Total shoulder arthroplasty is a standard restorative procedure practiced by orthopedists to diagnose shoulder arthritis in which a prosthesis replaces the whole joint or a part of the joint.It is often challenging fo...Total shoulder arthroplasty is a standard restorative procedure practiced by orthopedists to diagnose shoulder arthritis in which a prosthesis replaces the whole joint or a part of the joint.It is often challenging for doctors to identify the exact model and manufacturer of the prosthesis when it is unknown.This paper proposes a transfer learning-based class imbalance-aware prosthesis detection method to detect the implant’s manufacturer automatically from shoulder X-ray images.The framework of the method proposes a novel training approach and a new set of batch-normalization,dropout,and fully convolutional layers in the head network.It employs cyclical learning rates and weighting-based loss calculation mechanism.These modifications aid in faster convergence,avoid local-minima stagnation,and remove the training bias caused by imbalanced dataset.The proposed method is evaluated using seven well-known pre-trained models of VGGNet,ResNet,and DenseNet families.Experimentation is performed on a shoulder implant benchmark dataset consisting of 597 shoulder X-ray images.The proposed method improves the classification performance of all pre-trained models by 10–12%.The DenseNet-201-based variant has achieved the highest classification accuracy of 89.5%,which is 10%higher than existing methods.Further,to validate and generalize the proposed method,the existing baseline dataset is supplemented to six classes,including samples of two more implant manufacturers.Experimental results have shown average accuracy of 86.7%for the extended dataset and show the preeminence of the proposed method.展开更多
目的报道经治的13例3D打印生物型多孔肱骨干假体治疗肱骨近端超极限瘤性骨缺损的早期疗效并介绍生物型多孔肱骨干假体的设计理念。方法回顾性分析接受肱骨近端恶性肿瘤瘤段整体切除同时超极限关节保留联合3D打印多孔肱骨干假体重建术患...目的报道经治的13例3D打印生物型多孔肱骨干假体治疗肱骨近端超极限瘤性骨缺损的早期疗效并介绍生物型多孔肱骨干假体的设计理念。方法回顾性分析接受肱骨近端恶性肿瘤瘤段整体切除同时超极限关节保留联合3D打印多孔肱骨干假体重建术患者的基线资料、手术相关资料、肿瘤学预后、骨整合情况、假体相关并发症及术后功能状态。结果患者的平均年龄为(20.2±3.8)岁,中位随访期为48.0个月。残留的肱骨近端长度平均为(17.6±1.1)mm。所有的患者均保留了肱骨头,大部分的肩袖保留完整。患侧肩关节平均活动范围(range of motion,ROM)为前屈84.8°,外展为79.5°,后伸为26.8°,内收为16.2°。肌肉骨骼肿瘤协会评分(Musculoskeletal Tumor Society,MSTS)平均得分94.4%,在骨与假体的界面上观察到良好的骨整合。结论3D打印生物型多孔肱骨干假体治疗肱骨近端超极限瘤性骨缺损,术后近期随访,功能满意,为肱骨近端超极限瘤性缺损患者的关节保留重建提供了一种新的选择。展开更多
Purpose:Unsatisfactory results of hemiarthroplasty in Neer’’s 3- and 4-part proximal humerus fractures in elderly,have led to the shift towards reverse shoulder arthroplasty (RSA).The objective of our study was to r...Purpose:Unsatisfactory results of hemiarthroplasty in Neer’’s 3- and 4-part proximal humerus fractures in elderly,have led to the shift towards reverse shoulder arthroplasty (RSA).The objective of our study was to repair the tuberosities that are generally overlooked during RSA and observe its impact on the functional outcome and shoulder scores.Methods:We include elderly patients with acutely displaced or dislocated 3- or 4-part proximal humerus fractures from July 2013 to November 2019 who were treated with RSA along with tuberosity repair by non-absorbable sutures and bone grafting harvested from the humeral head.Open injuries and cases with neuro-muscular involvement of the deltoid muscle were excluded.According to the tuberosity healing on radiographs of the shoulder at 9th postoperative month,the patients were divided into 2 groups,as the group with successful tuberosity repair and the other with failed tuberosity repair.Statistical analysis of the functional outcome and shoulder scores between the 2 groups were done by independentt-test for normally distributed parameters and Mann-Whitney test for the parameters,where data was not normally distributed.Results:Of 41 patients,tuberosity healing was achieved in 28 (68.3%) and failed in 13 (31.7%) cases.Lysis of the tuberosity occurred in 5 patients,tuberosity displacement in 2,and nonunion in 2.Mean age was 70.4 years (range 65 – 79 years) and mean follow-up was 58.7 months (range 18 – 93 months).There were no major complications.Group with successful tuberosity repair showed improvement in mean active range of movements,like anterior elevation (165.1°± 4.9°vs.144.6°± 9.4°,p < 0.000),lateral elevation (158.9°± 7.2°vs.138.4°± 9.6°,p < 0.000),external rotation (30.5°± 6.9°vs.35.0°± 6.3°,p = 0.367),internal rotation (33.7°± 7.5°vs.32.6°± 6.9°,p = 0.671) and in mean shoulder scores including Constant score (70.7 ± 4.1vs.55.5 ± 5.7,p < 0.000),American shoulder and elbow surgeons score (90.3 ± 2.4vs.69.0 ± 5.7,p < 0.000),disabili展开更多
背景:全肩关节置换治疗肩骨关节炎的临床疗效是显著的,一些对照研究尝试回答无柄假体与有柄假体治疗肩骨关节炎临床疗效的优劣,但得出的结论有待进一步证实。目的:系统评价在全肩关节置换中应用无柄假体与有柄假体治疗肩骨关节炎的临床...背景:全肩关节置换治疗肩骨关节炎的临床疗效是显著的,一些对照研究尝试回答无柄假体与有柄假体治疗肩骨关节炎临床疗效的优劣,但得出的结论有待进一步证实。目的:系统评价在全肩关节置换中应用无柄假体与有柄假体治疗肩骨关节炎的临床疗效。方法:计算机检索(建库至2018年9月)Pub Med、SpringerLink、Web of Science、EBSCO、The Cochrane Library、EMBASE、CNKI、WANFANG Data、VIP数据库,收集关于无柄假体与有柄假体全肩关节置换治疗肩骨关节炎的随机对照研究和非随机对照研究。对文献进行方法学质量评价。采用Cochrane协作网提供的Rev Man 5.3软件进行Meta分析,比较无柄假体与有柄假体治疗肩骨关节炎的临床疗效。结果与结论:(1)共纳入5篇研究,其中3篇随机对照研究,2篇非随机临床对照研究,共计182例患者190肩(此文按肩计数分析);(2)Meta分析结果显示,无柄假体组较有柄假体组的手术时间短,术后估计失血量少;(3)无柄假体组术后Constant肩关节评分较有柄假体组更低,行敏感性分析,剔除1篇低质量文献后,2组术后Constant肩关节评分的差异无显著性意义;(4)2组术后日常生活活动能力评分、力量评分、疼痛评分、肩膀运动范围评分以及肩关节前屈度、外展度的差异均无显著性意义;(5)提示无柄假体与有柄假体全肩关节置换治疗肩骨关节炎的术后短中期疗效相当;但从理论上认为,无柄假体全肩关节置换在治疗肩骨关节炎方面存在更大的优势,能缩短手术时间,降低术后失血量。展开更多
文摘Total shoulder arthroplasty is a standard restorative procedure practiced by orthopedists to diagnose shoulder arthritis in which a prosthesis replaces the whole joint or a part of the joint.It is often challenging for doctors to identify the exact model and manufacturer of the prosthesis when it is unknown.This paper proposes a transfer learning-based class imbalance-aware prosthesis detection method to detect the implant’s manufacturer automatically from shoulder X-ray images.The framework of the method proposes a novel training approach and a new set of batch-normalization,dropout,and fully convolutional layers in the head network.It employs cyclical learning rates and weighting-based loss calculation mechanism.These modifications aid in faster convergence,avoid local-minima stagnation,and remove the training bias caused by imbalanced dataset.The proposed method is evaluated using seven well-known pre-trained models of VGGNet,ResNet,and DenseNet families.Experimentation is performed on a shoulder implant benchmark dataset consisting of 597 shoulder X-ray images.The proposed method improves the classification performance of all pre-trained models by 10–12%.The DenseNet-201-based variant has achieved the highest classification accuracy of 89.5%,which is 10%higher than existing methods.Further,to validate and generalize the proposed method,the existing baseline dataset is supplemented to six classes,including samples of two more implant manufacturers.Experimental results have shown average accuracy of 86.7%for the extended dataset and show the preeminence of the proposed method.
文摘目的报道经治的13例3D打印生物型多孔肱骨干假体治疗肱骨近端超极限瘤性骨缺损的早期疗效并介绍生物型多孔肱骨干假体的设计理念。方法回顾性分析接受肱骨近端恶性肿瘤瘤段整体切除同时超极限关节保留联合3D打印多孔肱骨干假体重建术患者的基线资料、手术相关资料、肿瘤学预后、骨整合情况、假体相关并发症及术后功能状态。结果患者的平均年龄为(20.2±3.8)岁,中位随访期为48.0个月。残留的肱骨近端长度平均为(17.6±1.1)mm。所有的患者均保留了肱骨头,大部分的肩袖保留完整。患侧肩关节平均活动范围(range of motion,ROM)为前屈84.8°,外展为79.5°,后伸为26.8°,内收为16.2°。肌肉骨骼肿瘤协会评分(Musculoskeletal Tumor Society,MSTS)平均得分94.4%,在骨与假体的界面上观察到良好的骨整合。结论3D打印生物型多孔肱骨干假体治疗肱骨近端超极限瘤性骨缺损,术后近期随访,功能满意,为肱骨近端超极限瘤性缺损患者的关节保留重建提供了一种新的选择。
文摘Purpose:Unsatisfactory results of hemiarthroplasty in Neer’’s 3- and 4-part proximal humerus fractures in elderly,have led to the shift towards reverse shoulder arthroplasty (RSA).The objective of our study was to repair the tuberosities that are generally overlooked during RSA and observe its impact on the functional outcome and shoulder scores.Methods:We include elderly patients with acutely displaced or dislocated 3- or 4-part proximal humerus fractures from July 2013 to November 2019 who were treated with RSA along with tuberosity repair by non-absorbable sutures and bone grafting harvested from the humeral head.Open injuries and cases with neuro-muscular involvement of the deltoid muscle were excluded.According to the tuberosity healing on radiographs of the shoulder at 9th postoperative month,the patients were divided into 2 groups,as the group with successful tuberosity repair and the other with failed tuberosity repair.Statistical analysis of the functional outcome and shoulder scores between the 2 groups were done by independentt-test for normally distributed parameters and Mann-Whitney test for the parameters,where data was not normally distributed.Results:Of 41 patients,tuberosity healing was achieved in 28 (68.3%) and failed in 13 (31.7%) cases.Lysis of the tuberosity occurred in 5 patients,tuberosity displacement in 2,and nonunion in 2.Mean age was 70.4 years (range 65 – 79 years) and mean follow-up was 58.7 months (range 18 – 93 months).There were no major complications.Group with successful tuberosity repair showed improvement in mean active range of movements,like anterior elevation (165.1°± 4.9°vs.144.6°± 9.4°,p < 0.000),lateral elevation (158.9°± 7.2°vs.138.4°± 9.6°,p < 0.000),external rotation (30.5°± 6.9°vs.35.0°± 6.3°,p = 0.367),internal rotation (33.7°± 7.5°vs.32.6°± 6.9°,p = 0.671) and in mean shoulder scores including Constant score (70.7 ± 4.1vs.55.5 ± 5.7,p < 0.000),American shoulder and elbow surgeons score (90.3 ± 2.4vs.69.0 ± 5.7,p < 0.000),disabili
文摘背景:全肩关节置换治疗肩骨关节炎的临床疗效是显著的,一些对照研究尝试回答无柄假体与有柄假体治疗肩骨关节炎临床疗效的优劣,但得出的结论有待进一步证实。目的:系统评价在全肩关节置换中应用无柄假体与有柄假体治疗肩骨关节炎的临床疗效。方法:计算机检索(建库至2018年9月)Pub Med、SpringerLink、Web of Science、EBSCO、The Cochrane Library、EMBASE、CNKI、WANFANG Data、VIP数据库,收集关于无柄假体与有柄假体全肩关节置换治疗肩骨关节炎的随机对照研究和非随机对照研究。对文献进行方法学质量评价。采用Cochrane协作网提供的Rev Man 5.3软件进行Meta分析,比较无柄假体与有柄假体治疗肩骨关节炎的临床疗效。结果与结论:(1)共纳入5篇研究,其中3篇随机对照研究,2篇非随机临床对照研究,共计182例患者190肩(此文按肩计数分析);(2)Meta分析结果显示,无柄假体组较有柄假体组的手术时间短,术后估计失血量少;(3)无柄假体组术后Constant肩关节评分较有柄假体组更低,行敏感性分析,剔除1篇低质量文献后,2组术后Constant肩关节评分的差异无显著性意义;(4)2组术后日常生活活动能力评分、力量评分、疼痛评分、肩膀运动范围评分以及肩关节前屈度、外展度的差异均无显著性意义;(5)提示无柄假体与有柄假体全肩关节置换治疗肩骨关节炎的术后短中期疗效相当;但从理论上认为,无柄假体全肩关节置换在治疗肩骨关节炎方面存在更大的优势,能缩短手术时间,降低术后失血量。
