Abstract
Objective: To compare the effect of tooth brushing on surface roughness of Resin-Modified Glass Ionomer Cement (RMGIC; GC Gold label 2LC Light Cured Universal Restorative) and Glass Hybrid (GH; GC EQUIA SYSTEM- EQUIA Forte™ Fil and EQUIA Forte™ Coat) restorative material at 1- and 3-months interval simulated by tooth brushing . Material and Methods: RMGIC and GH material specimens (20 each) were prepared according to manufacturer instructions in 10 mm × 2 mm dimensions using a mylar strip. A specially designed toothbrush simulator was used along with Oral B Pro 2 2000N powered toothbrush and Colgate Total dentifrice (Colgate-Palmolive India limited; Relative dentin abrasivity - RDA: 70 - Low abrasive) to perform brushing strokes. Specimens were subjected to surface roughness analysis before and after simulated tooth brushing at baseline, 1, and 3 months. Results: The intragroup comparison was done using repeated-measures ANOVA. Intergroup comparisons were done using an independent sample t-test and General Linear Model (ANCOVA). Surface roughness increased from baseline through 3 months in both RMGIC and GH groups. The mean surface roughness in RMGIC group was significantly higher than GH group at baseline 1 and 3-months, respectively (p<0.001, <0.001, and <0.001). Interaction between group and baseline surface roughness was not significant (p=0.466). The estimated marginal means were significantly higher in RMGIC than GH group (p=0.008) . Conclusion: The surface roughness of both RMGIC and GH restorative increased from baseline to 1 month and 3 months after the simulated toothbrushing protocol. GH exhibited significantly lower surface roughness than RMGIC at all the tested intervals.
Highlights
Cervical lesions are categorized as carious and non-carious lesions
Objective: To compare the effect of tooth brushing on surface roughness of Resin-Modified Glass Ionomer Cement (RMGIC; GC Gold label 2LC Light Cured Universal Restorative) and Glass Hybrid (GH; GC EQUIA SYSTEM- EQUIA ForteTM Fil and EQUIA ForteTM Coat) restorative material at 1- and 3-months interval simulated by tooth brushing
Surface roughness increased from baseline through 3 months in both RMGIC and GH groups
Summary
The development of cervical lesions has multifactorial etiology. Diet, and occlusal or masticatory load are a few factors that can act independently at different points on the same tooth and result in the initiation and progression of cervical lesions [1]. Adhesive materials like Resin-Modified Glass Ionomers (RMGIC) make a perfect choice for restoring cervical lesions. It has ion leachable glass, an organic monomer, an initiator system, and water-soluble polymeric acid. It has better setting qualities when compared with conventional glass ionomer cement, adequate working time, which can be minimized by light curing, and swift development of initial strength, resulting in the matrix with low susceptibility for moisture contamination. Studies have shown RMGIC to be a suitable and successful restorative material for class V lesions [2,3,4,5]
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