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检索条件"作者=Qing-jiang Pang"

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Research in the precaution of recombinant human erythropoietin to steroid-induced osteonecrosis of the rat femoral head

Research in the precaution of recombinant human erythropoiet...

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2018年浙江省骨科学学术年会

作者： Lu-yong jiang Xiao Yu qing-jiang pang 宁波市第二人民医院

Objective:To elucidate the effects of recombinant human erythropoietin(rHuEPO) on steroid-induced osteonecrosis of the femoral head in ***:Twenty-four adult Wistar rats were randomly divided into three groups of eight rats *** rats in the positive control group were injected with dexamethasone at 1 mg/kg twice a week for 5 *** rats in the negative control group were injected with sodium chloride *** rats in the experimental group were injected with dexamethasone at 1 mg/kg twice a week for 5 weeks and rHuEPO(500 u/d/kg) daily for 5 *** femoral head on one side was examined by hematoxylin and eosin staining,and that on the other side was examined by CD31 staining of the ***:Hematoxylin and eosin staining in the positive control group showed that the bony trabeculae had become obviously narrow and sparse with discontinuity of the *** integrity of the trabeculae was better in the experimental group than positive control *** CD31 expression was lower in the positive control group than in the other two ***:rHuEPO can effectively prevent osteocyte apoptosis,delaying or decreasing osteonecrosis of the femoral head.

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The injuries to the fourth and fifth tarsometatarsal joints:A review of the surgical management by internal fixation,arthrodesis and arthroplasty

The injuries to the fourth and fifth tarsometatarsal joints:...

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2013中国工程院科技论坛暨浙江省骨科学学术年会

作者： Xiao Yu qing-jiang pang Guang-rong Yu

The surgical management to the injuries of the fourth and fifth tarsometatarsal(TMT) joints is controversial. We briefly review the anatomical characteristics to the injuries,the diagnosis,as well as the individualized treatment of the injuries of the fourth and fifth TMT joints by open reduction and internal fixation,TMT arthrodesis and *** conclude that open reduction and internal fixation is the recommended option for acute injuries,while arthrodesis can be used in cases of malunion of the fourth and fifth TMT joints with gross pain or arthritic changes and obvious structural *** is an effective salvage operation mainly used in high-demand patients with severe TMT ***,we propose a rec- ommended treatment algorithm(based on the literature and our experience),taking into account the specific indications for internal fixation,TMT arthrodesis and arthroplasty to optimize the individualized treatment. Data sources /Study selection:Data from survey reports,descriptive,cross-sectional and longitudinal studies published from 2002 to 2012 on the topic of the injuries to the fourth and fifth tarsometatarsal joint on human and radiography studies were included. Data Extraction:The data was extracted from online resources of American Orthopaedic Foot & Ankle Society, American Academy of Orthopaedic Surgeons,US National Library of Medicine,The MEDLINE. Conclusion:It is important to comprehend the specific anatomical characteristics and grasp the strict indications, advantages and disadvantages of the ORIF,TMT arthrodesis and arthroplasty to optimize the individualized treatment of the fourth and fifth TMT joints injuries in a maximum extent.

关键词： Tarsometatarsal joint Open reduction and internal fixation Arthroplasty Arthrodesis

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The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis

The sustentaculum tali screw fixation for the treatment of S...

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2018年浙江省骨科学学术年会

作者： qing-jiang pang Xiao YU Zong-Hui GUO Department of Orthopedics Center Ningbo No.2 Hospital

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The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis

The sustentaculum tali screw fixation for the treatment of S...

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2015年浙江省骨科学学术年会

作者： qing-jiang pang Xiao YU Zong-Hui GUO Department of Orthopedics Center Ningbo No.2 Hospital

Objective In the surgery of calcaneal fracture,whether the sustentaculum tali screw should always be placed is widely *** aim of this study is to explore the necessity and function of the sustentaculum tali screw placement for the treatment of Sanders type Ⅱ calcaneal *** The finite element analysis was used in this *** the establishment of the finite element model of Sanders type Ⅱ calcaneal fracture,the two internal fixation simulations were *** one model,the AO calcaneal plate was simulated on the lateral side of the calcanues with 7 screws being fixated at different position of the plate,In the other model,the calcaneus was fixated with the same AO calcaneal plate together with an additional screw being infiltrated into the sustentaculum *** two models were simulated under the same loading and the displacement of the fracture line and the stress distribution in the two models were calculated *** The maximum principal stress focused on the cortical bone of sustentaculum tali in both of the models under the same *** displacement of the fracture line,the maximum principal stress of calcaneus and internal fixation system in the model with sustentaculum screw fixation were smaller than that in the model without sustentaculum screw *** stress in the model with sustentaculum screw fixation was more *** The placement of sustentaculum tali screw is essential for fixation of type Ⅱ calcaneal fracture to achieve the biomechanical stability.

关键词： Calcaneal fracture Sustentaculum tali Screws Finite element analysis Biomechanics

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Functional outcome of tarsometatarsal joint fracture dislocation managed according to Myerson classification

Functional outcome of tarsometatarsal joint fracture disloca...

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2018年浙江省骨科学学术年会

作者： Xiao Yu qing-jiang pang Chang-Chun Yang 宁波市第二人民医院

Objective:To summarize the functional outcome of tarsometatarsal joint fracture-dislocation managed according to Myerson ***:Total eighty cases of tarsometatarsal joint fracture-dislocation were treated from Mar 2004 to Feb *** to the Myerson classification,there were 14 cases in type A,12 cases in type B1,28 cases in type B2,11 cases in type C1 and 15 cases in type *** the cases were treated with open reduction and internal fixation and the incisions and implants were also selected according to the Myerson classification.X-ray was examined during the follow-up period and functional evaluation was carried out by American Orthopaedic Foot and Ankle Society(AOFAS) midfoot score *** of variance was used to test the different types of Myerson ***:Sixty eight patients got a mean follow-up of 24 months(15-36 months).No patient suffered from infection,skin flap necrosis and X-ray showed there were no implants loosening or *** mean AOFAS score was 88.4(47-100) and excellent and good result was 89.7%.The differences among Myerson classifications showed that there were statistical significance between type B and type A,type C(P <0.05) Three patients suffered from severe pain and difficult walking,X-ray showed the ambiguity of the joint space,which can be diagnosed as posttraumatic *** patient had arthrodesis ***:The Myerson classification is helpful to make preoperative plan and judging prognosis to the tarsometatarsal joint *** type B,single or double incisions with screw or plate fixation is enough,while in type A and type C,double or triple incisions with screw or plate fixation in medial joints and Kirschner wire fixation in lateral joints are ***,the type B patients had better prognosis than type A and type C ***,the concomitant injuries around the tarsometatarsal joint were not included in Myerson classification,which is the limitatio

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The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis

The sustentaculum tali screw fixation for the treatment of S...

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2016年浙江省骨科学学术年会

作者： qing-jiang pang Xiao YU Zong-Hui GUO 宁波二院

Objective In the surgery of calcaneal fracture,whether the sustentaculum tali screw should always be placed is widely *** aim of this study is to explore the necessity and function of the sustentaculum tali screw placement for the treatment of Sanders type □ calcaneal fracture. Methods The finite element analysis was used in this *** the establishment of the finite element model of Sanders type,calcaneal fracture,the two internal fixation simulations were *** one model, the AO calcaneal plate was simulated on the lateral side of the calcanues with 7 screws being fixated at different position of the plate,In the other model,the calcaneus was fixated with the same AO calcaneal plate together with an additional screw being infiltrated into the sustentaculum *** two models were simulated under the same loading and the displacement of the fracture line and the stress distribution in the two models were calculated respectively. Results The maximum principal stress focused on the cortical bone of sustentaculum tali in both of the models under the same *** displacement of the fracture line,the maximum principal stress of calcaneus and internal fixation system in the model with sustentaculum screw fixation were smaller than that in the model without sustentaculum screw *** stress in the model with sustentaculum screw fixation was more dispersed. Conclusions The placement of sustentaculum tali screw is essential for fixation of type II calcaneal fracture to achieve the biomechanical stability.

关键词： Calcaneal fracture Sustentaculum tali Screws Finite element analysis Biomechanics

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Functional outcome of tarsometatarsal joint fracture dislocation managed according to Myerson classification

Functional outcome of tarsometatarsal joint fracture disloca...

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2015年浙江省骨科学学术年会

作者： Xiao Yu qing-jiang pang Chang-Chun Yang

Objective:To summarize the functional outcome of tarsometatarsal joint fracture-dislocation managed according to Myerson ***:Total eighty cases of tarsometatarsal joint fracture-dislocation were treated from Mar 2004 to *** to the Myerson classification,there were 14 cases in type A,12 cases in type B1,28 cases in type B2,11 cases in type C1 and 15 cases in type *** the cases were treated with open reduction and internal fixation and the incisions and implants were also selected according to the Myerson classification.X-ray was examined during the follow-up period and functional evaluation was carried out by American Orthopaedic Foot and Ankle Society(AOFAS) midfoot score *** of variance was used to test the different types of Myerson ***:Sixty eight patients got a mean follow-up of 24 months(15-36 months).No patient suffered from infection,skin flap necrosis and X-ray showed there were no implants loosening or *** mean AOFAS score was 88.4(47-100) and excellent and good result was 89.7%.The differences among Myerson classifications showed that there were statistical significance between type B and type A,type C(P < 0.05) Three patients suffered from severe pain and difficult walking,X-ray showed the ambiguity of the joint space,which can be diagnosed as posttraumatic *** patient had arthrodesis ***:The Myerson classification is helpful to make preoperative plan and judging prognosis to the tarsometatarsal joint *** type B,single or double incisions with screw or plate fixation is enough,while in type A and type C,double or triple incisions with screw or plate fixation in medial joints and Kirschner wire fixation in lateral joints are ***,the type B patients had better prognosis than type A and type C ***,the concomitant injuries around the tarsometatarsal joint were not included in Myerson classification,which is the limitatio

关键词： Tarsometatarsal joint Fracture-dislocation Open reduction Internal fixation

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Functional outcome of hip joint dislocation concomitant femoral head fracture managed by Pipkin classification

Functional outcome of hip joint dislocation concomitant femo...

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2016年浙江省骨科学学术年会

作者： Xiao Yu qing-jiang pang Xian-Jun Chen Yun-Wang

Objective:To summarize the functional outcome of the hip joint dislocation concomitant femoral head fracture managed according to Pipkin ***:A total of 19 patients with hip joint dislocation with concomitant femoral head fracture were retrospectively analyzed from Jan 2008 to Jan *** to the classification of Pipkin criteria,there were4 cases in type Ⅰ,6 cases in type Ⅱ,6 cases in type Ⅲ and 3 cases in type Ⅳ Various procedures were taken according to the different types of the fracture,the time of the fracture,and the age of the patients.X-ray was examined during the follow-up period and functional evaluation was carried out by Harris Hip Score’s *** clinical therapeutic effects were ***:All the patients got a mean follow-up of 18 months(9-36 months).No patient suffered from infection,skin flap necrosis and X-ray showed there was no implants loosening or *** to the Harris Hip Score’s criteria,in type I,4 cases were rated as *** type Ⅱ,2 cases rated as excellent,3 cases as good and 1 case as *** type Ⅲ,3 cases rated as good,2 cases as fair and 1 case as *** type Ⅳ,1 case rated as excellent,1 case as good and 1 case as *** overall rate of excellent and good was 73.7%.Conclusion:Pipkin classification is helpful to make preoperative plan and judging the prognosis in cases of fracture head of femur and concomitant dislocation of the hip ***,besides Pipkin classification,multiple factors such as the time from injury to surgery,the ages of patients,the selection of implants should also be considered,which may affect the functional outcome.

关键词： Hip dislocation Femoral head fracture Pipkin classification Harris Hip Score’s criteria

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Functional outcome of hip joint dislocation concomitant femoral head fracture managed by Pipkin classification

Functional outcome of hip joint dislocation concomitant femo...

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2018年浙江省骨科学学术年会

作者： Xiao Yu qing-jiang pang Xian-Jun Chen Yun-Wang 宁波市第二人民医院

Objective:To summarize the functional outcome of the hip joint dislocation concomitant femoral head fracture managed according to Pipkin ***:A total of 19 patients with hip joint dislocation with concomitant femoral head fracture were retrospectively analyzed from Jan 2008 to Jan *** to the classification of Pipkin criteria,there were4 cases in type Ⅰ,6 cases in type Ⅱ,6 cases in type Ⅲ and 3 cases in type Ⅳ Various procedures were taken according to the different types of the fracture,the time of the fracture,and the age of the patients.X-ray was examined during the follow-up period and functional evaluation was carried out by Harris Hip Score’s *** clinical therapeutic effects were ***:All the patients got a mean follow-up of 18 months(9-36 months).No patient suffered from infection,skin flap necrosis and X-ray showed there was no implants loosening or *** to the Harris Hip Score’s criteria,in type Ⅰ,4 cases were rated as *** type Ⅱ, 2 cases rated as excellent,3 cases as good and 1 case as *** type Ⅲ,3 cases rated as good,2 cases as fair and 1 case as *** type Ⅳ,1 case rated as excellent,1 case as good and 1 case as *** overall rate of excellent and good was 73.7%.Conclusion:Pipkin classification is helpful to make preoperative plan and judging the prognosis in cases of fracture head of femur and concomitant dislocation of the hip ***,besides Pipkin classification,multiple factors such as the time from injury to surgery,the ages of patients,the selection of implants should also be considered,which may affect the functional outcome.

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Finite element analysis of locking plate and 1/4 tubular plate for first tarsometatarsal joint fracture-dislocation

Finite element analysis of locking plate and 1/4 tubular pla...

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2018年浙江省骨科学学术年会

作者： Xiao Yu Wei-long Li qing-jiang pang Rong-li Zhou 宁波市第二人民医院

Objective:The optimal plate for fixation of tarsometatarsal joint injuries is *** objective of this study was to compare the biomechanical characteristics between a locking plate and 1/4 tubular plate for first tarsometatarsal joint ***:Finite element analysis was used after establishment of a first tarsometatarsal joint fracturedislocation *** implant simulations using a locking plate and five-hole 1/4 tubular plate were designed to simulate fixation of the *** displacement of the first tarsometatarsal articular surface and the stress distribution in the implants were ***:A 700-N load was applied to both *** minimum displacement of the articular surface in the locking plate and 1/4 tubular plate model was 0.6471 mm and 0.3833 mm,*** maximum principal stress in the locking plate and 1/4 tubular plate was 1.212 103 MPa and 1.107 103 MPa,***:Use of a 1/4 tubular plate is recommended for fixation of first tarsometatarsal joint fracturedislocation after consideration of other factors such as economical issues.

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