fa Intramuscular changes of soft and hard areas after low-level static contraction of the masseter muscle and the correlations with muscle hardness and increase in water content: evaluations with sonographic elastography and magnetic resonance imaging رادیولوژی دهان، فک و صورت Oral and Maxillofacial Radiology پژوهشي Research <p> <strong>Objectives </strong></p><p> To investigate the intramuscular changes on sonographic elastography (SE) after low-level static contraction of the masseter muscle, and to clarify the relationship with the total hardness and edematous change. </p><p> <strong>Study design</strong></p><p>  Ten healthy volunteers performed sustained bilateral biting at 20% of maximal voluntary contraction for 10 min. The SE and magnetic resonance (MR) scans of the masseter muscles were performed before, immediately after, and 10 min after exercise. The masseter muscle elasticity index (MEI) ratio, muscle thickness, and intramuscular soft and hard areas distribution were evaluated on SE images. The signal to noise ratio (SNR), indicating the water content, was measured on MR images. </p><p> <strong>Results</strong></p><p>  The soft area ratio showed significant correlations with the water content expressed as SNR. The hard area ratio showed significant correlations with the total muscle hardness expressed as the MEI ratio.</p><p> <strong> Conclusion</strong></p><p>  Intramuscular soft and hard areas could be used both clinically and experimentally. </p><hr><p></p><p> <strong>Source: </strong>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology </p><p> <a href="http://www.oooojournal.net/article/S2212-4403(13)00272-1/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-1714&slc_lang=fa&sid=1 Yoshiko Ariji 10031947532846008069 10031947532846008069 Yes Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan Miwa Nakayama 10031947532846008070 10031947532846008070 No Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan Akira Taguchi 10031947532846008071 10031947532846008071 No Department of Oral and Maxillofacial Radiology, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan Akihiko Gotoh 10031947532846008072 10031947532846008072 No Department of Oral and Maxillofacial Surgery, Aichi-Gakuin University School of Dentistry, Nagoya, Japan Yoshitaka Kise 10031947532846008073 10031947532846008073 No Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan Aakitoshi Katsumata 10031947532846008074 10031947532846008074 No Department of Oral Radiology, Asahi University School of Dentistry, Hozumi, Japan Kenichi Kurita 10031947532846008075 10031947532846008075 No Department of Oral and Maxillofacial Surgery, Aichi-Gakuin University School of Dentistry, Nagoya, Japan Eiichiro Ariji 10031947532846008076 10031947532846008076 No Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Medicine