The Effect of Desensitizing Toothpastes and Coffee Staining on the Optical Properties of Natural Teeth and Microhybrid Resin Composites: An In-Vitro Study

Table 2

The study methodology.

1. Specimen preparation (n=8) (natural tooth/composite)	5. Second color measurements (L1, a1, b1)
2. Storage in artificial saliva (24 hr)	6. Evaluation of
3. Initial color measurements (L0, a0, b0)	7. Staining with coffee/ brushing each day
4. Simulated brushing	8. Final color measurements (L2, a2, b2)
	9. Evaluation of