Eroded dentin does not jeopardize the bond strength of adhesive restorative materials

Cruz, J.B., Lenzi, T.L., Tedesco, T.K., Guglielmi, C.A.B. and Raggio, D.P. ORCID: https://orcid.org/0000-0002-0048-2068 2012. Eroded dentin does not jeopardize the bond strength of adhesive restorative materials. Brazilian Oral Research 26 (4) , pp. 306-312. 10.1590/S1806-83242012005000009

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Abstract

This in vitro study evaluated the bond strength of adhesive restorative materials to sound and eroded dentin. Thirty-six bovine incisors were embedded in acrylic resin and ground to obtain flat buccal dentin surfaces. Specimens were randomly allocated in 2 groups: sound dentin (immersion in artificial saliva) and eroded dentin (pH cycling model - 3× / cola drink for 7 days). Specimens were then reassigned according to restorative material: glass ionomer cement (KetacTM Molar Easy Mix), resin-modified glass ionomer cement (VitremerTM) or adhesive system with resin composite (Adper Single Bond 2 + Filtek Z250). Polyethylene tubes with an internal diameter of 0.76 mm were placed over the dentin and filled with the material. The microshear bond test was performed after 24 h of water storage at 37ºC. The failure mode was evaluated using a stereomicroscope (400×). Bond strength data were analyzed with two-way ANOVA and Tukey's post hoc tests (α = 0.05). Eroded dentin showed bond strength values similar to those for sound dentin for all materials. The adhesive system showed the highest bond strength values, regardless of the substrate (p < 0.0001). For all groups, the adhesive/mixed failure prevailed. In conclusion, adhesive materials may be used in eroded dentin without jeopardizing the bonding quality. It is preferable to use an etch-and-rinse adhesive system because it shows the highest bond strength values compared with the glass ionomer cements tested.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Dentistry
Date of First Compliant Deposit:	24 June 2022
Last Modified:	14 May 2023 20:16
URI:	https://orca.cardiff.ac.uk/id/eprint/148814

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