Relationship Between Peri-implant Bone Properties and Implant Stability

Objectives: The application of resonance frequency analysis (RFA) has made it possible to non-invasive measure implant stability quotient (ISQ), crestal bone height (DIB) and others at any time during the course of implant treatment and loading. This study is a novel way of looking at ISQ and DIB. The proposed study will investigate these correlations.

 Methods: Seventeen patients (14 female, 3 male) with mean age of 52 years (range, 29 to 74 years) each received two Straumann^® implants (30 in the mandible, 4 in the maxilla). The implants were restored and loaded with individual temporary prostheses at 6 weeks and with definitive prostheses at 12 weeks.

Results: The ISQ had significant difference over time. At placement the ISQ was 61.8±6.7; it decreased slowly to smallest value 58.7±6.8 at 28 days; and then increased to largest value 63.7±5.4 at 90 days.

The peri-implant bone crestal height decreased after SLA implant placement and did change significantly overtime, as expected. The largest decrease was at 90 days (0.93±0.8) mm; and then it recovered to (0.58±0.4) mm at one year.

There was no significant difference between stability and bone loss.

Conclusions: The findings showed no significant relationship between implant stability and bone height.

This work was supported by NIDCR, Grant # DE14318-05 for the CO*STAR Program.