M Ayşe Tayman1, Kıvanç Kamburoğlu2, Özlem Küçük3, Funda S Ö Ateş4, Meral Günhan1. 1. Department of Periodontology, Faculty of Dentistry, Ankara University, Ankara, Turkey. 2. Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey. dtkivo@yahoo.com. 3. Department of Nuclear Medicine, Faculty of Medicine, Ankara University, Ankara, Turkey. 4. Department of Biostatistics, School of Medicine, Ankara University, Ankara, Turkey.
Abstract
OBJECTIVES: To assess linear and volumetric measurement accuracy of periodontal defects (class 2 furcation, fenestration, dehiscence, and three-wall intrabony defect) by using CBCT and micro-CT images obtained at different voxel sizes. MATERIAL AND METHODS: We created 66 periodontal defects in human dry mandibles. Images of teeth with defects were taken by Planmeca Promox 3D Max (CBCT) at voxel sizes of 0.2 and 0.075 mm and super-argus PET/CT (micro-CT) at voxel sizes of 0.12 and 0.06 mm. All defects were then linearly (depth, width, and height) and volumetrically measured by 3D-DOCTOR software. Differences between voxels were assessed by Wilcoxon signed rank test. Bland-Altman limits of agreement and ICCs were calculated to assess agreement between the methods. Significance was set at p < 0.05. RESULTS: Volumes measured by micro-CT (0.12-0.06 mm) were higher than those of CBCT (0.2-0.075 mm) measurements regardless of the voxel size. ICC between micro CT and CBCT methods was found to be statistically significant for all types of defects in terms of volume (p < 0.001), height (p < 0.05), width (p < 0.001), and depth measurements (p < 0.001). CONCLUSION: CBCT provides useful information regarding linear and volumetric measurement of periodontal defects in vitro. CLINICAL RELEVANCE: Size and volume of periodontal defects may play an important role in the determination of the most appropriate treatment plan and disease prognosis along with outcome assessment.
OBJECTIVES: To assess linear and volumetric measurement accuracy of periodontal defects (class 2 furcation, fenestration, dehiscence, and three-wall intrabony defect) by using CBCT and micro-CT images obtained at different voxel sizes. MATERIAL AND METHODS: We created 66 periodontal defects in human dry mandibles. Images of teeth with defects were taken by Planmeca Promox 3D Max (CBCT) at voxel sizes of 0.2 and 0.075 mm and super-argus PET/CT (micro-CT) at voxel sizes of 0.12 and 0.06 mm. All defects were then linearly (depth, width, and height) and volumetrically measured by 3D-DOCTOR software. Differences between voxels were assessed by Wilcoxon signed rank test. Bland-Altman limits of agreement and ICCs were calculated to assess agreement between the methods. Significance was set at p < 0.05. RESULTS: Volumes measured by micro-CT (0.12-0.06 mm) were higher than those of CBCT (0.2-0.075 mm) measurements regardless of the voxel size. ICC between micro CT and CBCT methods was found to be statistically significant for all types of defects in terms of volume (p < 0.001), height (p < 0.05), width (p < 0.001), and depth measurements (p < 0.001). CONCLUSION: CBCT provides useful information regarding linear and volumetric measurement of periodontal defects in vitro. CLINICAL RELEVANCE: Size and volume of periodontal defects may play an important role in the determination of the most appropriate treatment plan and disease prognosis along with outcome assessment.
Entities:
Keywords:
Cone beam computed tomography; Micro-computed tomography; Periodontal bone defects; Volumetric and linear analysis; Voxel size
Authors: Olavo César Lyra Porto; Brunno Santos de Freitas Silva; Julio Almeida Silva; Cyntia Rodrigues de Araújo Estrela; Ana Helena Gonçalves de Alencar; Mike Dos Reis Bueno; Carlos Estrela Journal: J Appl Oral Sci Date: 2020-02-07 Impact factor: 2.698