2012
DOI: 10.1590/s0103-64402012000400012
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Influence of thicknesses of smear layer on the transdentinal cytotoxicity and bond strength of a resin-modified glass-ionomer cement

Abstract: This study evaluated the transdentinal cytotoxicity (TC) and the bond strength (BS) of a resin-modified glass-ionomer cement (RMGIC) applied to dentin covered with smear layer (SL) of different thicknesses. Forty dentin discs had thick (TSL) or thin (THSL) smear layer created on their occlusal side. In artificial pulp chambers, MDPC-23 cells were seeded on the pulpal side of the dentin discs and divided into five groups: G1TC: no treatment (control); G2TC: TSL + RMGIC; G3TC: THSL + RMGIC; G4TC: TSL removal + R… Show more

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Cited by 6 publications
(5 citation statements)
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“…This finding implies that all or most of the dentin was covered by cement. The observation that the retentive strength of RMGIC did not deteriorate after the application of Pro-Relief Desensitizing Paste is in accordance with previous studies demonstrating that the maintenance or removal of the smear layer did not affect the bond strength of RMGIC to the dentin substrate [ 26 ]. The retentive ability of RMGIC was previously shown to be unaffected by another desensitizing agent, GC Tooth Mousse [ 27 ].…”
Section: Discussionsupporting
confidence: 90%
“…This finding implies that all or most of the dentin was covered by cement. The observation that the retentive strength of RMGIC did not deteriorate after the application of Pro-Relief Desensitizing Paste is in accordance with previous studies demonstrating that the maintenance or removal of the smear layer did not affect the bond strength of RMGIC to the dentin substrate [ 26 ]. The retentive ability of RMGIC was previously shown to be unaffected by another desensitizing agent, GC Tooth Mousse [ 27 ].…”
Section: Discussionsupporting
confidence: 90%
“…Recently, with the introduction of adhesive dentistry to endodontics, smear layer removal is indicated in combination with resin based sealers (10,11).…”
Section: Introductionmentioning
confidence: 99%
“…This modification improved the mechanical properties and resistance of GICs. The presence of uncured monomer, however, in RMGICs increased the concern about its biocompatibility with pulpal tissues [46] . Metal-reinforced GICs, as an example of powder modification, involve the addition of silver-amalgam alloy powder to conventional GICs powder; it increased the mechanical properties, reduced solubility, and induced radio-opacity to GICs.…”
Section: Introductionmentioning
confidence: 99%