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J Am Dent Assoc, Vol 138, No 8, 1084-1091. © 2007 American Dental Association

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JADA Continuing Education

A controlled prospective study

Background. The Quebec Task Force on Whiplash-Associated Disorders urged for controlled, prognostic studies of symptoms after whiplash trauma. The authors conducted a study that met the design requirements to enhance knowledge about short-term and long-term temporomandibular joint (TMJ) pain, dysfunction or both induced by whiplash trauma.

Methods. The authors studied 60 consecutive patients who had neck symptoms after whiplash trauma and were seen at a hospital emergency department. They followed up 59 subjects one full year later. At the inceptive examination and at follow-up, each subject completed a self-administered questionnaire, followed by a comprehensive interview. Fifty-three frequency-matched control subjects followed the same protocol concurrently.

Results. The incidence of new symptoms of TMJ pain, dysfunction or both between the inceptive examination and follow-up was five times higher in subjects (34 percent) than in control subjects (7 percent). The frequency of TMJ pain increased significantly in female subjects, as did the frequency of TMJ symptoms that were reported to be the main complaint. At the follow-up, 20 percent of all subjects reported that TMJ symptoms were their main complaint.

Conclusions. Our results suggest that one in three people who are exposed to whiplash trauma is at risk of developing delayed TMJ symptoms that may require clinical management.

Clinical Implications. Awareness of a significant risk for delayed onset of TMJ symptoms after whiplash trauma is crucial for making adequate diagnoses, prognoses and medicolegal decisions.

Key Words: Prospective; temporomandibular joint; whiplash trauma; asymptomatic; pain; dysfunction

Abbreviations: MR: Magnetic resonance • TMJ: Temporomandibular joint • WAD: Whiplash-associated disorders

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