Acetabular component revision in the presence of severe bone loss is difficult for reconstructing an acetabular component in the anatomical hip center. Various treatment options are available, although often the aceta...Acetabular component revision in the presence of severe bone loss is difficult for reconstructing an acetabular component in the anatomical hip center. Various treatment options are available, although often the acetabular defect cannot be corrected with a single option alone. Precise assessment of the bone loss and a suitable combination of methods are needed. Here we report a case of multiple failures with impaction bone grafting reconstruction for an acetabular bone defect of American Academy of Orthopedic Surgeons classification type III. We finally reconstructed the acetabulum with three femoral head allografts and a Kerboull-type acetabular reinforcement device. The allograft was a casted, jet-type helmet-like shape. A year later the patient was able to walk without a cane and perform light agricultural work. Accurate evaluation of the acetabular bone loss and appropriate reconstruction is important.展开更多
Objective To investigate the clinical effect of bone graft impaction on posterior intervertebral fusion for lumbar spondylolisthesis.Methods From January 2001 to July 2008,36 patients with lumbar spondylolisthesis wer...Objective To investigate the clinical effect of bone graft impaction on posterior intervertebral fusion for lumbar spondylolisthesis.Methods From January 2001 to July 2008,36 patients with lumbar spondylolisthesis were treated by展开更多
Femoral impaction grafting is a reconstruction option applicable to both simple and complex femoral component revisions. It is one of the preferred techniques for reconstructing large femoral defects when the isthmus ...Femoral impaction grafting is a reconstruction option applicable to both simple and complex femoral component revisions. It is one of the preferred techniques for reconstructing large femoral defects when the isthmus is non-supportive. The available level of evidence is primarily derived from case series, which shows a mean survivorship of 90.5%, with revision or re-operation as the end-point, with an average follow-up of 11 years. The rate of femoral fracture requiring re-operation or revision of the component varies between several large case series, ranging from 2.5% to 9%, with an average of 5.4%.展开更多
Objective To review the choices of allografts for bone defect reconstruction in acetabular revision surgery using the technique of impaction bone grafting.Data sources The data cited in this review were mainly obtaine...Objective To review the choices of allografts for bone defect reconstruction in acetabular revision surgery using the technique of impaction bone grafting.Data sources The data cited in this review were mainly obtained from articles listed in PubMed that were published from January 1993 to July 2009. The search terms were ＂impaction bone grafting＂, ＂particle size＂, ＂mechanical property＂and ＂biological behavior＂.Study selection Articles relevant to the choices of allografts and their results for bone defect reconstruction on the acetabular side were selected.Results Different choices of allografts, including the particle size, process of irradiation or fat reduction, composition and particle grade, are made to improve the survival rate of a prosthesis in acetabular revision surgery. This review,which compares both mechanical and biological factors, summarizes the experimental and clinical results for different techniques.Conclusions Fresh frozen cancellous allografts with particle sizes ranging from 7 to 10 mm are a favorable choice for reconstruction of bone defects of American Academy of Orthopedic Surgeons （AAOS） types Ⅱ （cavitary defect） and Ⅲ（combined cavitary and segmental defect） on the acetabular side. A fat-reducing procedure with saline or solvent/detergent is controversial. Adding autologous marrow into irradiated allografts, which provides reliable mechanical stability and biological safety, may be a substitute for fresh frozen allografts. Cortical bone can be a supplementary material in cases of insufficiency of cancellous allografts. Cartilage should be excluded from the graft material. Further research is required to demonstrate the best particle grade, and randomized controlled trials in clinical practice are required to obtain more information about the selection of allografts.展开更多
Background While attempting to restore bone stock, impaction bone grafting employed during revision joint surgery may result in slow and limited allograft incorporation into host bone. A new approach including gene-mo...Background While attempting to restore bone stock, impaction bone grafting employed during revision joint surgery may result in slow and limited allograft incorporation into host bone. A new approach including gene-modified bone marrow stromal cells （BMSCs） in combination with impaction bone grafting may effectively restore bone stock and improve allograft incorporation. This study aimed to investigate the effect of impaction on gene-modified BMSCs seeded on granular bone allografts in vitro and in vivo.Methods Deep-frozen, granular, cancellous bone allografts from canines were prepared to serve as cell delivery scaffolds and were seeded with green fluorescent protein （GFP） genetically-modified BMSCs to construct cell-allograft composites. The composites were impacted in a simulative, in vitro impaction model and cultured for further analysis under standard conditions. Four Beagle dogs, treated with bilateral, uncemented proximal tibial joint hemiarthroplasty with a prosthesis, were implanted with autologous GFP gene-modified cell-allograft composites to repair the bone cavity around each prosthesis.Results A significant reduction in cell viability was observed after impaction by fluorescence microscopy in vitro.However, there remained a proportion of GFP-positive cells that were viable and functionally active, as evidenced by the secretion of GFP protein in vitro and in vivo.Conclusions Gene-modified BMSCs seeded on granular allografts were able to withstand the impaction forces and to maintain their normal functions in vitro and in vivo, in spite of a partial loss in cell viability.展开更多
背景：已知骨形态发生蛋白2（bone morphogenetic protein2,BMP2）能促进骨愈合,但能否加速股骨头坏死打压植骨术的修复尚不知。目的：回顾性对照分析加入和未加入BMP2的打压植骨术治疗股骨头坏死（osteonecrosis of the femoral head,O...背景：已知骨形态发生蛋白2（bone morphogenetic protein2,BMP2）能促进骨愈合,但能否加速股骨头坏死打压植骨术的修复尚不知。目的：回顾性对照分析加入和未加入BMP2的打压植骨术治疗股骨头坏死（osteonecrosis of the femoral head,ONFH）的疗效。方法：42例（72髋）非创伤性ONFH手术患者获得随访,男19例,女23例;手术时年龄22~54岁,平均30.9岁。手术方法为经髋关节前路,股骨头颈交界处开窗,坏死灶清除,人工骨打压植骨。第一组每例加入4mgrhBMP2,第二组未加。患髋按国际骨循环学会（Association Research Circulation Osseous,ARCO）分期,按中日友好医院（China-Japan Friend-ship Hospital,CJFH）分型。临床疗效按Harris髋关节功能评分（Harris hip score,HHS）评定,影像学按股骨头是否塌陷及病灶修复情况评定。结果：随访5~7.8年（平均6.1年）。优36髋,良12髋,尚可7髋。股骨头保存率76.4%,第一组为81.8%,第二组为71.8%（P=0.459）。ARCOⅡ期为90.3%,Ⅲa期为34.6%（P=0.0285）;CJFH-C型及L1型为95.3%,L3型为29.6%（P=0.050）。结论：经股骨头颈开窗病灶清除,打压植骨术在选择合适的非创伤ONFH患者（ARCOⅡb,c期及CJFHC型和L1型）可获得优良的中期疗效。加入rhBMP2可提高手术疗效和骨修复质量。展开更多
文摘Acetabular component revision in the presence of severe bone loss is difficult for reconstructing an acetabular component in the anatomical hip center. Various treatment options are available, although often the acetabular defect cannot be corrected with a single option alone. Precise assessment of the bone loss and a suitable combination of methods are needed. Here we report a case of multiple failures with impaction bone grafting reconstruction for an acetabular bone defect of American Academy of Orthopedic Surgeons classification type III. We finally reconstructed the acetabulum with three femoral head allografts and a Kerboull-type acetabular reinforcement device. The allograft was a casted, jet-type helmet-like shape. A year later the patient was able to walk without a cane and perform light agricultural work. Accurate evaluation of the acetabular bone loss and appropriate reconstruction is important.
文摘Objective To investigate the clinical effect of bone graft impaction on posterior intervertebral fusion for lumbar spondylolisthesis.Methods From January 2001 to July 2008,36 patients with lumbar spondylolisthesis were treated by
文摘Femoral impaction grafting is a reconstruction option applicable to both simple and complex femoral component revisions. It is one of the preferred techniques for reconstructing large femoral defects when the isthmus is non-supportive. The available level of evidence is primarily derived from case series, which shows a mean survivorship of 90.5%, with revision or re-operation as the end-point, with an average follow-up of 11 years. The rate of femoral fracture requiring re-operation or revision of the component varies between several large case series, ranging from 2.5% to 9%, with an average of 5.4%.
文摘Objective To review the choices of allografts for bone defect reconstruction in acetabular revision surgery using the technique of impaction bone grafting.Data sources The data cited in this review were mainly obtained from articles listed in PubMed that were published from January 1993 to July 2009. The search terms were ＂impaction bone grafting＂, ＂particle size＂, ＂mechanical property＂and ＂biological behavior＂.Study selection Articles relevant to the choices of allografts and their results for bone defect reconstruction on the acetabular side were selected.Results Different choices of allografts, including the particle size, process of irradiation or fat reduction, composition and particle grade, are made to improve the survival rate of a prosthesis in acetabular revision surgery. This review,which compares both mechanical and biological factors, summarizes the experimental and clinical results for different techniques.Conclusions Fresh frozen cancellous allografts with particle sizes ranging from 7 to 10 mm are a favorable choice for reconstruction of bone defects of American Academy of Orthopedic Surgeons （AAOS） types Ⅱ （cavitary defect） and Ⅲ（combined cavitary and segmental defect） on the acetabular side. A fat-reducing procedure with saline or solvent/detergent is controversial. Adding autologous marrow into irradiated allografts, which provides reliable mechanical stability and biological safety, may be a substitute for fresh frozen allografts. Cortical bone can be a supplementary material in cases of insufficiency of cancellous allografts. Cartilage should be excluded from the graft material. Further research is required to demonstrate the best particle grade, and randomized controlled trials in clinical practice are required to obtain more information about the selection of allografts.
基金This work was supported by grants from Shanghai Natural Science Foundation （No. 08ZR1413000）, Shanghai Key Laboratory of Orthopaedic Implant Foundation （No. 08Dz2230300） and Shanghai Education Committee Foundation （No. J50206）.
文摘Background While attempting to restore bone stock, impaction bone grafting employed during revision joint surgery may result in slow and limited allograft incorporation into host bone. A new approach including gene-modified bone marrow stromal cells （BMSCs） in combination with impaction bone grafting may effectively restore bone stock and improve allograft incorporation. This study aimed to investigate the effect of impaction on gene-modified BMSCs seeded on granular bone allografts in vitro and in vivo.Methods Deep-frozen, granular, cancellous bone allografts from canines were prepared to serve as cell delivery scaffolds and were seeded with green fluorescent protein （GFP） genetically-modified BMSCs to construct cell-allograft composites. The composites were impacted in a simulative, in vitro impaction model and cultured for further analysis under standard conditions. Four Beagle dogs, treated with bilateral, uncemented proximal tibial joint hemiarthroplasty with a prosthesis, were implanted with autologous GFP gene-modified cell-allograft composites to repair the bone cavity around each prosthesis.Results A significant reduction in cell viability was observed after impaction by fluorescence microscopy in vitro.However, there remained a proportion of GFP-positive cells that were viable and functionally active, as evidenced by the secretion of GFP protein in vitro and in vivo.Conclusions Gene-modified BMSCs seeded on granular allografts were able to withstand the impaction forces and to maintain their normal functions in vitro and in vivo, in spite of a partial loss in cell viability.
文摘背景：已知骨形态发生蛋白2（bone morphogenetic protein2,BMP2）能促进骨愈合,但能否加速股骨头坏死打压植骨术的修复尚不知。目的：回顾性对照分析加入和未加入BMP2的打压植骨术治疗股骨头坏死（osteonecrosis of the femoral head,ONFH）的疗效。方法：42例（72髋）非创伤性ONFH手术患者获得随访,男19例,女23例;手术时年龄22~54岁,平均30.9岁。手术方法为经髋关节前路,股骨头颈交界处开窗,坏死灶清除,人工骨打压植骨。第一组每例加入4mgrhBMP2,第二组未加。患髋按国际骨循环学会（Association Research Circulation Osseous,ARCO）分期,按中日友好医院（China-Japan Friend-ship Hospital,CJFH）分型。临床疗效按Harris髋关节功能评分（Harris hip score,HHS）评定,影像学按股骨头是否塌陷及病灶修复情况评定。结果：随访5~7.8年（平均6.1年）。优36髋,良12髋,尚可7髋。股骨头保存率76.4%,第一组为81.8%,第二组为71.8%（P=0.459）。ARCOⅡ期为90.3%,Ⅲa期为34.6%（P=0.0285）;CJFH-C型及L1型为95.3%,L3型为29.6%（P=0.050）。结论：经股骨头颈开窗病灶清除,打压植骨术在选择合适的非创伤ONFH患者（ARCOⅡb,c期及CJFHC型和L1型）可获得优良的中期疗效。加入rhBMP2可提高手术疗效和骨修复质量。
