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Recent study in Japan finds a possible link between bruxism and periodontal disease

Reserachers in Japan may have found a possible link between periodontal disease and bruxism in their study using a electromyographic device. Picture Niranjan p

Mon. 1 October 2018


OKAYAMA, Japan: Researchers from Okayama University in their recent study looked into whether there was any relation between specific pattern concerning involuntary masseter muscle activity and the severity of periodontitis. In their study they subjected a group of people with various degrees of periodontitis to detailed measurements which further revealed that bruxism might be related to the acuteness of periodontal disease.

This study, titled “Relationship between severity of periodontitis and masseter muscle activity during waking and sleeping hours”, was published in the Archives of Oral Biology on 1 March 2018.

Two groups were made of the total of 31 participants who took part in the study. One group of 16 had no or mild periodontitis (NMP), with the other group (of  remaining 15) had moderate to severe periodontitis (MSP).  Participants were provided with a portable electromyography (EMG) device in order to be monitored both day and night to achieve accurate results.

Participants of the study were informed to wear the device all the time and keep a diary of their daily activities like time of meals  to help filter out muscular activity  unrelated to the study which was involuntary teeth grinding.  A monitoring voice activity from a microphone attached to the EMG device aid in filtering out teeth movement due to speech.

According to the study’s results, during both waking and sleeping hours, the duration of masseter muscle activity was significantly longer in the MSP group than in the NMP group. However, due to oral conditions such as missing teeth or the use of removable partial dentures not being taken into account, as well as the limited capabilities of the EMG setup, researchers stated that bruxism leading to periodontitis could not be concluded.