Impact of CBCT image quality on the confidence of furcation measurements

• Published in: Journal of clinical periodontology 2020-07, Vol.47 (7), p.816-824
• Main Authors: Rinne, Carin Aime, Dagassan‐Berndt, Dorothea C., Connert, Thomas, Müller‐Gerbl, Magdalena, Weiger, Roland, Walter, Clemens
• Format: Article
• Language: English
• Subjects: CBCT; Computed tomography; Cone-Beam Computed Tomography; Confidence; Dentistry; furcation; Furcation Defects - diagnostic imaging; Humans; imaging quality; Maxilla; Molar - diagnostic imaging; periodontal surgery; Spiral Cone-Beam Computed Tomography; Teeth
• ISSN: 0303-6979; 1600-051X
• DOI: 10.1111/jcpe.13298

Background To investigate the impact of scanning parameter in cone‐beam computed tomography (CBCT) images on accuracy and confidence with measurements of furcation involvement (FI) in maxillary molars. Material and methods Six half cadaver heads with present maxillary molars (n = 10) were available. CBCT scans with the fixed‐parameter field of view (4 × 4 cm, 12 × 17 cm) amperage and voltage (4 mA, 90 kV) and with varying scan modes (SM), that is images/scan (IS), voxel sizes (VZ) and rotation (R), were performed using one CBCT apparatus. The images were analysed by two calibrated investigators. Horizontal FI's were measured in mm or a “through and through” destruction (FI degree III) was recorded. Each rater scored the FI measurements performed in each scan as “confident” or as “not confident”. Data were statistically analysed using chi‐square tests. Results The agreement between CBCT FI measurements and intra‐surgical FI measurements varied according to SM (SM HiSp 180°, 0.08: kappa 0.538, CI; 95%: 0.362–0.714; SM Std. 360°, 0.25: kappa 0.698, CI; 95%: 0.534–0.861). The number of measurements scored as “confident” varied according to SM (SM Std. 360°, 0.08:52 out of 60 measurements; SM Std. 360°, 0.25:16 out of 60 measurements; p