Personalized Dentist Or Hygienist Funny Hippo Youth T-Shirt. Funny dental hygienist or dental assistant Youth T-Shirt - Vintage Hot Pink with hippopotamus and Floss Em quote. Also perfect for a dentist or dental office staff. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.