Comparative evaluation of surface properties of enamel and different esthetic restorative materials under erosive and abrasive challenges: An in vitro study.

Indian J Dent · 2015 · PMC4691985 · PMID 26752876

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an increasing trendno p-value reported

They have apparently increased in the last few decades partly because of an increasing trend in the consumption of carbonated and citrus drinks and also because of the adult population retaining more natural teeth as they age.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.