Influence of eugenol-based materials and cleaning procedures previously to resin composite restoration on microleakage after 1-year storage

• Published in: Applied adhesion science 2016-07, Vol.4 (1), p.1-9, Article 15
• Main Authors: Lopes, Murilo Baena, Felizardo, Klissia Romero, Kaneshima, Renan Hideki, Guiraldo, Sandrine Berger, Guiraldo, Ricardo Danil, Gonini Júnior, Alcides
• Format: Article
• Language: English
• Subjects: 3rd Luso-Brazilian conference on adhesion and adhesives; Adhesion; Analysis of variance; Biomaterials; Chemistry and Materials Science; Chlorhexidine; Cleansing; Materials Science; Mechanical Engineering; Polymers; Resins; Restoration; Sealers; Surfaces and Interfaces; Thin Films
• ISSN: 2196-4351; 2196-4351
• DOI: 10.1186/s40563-016-0072-6

The interference of eugenol on the adhesive systems and composite polymerization could promote a higher marginal microleakage. This could be reduced by mechanical and chemical cleansing. The objective of this study was to evaluate the influence of the previous use of eugenol-based materials to a permanent restoration on the marginal microleakage. The influence of mechanical cleansing associated with chemical cleansing with chlorhexidine gel was also evaluated. Non-eugenol endodontic sealer and temporary material and mechanical cleansing was used as a control. Eighty bovine incisors were endodontic treated and divided into eight groups (n = 10) according to the sealer, temporary material and removal method. The specimens were temporarily restored and stored for 1 week at 37 °C and 100 % relative humidity, followed by definitive restoration and one-year storage at the same environment. The teeth were then sealed, immersed in silver nitrate at 50 % for 2 h and sectioned to have the microleakage qualitatively and quantitatively visually analyzed under a stereomicroscope at 45×. The percentage data were submitted to an ANOVA and Tukey’s test, and the scores were submitted to a Kruskal–Wallis and Dunn’s test at 5 % of the significance level. There was no difference between the groups when mechanical removal was made (p > 0.05). When chlorhexidine was used, the group that used endodontic eugenol based material as a sealer and the resin-based material as a temporary restoration showed less microleakage than the other (p