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And the Committee heard from the American Association of Oral and Maxillofacial Surgeons

At the end of the NAM meeting, Dr. Gregory Ness, representing the American Association of Oral and Maxillofacial Surgeons (AAMOS) gave the following comments: “AAMOS welcomes the interest and support of the Academies, the NIH, NIDCR, FDA and The

What Allen Told the Committee

Allen Cowley addressed the second open-to-the-public meeting of the National Institute of Medicine's (NAM) Committee on Temporomandibular Disorders (TMD) held on March 28, 2019 in Washington, DC. No stranger to the world of TMD, Dr. Cowley is the hus

Some Thoughts on Depression

It is hardly surprising that the chronic pain and limitations in function that many long-time TMJ patients experience can be accompanied by a state of depression, a sense of exhaustion and hopelessness.

Upcoming NAM Public Webinars on TMD

The National Academy of Medicine's (NAM) Committee on Temporomandibular Disorders (TMD): From Research Discoveries to Clinical Treatment is hosting two public web conferences on Wednesday, June 19 and Wednesday, July 31.   Webinar 1: Pati

The NAM Committee Heard from Patients, Too

At the March 28, 2019 public meeting NAM committee members had a chance to hear from TMD patients who had submitted testimony for the record.

Swallowing Changes Related to Chronic Temporomandibular Disorders

  • Apr 26, 2019

Fassicollo, Carlos & Machado, Barbara & Garcia, Denny & de Felício, Cláudia Maria. (2018).  Swallowing changes related to chronic temporomandibular disorders. Clinical Oral Investigations. 10.1007/s00784-018-2760-z. 


Objectives: To investigate whether chronic temporomandibular disorder (TMD) patients showed any changes in swallowing compared to a control group. Moreover, it was examined whether swallowing variables and a valid clinic measure of orofacial myofunctional status were associated.

Material and methods: Twenty-three patients with chronic TMD, diagnosed with disc displacement with reduction (DDR) and pain, according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD), and 27 healthy volunteers (control group) were compared. Surface electromyography (EMG) of the temporalis, masseter, sternocleidomastoid, and suprahyoid muscles was performed during swallowing tasks of thin liquid (10 and 15 mL) and spontaneous saliva. Data were normalized.

Results: Compared to the control group, TMD patients showed a prolonged duration of swallowing for liquid and saliva and required a longer time to reach the activity peak and half the integral. While the overall mean value of the relative peaks was similar for the groups, the suprahyoid peak was significantly lower in the TMD group during swallowing of liquid. Moreover, TMD patients recruited the jaw elevator muscles proportionally more than controls. The orofacial myofunctional status was moderately correlated with EMG parameters.

Conclusion: Patients with chronic TMD showed temporal prolongation and changes in the relative activity of the muscles during the swallowing tasks.

Clinical relevance: The present results contribute additional evidence regarding the reorganization of muscle activity in patients with chronic TMD.

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