The association of medial scapular muscle pain on distance of mouth opening in participants with scapulocostal syndrome: an exploratory study
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Abstract
Evidence-based studies have reported an association between myogenous-temporomandibular disorder and medial scapular muscle pain. However, the influence of medial scapular muscle pain on distance of mouth opening has still not been investigated. This study aimed to investigate the effect of medial scapular muscle pain on distance of mouth opening in participants with scapulocostal syndrome (SCS). One-hundred and one convenient participants with SCS totaling more than 3 months (14 males and 87 females) were recruited. Participants were divided into three groups consisting of mild, moderate, and severe pain (aged 26.33 ± 1.16, 27.85 ± 0.76, and 27.44 ± 1.10, respectively). The distance of mouth opening was measured in two conditions; pain-free mouth opening and maximum mouth opening. The distance of mouth opening among three groups were compared using Kruskal-Wallis test with Dunn-Bonferroni post hoc analysis. Kruskal Wallis test reported that the distance of maximum mouth opening was significantly different among three groups (p-value < 0.035). Dunn-Bonferroni post hoc found a statistically significant difference in distance of maximum mouth opening between moderate and severe pain groups (p-value = 0.042). In conclusion, medial scapular muscle pain tends to influence maximum mouth opening. Therefore, therapists should assess the distance of maximum mouth opening amid treatment of patients with SCS.
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