A Comparative Clinical And Radiological Analysis To Correlate The Bone Density And Primary Implant Stability Using Cone Beam Computerized Tomography And Insertion Torque

Abstract

Aim / objectives: The aim of this study was to assess the bone quality with density values obtained by cone beam computed tomography (CBCT) and to determine the correlation between bone density and primary stability of implants using insertion torque values. Materials and methods: Twenty Root Form Implants were inserted into individuals with edentulous areas in upper and lower jaws in whom rehabilitation with implants was possible. The bone densities of implant recipient sites were preoperatively determined by the density value using CBCT. The maximum insertion torque value of each implant was recorded manually using a torque wrench with calibrations. Spearman's correlation coefficient was calculated to evaluate the correlations among density values and insertion torque values. Results: The density values in Hounsfield units ranged from 209.91 to 667.13Hu. The mean density value and insertion torque of all implants were 464.69 + 135.74 Hu and 49.0 + 8.20 Ncm respectively. There was a highly significant correlation statistically between bone density and insertion torque (rs 0.89, P< 0.001). Conclusion: The bone density evaluated by CBCT showed a high correlation with the primary stability of the implants (insertion torque). Therefore, the use of a CBCT pre-operatively may greatly help the implant surgeon in predicting the primary implant stability. Hence CBCT can be used as a predictor diagnostic tool for implant success.