Bone graft substitutes are widely-studied as alternatives to bone grafts in the clinic. The currently available products are mostly ceramics and polymers. Considerable progress has been made in the study of the biodeg...Bone graft substitutes are widely-studied as alternatives to bone grafts in the clinic. The currently available products are mostly ceramics and polymers. Considerable progress has been made in the study of the biodegradable magnesium alloys, which possess the necessary attributions of a suitable substitute, including an excellent mechanical property. In the present study, a minipig model of a lateral tibial plateau defect was used to evaluate the effectiveness of a magnesium alloy in the repair of a critical-sized defect. The micro-arc oxidation (MAO)-coated ZK60 alloy tablets and medical-grade calcium sulfate pellets were used as the test and control materials, respectively. Bone morphology was monitored by computed tomography after the implantation for 2 and 4 months. It was found that the bone morphology in minipigs following magnesium treatment was similar to that of the normal bone, whereas an abnormal and concave morphology was displayed following the calcium sulfate treatment. The average bone healing rate for the magnesium-treated defects was higher than that of the calcium sulfate-treated defects at the first 4 months following the implantation. Overall, magnesium treatment appeared to calcium sulfate treatment. Thus, the MAO-coated ZK60 al substitute, and further research on its biological activity in improve the defect repair as compared with the oy appears to be a useful biocompatible bone graft vivo is needed.展开更多
目的探讨髁限制性膝关节假体在膝骨关节炎严重内翻畸形合并胫骨平台内侧骨缺损行全膝关节置换术中的应用及疗效观察。方法回顾分析2008年1月至2011年1月12例骨性关节炎严重膝内翻畸形合并胫骨平台内侧骨缺损行髁限制性膝关节假体全膝关...目的探讨髁限制性膝关节假体在膝骨关节炎严重内翻畸形合并胫骨平台内侧骨缺损行全膝关节置换术中的应用及疗效观察。方法回顾分析2008年1月至2011年1月12例骨性关节炎严重膝内翻畸形合并胫骨平台内侧骨缺损行髁限制性膝关节假体全膝关节置换术患者资料,术前负重位膝内翻畸形平均34°,胫骨平台内侧骨缺损为非包容性,依据AORI分型为Ⅱ、Ⅲ型,采用美国膝关节学会评分(knee society score,KSS)系统评估膝关节功能,包括膝评分和膝功能评分。结果本组均获随访,随访6~18个月,平均13个月,KSS膝评分和膝功能评分从术前(19.5±4.2)分、(16.2±5.4)分提高到术后(87.7±5.6)分、(85.4±8.3)分,分析术前及术后KSS膝评分及膝功能评分的差异有统计学意义。结论髁限制性膝关节假体全膝关节置换是治疗膝骨关节炎严重内翻畸形合并胫骨平台内侧骨缺损的有效方法,术中采取适度的软组织松解及正确的截骨,针对胫骨平台内侧骨缺损选用组合式金属垫块及假体延长柄,适度增加关节的限制性,可以转移力学负荷,增加假体的稳定性,最终获得良好效果。展开更多
目的观察利用初次全膝关节置换术中截骨获得的自体骨植骨的方式修复胫骨平台内侧包容性骨缺损的近期疗效。方法选取2012年9月-2013年12月9例(10膝)膝骨关节炎合并内侧胫骨平台包容性骨缺损行全膝关节置换术患者。胫骨平台骨缺损采用...目的观察利用初次全膝关节置换术中截骨获得的自体骨植骨的方式修复胫骨平台内侧包容性骨缺损的近期疗效。方法选取2012年9月-2013年12月9例(10膝)膝骨关节炎合并内侧胫骨平台包容性骨缺损行全膝关节置换术患者。胫骨平台骨缺损采用自体骨植骨的方式修复,常规骨水泥固定胫骨假体,缺损的植骨部位完全覆盖于假体下。结果随访时间3月-2年,平均1.4年,HSS(Hospital for special surgery,HSS)膝关节评分由术前36.7(31-54)分,提高到84.7(76-94)分。术后X线片显示胫骨骨缺损得到有效修复,假体下方无骨质缺损表现。近期随访无感染征象,X线片未见假体松动、植骨块移位及吸收。结论自体骨植骨可有效的修复全膝关节置换术中胫骨平台内侧包容性骨缺损。展开更多
目的探讨胫骨平台骨折术后不同程度感染性骨缺损治疗策略的选择。方法回顾性分析2014年7月至2018年2月我院收治的45例胫骨平台骨折术后感染性骨缺损病人的临床资料,其中男32例,女13例,年龄为(39.42±12.09)岁(20~66岁)。腔洞性骨缺...目的探讨胫骨平台骨折术后不同程度感染性骨缺损治疗策略的选择。方法回顾性分析2014年7月至2018年2月我院收治的45例胫骨平台骨折术后感染性骨缺损病人的临床资料,其中男32例,女13例,年龄为(39.42±12.09)岁(20~66岁)。腔洞性骨缺损16例,节段性骨缺损16例,波及关节面的缺损13例。Ⅰ型为胫骨平台内腔洞性骨缺损;Ⅱa型为胫骨平台下节段性(<4 cm)并平台内腔洞性骨缺损;Ⅱb型胫骨平台下节段性(≥4 cm)并平台内腔洞性骨缺损;Ⅲa型胫骨平台波及关节面的缺损,但节段性缺损<4 cm;Ⅲb型为胫骨平台波及关节面的缺损,但节段性缺损≥4 cm。所有病人一期彻底扩创取出内固定,二期按照胫骨平台骨缺损情况进行分型治疗。记录病人一期手术前、二期手术后3个月的炎性指标(白细胞计数、C-反应蛋白、红细胞沉降率和降钙素原)、膝关节活动度、美国特种外科医院(Hospital for Special Surgery,HSS)膝关节评分,及术后并发症、骨折愈合情况。结果病人随访时间为(25.25±3.32)个月(17~56个月),骨折愈合时间为(11.21±4.43)个月(8~17个月),伤口愈合较满意,其中8例行腓肠肌肌瓣转移术覆盖伤口,10例行同侧大腿取皮局部植皮术,1例节段性骨缺损术后10个月骨折未见明显愈合,再次手术植骨后6个月得到愈合。随访2年未见伤口破溃及感染复发。在观察期间未见固定失败、再骨折、神经损伤、下肢深静脉血栓、肺栓塞等并发症的发生。二期术后3个月各炎性指标、膝关节活动度、HSS评分与一期术前比较,差异均有统计学意义(P均<0.05)。末次随访时,病人患膝HSS评分为(89.23±5.35)分(82~94分)。结论根据胫骨平台术后感染性骨缺损进行分型治疗,临床疗效良好,为胫骨平台术后感染性骨缺损诊疗提供了策略。展开更多
基金the financial support of National Basic Research Program of China(973 Program,No.2012CB 619101)the National Natural Science Foundation of China (Nos.30970715 and 81101387)
文摘Bone graft substitutes are widely-studied as alternatives to bone grafts in the clinic. The currently available products are mostly ceramics and polymers. Considerable progress has been made in the study of the biodegradable magnesium alloys, which possess the necessary attributions of a suitable substitute, including an excellent mechanical property. In the present study, a minipig model of a lateral tibial plateau defect was used to evaluate the effectiveness of a magnesium alloy in the repair of a critical-sized defect. The micro-arc oxidation (MAO)-coated ZK60 alloy tablets and medical-grade calcium sulfate pellets were used as the test and control materials, respectively. Bone morphology was monitored by computed tomography after the implantation for 2 and 4 months. It was found that the bone morphology in minipigs following magnesium treatment was similar to that of the normal bone, whereas an abnormal and concave morphology was displayed following the calcium sulfate treatment. The average bone healing rate for the magnesium-treated defects was higher than that of the calcium sulfate-treated defects at the first 4 months following the implantation. Overall, magnesium treatment appeared to calcium sulfate treatment. Thus, the MAO-coated ZK60 al substitute, and further research on its biological activity in improve the defect repair as compared with the oy appears to be a useful biocompatible bone graft vivo is needed.
文摘目的探讨髁限制性膝关节假体在膝骨关节炎严重内翻畸形合并胫骨平台内侧骨缺损行全膝关节置换术中的应用及疗效观察。方法回顾分析2008年1月至2011年1月12例骨性关节炎严重膝内翻畸形合并胫骨平台内侧骨缺损行髁限制性膝关节假体全膝关节置换术患者资料,术前负重位膝内翻畸形平均34°,胫骨平台内侧骨缺损为非包容性,依据AORI分型为Ⅱ、Ⅲ型,采用美国膝关节学会评分(knee society score,KSS)系统评估膝关节功能,包括膝评分和膝功能评分。结果本组均获随访,随访6~18个月,平均13个月,KSS膝评分和膝功能评分从术前(19.5±4.2)分、(16.2±5.4)分提高到术后(87.7±5.6)分、(85.4±8.3)分,分析术前及术后KSS膝评分及膝功能评分的差异有统计学意义。结论髁限制性膝关节假体全膝关节置换是治疗膝骨关节炎严重内翻畸形合并胫骨平台内侧骨缺损的有效方法,术中采取适度的软组织松解及正确的截骨,针对胫骨平台内侧骨缺损选用组合式金属垫块及假体延长柄,适度增加关节的限制性,可以转移力学负荷,增加假体的稳定性,最终获得良好效果。
文摘目的观察利用初次全膝关节置换术中截骨获得的自体骨植骨的方式修复胫骨平台内侧包容性骨缺损的近期疗效。方法选取2012年9月-2013年12月9例(10膝)膝骨关节炎合并内侧胫骨平台包容性骨缺损行全膝关节置换术患者。胫骨平台骨缺损采用自体骨植骨的方式修复,常规骨水泥固定胫骨假体,缺损的植骨部位完全覆盖于假体下。结果随访时间3月-2年,平均1.4年,HSS(Hospital for special surgery,HSS)膝关节评分由术前36.7(31-54)分,提高到84.7(76-94)分。术后X线片显示胫骨骨缺损得到有效修复,假体下方无骨质缺损表现。近期随访无感染征象,X线片未见假体松动、植骨块移位及吸收。结论自体骨植骨可有效的修复全膝关节置换术中胫骨平台内侧包容性骨缺损。
文摘目的探讨胫骨平台骨折术后不同程度感染性骨缺损治疗策略的选择。方法回顾性分析2014年7月至2018年2月我院收治的45例胫骨平台骨折术后感染性骨缺损病人的临床资料,其中男32例,女13例,年龄为(39.42±12.09)岁(20~66岁)。腔洞性骨缺损16例,节段性骨缺损16例,波及关节面的缺损13例。Ⅰ型为胫骨平台内腔洞性骨缺损;Ⅱa型为胫骨平台下节段性(<4 cm)并平台内腔洞性骨缺损;Ⅱb型胫骨平台下节段性(≥4 cm)并平台内腔洞性骨缺损;Ⅲa型胫骨平台波及关节面的缺损,但节段性缺损<4 cm;Ⅲb型为胫骨平台波及关节面的缺损,但节段性缺损≥4 cm。所有病人一期彻底扩创取出内固定,二期按照胫骨平台骨缺损情况进行分型治疗。记录病人一期手术前、二期手术后3个月的炎性指标(白细胞计数、C-反应蛋白、红细胞沉降率和降钙素原)、膝关节活动度、美国特种外科医院(Hospital for Special Surgery,HSS)膝关节评分,及术后并发症、骨折愈合情况。结果病人随访时间为(25.25±3.32)个月(17~56个月),骨折愈合时间为(11.21±4.43)个月(8~17个月),伤口愈合较满意,其中8例行腓肠肌肌瓣转移术覆盖伤口,10例行同侧大腿取皮局部植皮术,1例节段性骨缺损术后10个月骨折未见明显愈合,再次手术植骨后6个月得到愈合。随访2年未见伤口破溃及感染复发。在观察期间未见固定失败、再骨折、神经损伤、下肢深静脉血栓、肺栓塞等并发症的发生。二期术后3个月各炎性指标、膝关节活动度、HSS评分与一期术前比较,差异均有统计学意义(P均<0.05)。末次随访时,病人患膝HSS评分为(89.23±5.35)分(82~94分)。结论根据胫骨平台术后感染性骨缺损进行分型治疗,临床疗效良好,为胫骨平台术后感染性骨缺损诊疗提供了策略。