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Table 7 Occurrence of TMD (short-term)

From: Effect of protraction facemask on the temporomandibular joint: a systematic review

Author Outcome Short-term effect
Mandall (2010) TMJ signs and symptoms In PFM group, No patients had lateral TMJ pain, intra-articular pain, locking, loss of movement (maximum mouth opening, lateral movement), or temporalis/masseter spasm; 6/70 TMJs had Clicking; 2/70 TMJs had crepitus, 1/35 patients had lateral pterygoid spasm; In control group, 3/76 TMJs had lateral TMJ pain; no patients had intra-articular pain, locking, loss of movement (maximum mouth opening, lateral movement), or temporalis/masseter spasm; 1/76 TMJs had Clicking; 9/76 TMJs had crepitus; 2/38 patients had lateral pterygoid spasm in control group.
Kurt (2010) TMJ signs and symptoms In PFM group, 1/17 patients had myofascial pain; no patients had disc displacement; 3/17 patients had arthralgia; In control group, 1/13 patients had myofascial pain; no patients had disc displacement; 1/13 patients had arthralgia.
Ngan (1997) Masticatory muscle pain 4/20 TMJs with level 1 pain of superficial masseter; 2/20 TMJs with level 1 pain of posterior temporalis; 2/20 TMJs with level 1 pain of temporal tendon; 3/20 TMJs with level 1 pain of lateral pterygoid; One month after removal of the appliance, no patients have masticatory muscle pain.
Yao (2001) TMD 14/19 patients were TMD symptom freed; 5/19 patients were TMD symptoms relief.