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Biomechanical Study of KMC Transspinous Process Wiring Technique with Luque Segmental Spinal Instrumentation

經棘突使用洛基氏桿分節鋼線固定新方法(高醫法)生物力學特性之測定研究

摘要


分節脊椎板下鋼線固定在實驗上及臨床上均被認為是矯正及固定脊柱很堅固的方法,但是由於容易發生神經傷害,所以我們設計了新的鋼線固定法,將鋼線固定的位置由脊椎板下改到棘突固定;依鋼體力學推算這種新的固定方法縱軸方向產生新的而且較強的固定力,因此預期可以得到好的固定性,為了分析這種新方法,我們設計利用羊脊椎為試驗品,而以Instron model 1332為試驗機器,在動態之下,模仿人體作前向彎曲試驗,並以Modified Wisconsin Method的棘突鋼線固定法為對照組比較,發現新的高醫固定法除了手術技術簡化,可以得到較高的彎曲耐力之外,尚有較少鋼線斷裂的可能性。

關鍵字

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並列摘要


An in vitro experiment was designed to evaluate the mechanical properties of a new trans spinous process wiring method (KMC method) for segmental spinal instrumentation by using the goat spine model and double Luque L rods. Specimens were tested by a universal testing machine with the cyclic 3-point bending load. Instrumentation with Wisconsin trans spinous process button & wire system was also tested for comparison. The experimental results show no difference in maximal bending load between two methods, but the KMC method provided greater rigidity in forward bending and less incidence of wire breakage.

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