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What are the missing letters? . .?.lginate . .?.ilicone . .?.ycal Hint: A dentist can guess them easily.?

The number of the missing letters for each of the three words is three. And these words should be easy for a dentist to guess. That's all the hint I know. I have tried searching some words to resolve this from an online medical dictionary, but I failed to find the words that match with the spelling. Could you please help. Many thanks.

Public Comments

1. alginate is the right word i m a dentist but i think u r trying to enter a dental surgeons:e-mail list or something like that , so i will not like to answer the rest of two Thanks & Regards Dr Thind www.thind.com
2. Alginate, Silicone, Dycal