[目的]探讨全角度复位固定治疗小粗隆二分型难复性股骨粗隆间骨折(irreducible intertrochanteric fractures of the femur,IRIFF)的临床疗效。[方法]2020年1月—2022年12月18例小粗隆二分型IRIFF患者,采用冠状位钳夹联合矢状位撬拨全...[目的]探讨全角度复位固定治疗小粗隆二分型难复性股骨粗隆间骨折(irreducible intertrochanteric fractures of the femur,IRIFF)的临床疗效。[方法]2020年1月—2022年12月18例小粗隆二分型IRIFF患者,采用冠状位钳夹联合矢状位撬拨全角度辅助复位髓内钉内固定治疗。评价临床及影像结果。[结果]本组患者手术时间(39.7±7.0)min,术中出血量(124.7±50.0)mL。患者均获(11.7±2.1)个月随访。1例因头钉切割行半髋关节置换。随术前,术后4周和末次随访的时间推移,VAS评分[(6.4±1.1),(2.8±1.5),(0.7±1.1),P<0.001]、髋关节Harris评分[(37.9±8.3),(71.6±10.8),(92.7±10.3),P<0.001]、髋伸屈ROM[(5.3±4.4)°,(67.4±13.0)°,(97.2±13.0)°,P<0.001]均显著改善。影像方面,与术前相比,术后4个月及末次随访时,患髋关节颈干角[(76.5±8.2)°,(129.1±4.9)°,(125.1±7.0)°,P<0.001]显著增大,与术后4周相比,末次随访时,尖顶距无显著变化(P>0.05),17例患者骨折一期愈合,骨折愈合时间为(6.6±1.5)个月。[结论]全角度辅助复位技术内固定治疗小粗隆二分型IRIFF,复位固定满意,临床疗效确切。展开更多
A robust generalized continuum model called the wavelength-dependent strain gradient continuum model(WDSGM)has been proposed to predict dispersion properties of two-dimensional(2D)periodic lattice metamaterials.The ke...A robust generalized continuum model called the wavelength-dependent strain gradient continuum model(WDSGM)has been proposed to predict dispersion properties of two-dimensional(2D)periodic lattice metamaterials.The key idea lies in replacing the classical Taylor expansion of displacement fields with a wavelength-dependent one,naturally leading to new equations of motion and therefore a significantly improved capability of predicting dispersion characteristics.For different 2D lattices,dispersion results derived from the proposed WDSGM are verified by comparing with those obtained from the discrete model and the existing strain gradient continuum model(SGM)in the irreducible Brillouin zone.Based on the proposed model,the effects of SG orders have been investigated.Results suggest that considering the wavelength-dependent Taylor expansion and increasing the SG order are beneficial to improving the predictive performance of continuum models.The proposed model is free of any instability issue which is challenging for many existing SG methods.Under given parameters,the proposed WDSGM with eighth-order truncation is enough to predict the dispersion relation of three lattices,i.e.,the square,triangular and hexagonal lattices throughout the irreducible Brillouin zone.展开更多
WITHDRAWAL:Zhang,J.J.,Guo,Y.Q.,Qin,Z.Y.,Wei,C.T.,Hu,Q.H.,Vandeginste,V.,Miao,H.Y.,Yao,P.,and Zhang,P.F.,“Predicting Irreducible Water Saturation of Unconventional Reservoirs by Using NMR T2 Spectra:Methods of Morphol...WITHDRAWAL:Zhang,J.J.,Guo,Y.Q.,Qin,Z.Y.,Wei,C.T.,Hu,Q.H.,Vandeginste,V.,Miao,H.Y.,Yao,P.,and Zhang,P.F.,“Predicting Irreducible Water Saturation of Unconventional Reservoirs by Using NMR T2 Spectra:Methods of Morphological Division and Fractal Models”,Acta Geologica Sinica-English Edition(Accepted Article):https://doi.org/10.1111/1755-6724.15094.展开更多
文摘[目的]探讨全角度复位固定治疗小粗隆二分型难复性股骨粗隆间骨折(irreducible intertrochanteric fractures of the femur,IRIFF)的临床疗效。[方法]2020年1月—2022年12月18例小粗隆二分型IRIFF患者,采用冠状位钳夹联合矢状位撬拨全角度辅助复位髓内钉内固定治疗。评价临床及影像结果。[结果]本组患者手术时间(39.7±7.0)min,术中出血量(124.7±50.0)mL。患者均获(11.7±2.1)个月随访。1例因头钉切割行半髋关节置换。随术前,术后4周和末次随访的时间推移,VAS评分[(6.4±1.1),(2.8±1.5),(0.7±1.1),P<0.001]、髋关节Harris评分[(37.9±8.3),(71.6±10.8),(92.7±10.3),P<0.001]、髋伸屈ROM[(5.3±4.4)°,(67.4±13.0)°,(97.2±13.0)°,P<0.001]均显著改善。影像方面,与术前相比,术后4个月及末次随访时,患髋关节颈干角[(76.5±8.2)°,(129.1±4.9)°,(125.1±7.0)°,P<0.001]显著增大,与术后4周相比,末次随访时,尖顶距无显著变化(P>0.05),17例患者骨折一期愈合,骨折愈合时间为(6.6±1.5)个月。[结论]全角度辅助复位技术内固定治疗小粗隆二分型IRIFF,复位固定满意,临床疗效确切。
基金supported by the National Natural Science Foundation of China(Grand No.12472066).
文摘A robust generalized continuum model called the wavelength-dependent strain gradient continuum model(WDSGM)has been proposed to predict dispersion properties of two-dimensional(2D)periodic lattice metamaterials.The key idea lies in replacing the classical Taylor expansion of displacement fields with a wavelength-dependent one,naturally leading to new equations of motion and therefore a significantly improved capability of predicting dispersion characteristics.For different 2D lattices,dispersion results derived from the proposed WDSGM are verified by comparing with those obtained from the discrete model and the existing strain gradient continuum model(SGM)in the irreducible Brillouin zone.Based on the proposed model,the effects of SG orders have been investigated.Results suggest that considering the wavelength-dependent Taylor expansion and increasing the SG order are beneficial to improving the predictive performance of continuum models.The proposed model is free of any instability issue which is challenging for many existing SG methods.Under given parameters,the proposed WDSGM with eighth-order truncation is enough to predict the dispersion relation of three lattices,i.e.,the square,triangular and hexagonal lattices throughout the irreducible Brillouin zone.
文摘WITHDRAWAL:Zhang,J.J.,Guo,Y.Q.,Qin,Z.Y.,Wei,C.T.,Hu,Q.H.,Vandeginste,V.,Miao,H.Y.,Yao,P.,and Zhang,P.F.,“Predicting Irreducible Water Saturation of Unconventional Reservoirs by Using NMR T2 Spectra:Methods of Morphological Division and Fractal Models”,Acta Geologica Sinica-English Edition(Accepted Article):https://doi.org/10.1111/1755-6724.15094.
