Accuracy of detecting and measuring buccal bone thickness adjacent to titanium dental implants – a CBCT in vitro study

Publication date: Available online 27 June 2018
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Gabriela Salatino Liedke, Rubens Spin-Neto, Heloisa Emilia Dias da Silveira, Lars Schropp, Andreas Stavropoulos, Ann Wenzel
ObjectivesTo assess the accuracy of detecting and measuring buccal bone thickness (BBT) adjacent to titanium implants in CBCT images.Study DesignTitanium implants (one, two, or three), abutments, and metal-ceramic crowns were inserted into 40 bone blocks with various BBTs. CBCT images were acquired in various settings: voxel size (0.2 and 0.13 mm) and reconstruction section thickness (2.0 and 5.0 mm), and assessed by three examiners. True BBT was measured in digital photographs of the bone blocks. Buccal bone detection was evaluated by sensitivity and specificity. BBT was evaluated by one-way ANOVA between the true and the CBCT measurements, and by calculating the difference between the true measurement and the CBCT measurement (Di-BBT).ResultsDetection of buccal bone exhibited high sensitivity (0.86 – 1) and low specificity (0.14 – 1). More implants in the FOV, large voxel size, and thick image reconstruction sections had a negative impact on buccal bone detection. ANOVA showed statistically significantly larger BBT for the CBCT measurements in all settings (1.07 – 1.21 mm) compared with the true measurements (0.85 mm). Di-BBT was mostly within 0.5 mm.ConclusionsBBT adjacent to titanium implants is overestimated when evaluated in CBCT cross-sectional images.



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