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Root canal obturation materials and filling techniques for primary teeth: In vitro evaluation in polymer-based
Amanda Carneiro Aragão1, Andréa Vaz Braga Pintor1, Marília Marceliano-Alves2
1Department of Pediatric Dentistry and Orthodontics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Background:
Achieving a void-free root canal filling is a challenge in current clinical pulpectomy practice.
Aim:
To compare filling effectiveness and internal voids of root filling materials and obturation techniques in resin-prototyped primary incisors by micro-CT.
Design:
Fifty prototypes were instrumented and randomly divided (n = 10) according to the filling materials (Vitapex® , ZOE, Calcicur® , Feapex, and Calen® -ZO) and obturation technique: lentulo or pressure syringe (n = 5). The specimens were micro-CT scanned (pixel size = 7.83 μm) and reconstructed, and the total volume of filled canal (%FC) and internal voids (%IV) of the bulk filling material was calculated. Kruskal-Wallis and Mann-Whitney tests were used to detect differences and interactions among groups.
Results:
Calen® -ZO, Vitapex® , and ZOE showed similar %FC. Calcicur® showed lower %FC compared with Calen® -ZO, Vitapex® , and ZOE (P < .05) but similar to Feapex. No statistically significant differences in %FC between lentulo or pressure syringe were disclosed. Regarding %IV, Vitapex® , and Calen® -ZO performed better with syringe, although Calcicur® was better with lentulo. The number of voids in the obturation bulk was similar among materials, but always lower (P < .05) in syringe filled specimens.
Conclusion:
Vitapex® , Calen® -ZO, and ZOE outperformed Calcicur® and Feapex in %FC and if the syringe technique is used, %IV of the obturation bulk and presence of defects was lower.
