目的:比较斜外侧入路椎间融合术(oblique lateral interbody fusion,OLIF)联合不同固定方式治疗腰椎滑脱症的早期临床疗效及并发症情况。方法:回顾性分析2020年1月~2022年1月于我院接受OLIF治疗的腰椎滑脱症患者53例,其中男性24例,女性2...目的:比较斜外侧入路椎间融合术(oblique lateral interbody fusion,OLIF)联合不同固定方式治疗腰椎滑脱症的早期临床疗效及并发症情况。方法:回顾性分析2020年1月~2022年1月于我院接受OLIF治疗的腰椎滑脱症患者53例,其中男性24例,女性29例,年龄62.17±9.72岁;OLIF联合侧方钢板(lateral plate,LP)固定组24例(LP组),OLIF联合后方椎弓根螺钉(pedicle screw,PS)内固定组29例(PS组)。两组患者的年龄、性别及体质指数(body mass index,BMI)等人群特征均无明显统计学差异。记录两组患者的手术时间、术中出血量、术后并发症情况。于术前、术后1周、3个月及12个月分别采用腰痛视觉模拟评分(visual analog scale,VAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)及影像学指标如椎间隙高度(disc height,DH)、椎间孔高度(foraminal height,FH)、椎管横截面积(cross-sectional area,CSA)来综合评价临床疗效。末次随访时根据Bridwell评估方法对椎间融合率进行评估。结果:随访时间为13.2±6.5个月(12~16个月)。LP组手术时间及术中出血量均显著性低于PS组(75.41±11.53min vs 127.05±5.62min,P<0.05;39.55±5.32mL vs 89.81±9.62mL,P<0.05)。两组患者术前VAS评分、ODI指数均无统计学差异,术后1周LP组VAS评分及ODI均优于PS组[3.05±0.67 vs 4.55±0.39,P<0.01;(17.36±2.76)%vs(22.80±6.02)%,P<0.01],但这种差异在术后1年时消失。LP组术前DH、FH及CSA分别为8.96±1.23mm,16.18±3.49mm和88.95±14.79mm^(2),术后1年分别为12.53±3.47mm、20.14±3.12mm、124.83±7.56mm^(2),较前均明显改善;PS组术前DH、FH及CSA分别为8.66±2.21mm、16.35±5.19mm、89.23±12.18mm^(2),术后1年分别为12.32±4.67mm、20.86±3.44mm、125.75±7.76mm^(2),较前均明显改善,但各参数在同期随访时无组间差异。LP组22例实现椎间融合,融合率为91.67%,略低于PS组(93.10%),但无统计学差异。LP组融合器沉降2例,腰骶丛损伤2例;PS组融合器沉降2例,腰骶丛损伤1例,�展开更多
目的:探讨锁定钢板内固定治疗股骨近端外侧壁骨折块后的效果。方法:2021年1月至2022年6月收治31例合并外侧壁骨折的股骨转子间骨折患者,其中15例单纯采用股骨近端防旋髓内钉(proximal femoral nail antirotation,PFNA)固定,男3例,女12例...目的:探讨锁定钢板内固定治疗股骨近端外侧壁骨折块后的效果。方法:2021年1月至2022年6月收治31例合并外侧壁骨折的股骨转子间骨折患者,其中15例单纯采用股骨近端防旋髓内钉(proximal femoral nail antirotation,PFNA)固定,男3例,女12例;年龄(75.87±7.46)岁;另16例采用PFNA内固定后再应用预弯好的3.5 mm螺孔锁定钢板内固定外侧壁骨折,男4例,女12例;年龄(76.15±9.47)岁。术后随访观察记录比较两组手术指标、尖顶距(tip-apical distance,TAD)、术后负重站立时间、骨折复位情况。术后6个月根据Harris髋关节评分评价术后髋关节功能。结果:两组患者均获得随访,时间7~17(12±5)个月。两组术后即刻颈干角为111°~132°(119.3±8.3)°。骨折复位效果:PFNA组,优11例,可2例,差1例;PFNA+锁定钢板组,优12例,可3例,差1例。PFNA组1例发生螺旋刀片经股骨头切出。两组手术时间、术中出血量及手术切口长度比较,差异有统计学意义(P<0.05);两组TAD及术后负重站立时间比较,差异无统计学意义(P>0.05)。两组术后6个月Harris各项评分和总分比较,差异有统计学意义(P<0.05)。结论:应用PFNA辅助锁定钢板内固定合并外侧壁骨折的股骨转子间骨折疗效确切,可较好恢复外侧壁完整性,提高PFNA内固定的稳定性,术后并发症少。展开更多
Purpose:Intramedullary implants are well accepted fixation of all types of intertrochanteric(IT)frac-tures,both stable and unstable types.Intramedullary nails have an ability to effectively support the posteromedial p...Purpose:Intramedullary implants are well accepted fixation of all types of intertrochanteric(IT)frac-tures,both stable and unstable types.Intramedullary nails have an ability to effectively support the posteromedial part,but fail to buttress the broken lateral wall requiring lateral augmentation.The aim of this study was to evaluate the outcome of proximal femoral nail augmented with trochanteric buttress plate for broken lateral wall with IT fractures,which was fixed to the femur through hip screw and anti-rotation screw nail.Methods:Of 30 patients,20 had Jensen-Evan typeⅢand 10 had type V fractures.Patients with IT fracture of broken lateral wall and aged more than 18 years,in whom satisfactory reduction was achieved by closed methods,were included in the study.Patients with pathologic or open fractures,polytrauma,prior hip surgery,non-ambulatory prior to surgery,and those who refused to participate were excluded.The operative time,blood loss,radiation exposure,quality of reduction,functional outcome,and union time were evaluated.All data were coded and recorded in Microsoft Excel spread sheet program.SPSS 20.0 was used for data analysis and normality of the continuous data was checked using Kolmogorv Smirnov test.Results:The mean age of patients in the study was 60.3 years.The mean duration of surgery(min),mean intra-operative blood loss(mL)and mean number of exposures were 91.86±12.8(range 70-122),144.8±3.6(range 116-208),and 56.6(range 38-112),respectively.The mean union time was 11.6 weeks and the mean Harris hip score was 94.1.Conclusion:Lateral trochanteric wall in IT fractures is significantly important,and needs to be recon-structed adequately.Nail-plate construct of trochanteric buttress plate fixed with hip screw and anti-rotation screw of proximal femoral nail can be successfully used to augment,fix or buttress the lateral trochanteric wall giving excellent to good results of early union and reduction.展开更多
An innovative occupant friendly retrofitting technique has been developed for reinforced concrete(RC) building structures with hollow brick infill walls used as partition walls which constitute the major portion of th...An innovative occupant friendly retrofitting technique has been developed for reinforced concrete(RC) building structures with hollow brick infill walls used as partition walls which constitute the major portion of the existing building stock in Turkey. The idea is to convert the existing hollow brick infill wall into a load carrying system acting as a cast-in-place RC wall by reinforcing it with relatively thin concrete plates bonded to the mortar coated infill wall by use of tile adhesive and fixed by 6(6 mm diameter) bolts. Test parameters were the shape and thickness of the plates, presence of reinforcement in plates, number and arrangement of 6 bolts. It was observed that lateral strength, stiffness, energy dissipation capacity, and ductility of the strengthened infill walls were improved and behaviour was enhanced by the proposed technique. Plates with two different basic shapes were used to strengthen the test specimens.展开更多
The paper describes the simulation of impact loads applied on plate panels with welding-induced residual stresses and deformation (WSD). Numerical simulations using FEM are carried out to study the influence of weldin...The paper describes the simulation of impact loads applied on plate panels with welding-induced residual stresses and deformation (WSD). Numerical simulations using FEM are carried out to study the influence of welding-induced residual stresses and deformation on the impact strength of plate panels. Welding is simulated using a three dimensional thermal mechanical coupled finite element method. The welding stress and deformation are taken as the initial imperfections in the impact strength analysis and their influence on the behavior of plate panels subjected to impact loadings. The impact loadings from the three directions, the lateral direction and two in-plane directions of the plate panels are studied. Results show a certain reduction in the impact strength due to the existence of welding stress and deformation in the plate panels. It is found that the reduction of impact force is strongly influenced by the welding deformation and the impact directions in the plate panels. This reduction is more significant when the impact force is in the lateral direction.展开更多
文摘目的:比较斜外侧入路椎间融合术(oblique lateral interbody fusion,OLIF)联合不同固定方式治疗腰椎滑脱症的早期临床疗效及并发症情况。方法:回顾性分析2020年1月~2022年1月于我院接受OLIF治疗的腰椎滑脱症患者53例,其中男性24例,女性29例,年龄62.17±9.72岁;OLIF联合侧方钢板(lateral plate,LP)固定组24例(LP组),OLIF联合后方椎弓根螺钉(pedicle screw,PS)内固定组29例(PS组)。两组患者的年龄、性别及体质指数(body mass index,BMI)等人群特征均无明显统计学差异。记录两组患者的手术时间、术中出血量、术后并发症情况。于术前、术后1周、3个月及12个月分别采用腰痛视觉模拟评分(visual analog scale,VAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)及影像学指标如椎间隙高度(disc height,DH)、椎间孔高度(foraminal height,FH)、椎管横截面积(cross-sectional area,CSA)来综合评价临床疗效。末次随访时根据Bridwell评估方法对椎间融合率进行评估。结果:随访时间为13.2±6.5个月(12~16个月)。LP组手术时间及术中出血量均显著性低于PS组(75.41±11.53min vs 127.05±5.62min,P<0.05;39.55±5.32mL vs 89.81±9.62mL,P<0.05)。两组患者术前VAS评分、ODI指数均无统计学差异,术后1周LP组VAS评分及ODI均优于PS组[3.05±0.67 vs 4.55±0.39,P<0.01;(17.36±2.76)%vs(22.80±6.02)%,P<0.01],但这种差异在术后1年时消失。LP组术前DH、FH及CSA分别为8.96±1.23mm,16.18±3.49mm和88.95±14.79mm^(2),术后1年分别为12.53±3.47mm、20.14±3.12mm、124.83±7.56mm^(2),较前均明显改善;PS组术前DH、FH及CSA分别为8.66±2.21mm、16.35±5.19mm、89.23±12.18mm^(2),术后1年分别为12.32±4.67mm、20.86±3.44mm、125.75±7.76mm^(2),较前均明显改善,但各参数在同期随访时无组间差异。LP组22例实现椎间融合,融合率为91.67%,略低于PS组(93.10%),但无统计学差异。LP组融合器沉降2例,腰骶丛损伤2例;PS组融合器沉降2例,腰骶丛损伤1例,�
文摘Purpose:Intramedullary implants are well accepted fixation of all types of intertrochanteric(IT)frac-tures,both stable and unstable types.Intramedullary nails have an ability to effectively support the posteromedial part,but fail to buttress the broken lateral wall requiring lateral augmentation.The aim of this study was to evaluate the outcome of proximal femoral nail augmented with trochanteric buttress plate for broken lateral wall with IT fractures,which was fixed to the femur through hip screw and anti-rotation screw nail.Methods:Of 30 patients,20 had Jensen-Evan typeⅢand 10 had type V fractures.Patients with IT fracture of broken lateral wall and aged more than 18 years,in whom satisfactory reduction was achieved by closed methods,were included in the study.Patients with pathologic or open fractures,polytrauma,prior hip surgery,non-ambulatory prior to surgery,and those who refused to participate were excluded.The operative time,blood loss,radiation exposure,quality of reduction,functional outcome,and union time were evaluated.All data were coded and recorded in Microsoft Excel spread sheet program.SPSS 20.0 was used for data analysis and normality of the continuous data was checked using Kolmogorv Smirnov test.Results:The mean age of patients in the study was 60.3 years.The mean duration of surgery(min),mean intra-operative blood loss(mL)and mean number of exposures were 91.86±12.8(range 70-122),144.8±3.6(range 116-208),and 56.6(range 38-112),respectively.The mean union time was 11.6 weeks and the mean Harris hip score was 94.1.Conclusion:Lateral trochanteric wall in IT fractures is significantly important,and needs to be recon-structed adequately.Nail-plate construct of trochanteric buttress plate fixed with hip screw and anti-rotation screw of proximal femoral nail can be successfully used to augment,fix or buttress the lateral trochanteric wall giving excellent to good results of early union and reduction.
基金Project(No.BAP 2011/76) supported by the Scientific Research Projects Coordination Unit of Kirikkale University,Turkey
文摘An innovative occupant friendly retrofitting technique has been developed for reinforced concrete(RC) building structures with hollow brick infill walls used as partition walls which constitute the major portion of the existing building stock in Turkey. The idea is to convert the existing hollow brick infill wall into a load carrying system acting as a cast-in-place RC wall by reinforcing it with relatively thin concrete plates bonded to the mortar coated infill wall by use of tile adhesive and fixed by 6(6 mm diameter) bolts. Test parameters were the shape and thickness of the plates, presence of reinforcement in plates, number and arrangement of 6 bolts. It was observed that lateral strength, stiffness, energy dissipation capacity, and ductility of the strengthened infill walls were improved and behaviour was enhanced by the proposed technique. Plates with two different basic shapes were used to strengthen the test specimens.
文摘The paper describes the simulation of impact loads applied on plate panels with welding-induced residual stresses and deformation (WSD). Numerical simulations using FEM are carried out to study the influence of welding-induced residual stresses and deformation on the impact strength of plate panels. Welding is simulated using a three dimensional thermal mechanical coupled finite element method. The welding stress and deformation are taken as the initial imperfections in the impact strength analysis and their influence on the behavior of plate panels subjected to impact loadings. The impact loadings from the three directions, the lateral direction and two in-plane directions of the plate panels are studied. Results show a certain reduction in the impact strength due to the existence of welding stress and deformation in the plate panels. It is found that the reduction of impact force is strongly influenced by the welding deformation and the impact directions in the plate panels. This reduction is more significant when the impact force is in the lateral direction.
