背景:陶瓷-陶瓷界面因低磨损而被重视,但其也伴随着异响和破裂的风险。因此目前对陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的应用仍存在较多争议。目的:通过Meta分析评价陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的疗效...背景:陶瓷-陶瓷界面因低磨损而被重视,但其也伴随着异响和破裂的风险。因此目前对陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的应用仍存在较多争议。目的:通过Meta分析评价陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的疗效和安全性。方法:计算机检索Pub Med/Medline、Embase、Web of Science、Cochrane协作网数据库、中国生物医学文献数据库(CBMdisc)和中文期刊全文数据库(CNKI)。全面收集2015年1月前发表的比较陶瓷-陶瓷界面和陶瓷-聚乙烯界面全髋关节置换疗效和安全性的随机对照试验,并追溯纳入研究的参考文献。严格按照纳入与排除标准筛选文献、提取资料并进行质量评价,采用Rev Man 5.2进行Meta分析。结果与结论:共9个临床随机对照试验纳入研究,其中陶瓷-陶瓷界面人工关节1 231髋,陶瓷-聚乙烯界面人工关节932髋。Meta分析结果发现,陶瓷-陶瓷和陶瓷-聚乙烯人工关节均能明显改善关节功能;陶瓷-陶瓷人工关节有着较高的术中、术后假体破裂率和异响发生率,陶瓷-聚乙烯人工关节则假体磨损速度更快;但在短-中期随访中,关节脱位、骨溶解、假体松动等置换相关并发症和各原因导致的假体翻修率在两组间差异并无显著性意义。提示陶瓷-陶瓷和陶瓷-聚乙烯全髋关节假体的修复效果和安全性在短-中期随访中并无明显差异,但其二者远期效果仍有待观察。展开更多
全髋关节置换术(total hip arthroplasty,THA)是治疗髋关节疾病、重新建立关节功能的有效方法,已经在临床上取得了巨大成功。因为陶瓷材料具有生物惰性,使它在髋关节置换手术中可以有效减少因关节界面磨损而引起的人工髋关节松动、下沉...全髋关节置换术(total hip arthroplasty,THA)是治疗髋关节疾病、重新建立关节功能的有效方法,已经在临床上取得了巨大成功。因为陶瓷材料具有生物惰性,使它在髋关节置换手术中可以有效减少因关节界面磨损而引起的人工髋关节松动、下沉等并发症,使陶瓷人工假体成为了人工关节置换术中不可或缺的主要材料。然而关于陶瓷-陶瓷(ceramic-on-ceramic,COC)人工髋关节置换术后会出现髋关节异响和假体碎裂的问题,引起了关节外科领域学者的广泛关注。该文重点从COC材料在THA中的应用进展、优势及存在的弊端进行综述。展开更多
目的总结第4代陶瓷界面在全髋关节置换术(total hip arthroplasty,THA)中的应用和临床随访(平均10个月)的结果。方法对2010年4月至2011年12月期间复旦大学附属中山医院骨科收治的35例不同髋关节疾病患者应用第4代Delta大直径陶瓷-陶瓷...目的总结第4代陶瓷界面在全髋关节置换术(total hip arthroplasty,THA)中的应用和临床随访(平均10个月)的结果。方法对2010年4月至2011年12月期间复旦大学附属中山医院骨科收治的35例不同髋关节疾病患者应用第4代Delta大直径陶瓷-陶瓷股骨头假体系统行人工THA,采用Harris评分系统进行术前、术后髋关节功能评估,总结临床应用经验和术后并发症等情况。结果对35例实施第4代陶瓷界面THA手术的患者进行疗效随访,21例获随访,男8例,女13例,平均年龄(55.3±21.4)岁(28～77岁),平均随访时间(9.7±7.2)个月(2～22个月),平均术后Harris髋关节评分87.9分。结论在THA中应用第4代陶瓷界面平均10个月以上的早期临床疗效满意。展开更多
The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data.The results show that there is an opt...The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data.The results show that there is an optimum porosity of 0.32 to get a higher efficiency and lower pressure drop during filtration.According to the results of simulation and experiment,it is evident that lower inlet velocity can maintain lower pressure drop and obtain higher collection efficiency and inlet concentration also has a crucial influence on the collection efficiency.The collection efficiency of equipment increases significantly with the increase of inlet concentration when the inlet concentration is less than 6.3 g/m3,but it gradually tends to be stable in the range of 97.3%-99.7%when the inlet concentration is over this concentration.展开更多
The effects of ZrO2 on the crystallinity of mica and microstructure of a machina- ble glassceramic were studied. It was found that ZrO2 is an effective nucleation agent in mica glass- ceramics. Stabilized by Ca2+, a l...The effects of ZrO2 on the crystallinity of mica and microstructure of a machina- ble glassceramic were studied. It was found that ZrO2 is an effective nucleation agent in mica glass- ceramics. Stabilized by Ca2+, a lot of t--ZrO2 particles precipitate from ZrO2-mica glass-ceramics. The ZrO2 particles can effectively limit the growth of mica crystal and benefit the mechanical properties of glass-ceramics.展开更多
文摘背景:陶瓷-陶瓷界面因低磨损而被重视,但其也伴随着异响和破裂的风险。因此目前对陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的应用仍存在较多争议。目的:通过Meta分析评价陶瓷-陶瓷界面和陶瓷-聚乙烯界面在全髋关节置换中的疗效和安全性。方法:计算机检索Pub Med/Medline、Embase、Web of Science、Cochrane协作网数据库、中国生物医学文献数据库(CBMdisc)和中文期刊全文数据库(CNKI)。全面收集2015年1月前发表的比较陶瓷-陶瓷界面和陶瓷-聚乙烯界面全髋关节置换疗效和安全性的随机对照试验,并追溯纳入研究的参考文献。严格按照纳入与排除标准筛选文献、提取资料并进行质量评价,采用Rev Man 5.2进行Meta分析。结果与结论:共9个临床随机对照试验纳入研究,其中陶瓷-陶瓷界面人工关节1 231髋,陶瓷-聚乙烯界面人工关节932髋。Meta分析结果发现,陶瓷-陶瓷和陶瓷-聚乙烯人工关节均能明显改善关节功能;陶瓷-陶瓷人工关节有着较高的术中、术后假体破裂率和异响发生率,陶瓷-聚乙烯人工关节则假体磨损速度更快;但在短-中期随访中,关节脱位、骨溶解、假体松动等置换相关并发症和各原因导致的假体翻修率在两组间差异并无显著性意义。提示陶瓷-陶瓷和陶瓷-聚乙烯全髋关节假体的修复效果和安全性在短-中期随访中并无明显差异,但其二者远期效果仍有待观察。
文摘全髋关节置换术(total hip arthroplasty,THA)是治疗髋关节疾病、重新建立关节功能的有效方法,已经在临床上取得了巨大成功。因为陶瓷材料具有生物惰性,使它在髋关节置换手术中可以有效减少因关节界面磨损而引起的人工髋关节松动、下沉等并发症,使陶瓷人工假体成为了人工关节置换术中不可或缺的主要材料。然而关于陶瓷-陶瓷(ceramic-on-ceramic,COC)人工髋关节置换术后会出现髋关节异响和假体碎裂的问题,引起了关节外科领域学者的广泛关注。该文重点从COC材料在THA中的应用进展、优势及存在的弊端进行综述。
文摘目的总结第4代陶瓷界面在全髋关节置换术(total hip arthroplasty,THA)中的应用和临床随访(平均10个月)的结果。方法对2010年4月至2011年12月期间复旦大学附属中山医院骨科收治的35例不同髋关节疾病患者应用第4代Delta大直径陶瓷-陶瓷股骨头假体系统行人工THA,采用Harris评分系统进行术前、术后髋关节功能评估,总结临床应用经验和术后并发症等情况。结果对35例实施第4代陶瓷界面THA手术的患者进行疗效随访,21例获随访,男8例,女13例,平均年龄(55.3±21.4)岁(28～77岁),平均随访时间(9.7±7.2)个月(2～22个月),平均术后Harris髋关节评分87.9分。结论在THA中应用第4代陶瓷界面平均10个月以上的早期临床疗效满意。
基金Project(50878080)supported by the National Natural Science Foundation of ChinaProject(K0902006-31)supported by the Key Scientific and Technological Special of Changsha City in China
文摘The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data.The results show that there is an optimum porosity of 0.32 to get a higher efficiency and lower pressure drop during filtration.According to the results of simulation and experiment,it is evident that lower inlet velocity can maintain lower pressure drop and obtain higher collection efficiency and inlet concentration also has a crucial influence on the collection efficiency.The collection efficiency of equipment increases significantly with the increase of inlet concentration when the inlet concentration is less than 6.3 g/m3,but it gradually tends to be stable in the range of 97.3%-99.7%when the inlet concentration is over this concentration.
基金the Trans-Century Training Program Foundation for the Talents by the Ministry of Education of China the National Natural Science Foundation of China (No. 50172010) and Natural Science Foundation of Liaoning Province (No. 20
文摘The effects of ZrO2 on the crystallinity of mica and microstructure of a machina- ble glassceramic were studied. It was found that ZrO2 is an effective nucleation agent in mica glass- ceramics. Stabilized by Ca2+, a lot of t--ZrO2 particles precipitate from ZrO2-mica glass-ceramics. The ZrO2 particles can effectively limit the growth of mica crystal and benefit the mechanical properties of glass-ceramics.
