Eur Endod J. 2017; 2(1): 14 | DOI: 10.5152/eej.2017.16032

Influence of the Calcium Hydroxide Intracanal Dressing on Dentinal Tubule Penetration of Two Root Canal Sealers

Alessandra Timponi Goes Cruz¹, Fabiana Soares Grecca², Lucila Piasecki³, Caroline Wichnieski¹, Vânia Portela Dietzel Westphalen¹, Everdan Carneiro¹, Luiz Fernando Fariniuk¹, Ulisses Xavier Da Silva Neto^1
1Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, Brazil
²Department of Endodontics, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
³Department of Periodontics and Endodontics, University of Buffalo, New York, USA

Objective: The aim of this study was to evaluate the effect of a calcium hydroxide (CH) dressing on the tu- bular penetration of two endodontic sealers, AH Plus (Dentsply Maillefer, Ballaigues, Switzerland) and MTA Fillapex (Angelus, Londrina, Brazil).
Methods: Seventy-two mandibular premolars with a single root canal were prepared with ProFile.04 rotary instruments (Dentsply Maillefer) and divided into four groups. In two groups, an intracanal CH dressing was placed for 15 days. The obturations were performed with lateral condensation of gutta-percha in combina- tion with one of the tested sealers. The roots were transversely sectioned at the apical and middle levels. The percentage of sealer penetration in the root canal walls and the percentage of impregnated dentin area in the transverse sections were obtained using confocal laser scanning microscopy. Statistical analysis was performed using one-way analysis of variance (ANOVA) and Games-Howell test.
Results: The CH dressing reduced the mean value of tubular penetration in the middle third of teeth obturat- ed with AH Plus (P<0.01), whereas no difference was observed at the apical sections for both sealers. Conclusion: The CH dressing did not interfere with the apical penetration of both tested sealers, however, decreased the tubular penetration in the middle third of the AH Plus root canal fillings. Overall, MTA Fillapex presented higher tubular penetration than AH Plus obturations.

Keywords: Calcium hydroxide, canal medicaton, confocal laser scanning microscopy, epoxy resin-based root canal sealer, mineraltrioxide aggregate-based sealer, obturation

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