Abstract
Combinations of the symptoms and signs of mandibular pain dysfunction syndrome (MDS) provoked by movements of the mandible are complex and patients are treated as a homogeneous group. The process of prognostic stratification applied to an inception cohort of 169 MDS patients, separated groups of patients according to affected movements of the mandible associated with similar outcomes of treatment. Two staging systems for the dysfunction were derived and evaluated. Further analyses of more data might distinguish groups of patients with comparable prognoses enabling universal and valid comparisons of treatment of the dysfunction to be made.

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