目的:研究股骨颈轴向控制髓内钉(axial controlled intramedullary nail of thefemoral neck,即ACINFN钉)的生物力学性能,为临床应用提供力学依据.方法:24具新鲜尸体股骨标本随机分为对照组和两个实验组.对照组不作任何处理;实验组制成E...目的:研究股骨颈轴向控制髓内钉(axial controlled intramedullary nail of thefemoral neck,即ACINFN钉)的生物力学性能,为临床应用提供力学依据.方法:24具新鲜尸体股骨标本随机分为对照组和两个实验组.对照组不作任何处理;实验组制成EvansⅠ型粗隆间骨折模型,分别用材料、规格相同的ACINFN钉和A-P型GAMMA钉固定.各组均在双轴液压伺服生物材料测试实验机上做抗压和抗扭转实验.结果:在300N的压力下,对照组、ACINFN钉组和A-P型GAMMA钉组的压缩刚度分别为(1568.06±365.81)、(1166.53±91.8)和(224.11±66.45)N/mm,差异有显著性意义(P＜0.01);扭角为5°时,对照组、ACINFN钉组和A-P型GAMMA钉组的扭转刚度分别为(1.14±0.19)、(1.076±0.125)和(0.114±0.065)N@m/deg,差异有显著性意义(P＜0.01).结论:ACINFN钉在抗压和抗扭转性能方面明显优于A-P型GAMMA钉,具有良好的生物力学性能.展开更多
OBJECTIVE:To investigate the relationship between gene polymorphism of peroxisome proliferator-activated receptor(PPAR) and susceptibility to northwest dryness syndrome(NDS).METHODS:The polymorphisms of 11 PPARl51, r...OBJECTIVE:To investigate the relationship between gene polymorphism of peroxisome proliferator-activated receptor(PPAR) and susceptibility to northwest dryness syndrome(NDS).METHODS:The polymorphisms of 11 PPARl51, rs13γ7 gene oci rs10510418, rs1263353640,rs17036188, rs2921190, rs4135247, rs4135275,rs4135283, rs6768587, rs709156, and rs7615916 were detected in 249 patients with NDS and 260 patients with non-NDS(control group) by using Snapshot single-nucleotide polymorphism typing technology.RESULTS:All locus detections were in accordance with Hardy-Weinberg equilibrium test.Compared with the control group, rs2921190 genotype frequency showed statistical difference in the NDS group(P < 0.05).Two-two comparison result showed that CC genotype frequency in the NDS group was higher than that in the control group.CT and TT genotype distribution frequencies showed differences between the two groups.The rare allele frequency in the NDS group was lower than that of the control group(P < 0.01).Multi-factor logistic regression analysis showed that the age and genotype entered the regression equation.The subjects in the age bracket 30-55 and 45-45 were1.796 and 1.561 times likely, respectively, than those in other age brackets to contract NDS,.The patients with CC genotype was only 0.524 times likely than those with CT/TT genotype to suffer from NDS.CONCLUSION:PPARsm was correlated γw gene rs2921190 polymorphiith the susceptibility to NDS.展开更多
文摘目的:研究股骨颈轴向控制髓内钉(axial controlled intramedullary nail of thefemoral neck,即ACINFN钉)的生物力学性能,为临床应用提供力学依据.方法:24具新鲜尸体股骨标本随机分为对照组和两个实验组.对照组不作任何处理;实验组制成EvansⅠ型粗隆间骨折模型,分别用材料、规格相同的ACINFN钉和A-P型GAMMA钉固定.各组均在双轴液压伺服生物材料测试实验机上做抗压和抗扭转实验.结果:在300N的压力下,对照组、ACINFN钉组和A-P型GAMMA钉组的压缩刚度分别为(1568.06±365.81)、(1166.53±91.8)和(224.11±66.45)N/mm,差异有显著性意义(P＜0.01);扭角为5°时,对照组、ACINFN钉组和A-P型GAMMA钉组的扭转刚度分别为(1.14±0.19)、(1.076±0.125)和(0.114±0.065)N@m/deg,差异有显著性意义(P＜0.01).结论:ACINFN钉在抗压和抗扭转性能方面明显优于A-P型GAMMA钉,具有良好的生物力学性能.
基金Supported by Project of National Natural Science Foundation of China(2013,On the Correlation Between the Northwest Dryness Syndrome and Metabolic Syndrome and It's Relationship with PPARs Gene,No.81260518)
文摘OBJECTIVE:To investigate the relationship between gene polymorphism of peroxisome proliferator-activated receptor(PPAR) and susceptibility to northwest dryness syndrome(NDS).METHODS:The polymorphisms of 11 PPARl51, rs13γ7 gene oci rs10510418, rs1263353640,rs17036188, rs2921190, rs4135247, rs4135275,rs4135283, rs6768587, rs709156, and rs7615916 were detected in 249 patients with NDS and 260 patients with non-NDS(control group) by using Snapshot single-nucleotide polymorphism typing technology.RESULTS:All locus detections were in accordance with Hardy-Weinberg equilibrium test.Compared with the control group, rs2921190 genotype frequency showed statistical difference in the NDS group(P < 0.05).Two-two comparison result showed that CC genotype frequency in the NDS group was higher than that in the control group.CT and TT genotype distribution frequencies showed differences between the two groups.The rare allele frequency in the NDS group was lower than that of the control group(P < 0.01).Multi-factor logistic regression analysis showed that the age and genotype entered the regression equation.The subjects in the age bracket 30-55 and 45-45 were1.796 and 1.561 times likely, respectively, than those in other age brackets to contract NDS,.The patients with CC genotype was only 0.524 times likely than those with CT/TT genotype to suffer from NDS.CONCLUSION:PPARsm was correlated γw gene rs2921190 polymorphiith the susceptibility to NDS.
