Aim: Evaluated (in vitro) the quantum of extrinsic discoloration when alkasite composite resin and micro-hybrid composite were subjected to Tea (camelia sinensis) for a specific period of time

Materials and Methods: A micro filled composite and alkasite material is used. Each material was randomly divided into group of 10 samples each according to the beverages used (tea). The samples were immersed in this beverage for 24hrs for 10 days. Color change was observed by spectrophotometer.

Statistical analysis used: Independent T test were used to find the difference in color change in the resin composites and alkasite material when immersed in Tea solution.

Results: To check the significance of the difference in OD values between two materials, the independent t test is used. Since the p value is less than 0.01, it is found that there is highly significant difference in optical density values between the two materials namely the Alkastite composite resin and Micro hybrid composite resin.