What is Jaw Joint and Muscle Sprain/Strain (JAMSS)?
Jaw Joint and Muscle Sprain/Strain (JAMSS) is the diagnostic term that describes an acute trauma to the jaw joint or muscles. JAMSS is characterized by sudden onset acute jaw pain, limited range of motion, tenderness or dysfunction. It is defined as a localized, acute musculoskeletal disorder caused by traumatic or mechanical injury or both. Sudden onset acute pain associated with JAMSS refers to a patient with no prior history of jaw pain or treatment for dysfunction. It is common for both muscle strain and joint sprain to coexist; therefore, it is not essential to differentiate for initial treatment of JAMSS.