Analysis of correlation between hounsfield units of CBCT scans and implant primary stability in implant stability quotient (ISQ)

The success of oral rehabilitations with dental implants depends on their stability in bone structure. Bone structure analysis is crucial for achieving favorable implant primary stability. The aim of this study was to evaluate the correlation between the primary stability of two types of implants, measured by the Osstellu00ae device and the values u200bu200bof the hounsfield unit (HU) obtained in the software Vision of iCATu00ae CBCT scans. Twenty-nine selected patients were submmited to CBCT scans in ICATu00ae, in which the appropriate volume for the conventional installation of implants in the mandible posterior region was ratified. Straumann BLT SLActive implants were used 4.1 x 8mm and SIN UNITITE 4.3 x 8.5mm. All CT scans were performed with the following specifications: FOV 16cm diameter / 6cm height; resolution 2 voxel / 26.9 seconds, acquisition time 8.9 seconds, KVP 120 and mAs 18.54. Density assessments were performed in the transversal window with a rectangular section with similar size of the planned implant for the ridge. Resonance frequency analyzes were performed shortly after implant installation. The research data were exported to the statistical program GraphPad Instatu00ae, in which Pearson's correlation test was applied. No statistically significant correlation of ISQ and HU was observed for both implants. The HU values u200bu200bobtained in the tools available in the i-CAT Visionu00ae software did not present a statistically significant correlation with the stability coefficient (ISQ) values u200bu200bof the Straumann BLTu00ae and SIN Unititeu00ae implants in posterior region of jaw.