2011
DOI: 10.1179/crn.2011.004
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Influence of Jaw Clenching and Tooth Grinding on Bilateral Sternocleidomastoid EMG Activity

Abstract: This study compares the effect of tooth clenching and grinding on sternocleidomastoid electromyographic (EMG) activity during different laterotrusive jaw posture tasks. The study included 28 healthy subjects with natural dentition and bilateral molar support, 14 with bilateral canine guidance and 14 with bilateral group function. Bipolar surface electrodes were located on the left and right sternocleidomastoid muscles. EMG activity was recorded during the following tasks: (A) eccentric grinding from intercuspa… Show more

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Cited by 25 publications
(15 citation statements)
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“…The results are not directly comparable with those from previous investigations, because no force‐controlled studies at maximum grinding‐force and no recordings of the deeper neck muscles are available. However, previous findings of co‐contractions for the SCM, SH and IH complexes, reported for maximum jaw muscle activation, are confirmed by our results. It should be emphasised that the experiment was performed on subjects consciously performing grinding tasks.…”
Section: Discussioncontrasting
confidence: 91%
“…The results are not directly comparable with those from previous investigations, because no force‐controlled studies at maximum grinding‐force and no recordings of the deeper neck muscles are available. However, previous findings of co‐contractions for the SCM, SH and IH complexes, reported for maximum jaw muscle activation, are confirmed by our results. It should be emphasised that the experiment was performed on subjects consciously performing grinding tasks.…”
Section: Discussioncontrasting
confidence: 91%
“…16,17,18,45,46 For this reason, it has to be asked at what point a stomatognathic system decompensates and turns to a disorder which requires a therapy. Further, some recent studies among the relationship of sleep bruxism and posture 19,20,21,22,23,24,25 give an initial hint that consequences of sleep bruxism may be also detectable in other peripheral areas of the whole body. However, it should be pointed out that the last attempt requires further scientific evaluation to support a cause–effect relation due to diverse reasons (e.g., partly reported by means of case reports and studies including only small sample sizes).…”
Section: Discussionmentioning
confidence: 99%
“…9,16,17,18 For some past time, by indicating a relationship between bruxism and posture, diverse studies draw the attention to a more extensive context. 19,20,21,22,23,24,25 However, the authors of a recently published review come to the conclusion that a scientific prove to support a cause–effect relationship is still missing. 26 …”
Section: Introductionmentioning
confidence: 99%
“…Isolated co‐activation patterns between and within the masticatory muscles or between the neck muscles have been documented in previous studies under static and dynamic conditions by use of needle and/or surface electromyography (EMG). Co‐activation of single neck muscles and the masticatory muscles during maximum clenching have been investigated in several studies .…”
Section: Anterolateral Neck Muscles and Their Main Functionsmentioning
confidence: 99%