title: Dental hygiene: 70 years of growth and change taking a look at yesterday, today, and tomorrow.
mesh_terms: D003695:Delivery of Health Care / Q000639:trends; D003729:Dental Care / Q000639:trends; D003756:Dental Hygienists / Q000266:history; D049673:History, 20th Century; D006801:Humans; D007484:Iowa