|Title:||Analysis of the width of vertical root fracture in endodontically treated teeth by 2 micro-computed tomography systems||Authors:||Huang C.-C.
|Issue Date:||2014||Publisher:||Elsevier Inc.||Journal Volume:||40||Journal Issue:||5||Start page/Pages:||78-84||Source:||Journal of Endodontics||Abstract:||
Introduction Early detection of vertical root fracture (VRF) is important for clinical endodontic practice. The purpose of this study was to measure the fracture width (distance between 2 sides of the fracture) of VRF teeth in vitro by using 2 micro-computed tomography (μ-CT) systems with different spatial resolution and voxel size. Methods Thirty-seven endodontically treated teeth with VRF were scanned by 80-μm pixel size μ-CT. Fifteen teeth with no obvious fracture line, blurred image, or fracture space less than 100 μm were scanned by 9-μm pixel size μ-CT. Results Presence of 2 VRF lines was more common in premolars (82%) than in molars (53%). In 7 premolars (32%) and 9 molars (60%), the VRF lines extended to within the apical 3 mm of the root. All fracture lines were detected by 9-μm pixel size μ-CT, but only 22 of 37 VRF teeth had vertical fracture identified by 80-μm μ-CT. From μ-CT examination, none of the fracture lines showed consistent and uniform fracture space. If 2 fracture lines were present, they were typically in opposite (not linear) directions. There was a significant correlation between 2 fracture lines or fracture lines extending within the 3 mm of the apex and fracture width greater than 100 μm. Conclusions Application of 9-μm μ-CT can be accurately used for early detection of VRF. Fracture characteristics (eg, number of fracture lines, extension of fracture line) may affect the fracture width. Appropriate use of μ-CT technology can be helpful for early diagnosis of VRF.? 2014 American Association of Endodontists.
|ISSN:||0099-2399||DOI:||10.1016/j.joen.2013.12.015||metadata.dc.subject.other:||early diagnosis; human; image processing; injuries; micro-computed tomography; molar tooth; premolar tooth; procedures; radiography; tooth apex; tooth fracture; tooth pulp disease; tooth root; Bicuspid; Early Diagnosis; Humans; Image Processing, Computer-Assisted; Molar; Tooth Apex; Tooth Fractures; Tooth Root; Tooth, Nonvital; X-Ray Microtomography
|Appears in Collections:||臨床牙醫學研究所|
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