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

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Presented at

EAO-2018

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Abstract

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 Osstell® device and the values ​​of the hounsfield unit (HU) obtained in the software Vision of iCAT® CBCT scans. Twenty-nine selected patients were submmited to CBCT scans in ICAT®, 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 Instat®, in which Pearson's correlation test was applied. No statistically significant correlation of ISQ and HU was observed for both implants. The HU values ​​obtained in the tools available in the i-CAT Vision® software did not present a statistically significant correlation with the stability coefficient (ISQ) values ​​of the Straumann BLT® and SIN Unitite® implants in posterior region of jaw.

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© Copyright 2020 Morressier GmbH.
All rights reserved.