Tooth wear: a cross-sectional investigation of the prevalence and risk factors in Beijing, China.

BDJ Open · 2017 · PMC5842827 · PMID 29607073

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an increasing trendno p-value reported

Moreover, canines and premolars showed an increasing trend in tooth wear with 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.