Which outcome measure is most specific to temporomandibular disorders?

• A. Neck Disability Index
• B. Headache Impact Test
• C. Jaw Functional Limitation Scale
• D. Oswestry Disability Index

Answer: (C)

When evaluating temporomandibular disorders, use an outcome measure that directly captures jaw-related function. The Jaw Functional Limitation Scale is designed specifically for TMD and asks about how jaw problems affect daily activities such as opening the mouth, moving the jaw side-to-side or protruding, chewing, biting, and speaking. This focus on jaw movements and functions makes it the most specific and sensitive to changes in TMD.

The other measures target different regions or symptoms: the Neck Disability Index assesses neck function, the Headache Impact Test gauges how headaches affect daily life, and the Oswestry Disability Index measures back-related disability. While useful for those conditions, they don’t specifically reflect jaw function, so they’re less appropriate for isolating TMD-related outcomes.