
  • Survival Analysis


  • Dental Implants