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首页> 美国卫生研究院文献>Trauma Case Reports >Complex metacarpophalangeal joint dislocation of the litter finger: A sesamoid bone seen within joint. What does it mean?
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Complex metacarpophalangeal joint dislocation of the litter finger: A sesamoid bone seen within joint. What does it mean?

机译：垃圾手指的复杂掌指关节脱位：关节内可见芝麻骨。这是什么意思？

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摘要

Dislocation of the metacarpophalangeal joint is a rare injury. The index finger is most frequently involved, followed by the thumb; the little finger is very seldom affected. The Complex dislocation of the little finger metacarpophalangeal joint is extremely rare. A few cases only had been described. Herein, we report a case of 40 years old presented, after a road accident, a dorsal metacarpophalangeal joint dislocation of the litter finger confirmed on radiographs with a clear view of the sesamoid bone within joint prompting the patient to undergo open reduction with no attempts of closed reduction initially. We elected, to treat our case, for the volar approach which allowed successful relocation of the head of the metacarpal in its anatomical position. The view of sesamoid bone within the joint is pathognomonic of volar plate entrapment. Recognition of this fact should alert the treating physician to the inevitability of open reduction for anatomical repositioning of the joint and avoid repeated attempts at closed reduction which may arise the risk of degenerative arthritis and reduced final range of motion.
机译：掌指关节脱位是罕见的损伤。食指最常见，其次是拇指。小手指很少受到影响。小指掌指关节的复杂脱位非常罕见。仅描述了少数情况。在此，我们报告一例40岁的老人，发生交通事故后，X射线照片上证实了乱抛垃圾的手指的掌指掌背关节脱位，并清楚地看到了关节内的芝麻骨，促使患者进行了切开复位手术，没有进行任何尝试最初是封闭式还原。为了选择合适的方法，我们选择了掌侧入路，这种方式可以成功地将掌骨的头部重新置于解剖位置。关节内的芝麻骨视图是掌板陷留的病理表现。认识到这一事实将使主治医生警惕必须进行复位复位术以复位关节的解剖结构，并避免重复尝试闭合复位术，这可能会引起退行性关节炎和降低最终运动范围的风险。

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