Revised Diagnostic Criteria of Temporomandibular Disorders (RDC/TMD) for Myofascial Pain

Features - both of the following:

(1) pain involving the face, jaw, temple, in front of or in the ear in the past month

(2) one of the following:

(2a) familiar pain produced by palpation of the temporalis muscle with 2-3 pounds of pressure

(2b) familiar pain in the temporalis or masseter muscles on unassisted mandibular opening

(2c) familiar pain in the temporalis or masseter muscles on assisted mandibular opening

Subtypes:

(1) myofascial pain with unassisted opening without pain >= 40 mm (interincisal opening plus vertical incisal overlap)

(2) myofascial pain with unassisted opening without pain < 40 mm ("limited opening")