title: Radiographic analysis of root canal fillings: influence of two sealers on the perception of voids.
abstract: The aim of this ex vivo was to investigate if two radiopaque root canal sealers with different formulations would influence the radiographic perception of root canal fillings. The root canals of 48 extracted maxillary canines were prepared and randomly assigned to 3 groups of 16 specimens each. In each group, the root canals were filled by lateral condensation of gutta-percha and one of the tested sealers: Endométhasone, Sealer 26, or a non-radiopaque sealer. A through-and-through void was simulated in half of the specimens from each group (n=8). The buccolingual radiographic images obtained were randomly interpreted for voids existence by a radiologist and an endodontist. The differences in sensitivity and specificity between groups and examiners were compared using, respectively, Fisher's Exact and McNemar tests at 5% significance level. Both radiopaque sealers caused a significant decrease in sensitivity at the coronal part of fillings. The use of Endométhasone increased specificity values for both coronal and apical portions of the root canal fillings. In conclusion, the tested sealers influenced the radiographic perceptions of laterally condensed root canal fillings in a different way.
authors.affiliation: Department of Dentistry, Endodontics and Dental Materials, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil. aboda@usp.br
authors.forename: Augusto
authors.initials: A
authors.lastname: Bodanezi
authors.forename: Etiene de Andrade
authors.initials: Ede A
authors.lastname: Munhoz
authors.forename: Norberti
authors.initials: N
authors.lastname: Bernardineli
authors.forename: Ana Lúcia Alvares
authors.initials: AL
authors.lastname: Capelozza
authors.forename: Ivaldo Gomes
authors.initials: IG
authors.lastname: de Moraes
authors.forename: Clovis Monteiro
authors.initials: CM
authors.lastname: Bramante
mesh_terms: D001729:Bismuth / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D003481:Cuspid; D018772:Dental Marginal Adaptation / Q000592:standards*; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging*; D003907:Dexamethasone / Q000737:chemistry; D004338:Drug Combinations; D005557:Formaldehyde / Q000737:chemistry; D006801:Humans; D006854:Hydrocortisone / Q000737:chemistry; D008437:Maxilla; D015588:Observer Variation; D011861:Radiography, Dental / Q000592:standards*; D015203:Reproducibility of Results; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000592:standards*; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D013943:Thymol / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D004338:Drug Combinations; D012387:Root Canal Filling Materials; C080620:Sealer 26; C011244:corticosteroid methanetriol mixture; D005557:Formaldehyde; D013943:Thymol; D003907:Dexamethasone; D002126:Calcium Hydroxide; D001729:Bismuth; D006854:Hydrocortisone