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首页> 外文期刊>Journal of Hand Surgery. American Volume >Force Required to Maintain Reduction of a Preexisting Scapholunate Dissociation
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Force Required to Maintain Reduction of a Preexisting Scapholunate Dissociation

机译：需要维持预先存在的透析型解离的力所需的力

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PurposeTo determine the force required to maintain reduction of Geissler grade 4 scapholunate dissociations during physiological wrist motions. MethodsFresh-frozen cadaveric wrists with Geissler grade 4 scapholunate dissociations were identified by arthroscopy. Following reduction, a load cell was attached to measure the force across the scapholunate joint at a neutral position and during 4 different wrist motions re-created using a servohydraulic wrist simulator, including a large flexion-extension motion (FEM), small and large dart-thrower’s motions (DTMs), and a large DTM with ulnar offset. ResultsFive wrists with isolated preexisting scapholunate interosseous ligament (SLIL) tears were analyzed. The force required to maintain reduction was significantly greater in extension than in flexion during the large FEM and large DTM with ulnar offset. The forces were significantly larger in this study of preexisting SLIL dissociations compared with results from a prior study of acutely sectioned SLILs. In addition, forces to maintain reduction during DTMs were significantly less than forces during FEMs. Finally, a set of 3 wrists with preexisting scapholunate and lunotriquetral interosseous ligament (LTIL) tears were identified and had significantly decreased forces to maintain reduction at maximum extension and had decreased maximal forces during a cycle of motion compared with the wrists with isolated SLIL tears. ConclusionsThe forces required to maintain reduction of a Geissler grade 4 wrist are higher than forces after acutely sectioned SLIL. The forces are greater in extension than in flexion and less during the DTM compared with the FEM. Wrists with both SLIL and LTIL tears required less force to maintain reduction than those with isolated SLIL tears. Clinical relevanceThis study helps determine the strength of reconstruction required to maintain reduction of a Geissler grade 4 scapholunate dissociation.
机译：Purposeto确定了在生理腕部运动期间维持Geissler级4级扫描素分离所需的力量。方法通过关节镜检测与Geissler 4级静脉晶类解离的杂烩尸体手腕。减少后，连接了一种负载电池，以在空档位置和4种不同的手腕运动中测量扫描素接头的力，并使用伺服术腕部模拟器重新创建，包括大屈曲 - 延伸运动（FEM），小型和大型飞镖 - 杆的动议（DTM）和尺子偏移的大型DTM。分析了患有分离的预先存在的透析透明苷曲线（SLIL）眼泪的结果。在大型有限元和大型DTM期间，延伸期间保持减少所需的力明显更大，并且具有尺寸偏移。与急性切片梭菌的先前研究的结果相比，该力在这项预先存在的SLIL解离的研究中显着较大。此外，在FEM期间，在DTM期间保持降低的力显着小于力。最后，鉴定了一组具有预先存在的透析透析曲线曲线（LTIL）泪液（LTIL）撕裂的3个手腕，并且在与腕子的循环期间，在最大延伸期间保持降低的力量显着降低，并且与具有分离的SLIL撕裂的手腕相比，在运动周期内具有降低的最大力。结论维持艺术队4级手腕减少所需的力量高于急性切片薄片后的力量。在与FEM相比，延伸的延伸力比屈曲和较少的力更大。与SLIL和LTIL撕裂的手腕需要较少的力，以维持比与孤立的SLIL撕裂的力量减少。临床相关性研究有助于确定维持Geissler 4级扫描素解离的减少所需的重建强度。

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