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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of dental metallic artifact from multislice CT in the assessment of simulated mandibular lesions

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Author(s):
Perrella, Andreia [1] ; Lopes, Patricia M. L. [2] ; Rocha, Rodney G. [1] ; Fenyo-Pereira, Marlene [1] ; Cavalcanti, Marcelo G. P. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sch Dent, Dept Stomatol, Sao Paulo - Brazil
[2] Centro Univ Joao Pessoa, Joao Pessoa, Paraiba - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Applied Oral Science; v. 18, n. 2, p. 149-154, MAR-APR 2010.
Web of Science Citations: 14
Abstract

OBJECTIVE: This study evaluated the influence of metallic dental artifacts on the accuracy of simulated mandibular lesion detection by using multislice technology. MATERIAL AND METHODS: Fifteen macerated mandibles were used. Perforations were done simulating bone lesions and the mandibles were subjected to axial 16 rows multislice CT images using 0.5 mm of slice thickness with 0.3 mm interval of reconstruction. Metallic dental restorations were done and the mandibles were subjected again to CT in the same protocol. The images were analyzed to detect simulated lesions in the mandibles, verifying the loci number and if there was any cortical perforation exposing medullar bone. The analysis was performed by two independent examiners using e-film software. RESULTS: The samples without artifacts presented better results compared to the gold standard (dried mandible with perforations). In the samples without artifacts, all cortical perforation were identified and 46 loci were detected (of 51) in loci number analysis. Among the samples with artifacts, 12 lesions out of 14 were recognized regarding medullar invasion, and 40 out of 51 concerning loci number. The sensitivity in samples without artifacts was 90% and 100% regarding loci number and medullar invasion, respectively. In samples with artifacts, these values dropped to 78% and 86%, respectively. The presence of metallic restorations affected the sensitivity values of the method, but the difference was not significant (p>0.05). CONCLUSIONS: Although there were differences in the results of samples with and without artifacts, the presence of metallic restoration did not lead to misinterpretation of the final diagnosis. However, the validity of multislice CT imaging in this study was established for detection of simulated mandibular bone lesions. (AU)

FAPESP's process: 06/05250-1 - Validation and comparative analysis between multislice and cone bean computed tomography for identification of mandibular bone lesions with metallic dental artifact interference
Grantee:Marcelo de Gusmão Paraíso Cavalcanti
Support Opportunities: Regular Research Grants