Related Clues:

• Ted isn't wrong - he sets most people's teeth on edge!
• In part, student is talented as a medical person
• Tooth surgeon
• One with responsibility for bridge incident is testing spans
• Traps repairer?
• One with a job to fill?
• Cavity is treated initially by a health professional
• One looks down in the mouth when at work
• He spots cavities
• Canine doctor?
• X-ray examiner, perhaps
• Driller dies — TNT exploding
• One filling small cavities over time?
• One filling hollow first?
• One might deal with canine depression -- it's barking