CAJ | 학술논문

目的探讨人工关节超高分子量聚乙烯(UHMWPE)采用γ射线辐照交联及热处理的最佳条件.方法将医用UHMWPE材料用不同剂量γ射线辐照并热处理,制备成髋关节内衬和膝关节垫片,进行摩擦磨损测试,并进行理化性能评估,依据测试结果筛选出最佳辐照交联改性方案.结果以75 kGy剂量辐照,在150℃热处理后的UHMWPE样品磨损率最低,与未经处理的材料相比,改性后的髋臼磨损率平均降低了63.24％、膝关节垫片磨损率平均降低了59.95％.同时此改性后的UHMWPE材料具有良好的机械性能,冲击强度为83 kJ/m2、拉伸强度50.32 mPa、屈服强度21.83 mPa、断裂伸长率312％.此外,改性后的材料还具有较好的抗疲劳性能和可靠的化学性能.结论以75 kGy剂量的γ射线辐照,在150℃下热处理,为人工关节超高分子聚乙烯交联改性的最佳条件.
목적 탐토인공관절초고분자량취을희(UHMWPE)채용γ사선복조교련급열처리적최가조건.방법 장의용UHMWPE재료용불동제량γ사선복조병열처리,제비성관관절내츤화슬관절점편,진행마찰마손측시,병진행이화성능평고,의거측시결과사선출최가복조교련개성방안.결과 이75 kGy제량복조,재150℃열처리후적UHMWPE양품마손솔최저,여미경처리적재료상비,개성후적관구마손솔평균강저료63.24％、슬관절점편마손솔평균강저료59.95％.동시차개성후적UHMWPE재료구유량호적궤계성능,충격강도위83 kJ/m2、랍신강도50.32 mPa、굴복강도21.83 mPa、단렬신장솔312％.차외,개성후적재료환구유교호적항피로성능화가고적화학성능.결론 이75 kGy제량적γ사선복조,재150℃하열처리,위인공관절초고분자취을희교련개성적최가조건.
Objective To explore the optimal condition of crosslinking modification of ultra high molecular weight polyethylene (UHMWPE) by gamma ray irradiation.Methods The hip and knee joint samples of UHMWPE were tested with regards to friction and wear performance at different doses of 60Co radiation and heat treatment.And the optimal condition of crosslinking was determined by wear performance and physicochemical properties.Results Under the condition of 75 kGy irradiation and 150 ℃ heat treatment,crosslinked UHMWPE showed the best performance.Acetabular sample wear rate decreased 63.24％ and knee sample wear rate decreased 59.95％ compared with conventional UHMWPE.The modified material had excellent mechanical properties of impact strength 83 kJ/m2,tensile strength 50.32 MPa,yield strength 21.83 MPa and elongation at break 312％.Also the material showed excellent antifatigue and reliable chemical properties.Conclusion The optimal condition of crosslinking modification of UHMWPE is 75 kGy irradiation after 150 ℃ heat treatment.