Evaluation of trabecular bone microstructure of mandibular condyle in edentulous, unilateral edentulous and fully dentate patients using cone-beam computed tomography

Abstract Objective: To determine the ideal window level and width needed for cone beam computed three-dimensional (3D) reconstruction of the condyle. Materials and Methods: Linear dimensions were measured with a digital caliper to assess the anatomic truth for 50 dry human mandibular condyles. Condyles were scanned with the i-CAT cone beam computed tomography (CBCT) and 3D-models were reconstructed. Three linear three-dimensional measurements were made on each of the 50 condyles at 8 different Hounsfield unit (HU) windows. These measurements were compared with the anatomic truth. Volumetric measurements were also completed on all 50 condyles, at 23 different window levels, to define the volumetric distribution of bone mineral density (BMD) within the condyle. Results: Significant differences were found in two of the three linear measurement groups at and below the recommended viewing window for osseous structures. The most accurate measurements were made within the soft tissue range for HU window levels. Volumetric distribution measurements revealed that the condyles were mostly comprised of low-density bone, and that condyles exhibiting significant changes in linear measurements were shown to have higher percentages of low-density bone than those condyles with little change from the anatomic truth. Conclusions: CBCT assessment of the mandibular condyle, using the 3D reconstruction, is most accurate when accomplished at density levels below that recommended for osseous examination. However, utilizing lower window levels which extend into the soft tissue range, may compromise one's capacity to view the bony topography.

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Volumetric analysis of the mandibular condyle using cone beam computed tomography

European Journal of Radiology ◽

10.1016/j.ejrad.2011.04.070 ◽

2012 ◽

Vol 81 (8) ◽

pp. 1812-1816 ◽

Cited By ~ 25

Author(s):

Mehmet Bayram ◽

Saadettin Kayipmaz ◽

Ömer Said Sezgin ◽

Murat Küçük

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Mandibular Condyle ◽

Volumetric Analysis ◽

Cone Beam

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Alveolar bone trabeculae in patients with aggressive patients with aggressive periodontitis using cone beam computed tomography imaging

Padjadjaran Journal of Dentistry ◽

10.24198/pjd.vol24no2.26828 ◽

2012 ◽

Vol 24 (2) ◽

Author(s):

Shaliha Shaliha ◽

Ria Noerianingsih Firman ◽

Yanti Rusyanti

Keyword(s):

Computed Tomography ◽

Bone Density ◽

Trabecular Bone ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Aggressive Periodontitis ◽

Cone Beam ◽

Trabecular Bone Density ◽

Computed Tomography Imaging ◽

Tomography Imaging

Introduction: Periodontitis is an inflamatory process in supporting tissues of the teeth including the gingiva, cementum, periodontal ligament and alveolar bone. Perioditis ntitis begins with migration of junctional ephithelium toward the apical side and form a pocket on gingiva. Aggressive periodontitis is one of the classifications of periodontitis with characteristics of attacking teens to young adults in relatively fast can lead to severe alveolar bone loss and it is not comparable with local factors that there. Trabeculae are part of the alveolar bone covered by compact bone and cortical bone harder . On radiographs, trabeculae only seen as a radiolucent surrounded by a radiopaque. The purpose of this research was to know the description of alveolar trabecular bone in patients with aggressive periodontitis using Cone Beam Computed Tomography imaging. Methods: This study is descriptive on 72 samples of aggressive periodontitis alveolar travecular bon e by CBCT imaging, taken from 6 archival aggressive periodontitis patients as research subjects, obtained from secondary data in the Radiology Department of RSGM FKG UNPAD. Results: The results of this study from the 3D CBCT imaging of alveolar trabecular bone leading to further describe the more posterior a decline in trabecular bone density and decrease in patients with aggressive periodontitis. Conclusion: The 3D CBCT imaging of alveolar trabecular bone leading to further describe the more posterior a decline in trabecular bone density and decrease in patients with aggressive periodontitis.

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Assessment of Trabecular Bone During Dental Implant Planning using Cone-beam Computed Tomography with High-resolution Parameters

The Open Dentistry Journal ◽

10.2174/1874210602115010057 ◽

2021 ◽

Vol 15 (1) ◽

pp. 57-63

Author(s):

Lauren Bohner ◽

Pedro Tortamano ◽

Felix Gremse ◽

Israel Chilvarquer ◽

Johannes Kleinheinz ◽

...

Keyword(s):

Computed Tomography ◽

High Resolution ◽

Trabecular Bone ◽

Cone Beam Computed Tomography ◽

Volume Fraction ◽

Statistical Significance ◽

Cone Beam ◽

Bone Volume Fraction ◽

Voxel Size ◽

Trabecular Thickness

Background: Cone-Beam Computed Tomography (CBCT) with high-resolution parameters may provide an acceptable resolution for bone assessment. Objectives: The purpose of this study is to assess trabecular bone using two cone-beam computed tomography (CBCT) devices with high-resolution parameters in comparison to micro-computed tomography (µCT). Methods: Bone samples (n=8) were acquired from dry mandibles and scanned by two CBCT devices: 1) VV (Veraview R100, Morita; FOV 4x4, 75kV, 9mA, voxel size 0.125µm); and PR (Prexion 3D, Prexion; FOV 5x5, 90kV, 4mA, 37s, voxel size 108µm). Gold-standard images were acquired using µCT (SkyScan 1272; Bruker; 80kV, 125mA, voxel size 16µm). Morphometric parameters (BvTv- Bone Volume Fraction, BsBv- Trabecular specific surface, TbTh- Trabecular thickness and TbSp- Trabecular separation) were measured. Statistical analysis was performed within ANOVA, Spearman Correlation test and Bland-Altmann plots with a statistical significance level at p=0.05. Results: CBCT devices showed similar BvTv values in comparison to µCT. No statistical difference was found for BvTv parameters assessed by CBCT devices and µCT. BsBv values were underestimated by CBCT devices (p<0.01), whereas TbTh and TbSp values were overestimated by them (p<0.01). Positive correlations were found between VV and µCT measurements for BvTv (r2= 0.65, p=0.00), such as between PR and µCT measurements for TbSp (r2= 0.50, p=0.04). For BsBv measurements, PR was negatively correlated with µCT (r2= -0.643, p=0.01). Conclusion: The evaluated CBCT device was able to assess trabecular bone. However, bone parameters were under or overestimated in comparison to µCT.

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