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Effect of section thickness on cone beam computed tomography‐based measurements of intrabony defects compared with clinical measurements
Author(s) -
NikolicJakoba Natasa,
Barac Milena,
Jankovic Sasa,
Aleksic Zoran,
SpinNeto Rubens,
Wenzel Ann
Publication year - 2021
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1002/jper.20-0338
Subject(s) - cone beam computed tomography , medicine , radiography , dental alveolus , intraclass correlation , dentistry , significant difference , orthodontics , periodontitis , nuclear medicine , computed tomography , radiology , clinical psychology , psychometrics
Background It is unknown whether cone beam computed tomography (CBCT) image reconstruction characteristics, including section thickness, may affect linear bone measurements of periodontal intrabony defects. The aim of this study was to compare intrasurgical and CBCT‐based linear measurements of intrabony defects focusing on CBCT section thickness. Methods Sixty‐six intrabony defects were assessed in 21 patients with chronic generalized severe periodontitis. Linear measurements of alveolar bone (radiographic bone level [rBL]), assessed in CBCT images at diverse section thicknesses: 0.25 mm (voxel size), 1 mm, and 3 mm, were compared with clinical bone level (cBL) measurements obtained intrasurgically. To provide identical reference points for rBL and cBL measurements, individually adjusted grooves on the reference stent were prepared for each periodontal defect site. CBCT measurements were performed in two rounds by two trained observers. Observer agreement was assessed by intraclass correlation coefficients (ICC). ANOVA assessed the difference among cBL and rBL at different section thicknesses. Results Intra‐ and inter‐observer agreement was excellent (ICC >0.99) and highly significant independent of the observer, evaluation round, and CBCT section thickness. Mean rBL in the diverse CBCT section thicknesses was very close to that measured clinically (cBL). There was no statistically significant difference between cBL and rBL for any section thickness, neither for the overall evaluated sites, nor the maxilla or mandible separately. Conclusions No statistically significant difference between clinical and radiographic bone level for 0.25‐, 1‐, and 3‐mm CBCT section thicknesses were observed when assessing intrabony periodontal defects.