Affiliation:
1. Department of Prosthetic Dentistry, School of Dental Medicine Philipps‐University Marburg/Lahn Marburg/Lahn Germany
2. Alcedis GmbH Giessen Germany
3. Department of Radiology University of Michigan Ann Arbor Michigan USA
Abstract
AbstractAimThe aim of this study on native human cadavers was to compare clinical, sonographic, and radiological measurements of fenestrations, dehiscences, and 3‐wall bone defects on implants.Materials and MethodsThe examination was carried out on five human mandibles. After the insertion of 27 implants, dehiscences (n = 14), fenestrations (n = 7) and 3‐wall bone defects (n = 6) were prepared in a standardized manner. The direct measurement of the bone defects was carried out with a periodontal probe and the radiological examination was carried out using digital volume tomography (DVT). The ultrasound examination (US) was performed using a clinical 24‐MHz US imaging probe. Means and standard deviations of the direct, US, and DVT measurements were calculated. Measurements were statistically compared using the Pearson correlation coefficient and Bland–Altman analysis.ResultsBone defects were on average 3.22 ± 1.58 mm per direct measurement, 2.90 ± 1.47 mm using US, and 2.99 ± 1.52 mm per DVT assessment. Pairwise correlations of these measurements were R = .94 (p < .0001) between direct and US, R = .95 (p < .0001) between DVT and US, and R = .96 (p < .0001) between direct and DVT. The mean differences of the measurements (and 95% CI) between direct and US was 0.41 (−0.47 to 1.29), US and DVT 0.33 (−0.30 to 0.97), and direct and DVT 0.28 (−0.50 to 1.07).ConclusionAll peri‐implant bone defects could be identified and sonographically measured. US measurements showed a strong correlation with direct and DVT measurements. The sonographic measurement accuracy was highest for dehiscences, followed by fenestrations and 3‐wall bone defects.