Comparative analysis of oral disorder burden in China and globally from 1990 to 2021 based on GBD data.

For YLDs rates, the age group of 70–74 years old was special, showing an increasing trend from 1990 to 2010, while the trends of other age groups followed a pattern similar to prevalence (Fig. 4 ).

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The age groups of 75 years old and above generally showed a trend of first increasing and then decreasing, with the three age groups of 75–89 years old reaching their peak in 2005.

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