Cerezen is, according to its makers, a first-of-its-kind medical device that is a safe and effective aid in reducing temporomandibular joint (TMJ) disorder pain and associated symptoms such as grinding of teeth and headaches. It is available in the UK and Ireland, and was on display at Identex. The device consists of two custom-made, hollow ear canal inserts that allow full passage of sound and are practically invisible from the outside. Traditionally, TMJ disorder has been treated with bite splints that are worn at night, and because the Cerezen device is comfortable and discreet, it makes daytime patient compliance easy.
The Cerezen device takes a different approach in treating TMJ disorder. The ear canal is located very close to the temporomandibular joint and the volume of the ear canal increases when the jaw is opened through movements such as chewing, smiling, and speaking. The Cerezen device uses this anatomical change to provide a unique near field treatment.
Patients wearing the device in a three-month clinical study experienced a significant reduction in the pain and dysfunction associated with TMJD. In addition to the pain reduction, 100% of subjects indicated excellent (71%) or good (29%) overall satisfaction with the Cerezen device. During the three-month clinical study, patients wearing the Cerezen device did not report any unexpected or serious adverse events, and a comparable safety profile to the stabilisation splint was observed.  It is not recommended that patients wear the device while bathing, swimming or in a moist environment such as a steam bath and sauna. It is recommended that it be removed when participating in contact sports.