Effect of anatomical region on the formation of metal artefacts produced by dental implants in cone beam computed tomographic images.

Autor: Machado AH; 1 Master's Program in Dental Clinic, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil., Fardim KAC; 1 Master's Program in Dental Clinic, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil., de Souza CF; 1 Master's Program in Dental Clinic, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil., Sotto-Maior BS; 2 Department of Restorative Dentistry, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil., Assis NMSP; 3 Department of Dental Clinic, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil., Devito KL; 3 Department of Dental Clinic, School of Dentistry, Federal University of Juiz de Fora , Juiz de Fora, Minas Gerais , Brazil.
Jazyk: angličtina
Zdroj: Dento maxillo facial radiology [Dentomaxillofac Radiol] 2018 Feb; Vol. 47 (3), pp. 20170281. Date of Electronic Publication: 2018 Jan 10.
DOI: 10.1259/dmfr.20170281
Abstrakt: Objectives: To quantitatively compare metal artefacts produced by implants in different maxillomandibular regions on cone beam CT (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 artefacts produced by the implants were counted. The Mann-Whitney 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 artefacts than the maxilla (apical image: p = 0.0024; middle image: p < 0.0001). The anterior region produced more artefacts than the posterior region (apical image: p = 0.0105; middle image: p < 0.0316). There was no significant difference in the number of artefacts between isolated and adjacent implants, and the cervical image was most affected by artefacts.
Conclusions: Dental implants always produce metal artefacts in CBCT images, and these artefacts are affected by the anatomical location in the dental arch.
Databáze: MEDLINE
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