Effect of intracanal posts on dimensions of cone beam computed tomography images of endodontically treated teeth

Carlos Estrela, Mike Reis Bueno, Julio Almeida Silva, Olavo César Lyra Porto, Claudio Rodrigues Leles, Bruno Correa Azevedo

Objectives: This study evaluated the effect caused by intracanal posts (ICP) on the dimensions of cone beam computed tomography (CBCT) images of endodontically treated teeth. Methods: Fourty-five human maxillary anterior teeth were divided into 5 groups: Glass-Fibre Post®, Carbon Fibre Root Canal®, Pre-fabricated Post – Metal Screws®, Silver Alloy Post® and Gold Alloy Post®. The root canals were prepared and filled; after that, the gutta-percha filling was removed, and the ICP space was prepared. The post cementation material was resin cement. CBCT scans were acquired, and the specimens were sectioned in axial, sagittal and coronal planes. The measures of ICP were obtained using different 3D planes and thicknesses to determine the discrepancy between the original ICP measurements and the CBCT scan measurements. Results: One-way analysis of variance, Tukey and Kruskall-Wallis tests were used for statistical analysis. The significance level was set at α = 5%. CBCT scan ICP measurements were from 7.7% to 100% different from corresponding actual dimensions. Conclusion: Gold alloy and silver alloy posts had greater variations (p>0.05) than glass fiber, carbon fiber and metal posts (p<0.05). Gold alloy and silver alloy post dimensions were greater on CBCT scans than on original specimens.

Keywords: Cone beam computed tomography. Artifact. Intracanal post. Post

How to cite: Estrela C, Bueno MR, Silva JA, Porto OCL, Leles CR, Azevedo BC. Effect of intracanal posts on dimensions of cone beam computed tomography images of endodontically treated teeth. Dental Press Endod. 2011 apr-june;1(1):28-36.

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