Wettability of chlorhexidine treated non-carious and caries-affected dentine

Author(s)

Ricci, H. A. ^[1] ; Scheffel, D. L. S. ^[1] ; de Souza Costa, C. A. ^[2] ; dos Santos, F. J. ^[3] ; Jafelicci, Jr., M. ^[3] ; Hebling, J. ^[1]

Affiliation

^[1] UNESP Univ Estadual Paulista, Araraquara Sch Dent, Dept Orthodont & Pediat Dent, Sao Paulo - Brazil

^[2] UNESP Univ Estadual Paulista, Araraquara Sch Dent, Dept Physiol & Pathol, Araraquara, SP - Brazil

^[3] UNESP Univ Estadual Paulista, Chem Inst Araraquara, Dept Chem & Phys, Araraquara, SP - Brazil

• Document type: Journal article
• Source: AUSTRALIAN DENTAL JOURNAL; v. 59, n. 1, p. 37-42, MAR 2014.
• Web of Science Citations: 4

Abstract

BackgroundThe wettability of a surface is a prerequisite for adhesion and the type of dentine plays an important role in this property. This study evaluated the effect of different excipients of chlorhexidine (CHX)on sound and caries-affected dentine wettability. MethodsFlat dentine surfaces were prepared (n = 100) and artificial caries was induced in half of the sample. For each substrate, sound and caries-affected dentine, surfaces were assigned to five groups: (1) smear-covered dentine; (2) smear-free dentine saturated with water; (3) ethanol; (4) 1% CHX in water; or (5) 1% chlorhexidine in ethanol. The infected dentine was ground with 320-grit silicon carbide paper to the level of affected dentine. The smear layer was removed with acid, followed by rinsing, blot drying and the application of each solution (60seconds). Single Bond 2 was applied to each surface and contact angles were measured using a goniometer. Data were analysed by ANOVA and Student-Newman-Keuls ( = 0.05). ResultsContact angles were higher on sound dentine, regardless of the treatment. For sound and caries-affected dentine significantly higher angles were obtained on smear-covered dentine. Acid-etched dentine saturated with ethanol and ethanol/CHX resulted in significantly lower angles but only for sound dentine. Neither water and water/CHX nor ethanol and ethanol/CHX solutions differ with respect to dentine wettability. ConclusionsCaries-affected dentine wettability is higher than sound dentine, and chlorhexidine does not influence this property. (AU)

• FAPESP's process: 10/20495-6 - Effect of different solutions of chlorhexidine on the production and mechanical stability of resin-caries affected dentin bonds
• Grantee: Josimeri Hebling Costa
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/09802-4 - Effect of water- and ethanol-based chlorhexidine solutions on collagen exposure in sound and caries-affected dentin-resin bonds.
• Grantee: Matheus Racy Mariusso
• Support Opportunities: Scholarships in Brazil - Scientific Initiation