Effect of root canal filling materials on dimensions of cone-beam computed tomography images.
OBJECTIVE
To evaluate the discrepancy of root canal filling (RCF) measurements obtained from original root specimens and cone-beam computed tomography (CBCT) images.


METHODS
Seventy-two human maxillary anterior teeth were prepared up to an ISO #50 K-File 1 mm short of the apical foramen. Thus, the teeth were randomly divided into 8 groups, according to the root canal filling material: Sealapex®, Sealapex®+gutta-percha points, Sealer 26®, Sealer 26®+gutta-percha points, AH PlusTM, AH PlusTM+gutta-percha points, Grossman Sealer, and Grossman Sealer+gutta-percha points. After root canal preparation and RCF, CBCT scans were acquired and the specimens were sectioned in axial, sagittal and coronal planes. The RCF measurements were obtained in different planes and thicknesses to determine the discrepancy between the original root specimens (using a digital caliper) and the CBCT images (using the scanner's proprietary software). One-way analysis of variance and Tukey tests were used for statistical analyses. The significance level was set at α=5%.


RESULTS
Measurements of the different endodontic filling materials were 9% to 100% greater on the CBCT images than on the original root specimens. Greater RCF dimensions were found when only sealers were used, with statistically significant difference among the groups.


CONCLUSIONS
RCF dimensions were greater on CBCT images than on the original root specimens, especially when only sealer was used.
Department of Oral Science, Federal University of Goiás, Goiânia, GO, Brazil.
Daniel Almeida
DA
Decurcio
Mike Reis
MR
Bueno
Ana Helena Gonçalves
AH
de Alencar
Olavo César Lyra
OC
Porto
Bruno Correa
BC
Azevedo
Carlos
C
Estrela
D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D054893:Cone-Beam Computed Tomography; D004853:Epoxy Resins / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D011897:Random Allocation; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation; D012459:Salicylates / Q000737:chemistry; D014092:Tooth Root / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012459:Salicylates; C080620:Sealer 26; D015035:Zinc Oxide-Eugenol Cement; C534916:epoxy resin-based root canal sealer; C045432:Grossman's sealer; C055601:Sealapex; D006171:Gutta-Percha; D002126:Calcium Hydroxide; D001729:Bismuth