目的本研究旨在运用三维重建技术探索掌侧锁定钢板内固定治疗伴背侧骨块的桡骨远端骨折的临床疗效。方法回顾性分析我院自2016年7月至2019年12月收治的伴有背侧骨块的桡骨远端骨折病例共78例。其中男30例,女48例;年龄25~82岁,平均(53.5&...目的本研究旨在运用三维重建技术探索掌侧锁定钢板内固定治疗伴背侧骨块的桡骨远端骨折的临床疗效。方法回顾性分析我院自2016年7月至2019年12月收治的伴有背侧骨块的桡骨远端骨折病例共78例。其中男30例,女48例;年龄25~82岁,平均(53.5±9.2)岁。通过Mimics三维重建技术重建桡骨远端关节面,将累及骨性隆起内侧部分的背侧骨块作为关节内骨块,未累及者为关节外骨块,共得到背侧关节内骨块病例58例,背侧关节外骨块病例20例。研究一:将20例伴背侧关节外骨块的桡骨远端骨折患者与同期20例不伴背侧损伤的桡骨远端骨折患者进行病例对照研究,使用SPSS 23.0软件比较两组患者内固定术后3个月及12个月的影像学指标(掌倾角、尺偏角、桡骨高度)、腕关节活动度(背伸、掌屈、旋前、旋后)、握力、上肢功能评分(disability of arm shoulder hand,DASH),腕痛视觉模拟评分(visual analogue scale,VAS)。研究二:将伴背侧关节内骨块病例按照背侧骨块术后移位距离是否大于2mm分为移位组(12例)及非移位组(46例)进行病例对照研究,比较指标同研究一。结果所有手术均顺利完成,无一例并发症发生。研究一:所有患者均获随访,随访时间12~24个月,平均(14.5±3.3)个月。两组患者术后影像学指标(掌倾角、尺偏角、桡骨高度)及腕关节活动度(背伸、掌屈、旋前、旋后)、握力、DASH评分、VAS评分差异无统计学意义(P>0.05)。研究二:所有患者均获随访,随访时间12~24个月,平均(15.7±3.8)个月。未移位组患者术后3个月及12个月腕关节背伸活动度、DASH评分及VAS评分均优于移位组,未移位组患者术后3个月握力及术后12个月腕关节掌屈活动度优于移位组,差异有统计学意义(P<0.05),其余指标差异无统计学意义。移位组AO C3型骨折多于未移位组,差异具有统计学意义(P<0.05)。结论Mimics三维重建技术可有效区分桡骨远端背侧关节内及关节外骨块,有助于术前计划的制定。掌侧内固定治疗伴背侧关节外骨块的桡骨远端骨折可获得良好的临床疗效。伴背侧关节内骨块的桡骨远端AO C3型骨折掌侧内固定术后内固定失效风险较高,将造成腕关节疼痛,腕关节屈伸活动度、握力以及腕关节功能下降。展开更多
This paper presents methods for determining the basic geometry of end-gear with arc tooth external diameter, width of tooth, end module, number of teeth, pressure angle, tooth, tooth clearance parameters; at the same ...This paper presents methods for determining the basic geometry of end-gear with arc tooth external diameter, width of tooth, end module, number of teeth, pressure angle, tooth, tooth clearance parameters; at the same time gives the tooth bearing strength calculation method, and the formulas to calculate the tooth shear stress, surface stress and bolt fastening force of equivalent stress is established; finally write the software error simulation analysis.展开更多
The problems of attachment failure and detachment impact within gecko-like robots’ locomotion control are considered in this paper. A real-time foot-end force intelligent sensing module with integrated sensing and st...The problems of attachment failure and detachment impact within gecko-like robots’ locomotion control are considered in this paper. A real-time foot-end force intelligent sensing module with integrated sensing and structure is developed to help the robot get the foot-end force information in time and realize stable locomotion in an uncertain environment. Firstly,a structure/sensing integrated elastomer based on a Maltese cross/cantilever beam structure is completed by designing and finite element analysis. Secondly,a real-time data acquisition and transmission system is designed to obtain the foot-end reaction force which is miniaturized and distributed. Thirdly,based on this system,a force sensor calibration platform is built to complete the calibration,decoupling,and performance testing of the sensing module. Finally,the experiment of single-leg attachment performance is carried out. The results indicate that the three-axis sensing module can detect robot’s weight,measure the reaction force with high precision and provide real-time force from robot’s foot end.展开更多
文摘目的本研究旨在运用三维重建技术探索掌侧锁定钢板内固定治疗伴背侧骨块的桡骨远端骨折的临床疗效。方法回顾性分析我院自2016年7月至2019年12月收治的伴有背侧骨块的桡骨远端骨折病例共78例。其中男30例,女48例;年龄25~82岁,平均(53.5±9.2)岁。通过Mimics三维重建技术重建桡骨远端关节面,将累及骨性隆起内侧部分的背侧骨块作为关节内骨块,未累及者为关节外骨块,共得到背侧关节内骨块病例58例,背侧关节外骨块病例20例。研究一:将20例伴背侧关节外骨块的桡骨远端骨折患者与同期20例不伴背侧损伤的桡骨远端骨折患者进行病例对照研究,使用SPSS 23.0软件比较两组患者内固定术后3个月及12个月的影像学指标(掌倾角、尺偏角、桡骨高度)、腕关节活动度(背伸、掌屈、旋前、旋后)、握力、上肢功能评分(disability of arm shoulder hand,DASH),腕痛视觉模拟评分(visual analogue scale,VAS)。研究二:将伴背侧关节内骨块病例按照背侧骨块术后移位距离是否大于2mm分为移位组(12例)及非移位组(46例)进行病例对照研究,比较指标同研究一。结果所有手术均顺利完成,无一例并发症发生。研究一:所有患者均获随访,随访时间12~24个月,平均(14.5±3.3)个月。两组患者术后影像学指标(掌倾角、尺偏角、桡骨高度)及腕关节活动度(背伸、掌屈、旋前、旋后)、握力、DASH评分、VAS评分差异无统计学意义(P>0.05)。研究二:所有患者均获随访,随访时间12~24个月,平均(15.7±3.8)个月。未移位组患者术后3个月及12个月腕关节背伸活动度、DASH评分及VAS评分均优于移位组,未移位组患者术后3个月握力及术后12个月腕关节掌屈活动度优于移位组,差异有统计学意义(P<0.05),其余指标差异无统计学意义。移位组AO C3型骨折多于未移位组,差异具有统计学意义(P<0.05)。结论Mimics三维重建技术可有效区分桡骨远端背侧关节内及关节外骨块,有助于术前计划的制定。掌侧内固定治疗伴背侧关节外骨块的桡骨远端骨折可获得良好的临床疗效。伴背侧关节内骨块的桡骨远端AO C3型骨折掌侧内固定术后内固定失效风险较高,将造成腕关节疼痛,腕关节屈伸活动度、握力以及腕关节功能下降。
文摘This paper presents methods for determining the basic geometry of end-gear with arc tooth external diameter, width of tooth, end module, number of teeth, pressure angle, tooth, tooth clearance parameters; at the same time gives the tooth bearing strength calculation method, and the formulas to calculate the tooth shear stress, surface stress and bolt fastening force of equivalent stress is established; finally write the software error simulation analysis.
基金supported by the National Natural Science Foundation of China(Nos.31601870,51435008)Jiangsu Educational Innovation Program(No.KYLX16_0328)
文摘The problems of attachment failure and detachment impact within gecko-like robots’ locomotion control are considered in this paper. A real-time foot-end force intelligent sensing module with integrated sensing and structure is developed to help the robot get the foot-end force information in time and realize stable locomotion in an uncertain environment. Firstly,a structure/sensing integrated elastomer based on a Maltese cross/cantilever beam structure is completed by designing and finite element analysis. Secondly,a real-time data acquisition and transmission system is designed to obtain the foot-end reaction force which is miniaturized and distributed. Thirdly,based on this system,a force sensor calibration platform is built to complete the calibration,decoupling,and performance testing of the sensing module. Finally,the experiment of single-leg attachment performance is carried out. The results indicate that the three-axis sensing module can detect robot’s weight,measure the reaction force with high precision and provide real-time force from robot’s foot end.
