Correlation of CBCT analysis derived bone density parameters with primary implant stability - a clinical study
2019
Background/Aim. This study aimed to examine the correlation of CBCT analysis
derived bone density with primary stability value. Methods. Clinical
prospective experimental study was conducted in 38 healthy patients missing
one tooth in the lateral region. It was planned to install Bredent Blue Sky
Narrow self-taping dental implants with dimensions 3.5 x 10 mm. During
preoperative preparation, a CBCT scan was performed on Planmeca apparatus,
followed by pre-implantation measurements and planning in the CBCT apparatus
software (Romexis). The mean value of the average bone volume is
automatically generated and expressed in Hounsfield units. Upon implant
placement, we performed measurements of the primary implant stability using
Osstell apparatus. Results. Of the thirty-eight patients included in the
study, there were 68.4% male patients and 31.6% female patients. The
arithmetic mean of the measured bone density of all subjects in the study
amounted to 536.2 HU. The arithmetic mean of dental implant primary
stability for all subjects in the study was 68.7 ISQ. There is statistically
significant strong positive connection between HU and ISQ (r = 0.744, p
<0.001). Higher HU values are connected to higher ISQ values. In the
multivariate linear regression model, statistically significant predictors
of higher ISQ values are as follows: male (B = 4.669; p = 0.047) and higher
HU values (B = 0.032; p <0.001). Conclusion. We have shown in our clinical
study that there is a statistically significant strong positive correlation
between the bone density expressed in HU units measured in the software of
the CBCT device and the primary stability of dental implants expressed in
ISQ units.
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