In distinguishing dental pain from TMD, which finding favors dental pain?

• A. Joint noises during jaw movements
• B. Pain localized to a single tooth and percussion-sensitive
• C. Limited mouth opening
• D. Pain worse with wide jaw opening

Answer: (B)

The main idea is that dental-origin pain tends to be confined to one tooth and responds to percussion testing, whereas TMD-related pain involves the jaw joint or muscles. When pain is localized to a single tooth and percussion-sensitive, tapping the tooth reproduces or worsens the pain, pointing to pulpal or periapical pathology in that tooth. This is typical of dental pain, not TMJ disorders.

In contrast, signs more characteristic of TMD include noises in the jaw joint during movement, limited mouth opening from joint or muscle involvement, and pain that worsens with wide jaw opening. These features reflect joint or muscular dysfunction rather than tooth pathology. So a tooth-localized, percussion-sensitive pain strongly supports a dental source over TMD.