Related Clues:

• Driller's deg.
• ADA member
• Orthodontist, for one: Abbr.
• Filling maker: Abbr.
• Letters on a shingle
• Bridge builder, maybe: Abbr.
• Dentist's deg.
• Drilling expert? (Abbr.)
• One with drill skill: Abbr.
• License to drill?
• Shingle letters
• Crown maker: Abbr.
• Canine examiner's deg.
• Tooth pro's deg.
• Tooth dr.