• 1 Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China; 2 Department of Orthopedics and Traumatology, the First Affiliated Hospital of Henan College of Traditional Chinese Medicine, Zhengzhou, Henan 450000, P. R. China.;
TU Chongqi., Email: 851733278@qq.com
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目的  通過對保留不同平面骶骨的新鮮人骨盆模型進行生物力學測試,分析骶骨切除平面與骨盆穩定性的關系,明確骶骨切除保留至何種程度時需行腰骶髂穩定性重建。 方法  選用6具正常成年男性新鮮尸體腰5-骨盆標本,采用200 N增量分級加載,以1.4 mm/min速率平穩加載直至1 000 N,依次測試保留完整骶骨及不同平面骶骨切除骨盆模型的最大主應力、剪切應力、位移及剛度變化,比較各組間的差異。最后測量1/2S1組骨盆環的極限載荷,記錄骨折發生部位和骨折類型。 結果  隨骶骨切除平面增高,最大主應力、剪切力及骶骨下沉位移在各測試點均有不同程度增大,骨盆的軸向剛度不斷減小。當切除平面達骶1時,變化明顯,尤其以經過骶1下1/4~下1/2時變化顯著,與完整骶骨組比較,差異有統計學意義(P<0.05)。骶1椎體下1/2平面切除后,骨盆的極限載荷是(2 375.97 ± 162.41)N,骨盆的破壞形態為經骶髂關節或骶椎的骨折。 結論  骶骨切除范圍與骨盆環的穩定性密切相關,隨著骶骨切除平面升高,殘留骶髂關節各種應力急劇增高,骨盆的穩定性明顯下降。當骶骨切除涉及骶1椎
體時,極易發生骨折,需要進行腰骶髂局部重建以增強骶髂關節的穩定性。

Citation: LUO Yi,JIANG Yong,ZHANG Xuelei,TANG Fan,ZHOU Yong,MIN Li,ZHANG Wenli,DUAN Hong,TU Chongqi.. Research on Biomechanical Stability of Pelvis after Subdivided Sacrectomy. West China Medical Journal, 2013, 28(10): 1536-1540. doi: 10.7507/1002-0179.20130486 Copy

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