CAJ | 학술논문

目的研究在体示、中、环、小指掌指关节屈伸运动时尺桡侧侧副韧带的长度变化.方法以螺旋CT扫描6例志愿者的示、中、环、小指的掌指关节,分别获得各掌指关节在0°至屈曲90°内每隔30°的运动范围内掌骨中段以远至近节指骨中段的图像,三维重建骨结构图像后经软件处理得到在各掌指关节屈伸运动时尺桡侧侧副韧带的长度变化.结果掌指关节屈曲时,尺桡侧侧副韧带的背侧束逐渐伸长,而掌侧束相对缩短,中间束长度无明显的变化规律.结论掌指关节屈伸活动时侧副韧带都处于紧张状态,只是韧带内部相对紧张、松弛的部位及程度不同.它屈曲时主要存在2种相对的运动:侧副韧带的背侧束伸长,紧张性增大;掌侧束缩短,紧张性相对减小;而中间束始终保持了合适的紧张度,共同限制和调节关节的运动.
목적 연구재체시、중、배、소지장지관절굴신운동시척뇨측측부인대적장도변화.방법 이라선CT소묘6례지원자적시、중、배、소지적장지관절,분별획득각장지관절재0°지굴곡90°내매격30°적운동범위내장골중단이원지근절지골중단적도상,삼유중건골결구도상후경연건처리득도재각장지관절굴신운동시척뇨측측부인대적장도변화.결과 장지관절굴곡시,척뇨측측부인대적배측속축점신장,이장측속상대축단,중간속장도무명현적변화규률.결론 장지관절굴신활동시측부인대도처우긴장상태,지시인대내부상대긴장、송이적부위급정도불동.타굴곡시주요존재2충상대적운동:측부인대적배측속신장,긴장성증대;장측속축단,긴장성상대감소;이중간속시종보지료합괄적긴장도,공동한제화조절관절적운동.
Objective To investigate changes in collateral ligament length during flexion and extension of the metacarpophalangeal joint (MCJ) of the four fingers. Methods Spiral CT scans of the MCJ of the index, middle, ring and little fingers were obtained from 6 volunteers. Images from the mid-metacarpal to midproximal phalanx were acquired while the MCJ moved from 0° of flexion to 90° of flexion with 30° inerements.Changes in length of the collateral ligament of MCJ of each individual finger during MCJ movement were analyzed by software processing after three-dimensional image reconstruction of bone structures were obtained. Results During flexion of the MCJ the dorsal bundle of the ulnar and radial collateral ligaments lengthened, while the volar bundle shortened. The length of the middle bundle did not change significantly. Conclusion During MCJ flexion and extension, the collateral ligaments are in a state of tension. However tension in different portions of the ligament varies. There are two main relative movements during MCJ flexion: lengthening of the dorsal bundle of the collateral ligament results in increased tension and shortening of the volar bundle results in decreased tension. The middle bundle always maintains proper tension, restricting and regulating the movement of the joint.