Beat one's ___ (jabber), 4 letters
Bites ineffectually, 4 letters
Chews without teeth, 4 letters
Fouls (up the works), 4 letters
Periodonist's concern, 4 letters
Periodontist's focus, 4 letters
What gingivitis affects, 4 letters
Sam Spade, e.g., slangily, 7 letters
(informal) someone who is a detective, 7 letters
A waterproof overshoe that protects shoes from water or snow, 7 letters
Ruins, as the works, 6 letters
(especially boxing) equipment that protects an athlete's mouth, 9 letters