In Vitro Effects of Resin Infiltration on Enamel Erosion Inhibition

Author(s)

Oliveira, G. C. ^[1] ; Boteon, A. P. ^[2] ; Ionta, F. Q. ^[1] ; Moretto, M. J. ^[1] ; Honorio, H. M. ^[1] ; Wang, L. ^[2] ; Rios, D. ^[1]

Affiliation

^[1] Univ Sao Paulo, Bauru Sch Dent, Pediat Dent Orthodont & Publ Hlth, Bauru, SP - Brazil

^[2] Univ Sao Paulo, Bauru Sch Dent, Operat Dent Endodont & Dent Mat, Bauru, SP - Brazil

• Document type: Journal article
• Source: Operative Dentistry; v. 40, n. 5, p. 492-502, SEP-OCT 2015.
• Web of Science Citations: 12

Abstract

Resin-based materials that show promising effects for preventing the progression of erosion have been studied. This in vitro study evaluated the effects of applying resin-based materials, including resin infiltration, on previously eroded enamel subjected to erosive challenges. The influence of enamel surface etching prior to application of the material was also studied. Bovine enamel blocks were immersed in hydrochloric acid (HCl), 0.01 M (pH 2.3), for 30 seconds in order to form a softened erosion lesion. The blocks were then randomly divided into nine groups (n=12) and treated as follows: C = control without treatment; Hel = pit \& fissure resin sealant (Helioseal Clear); Adh = two-step self-etching adhesive system (AdheSe); Tet = two-step conventional adhesive system (Tetric N-bond); and Inf = infiltrant (Icon). The Helno, Adhno, Tetno, and Infno groups received the same materials without (or with no) surface conditioning. The depth of the material's penetration into softened erosion lesions was qualitatively analyzed using reflection and fluorescence confocal microscopy. After application of the materials, the blocks were immersed in HCl for two minutes; this step was followed by immersion in artificial saliva for 120 minutes four times a day for five days (erosive cycling). Both the enamel alteration and material thickness were analyzed using profilometry, and the results were submitted to Kruskal-Wallis and Dunn tests (p > 0.05). Images from the confocal microscopy showed minimal penetration of Adh/Adhno and deep penetration of Inf/Infno into the erosive lesions. The groups Hel, Adh, Inf, Tetno, and Infno resulted in the formation of a layer of material over the enamel, which was effective in inhibiting the progression of erosion. In conclusion, the infiltrant, with or without etching, was able to penetrate and protect the enamel against dental erosion. The other resin-based materials, except for the two-step conventional adhesive, were able to penetrate and inhibit the progression of erosive lesions only when they were applied after enamel etching. (AU)

• FAPESP's process: 11/12395-4 - Effect of infiltrant application on initial erosion lesion subjected to erosive challenge: in vitro study
• Grantee: Ana Paula Boteon
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 11/16208-4 - Infiltrant application on sound enamel and with initial erosion lesion, subjjected to in vitro erosive challenge
• Grantee: Gabriela Cristina de Oliveira
• Support Opportunities: Scholarships in Brazil - Master