Potential of a New Cone-Beam CT Software for Blooming Artifact Reduction

Abstract

This study evaluated the dimensions of intraradicular posts using a new cone beam CT (CBCT) software, and verified the potential of blooming artifact reduction. Sixty-three single-rooted human teeth were shaped, obturated, prepared for intracanal post placement and distributed into three groups: G1: anatomically customized prefabricated glass fiber posts; G2: low-fusion alloy posts; G3: gold alloy posts. After post fabrication and luting with RelyX U200®, specimens were sectioned axially at 9 mm from the root apex, and markings were made on the root surfaces (X-, Y- and Z-axes). The dimensions of the original posts (control group) were measured using a digital micrometer. CBCT scans of the teeth were obtained using a PreXion 3D Elite® scanner. Posts were measured on CBCT scans using DICOM files and the e-Vol DX software. A specific filter, Blooming Artefact Reduction (BAR), was developed to analyze intracanal posts. Statistical data were evaluated using the Van de Waerden nonparametric analysis of variance and, after that, normalized data were analyzed using the Tukey test. The level of significance was set at α = 5%. The measures of the anatomical prefabricated, low-fusion alloy and gold alloy intracanal posts obtained using the e-Vol DX CBCT software and a micrometer were not significantly different (p>0.05). The use of the BAR filter of the e-Vol DX software application did not induce any dimensional differences on CBCT scans of intracanal posts when compared with measurements made with a micrometer on original posts. The use of the BAR filter eliminated blooming artifacts.

Evaluation in the danger zone of mandibular molars after root canal preparation using novel CBCT software

“…This software produces high-resolution images enabled by several features, including sub-millimetric voxel size; multiplanar dynamic image navigation; tools to change volume parameters, such as slice thickness and slice intervals; imaging filters for data correction; brightness and contrast manipulation; and 196-dpi capture screen resolution, with a 384-dpi option, in contrast to the 96-dpi resolution of similar applications. 25 Estrela et al 30 compared the sizes of intraradicular posts on CBCT, e-Vol DX software and digital micrometer images. The diameters measured using the software and the micrometer alternatives were not statistically different from each other.…”

“…Evaluation methods have changed along the years, in line with new anatomic studies conducted on the danger zone, and with the alternative use of several different instrument systems and preparation techniques. With the advent CBCT incorporated into the field of endodontics, and the development and application of new software, [25][26][27]30,34,35 the initial cementum-dentin thickness in the danger zone can be measured, and the findings may be used to improve planning, and the decision of the most appropriate size and taper of instruments to be used in specific clinical conditions. The in vitro method developed in the study may provide information not only on the loss of dentin structure in the thin walls of human teeth, but also on future in vivo applications.…”

In Vitro Quantitative Evaluation of Postprocessing Filter for Metal Artifact Reduction in Cone Beam Computed Tomography Images of Titanium and Zirconium Dioxide Implants

“…Some authors [ 22 – 24 ] have achieved positive results by employing postprocessing filters in order to minimize the presence of metal artifacts produced by obturation or intracanal posts in CBCT images.…”