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Research on ultrasonic measurement of masticatory muscles thickness of group without myofacial pain dysfunction
myofascial pain,temporomandibular disorders,reliability,ultrasound,muscle thickness,
|Publication Year :||2019|
右側外翼肌中段在最下開口狀態下中段厚度為14.65±1.38 mm，左側外翼肌中段厚度為14.68±1.11 mm。外翼肌中段肌肉厚度，左右兩側無顯著差異(P<0.05)，與性別呈現顯著相關(P<0.05)，和身體質量指數則無顯著相關。左側外翼肌中段外，在最大開口下與年齡呈顯著相關(P<0.05)。
Purpose: Myofascial pain dysfunction (MPDS) is a common symptom of temporomandibular disorders (TMD). Physical muscle palpation is the main method of examination. However, the inter rater reliability of muscle palpation was not well. Considering the thickness of masticatory muscles vary by their condition, using the real-time, convenient, cost effective ultrasound to measure the muscle thickness would be a suitable investigation method. The purpose of this study is to build a reliable and accurate method of measuring masticatory muscle thickness by ultrasound and elucidate the collecting data.
Methods: 48 participants diagnosed with no MPDS were included in this study. After the validity and reliability of the ultrasound measuring protocol were confirmed, the masticatory muscle thickness was measured and analyze.
Results: The right masseter muscle thickness was from 12.13±2.35mm to 16.26±2.43mm. The left masseter muscle thickness was from 12.75±3.19mm to 16.49±2.52mm. There was no significant difference between the data of right side and left side. Most of the measuring positions showed that gender and BMI were strongly correlated to the masseter muscle thickness (P<0.05) While removing the impact of gender, BMI was not significantly correlated to the masseter muscle thickness . Neither the amount of maximal mouth opening nor the symmetry of the mandible had significant effect on the masseter muscle thickness.The right anterior temporalis muscle thickness was between 5.19±0.77mm and 5.30±0.77mm，the left anterior temporalis muscle thickness was between 5.06±0.71mm and 5.26±0.72mm. The right side data had no significant difference with the left side. Gender had a significant correlation with right anterior temporalis muscle under clenching, left anterior temporalis muscle under relaxing, clenching and maximum mouth opening. (P<0.05) Unless the right anterior temporalis muscle under clenching, all the other measuring positions correlate to the BMI. Age had no impact on the thickness of the anterior temporalis muscle.The right lateral pterygoid muscle thickness was 114.65±1.38 mm in the middle while the left lateral pterygoid muscle thickness was 14.68±1.11 mm in the middle There was no significant difference between the right side and left side of the middle lateral pterygoid muscle thickness. Gender was a significant factor effecting the muscle thickness (P<0.05) while the BMI was not. Age was also correlated to the left lateral pterygoid muscle thickness measured from the middle part.
Conclusion: Muscle palpation is the main method of examining myofascial pain Nowadays. However the inter-rater reliability was not well. The muscle size of the patient with MPDS might vary with the muscle condition. In the present study, we built up a protocol of measuring masticatory muscle thickness by ultrasound and the validity and reliability were good. Following this protocol, we gathered the data of masseter muscle, anterior temporalis muscle and lateral pterygoid muscle thickness from participants without MPDS. After statistical analysis, the masseter muscle, anterior temporalis muscle and lateral pterygoid muscle thickness have no significant difference between the right and left side. Comparing to the previous similar study, the masseter muscle thickness in present study was thicker. Gender and BMI had most of the impact on masseter muscle thickness, but BMI was more strongly correlated to the anterior temporalis muscle thickness. However, the lateral pterygoid muscle thickness was correlated to gender and age.
|Appears in Collections:||臨床牙醫學研究所|
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