Marzaban N.N., Nawwar A.A. And Zayet M.K.,

ABSTRACT
Objective: To Assess The Sensitivity, Specificity And Diagnostic Accuracy Of Cone Beam Computed Tomography (CBCT) Scans With Three Different Voxel Sizes In The Detection Of Vertical Root Fracture In Endodontically Treated Teeth Restored With Glass Fiber Post. Methodology: Seventy Six Extracted Single Rooted Teeth Were Used After Root Canal Treatment And Fiber Post Cementation For All Of Them. Vertical Root Fracture Was Induced In Thirty Eight Teeth Of The Sample. All The Sampled Teeth Were Imaged By CBCT With Voxel Sizes: 0.15, 0.2 And 0.4 Mm. Three Oral Radiology Specialists Examined The Scans.

Results: The Voxel Sizes 0.15 And 0.2 Mm Recorded 100% Sensitivity Value, While 0.4mm Had The Lowest Sensitivity (92.1%). Voxel Size 0.4 Mm Had Statistically Significantly Higher Specificity Than The Voxel Sizes: 0.15 And 0.2 Mm. No Statistical Significant Difference In Specificity Or Diagnostic Accuracy Between The Voxel Sizes: 0.15 And 0.2 Mm. While, 0.4 Mm Had Statistically Significantly Lower Diagnostic Accuracy (96.1%) Than The Other Voxel Sizes. Very Good Inter-observers? Agreement For Voxel Sizes 0.15 And 0.2 Mm Were Obtained. The Lowest Inter-observers? Agreement Was That For Voxel Size 0.4 Mm. Conclusion: For Detection Of Vertical Root Fractures In Endodontically Treated Teeth Restored With Fiber Posts, The Voxel Sizes 0.15 And 0.2 Mm Provide The Highest Diagnostic Accuracy With Optimum Spatial Resolution And Reasonable Radiation Doses.