English term
Ukraine
careful, caring, and perfectionist
Native in: Russian 
, Ukrainian
Works in: English to Russian, Russian to English, Ukrainian to English, and 1 more.
ceramics are or is
Y-TZP ceramics are effective in dentistry where their use increases every year.
Y-TZP ceramics is effective in dentistry where their use increases every year.
Y-TZP ceramic is effective in dentistry where their use increases every year.
The case in point is a ceramic material rather than products made from it
Non-PRO (1): Lara Barnett
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Responses
Brazil
Brazilian lawyer - 40+ years in Brazil
Native in: English (Variants: Scottish, British, UK, Irish, US, Australian, Canadian, New Zealand) 
, Portuguese (Variants: Brazilian, Mozambican, Angolan, European/Portugal)
Works in: Portuguese to English, English to Portuguese, English, and 1 more.
ceramics are effective in dentistry
| agree |
B D Finch
: Yes, as it seems most likely that "ceramics" is used to refer to the class of materials, not just to a particular ceramic material.
20 mins
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Thanks, BD!
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| neutral |
Tony M
: As a class of products, I'd agree; but Asker has specifically explained that it involves one particular ceramic material from the manufacturer.
23 mins
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Thanks, Tony!
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| agree |
Filippe Vasconcellos de Freitas Guimarães
: "Y-TZP" stands for "yttria tetragonal zirconia polycrystal", a class of materials. Hence, "Y-TZP ceramics", as it is a range of products.
26 mins
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Thanks, F!
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| agree |
Charles Davis
36 mins
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Thanks, Charles!
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| agree |
eesegura
48 mins
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Thanks, eesegura!
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| agree |
Jack Doughty
59 mins
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Thanks, Jack!
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| agree |
Lara Barnett
3 hrs
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Thanks, Lara!
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| agree |
airmailrpl
: -
3 hrs
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Thanks, airmail!
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| agree |
David Moore (X)
: BDF has explained this excellently above
15 hrs
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Thanks, David!
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ceramic material
'Ceramics' an be either singular or plural
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Note added at 11 mins (2012-02-20 17:25:06 GMT)
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he word "ceramic" comes from the Greek word κεραμικός (keramikos), "of pottery" or "for pottery",[2] from κέραμος (keramos), "potter's clay, tile, pottery".[3] The earliest mention of the root "ceram-" is the Mycenaean Greek ke-ra-me-we, "workers of ceramics", written in Linear b syllabic script.[4] "Ceramic" may be used as an adjective describing a material, product or process; or as a singular noun, or, more commonly, as a plural noun, "ceramics".[5]
eski :))
ceramic is
However, if it were "ceramic items made from XYZ are...", that would be a different kettle of fish.
'ceramics' can only really be followed by the singular when it means 'the art / technology / discipline of ceramics': "Ceramics is a field that offers lots of opportunities for young people."
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Note added at 28 minutes (2012-02-20 17:42:44 GMT)
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But of course, "where their use increases every year" would need to be changed too — though to be honest, that sounds pretty awkward to me in the first place; is this a translation RU > EN, if so, I'd advise re-working that end bit.
Discussion
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.