Accuracy of linear measurements on CBCT images related to presurgical implant treatment planning: A systematic review

Abstract

Objective: The aim of this systematic review was to identify, review, analyze, and summarize available evidence on the accuracy of linear measurements when using maxillofacial cone beam computed tomography (CBCT) specifically in the field of implant dentistry. Material and methods:The search was undertaken in April 2017 in the National Library of Medicine database (Medline) through its online site (PubMed), followed by searches in the Cochrane, EMBASE, ScienceDirect, and ProQuest Dissertation and Thesis databases. The main inclusion criterion for studies was that linear CBCT measurements were performed for quantitative assessment (e.g., height, width) of the alveolar bone at edentulous sites or measuring distances from anatomical structures related to implant dentistry. The studies should compare these values to clinical data (humans) or ex vivo and/or experimental (animal) findings from a "gold standard." Results:The initial search yielded 2,516 titles. In total, 22 studies were included in the final analysis. Of those, two were clinical and 20 ex vivo investigations. The major findings of the review indicate that CBCT provides cross-sectional images that demonstrate high accuracy and reliability for bony linear measurements on crosssectional images related to implant treatment. A wide range of error has been reported when performing linear measurements on CBCT images, with both overand underestimation of dimensions in comparison with a gold standard. A voxel size of 0.3 to 0.4 mm is adequate to provide CBCT images of acceptable diagnostic quality for implant treatment planning.Conclusions: CBCT can be considered as an appropriate diagnostic tool for 3D preoperative planning. Nevertheless, a 2 mm safety margin to adjacent anatomic structures should be considered when using CBCT. In clinical practice, the measurement accuracy and reliability of linear measurements on CBCT images are most likely reduced through factors such as patient motion, metallic artefacts, device-specific exposure parameters, the software used, and manual vs. automated procedures. K E Y W O R D SCT imaging, diagnosis/clinical assessment, radiology/imaging This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

CBCT assessment of bone thickness in maxillary and mandibular teeth: an anatomic study

“…[14][15][16][17] However, the accuracy of reformatted CBCT images is affected by technical parameters that could depend on the CBCT system, such as nominal resolution, image quality, voxel size, kV, mA, number of basis images, field of view (FOV), and the algorithm of the software used in the acquisition and reconstruction of dimensional measurements. 12,18,19 Advanced CBCT systems with high spatial resolution, submillimeter voxel sizes, small FOV, and a smaller focal spot, are considered more accurate in regard to linear measurements. 18 Although some CBCT studies have been conducted to analyze bone thickness in maxillary and mandibular teeth, the information regarding bone thickness in the apical region have been under-represented.…”

“…12,18,19 Advanced CBCT systems with high spatial resolution, submillimeter voxel sizes, small FOV, and a smaller focal spot, are considered more accurate in regard to linear measurements. 18 Although some CBCT studies have been conducted to analyze bone thickness in maxillary and mandibular teeth, the information regarding bone thickness in the apical region have been under-represented.…”

Generative Noise Reduction in Dental Cone-Beam CT by a Selective Anatomy Analytic Iteration Reconstruction Algorithm

“…Three cases A, B, and C, defined as sparse 12 projections' input, and the n interp = 96, 144, and 168. The A, B, and C result sets are quoted at the first, middle, and last projections of each segment Ω i (i = [1,8], I ∈ N). The Ω i is defined in degrees of (0,45), (45,90), (90,135), .…”

Apical surgery: Effect of dimensions of root-end fillings and peripheral root dentine on healing outcome

“…To the best of our knowledge, this is the first radiographic study evaluating REF and PRD dimensions using CBCT. This 3D clinical imaging technique has been shown to provide reliable data with regard to object dimensions and linear measurements in comparison to the gold standard (8).…”