[目的]比较股骨近端抗旋转髓内钉(proximal femoral nail anti-rotation,PFNA)与InterTAN髓内钉联合抗骨质疏松治疗骨质疏松性粗隆间骨折的临床疗效。[方法]回顾性分析2016年1月-2019年1月苏州大学第一附属医院骨科诊治的骨质疏松性股...[目的]比较股骨近端抗旋转髓内钉(proximal femoral nail anti-rotation,PFNA)与InterTAN髓内钉联合抗骨质疏松治疗骨质疏松性粗隆间骨折的临床疗效。[方法]回顾性分析2016年1月-2019年1月苏州大学第一附属医院骨科诊治的骨质疏松性股骨粗隆间骨折的老年患者的临床资料,共102例纳入本研究。依据术前医患沟通结果,53例患者采用PFNA固定,49例采用InterTAN固定。比较两组围手术期、随访及影像学指标。[结果]两组患者均顺利完成手术,InterTAN组手术时间、切口长度、术中出血量均显著优于PFNA组(P<0.05)。所有患者均随访12〜32个月,平均(22.52±6.41)个月。InterTAN组在下地行走时间和完全负重活动时间均显著早于PFNA组(P<0.05)。随术后时间推移,两组髋伸屈ROM、髋内旋-外旋ROM及Harris评分均显著增加,术后6个月和末次随访时InterTAN组上述指标均显著优于PFNA组(PC0.05)。影像方面,InterTAN组患者的复位优良率显著高于PFNA组(P<0.05)。至末次随访时,两组患者骨折均愈合,无骨不连接。末次随访时InterTAN组股骨短缩显著小于PFNA组(P<0.05),而InterTAN组的颈干角显著大于PFNA组(P<0.05)。[结论]对于骨质疏松性粗隆间骨折,InterTAN内固定的临床效果明显优于PFNA。展开更多
The single-pass hot compressions of two 5%Ni steels with and without niobium addition at different temperatures of 800-1 150℃and strain rates of 0.01-1s-1 were performed by using a Gleeble-3500 thermal simulator and ...The single-pass hot compressions of two 5%Ni steels with and without niobium addition at different temperatures of 800-1 150℃and strain rates of 0.01-1s-1 were performed by using a Gleeble-3500 thermal simulator and the effect of niobium on the dynamic recrystallization （ DRX ） behavior was analyzed.The results showed that the niobium addition of 0.04% can retard DRX in 5%Ni steel significantly by increasing the activation energy for DRX from 394 to 462kJ / mol.The critical strain required for starting DRX in 5%Ni steel was increased by 0.04-0.10 with niobium addition when the steel was deformed at a strain rate of 0.01s-1 and temperatures varied from 950 to 1 000℃.The critical temperature required for starting DRX in 5%Ni steel was also increased from 1 000 to 1 050℃ with niobium addition when the steel was deformed at a strain rate of 0.1s-1 .Such a retarded DRX occurring in Nb-added 5%Ni steel can be attributed to the pinning effect of precipitates containing niobium.展开更多
文摘[目的]比较股骨近端抗旋转髓内钉(proximal femoral nail anti-rotation,PFNA)与InterTAN髓内钉联合抗骨质疏松治疗骨质疏松性粗隆间骨折的临床疗效。[方法]回顾性分析2016年1月-2019年1月苏州大学第一附属医院骨科诊治的骨质疏松性股骨粗隆间骨折的老年患者的临床资料,共102例纳入本研究。依据术前医患沟通结果,53例患者采用PFNA固定,49例采用InterTAN固定。比较两组围手术期、随访及影像学指标。[结果]两组患者均顺利完成手术,InterTAN组手术时间、切口长度、术中出血量均显著优于PFNA组(P<0.05)。所有患者均随访12〜32个月,平均(22.52±6.41)个月。InterTAN组在下地行走时间和完全负重活动时间均显著早于PFNA组(P<0.05)。随术后时间推移,两组髋伸屈ROM、髋内旋-外旋ROM及Harris评分均显著增加,术后6个月和末次随访时InterTAN组上述指标均显著优于PFNA组(PC0.05)。影像方面,InterTAN组患者的复位优良率显著高于PFNA组(P<0.05)。至末次随访时,两组患者骨折均愈合,无骨不连接。末次随访时InterTAN组股骨短缩显著小于PFNA组(P<0.05),而InterTAN组的颈干角显著大于PFNA组(P<0.05)。[结论]对于骨质疏松性粗隆间骨折,InterTAN内固定的临床效果明显优于PFNA。
基金Item Sponsored by National High Technology Research and Development Program of China ( 2007AA03Z506 )
文摘The single-pass hot compressions of two 5%Ni steels with and without niobium addition at different temperatures of 800-1 150℃and strain rates of 0.01-1s-1 were performed by using a Gleeble-3500 thermal simulator and the effect of niobium on the dynamic recrystallization （ DRX ） behavior was analyzed.The results showed that the niobium addition of 0.04% can retard DRX in 5%Ni steel significantly by increasing the activation energy for DRX from 394 to 462kJ / mol.The critical strain required for starting DRX in 5%Ni steel was increased by 0.04-0.10 with niobium addition when the steel was deformed at a strain rate of 0.01s-1 and temperatures varied from 950 to 1 000℃.The critical temperature required for starting DRX in 5%Ni steel was also increased from 1 000 to 1 050℃ with niobium addition when the steel was deformed at a strain rate of 0.1s-1 .Such a retarded DRX occurring in Nb-added 5%Ni steel can be attributed to the pinning effect of precipitates containing niobium.
