Depends what is meant 17:43 Feb 20, 2012
If Y-TZP is a particular type of ceramic than it is singular: Y-TZP ceramic is effective in dentistry where its use increases every year.
If Y-TZP is a company making ceramics or a class of ceramics that includes a number of different products, then it is plural: Y-TZP ceramics are effective in dentistry where their use increases every year. In all events, your 3rd suggestion is wrong. Your 2nd one is also wrong except in the context suggested by Tony, which does not seem likely here. |