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Wear Face Masks with No Metal During MRI Exams: FDA Safety Communication

The FDA recently received a report that a patient’s face was burned from the metal in a face mask worn during an MRI. The FDA reminds patients and providers that patients should not wear any metal during an MRI. TOPIC: Wear Face Masks with No Metal During MRI Exams: FDA Safety Communication  

A Tribute to William “Bill” Maixner, Ph.D., D.D.S

All of us at The TMJ Association are deeply saddened by the loss of a treasured friend, an accomplished and highly respected scientist, empathic clinician and one of temporomandibular disorder's (TMJ) greatest champions – Dr. William “Bill” Maixner. Bill passed away on Monday, November 2, 2020, at the age of 68.

New Report on Temporomandibular Disorders: Priorities for Research and Care

Over a year and half ago, the National Academy of Medicine (NAM) began the most comprehensive study ever undertaken on Temporomandibular Disorders (TMD). The study assessed the current state of TMD research, education and training, the safety and efficacy of clinical treatments, and associated burden and costs.

Statement by NIDCR Acting Director on the National Academies of Sciences, Engineering, and Medicine Report on Temporomandibular Joint Disorders

I am pleased to announce the release of the National Academies of Sciences, Engineering, and Medicine (NASEM) report, Temporomandibular Disorders: Priorities for Research and Care. As underscored by the comprehensive report, temporomandibular joint disorders (TMJDs) are a diverse and still poorly understood set of complex, painful conditions affecting the jaw muscles and tissues, temporomandibular joints, and associated nerves. Clearly, there is much more to be understood, and these conditions continue to confound medical and dental health care providers and researchers.

Have you seen the film Dark Waters?

The Film. Dark Waters is about attorney Robert Billott's real-life 20 year legal battle against DuPont chemical for releasing toxic waste - perfluorooctanoic acid, or PFOA - into Parkersburg, West Virginia's water supply, with devastating health effects on the townspeople and livestock. PFOA, also known as C8, is a man-made chemical. It is used in the process of making Teflon and similar chemicals known as fluorotelomers.

TMD and Tooth-Grinding: A Surprising Finding

  • Dec 25, 2013

Over the decade researchers studying Temporomandibular Disorders (TMD) have concluded that these conditions are complex in origin. Some combination of genetic, sex, environmental and behavioral factors gives rise to symptoms of jaw pain and dysfunction. But that conclusion contradicts the long held beliefs by many patients and dentists who think that jaw problems are caused by tooth-grinding (bruxism) during sleep. The presumption behind this is that the activity of jaw muscles would stress the muscles and wear on the jaw joint? Wrong!

A definitive study conducted by researchers at New York University (NYU) College of Dentistry, Weill Cornell Medical College, New York and the University of Montreal led by NYU investigator Karen Raphael refutes the idea that bruxism causes TMD.

To begin with, the team noted that the bruxism theory was largely based on patients’ believing that they bruxed in their sleep (often reinforced by dentists telling them so).  For that reason the researchers designed a study using polysomnographic recordings (PSG) of patients and controls in the setting of a sleep laboratory. PSG recordings include audio and video data along with measures of jaw muscle activity to determine how many episodes of sleep bruxism (SB) occur during the night, distinguishing them from other muscle activity such as yawning, talking or chewing. Over two consecutive nights they compared TMD patients with matched controls. Wanting to get the best data, the researchers scheduled the first night of the study to enable the participants to get familiar with the lab setting and instrumentation, thus allowing the experimenters to concentrate on the second night for data analysis. The team recruited 124 women patients diagnosed with myofascial (muscle-based) TMD from NYU’s dental school clinics and compared them with a control group of 46 women who were either acquaintances of the patients or recruited from other NYU clinics and well-matched in age and other demographics. Neither group was initially recruited based on whether they believed that they bruxed or not.

Here’s what the investigators found:

  • In follow-up interviews 55.3% of the TMD group said they were told that they were sleep bruxers (SB) compared to 15.2% of controls.
  • But actual PSG measurements showed much lower and very similar rates of SB in both groups: patients 9.7%; controls 10.9%.
  • Grinding noises (but not meeting SB criteria) were common in both groups: 78.3% for patients; 59.7% for controls.
  • Overall, both groups spent an average of less than one minute per night in SB episodes and less than 5 minutes in total activity involving the chewing muscles.
  • Within the patient group those found to be bruxers
    reported less pain and less interferences with daily activities
    than the non-bruxing patients.

The authors conclude: “Our study should lay to rest any remaining beliefs regarding a relationship between SB and the course of myofascial TMD. Although there may be other reasons for treating SB (for example, tooth wear) the treatment decision should not be based on a concern for maintaining or exacerbating a chronic, painful myofascial TMD condition.”

We asked Dr. Raphael to comment on her study. Her response: "When your dentist tells you that your facial pain is somehow 'your fault' because you are grinding your teeth, you now know that it is simply not true. Many people grind their teeth a little bit at night, but that activity cannot account for your pain. If anything, people who suffer from the most severe TMD pain are actually the least likely to grind their teeth at night. If you are thinking about getting treatment for sleep grinding to help reduce your pain, think again: It is likely to be a waste of time, energy and money."   by Joan Wilentz

Source: Raphael K., Sirois D., Janal M., Wiegren P., Dubrovsky B., Nemelivsky
L., Klausner J., Krieger A., Lavigne G., Sleep bruxism and myofascial
temporomandibular disorders: A laboratory-based polysomnographic
investigation, JADA 2012; 143(11):1223-1231.

TMJ Disorders


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