Method to Determine the Root Canal Anatomic Dimension by using a New Cone-Beam Computed Tomography Software

Abstract

This study discusses a method to determine the root canal anatomic dimension by using e-Vol DX software. The methodology consists in initially establishes the correct positions which will be measured, define the point on the edge of the anatomical structure, and next adjust the intermediate position in the grayscale of CBCT image. Afterward, thin sections (0.10 mm) are obtained from 3D reconstructed slices in the filter for the measurements, in order to determine the edge of the anatomical surface in the axial plane. A replication of positions in 3D mode is done in multiplanar reconstruction (MPR) of CBCT images, where the correct position is established with the aid of a positioning guide. The 3D density is adjusted so that it is in the same dimension as the 2D image, and a dimension calibration occurs to the point where there is a coincidence between 3D and 2D. This calibration is done only at the beginning of the measurement. Next, the intermediate position of the division between the grayscale is verified in the CBCT scan. Once one side has been completed, it is moved to the other side and follows the same guidelines described above. When setting the position of the courses in the other margin, being that 2D mode is used as reference. Thus, one obtains the required measure, being checked in the two points. The creation of this filter in the e-Vol DX software for measurement, and its appropriate management, allows more effective applications when it is desired to obtain diameters of anatomical structures.

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

“…Adjustments were made for parallax correction when necessary. A specific tool, used as a positioning guide and for the definition of edges and limits for measurements, was developed for micrometric measurements and applied using the e-Vol DX software, together with synchronization for color map analysis (17).…”

“…For measurements, post diameters on the CBCT scans, the markings were synchronized on the samples according to X-, Y-and Z-axes and, when necessary, CBCT scans were repositioned to correct parallax errors. The e-Vol DX software was used to measure the diameter of the posts on the CBCT scans included in this study (13,17). The exact points to be measured, such as the marking on the edge of the anatomic structures, were defined, and the intermediate grade of the grayscale was adjusted on the CBCT scan.…”

“…Thin, 0.10-mm slices were obtained from the 3D slices reconstructed using the filter for measurements, and the edge of the anatomic surface was defined on the axial plane. Positions in 3D mode were replicated in multiplanar CBCT image reconstruction, and the correct position was defined using a previously described positioning guide (17). After that, 3D density was adjusted to be on the same dimension as the 2D image.…”

Volume da câmara pulpar de molares superiores e incisivos inferiores em imagens de tomografia computadorizada de feixe cônico

“…As avaliações do volume das câmaras pulpares, no presente estudo, foram realizadas apenas por um avaliador, pois trata-se de imagens com dimensões muito pequenas, o que dificulta a Pesquisa VOLUME DA CÂMARA PULPAR DE MOLARES SUPERIORES E INCISIVOS INFERIORES repetição das medições, além de estabelecer variáveis de confusão (vieses) para delimitar corretamente o ponto de referência. Uma vez que a medição é repetida, dificilmente as referências serão delimitadas na posição correta 18 .…”

The impact of cone beam computed tomography in diagnosis and endodontic treatment planning decisions - case reports

“…Currently the new high resolution CBCT scanners and specific softwares have im-proved the quality of tridimensional images (Bueno et al, 2018;Bueno et al, 2019;Estrela et al, 2018). Thus it has allowed a more precise analysis of the root canal anatomy and surround-ing tissues, which can be decisive to the dentist negotiated better the complex cases in endodontics (Bueno et al, 2018;Estrela et al, 2018).…”