1) Ada members 2) Canine doctors 3) Canine specialists 4) Cap and crown men 5) Certain drillers 6) Crown makers 7) Drill masters 8) Drillers and fillers 9) Enamel restorers 10) Mouth guards 11) Numbers, at times 12) Professional men 13) They drill and fill 14) They give oral exams 15) They know the drill Found on https://www.crosswordclues.com/clue/dentists