IADR Abstract Archives
Effect of Mouthwashes on Solubility Behaviour of Different Luting Cements
Objectives: To determine the effect of mouthwashes on solubility behaviour and marginal discrepancy of different luting cements.
Methods: 105 specimens consisting of two discs (6 mm x 1 mm) made from yttria-stabilized zirconia (Y-TZP) (In-Ceram YZ, Vita Zahnfabrik, Germany) and a polylactic acid thermoplastic (Mindkits, New Zealand) were cemented with 3 different luting cements (GC Fuji I GIC, GC Fuji Plus RMGIC and G-CEM LinkAce resin) and stored in artificial saliva solution for a period of 2 weeks. Specimens were immersed into various mouthwashes (A: Colgate Neutrafluor 900, B: Colgate Savacol, C: Listerine Freshburst, D: Colgate Optic White, Artificial saliva: Biotene) for 5 minutes and mechanical abrasion component was applied using an electric toothbrush twice daily. The solubility of cements was calculated by measuring the difference in mass of the samples before and after the experiment over the total volume. The bonded interfaces were also evaluated using SEM analysis with 25 and 200 magnification.
Results: The statistical analysis showed there was statistically significant difference (p<0.05) in solubility values for the 3 cement groups in treatment C (Listerine Freshburst), treatment D (Colgate Optic White) and artificial saliva (Biotene). SEM analysis did not reveal apparent differences in surface irregularities between mouthwashes and artificial saliva.
Conclusions: Mouthwashes of different pH values did not seem to have any effect on the solubility behaviour of the luting cements compared to the artificial saliva. GIC was found to have the highest solubility (loss of mass) compared to RMGIC in treatment D and artificial saliva. All specimens demonstrated crack formation within the cement itself as well as loss of adhesion to Y-TZP and polylactic acid thermoplastic surfaces.
Methods: 105 specimens consisting of two discs (6 mm x 1 mm) made from yttria-stabilized zirconia (Y-TZP) (In-Ceram YZ, Vita Zahnfabrik, Germany) and a polylactic acid thermoplastic (Mindkits, New Zealand) were cemented with 3 different luting cements (GC Fuji I GIC, GC Fuji Plus RMGIC and G-CEM LinkAce resin) and stored in artificial saliva solution for a period of 2 weeks. Specimens were immersed into various mouthwashes (A: Colgate Neutrafluor 900, B: Colgate Savacol, C: Listerine Freshburst, D: Colgate Optic White, Artificial saliva: Biotene) for 5 minutes and mechanical abrasion component was applied using an electric toothbrush twice daily. The solubility of cements was calculated by measuring the difference in mass of the samples before and after the experiment over the total volume. The bonded interfaces were also evaluated using SEM analysis with 25 and 200 magnification.
Results: The statistical analysis showed there was statistically significant difference (p<0.05) in solubility values for the 3 cement groups in treatment C (Listerine Freshburst), treatment D (Colgate Optic White) and artificial saliva (Biotene). SEM analysis did not reveal apparent differences in surface irregularities between mouthwashes and artificial saliva.
Conclusions: Mouthwashes of different pH values did not seem to have any effect on the solubility behaviour of the luting cements compared to the artificial saliva. GIC was found to have the highest solubility (loss of mass) compared to RMGIC in treatment D and artificial saliva. All specimens demonstrated crack formation within the cement itself as well as loss of adhesion to Y-TZP and polylactic acid thermoplastic surfaces.
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