Is insertion torque correlated to bone–implant contact percentage in the early healing period? A histological and histomorphometrical evaluation of 17 human‐retrieved dental implants
- 7 July 2009
- journal article
- research article
- Published by Wiley in Clinical Oral Implants Research
- Vol. 20 (8), 778-781
- https://doi.org/10.1111/j.1600-0501.2008.01599.x
Abstract
Objective: A precise and scientifically established method for the evaluation of the bone quality/primary stability is the measure of the insertion torque (IT). The aim of this study was a comparison between the IT values and the bone–implant contact percentage (BIC) of human implants retrieved after a 4/8‐week healing period. Materials: Seventeen implants, all with a sandblasted and acid‐etched surface, were evaluated in the present study. Methods: The implants had been retrieved for different causes, after 4/8 weeks, with a 5 mm trephine bur, and immersed in 10% buffered formalin to be processed for histology. Results: A not statistically significant correlation was found between IT and BIC (P≤0.892). Conclusions: In the present study on human‐retrieved implants, no statistically significant correlation was found between the IT values and BIC. These results could be due to a lack of relationship between bone structure and IT, or to the fact that primary stability may not only be influenced by bone volumetrical density and/or bone trabecular connectivity but also by the thickness and density of the cortical layer. Moreover, the present knowledge of the bone microstructure is not enough to explain the relationship of bone quality and primary implant stability.Keywords
This publication has 17 references indexed in Scilit:
- Relevance of resonance frequency analysis to evaluate dental implant stability: simulation and histomorphometrical animal experimentsClinical Oral Implants Research, 2007
- Clinical study on the primary stability of two dental implant systems with resonance frequency analysisClinical Oral Investigations, 2007
- Resonance frequency analysis in relation to jawbone characteristics and during early healing of implant installationClinical Oral Implants Research, 2007
- Primary Stability of Simultaneously Placed Dental Implants in Extraoral Donor Graft Sites: A Human Cadaver StudyJournal of Oral and Maxillofacial Surgery, 2007
- Resonance frequency measurements of implant stability in the dog mandible: experimental comparison with histomorphometric dataInternational Journal of Oral & Maxillofacial Surgery, 2006
- Predicting osseointegration by means of implant primary stabilityClinical Oral Implants Research, 2004
- Implant stability and histomorphometry: a correlation study in human cadavers using stepped cylinder implantsClinical Oral Implants Research, 2003
- Resonance frequency measurements of implant stability in viva. A cross‐sectional and longitudinal study of resonance frequency measurements on implants in the edentulous and partially dentate maxilla.Clinical Oral Implants Research, 1997
- Implant stability related to insertion torque force and bone density: An in vitro studyThe Journal of Prosthetic Dentistry, 1995
- Identification of bone quality in conjunction with insertion of titanium implants. A pilot study in jaw autopsy specimens.Clinical Oral Implants Research, 1995