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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 25 (2010), No. 1     15. Jan. 2010
Int J Oral Maxillofac Implants 25 (2010), No. 1  (15.01.2010)

Page 45-48, PubMed:20209186


Mineralized Bone-Implant Contact and Implant Stability Quotient in 16 Human Implants Retrieved after Early Healing Periods: A Histologic and Histomorphometric Evaluation
Degidi, Marco / Perrotti, Vittoria / Piattelli, Adriano / Iezzi, Giovanna
Purpose: Resonance frequency analysis (RFA) is a quantitative method for the measurement of implant stability. Information about the significance of RFA measurements and the relationship between RFA values and implant osseointegration, success, or failure is important from a clinical point of view. In a previous study the authors observed a strong correlation between RFA values and mineralized boneimplant contact percentage in implants retrieved after 6 months. The aim of the present histologic and histomorphometric study was to determine whether the same correlation existed at earlier time points, specifically in implants retrieved after 4 or 8 weeks.
Materials and Methods: Sixteen implants, all with a sandblasted and acid-etched surface, were evaluated in the present study. The implants were retrieved for different reasons after 4 or 8 weeks of healing with a 5-mm trephine bur and immersed in 10% buffered formalin to be processed for histology.
Results: A statistically insignificant correlation was detected between RFA values and mineralized bone-implant contact percentage (P <= .5502) using the Friedman and Spearman tests.
Conclusion: RFA should reflect the bone anchorage of the implant; however, the relationship between bone structure and RFA is not fully understood.

Keywords: bone-implant contact, histology, histomorphometry, implant stability