International profiles of dental hygiene 1987 to 2006: a 21-nation comparative study.

Abstract

This international longitudinal study examines trends and changes in dental hygiene. Information was collected from national dental hygienists' associations through a series of five surveys conducted between 1987 and 2006; sample sizes increased from thirteen to twenty-five countries. As dental hygiene has evolved, it has remained remarkably consistent… (More)

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