目的:观察关节镜下Bankart损伤修复术联合Remplissage术治疗合并Hill-Sachs损伤的复发性肩关节前脱位的临床疗效。方法:2015年4月至2018年4月,采用关节镜下Bankart损伤修复术联合Remplissage术治疗复发性肩关节前脱位患者18例。男13例,...目的:观察关节镜下Bankart损伤修复术联合Remplissage术治疗合并Hill-Sachs损伤的复发性肩关节前脱位的临床疗效。方法:2015年4月至2018年4月,采用关节镜下Bankart损伤修复术联合Remplissage术治疗复发性肩关节前脱位患者18例。男13例,女5例。年龄18~43岁,中位数31岁。均合并Hill-Sachs损伤,骨缺损体积均小于肱骨头体积的20%。合并肩胛骨关节盂骨缺损14例,骨缺损直径均小于关节盂直径的20%;合并肱二头肌肌腱炎4例、上盂唇损伤3例;均不合并盂肱韧带肱骨侧撕脱损伤、肱骨大小结节骨折及肩袖损伤。采用美国肩肘关节外科医师协会(American Shoulder and Elbow Surgeons,ASES)评分标准、美国加州大学洛杉矶分校(the University of California at LosAngeles,UCLA)肩关节评分标准评价临床疗效,记录手术前后肩关节屈曲活动度、外旋活动度。结果:所有患者均获随访,随访时间12~17个月,中位数15个月。ASES评分,术前(84.4±4.7)分,术后12个月(97.4±6.3)分;UCLA评分,术前(21.8±4.4)分,术后12个月(28.9±3.1)分;肩关节屈曲活动度,术前168.1°±2.7°,术后167.8°±2.9°;外旋活动度,术前71.0°±9.4°,术后72.7°±8.7°。末次随访时,所有患者均未发生肩关节再脱位。结论:关节镜下Bankart损伤修复术联合Remplissage术治疗合并Hill-Sachs损伤的复发性肩关节前脱位,有利于改善肩关节功能、维持肩关节正常活动,避免肩关节再脱位。展开更多
To satisfy the demand on dynamic performance and load characteristics of piezoelectric actuators in aeronautics and astronautics fields,a novel 2Dpiezo-nanopositioning stage utilizing a triangle amplifier mechanism is...To satisfy the demand on dynamic performance and load characteristics of piezoelectric actuators in aeronautics and astronautics fields,a novel 2Dpiezo-nanopositioning stage utilizing a triangle amplifier mechanism is proposed.The stage is driven by piezoelectric rhombic units in both X and Ydirections,which is composed of four piezoelectric stacks.Theoretical static model develops the relationships among output force,displacement,static stiffness and the structure parameters of the platform.The experimental results of the prototype show that the output performances in X and Ydirections are similar and both of them are within an 8% deviation from the theoretical values.The stroke of the stage reaches 41.6μm and 42.9μm in Xand Ydirections,respectively,and is directly proportional to the amplitude of the input sinusoidal voltage 10 Hz.Moreover,the nano-positioning stage is featured with bidirectional symmetrical output characteristic and millisecond starting characteristic,whose minimum output displacement step is 50 nm.展开更多
文摘目的:观察关节镜下Bankart损伤修复术联合Remplissage术治疗合并Hill-Sachs损伤的复发性肩关节前脱位的临床疗效。方法:2015年4月至2018年4月,采用关节镜下Bankart损伤修复术联合Remplissage术治疗复发性肩关节前脱位患者18例。男13例,女5例。年龄18~43岁,中位数31岁。均合并Hill-Sachs损伤,骨缺损体积均小于肱骨头体积的20%。合并肩胛骨关节盂骨缺损14例,骨缺损直径均小于关节盂直径的20%;合并肱二头肌肌腱炎4例、上盂唇损伤3例;均不合并盂肱韧带肱骨侧撕脱损伤、肱骨大小结节骨折及肩袖损伤。采用美国肩肘关节外科医师协会(American Shoulder and Elbow Surgeons,ASES)评分标准、美国加州大学洛杉矶分校(the University of California at LosAngeles,UCLA)肩关节评分标准评价临床疗效,记录手术前后肩关节屈曲活动度、外旋活动度。结果:所有患者均获随访,随访时间12~17个月,中位数15个月。ASES评分,术前(84.4±4.7)分,术后12个月(97.4±6.3)分;UCLA评分,术前(21.8±4.4)分,术后12个月(28.9±3.1)分;肩关节屈曲活动度,术前168.1°±2.7°,术后167.8°±2.9°;外旋活动度,术前71.0°±9.4°,术后72.7°±8.7°。末次随访时,所有患者均未发生肩关节再脱位。结论:关节镜下Bankart损伤修复术联合Remplissage术治疗合并Hill-Sachs损伤的复发性肩关节前脱位,有利于改善肩关节功能、维持肩关节正常活动,避免肩关节再脱位。
基金supported partly by the Project on Integration of Industry,Education and Research of China Aviation Industry Corp.(No.CXY2013NH09)the National Natural Science Foundation of China(No.51375224)
文摘To satisfy the demand on dynamic performance and load characteristics of piezoelectric actuators in aeronautics and astronautics fields,a novel 2Dpiezo-nanopositioning stage utilizing a triangle amplifier mechanism is proposed.The stage is driven by piezoelectric rhombic units in both X and Ydirections,which is composed of four piezoelectric stacks.Theoretical static model develops the relationships among output force,displacement,static stiffness and the structure parameters of the platform.The experimental results of the prototype show that the output performances in X and Ydirections are similar and both of them are within an 8% deviation from the theoretical values.The stroke of the stage reaches 41.6μm and 42.9μm in Xand Ydirections,respectively,and is directly proportional to the amplitude of the input sinusoidal voltage 10 Hz.Moreover,the nano-positioning stage is featured with bidirectional symmetrical output characteristic and millisecond starting characteristic,whose minimum output displacement step is 50 nm.
