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Restorative
Purpose: This study evaluated SDF and coffee stains removal methods from different restorative materials.
Methods: Seventy specimens were fabricated from each RC, GI, and RMGI and randomly allocated into groups of 10 each according to the experimental and control. Baseline color measurements were recorded using spectrophotometer. Specimens then immersed in the staining solution (Coffee or SDF) or distilled water (control). Stained specimens were randomly into three groups according to the stain removal method applied 40% hydrogen peroxide (HP), 20% carbamide peroxide (CP), potassium iodide (KI). Then colorimetric measurements were repeated.
Results: Delta E showed that KI was effective in removing SDF stains from RC (Mean + SE) 7.533 + 0.616 and GIC 11.680 + 0.839 while 40% HP 6.664 + 0.708 was more effective in RMGIC. HP was effective in removing coffee stains from RC 2.878 + 0.380 and GIC 6.480 + 0.620 while CP 5.419 + 0.366 was more effective in RMGIC. There was significant difference for RC and GIC stains removal materials in SDF (P=.001) and coffee (P=.0001) respectively as well as RMGI in SDF and coffee (P=.0001). HP and CP significantly increased SDF stains and CP significantly increased coffee stains of RC. KI significantly increased coffee stains of the RMGI. HP significantly increased SDF stains and KI significantly increased coffee stains of the GIC.
Conclusion: KI was effective in removing SDF stains from RC and GIC while HP was more effective in RMGIC. HP was significantly better in terms of removing the coffee stains from RC.