Effect of anatomical region on the formation of metal artifacts produced by dental implants in cone beam computed tomographic images.
Dentomaxillofac Radiol. 2017 Dec 12;:20170281
Authors: Machado AH, Castilho Fardim KA, de Souza CF, Sotto-Maior BS, Picorelli Assis NMS, Devito KL
Abstract
OBJECTIVES: To quantitatively compare metal artifacts produced by implants in different maxillomandibular regions on cone beam computed tomography (CBCT) images.
METHODS: A total of 200 implants selected from CBCT examinations were divided into four groups: Group 1 (n = 50) - implants located in the anterior maxilla; Group 2 (n = 50) - implants located in the posterior maxilla; Group 3 (n = 50) - implants located in the anterior mandible; and Group 4 (n = 50) - implants located in the posterior mandible. The implants were further classified as isolated or adjacent to other implants. Three axial reconstructions were selected for each sampled implant (apical, middle and cervical). On each slice, the artifacts produced by the implants were counted. The Mann-Whitney U test was used to compare the variables between groups. The Kruskal-Wallis and Student-Newman-Keuls tests were used to compare the axial reconstructions.
RESULTS: The mandible showed a greater number of artifacts than the maxilla (apical image: p = 0.0024; middle image: p < 0.0001). The anterior region produced more artifacts than the posterior region (apical image: p = 0.0105; middle image: p < 0.0316). There was no significant difference in the number of artifacts between isolated and adjacent implants, and the cervical image was most affected by artifacts.
CONCLUSIONS: Dental implants always produce metal artifacts in CBCT images, and these artifacts are affected by the anatomical location in the dental arch.
PMID: 29231055 [PubMed - as supplied by publisher]
from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/2BfSaNv
via IFTTT
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου