Reducing the Risk of Ring Breakage in Taylor Spatial Frames: The Effect of Frame Configuration on Strain at the Half-ring Junction.
Reducing the Risk of Ring Breakage in Taylor Spatial Frames: The Effect of Frame Configuration on Strain at the Half-ring Junction.
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DOI：
10.5005/jp-journals-10080-1508
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发表时间：
2020-09
影响因子：
0.8
通讯作者：
Goodier D
中科院分区：
文献类型：
--
作者：
Iliadis AD;Bebja R;Wang K;Moazen M;Wright J;Calder P;Goodier D
我们已经遇到了四例泰勒空间框架(TSF)(Smith&Nephew，孟菲斯，田纳西州，美国)在远端环的半环交界处断裂的情况。这项研究检查了加载过程中远端环不同位置产生的应变以及改变框架结构对应变的影响。我们在胫骨锯骨模型上安装了两个环形TSF结构。近端环在所有结构中都是相同的，由一个2/3180 mm的环与三根钢丝相连组成。构造1正在复制看到失败的案例的配置。远端155 mm环用三个半销连接。半环连接位于中线。构件2在远端环上有不同的半引脚放置和额外的导线。结构3和4具有与结构1相同的半销配置，但远端环分别向内和向外旋转60°。应变计安装在不同的位置，并在加载过程中记录测量结果。进行统计学分析。最高应变值记录在构建体1和2的半环连接处(>；600微应变(με)在拉伸)。将环向内旋转60°可显著降低半环结处的应变(<；300με)，而向外旋转60°可进一步降低应变(<；180με)。环应变在靠近半销附着体的区域较高。当半环承受不同的加载模式时，半环连接处的应变最大。半环厚度减半，面积二次力矩减小，进一步增加了破损风险。根据解剖学安全区的规定，将该连接放置在靠近半针-框架界面的位置进一步增加了应变。将远端环旋转60°可显著降低半环连接处的应变。环断裂是一种罕见但严重的并发症。这是第一次对这种潜在的TSF故障模式进行研究。来自这项研究的见解和技术提示可以帮助减少这种情况。王凯，等。降低泰勒空间框架中环断裂的风险：框架配置对半环连接处应变的影响。《创伤肢体重建战略》2020；15(3)：146-150。
We have encountered four cases with Taylor spatial frames (TSF) (Smith & Nephew, Memphis, TN, USA) with breakage at the half-ring junction of the distal ring. This study examines the strain produced on different locations of the distal ring during loading and the effects on the strain of altering the frame construct. We mounted two ring TSF constructs on tibia saw bone models. The proximal ring was the same in all constructs and consisted of a 2/3 180 mm ring attached with three wires. Construct 1 is reproducing the configuration of cases where failure was seen. The distal 155 mm ring is attached with three half pins. The half-ring junction is located in the midline. Construct 2 has a different half pin placement and an additional wire on the distal ring. Constructs 3 and 4 have the same half pin configuration to construct 1 but the distal ring is rotated 60° internally and externally, respectively. Strain gauges were attached to different locations and measurements recorded during loading. Statistical analysis was performed. Highest strain values were recorded at the half-ring junction of constructs 1 and 2 (>600 microstrains (με) in tension). Rotating the ring 60° internally significantly reduces the strain at the half-ring junction (<300 με) whilst external rotation by 60° further reduces the strain (<180 με). Ring strain is higher in areas close to half pin attachments. The highest strain is in the half-ring junction as the half rings are subjected to different loading modes. The thickness of the half-ring is halved and the second moment of area reduced further increasing breakage risk. Placing this junction close to the half pin–frame interface, as dictated by the anatomical safe zone further increases the strain. Rotating the distal ring 60° significantly reduces the strain at the half-ring junction. Ring breakage is a rare but significant complication. This is the first study to address this potential mode of TSF failure. Insights and technical tips from this study can help reduce this. Iliadis AD, Bebja R, Wang K, et al. Reducing the Risk of Ring Breakage in Taylor Spatial Frames: The Effect of Frame Configuration on Strain at the Half-ring Junction. Strategies Trauma Limb Reconstr 2020;15(3):146–150.