토끼의 프리모 순환계(경락순환계로 불리움)의 연결망을 표시하기 위해, 형광 나노자성입자의 유체와 안정되게 혼합시킨 알시안블루 용액을 토끼의 복대정맥 근처의 림프노드에 주입하였다. 림프노드에 혼합 염색액을 주입한 후, 림프관 내부 프리모관의 색이 진한 청록색으로 표시되었다. 림프관 내부에 떠있는 프리모관 존재를 확인되었고, 채취된 림프관과 프리모관을 체외에서 생리식염수를 패트리디쉬에 담아 놓은 후 영구자석의 수평 운동에 따라 프리모관의 주기 운동을 사용하여 자기적 특성이 관찰되었다. 분리되어 채취한 프리모관의 휘어짐 정도는 알시안불루와 형광 나노자성입자를 흡착한 프리모관 내부를 통과하는 자기장의 세기에 의존함을 알 수 있었다.
Temporomandibular joint (TMJ) disorder leads to pain and limited opening range. TMJ disorder are caused by occlusal problem, bad habit, and muscular overactivity. The TMJ works bilaterally to create jaw motion; however, it moves asymmetrically during a production exercise. And most people move mandible toward their preferred side during a production exercise. In general, Masseter, main muscle used for chewing exercise, frequently results in TMJ disorder when biomechanical and physiological imbalance occurs. Therefore, the purpose of this study is to investigate the difference of TMJ movement range and the effect of masseter asymmetry on the TMJ pain in patients with and without TMJ pain. 30 subjects was recruited for this study, with 15 subjects with TMJ pain as the experimental group and 15 subjects with no TMJ pain as the control groups. Using Image J program, ranges of maximal mouth opening and mouth opening taken under only mandibular rotation were measured, and the thickness of masseter in the TMJ in resting condition was measured with the ultrasonography. The results of this study showed that there was a significant difference in the ratio of ranges of he maximum mouth opening and mouth opening taken under the mandibular rotation only(p<.05). However, no significant difference was found in the masseter’s thickness (p>.05). In this study, the results showed that the pain in the TMJ was not related to the asymmetry of the masseter’s thickness, and that the reduction of maximum opening and mandibular rotation were closely related to the pain. Therefore, training to use TMJ of both sides when chewing food may be helpful to prevent TMJ disorders. In addition, we recommend interventions to improve bad habits. Further studies qill bw continued in this field.
Background Although the temporomandibular joint (TMJ) is a bilateral joint, it is often used asymmetrically during active daily living. When there is a biomechanical or physiological imbalance in the masseter muscle, which is used to chew and close the mouth, a TMJ disorder can be occurred. Purpose The purpose of our study was to compare the extent to which subjects with and without TMJ pain could open their mouths and the asymmetry of masseter thickness. Study design A cross-sectional study Methods This study included 15 subjects with TMJ pain and 15 subjects without TMJ pain (control group). The maximum mouth opening and rotation mouth movement were measured using Image J, and masseter thickness was measured using ultrasonography. Results The results showed that there were significant differences in the maximum mouth opening and the rotation mouth movement between the groups (p<0.05). However, no significant difference was found in the asymmetry of the masseter thickness (p>0.05). Conclusions The pain felt in the TMJ was not related to the asymmetry of the masseter thickness; however, the maximum mouth opening and reduction of the rotation mouth movement were closely related to the pain level. Therefore, we recommend increasing the rotation mouth movement of the jaw to improve TMJ pain and solve the asymmetry of the rotation mouth movement of the jaw.
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