Aims: Repeated radiographic visualization under standardized conditions leads to additional exposure to ionizing radiation. We therefore analyzed two less invasive methods in assessing periimplant bone height and implant stability. Material and methods: eight cylindrical, screw-type dental implants with machined surfaces (were polymerized into blocks of auto-curing acrylic material to simulate
evenly osseo-integrated implants. Circular peri-implant bone defects were created by removing the resin around each implant with a trephine bur and water irrigation. Data were transferred to the statistical software package JMP, version 4.01 (SAS Institute Inc. 2000). The statistical analysis included explorative data analysis, estimation of coefficients of variation, analysis of variance, pairwise comparing of means according to the Tukey-Kramer honestly significant difference (HSD) post hoc test procedure, and linear regression analyses.
Results: A linear regression analysis showed a statistically significant linear association between both methods for measuring implant stability. Conclusions: Together with the results from our previous study on the reliability of the two methods it can
be concluded that in an in vitro model the Periotest and Osstell instruments are both suitable to detect a decrease
in implant stability as indicated by peri-implant bone loss. Different designs of abutments, connectors, and implant neck designs are expected to be of influence on the result of the present study. The results therefore need to be transferred to clinical situations only with caution.
- ANALYSE OF RESONANCE
- bone loss
- FREQUENCY ANALYSIS
- IMPLANT STABILITY