The term 'Dentist's Direction' can be broken down into three crossword solutions: FLOSS (5 letters), OPEN (4 letters), and RINSE (5 letters). Flossing is an important part of oral hygiene, as it helps to remove plaque and food particles from between teeth. Opening the mouth wide is necessary for a dentist to properly examine the teeth and gums. Rinsing with water or mouthwash helps to remove bacteria and debris from the mouth. Together, these three activities form the basis of a dentist's direction for proper oral care.