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2016年浙江省骨科学学术年会

作者： dengwei he Wenjun Huang Xiaoyong Sheng 丽水市中心医院

Background:A rare case of atlantoaxial lateral mass joint interlocking secondary to traumatic posterolateral C1/C2 complete dislocation associated with type II odontoid fracture is reported,and the impact of atlantoaxial joint interlocking on fracture reduction is *** presentation:This case is of a 72-year-old man presented with traumatic atlantoaxial lateral mass joint interlocking without spinal cord signal change,which is confirmed by radiographs and 3 D reconstruction digital *** internal fixation was performed after closed reduction with skull traction was not ***,after many surgical reset failed due to the interlocking of lateral mass joints,we tried to compress the posterior parts of the atlantal and axial screws,the reduction was achieved ***,odontoid bone union and C1/C2 posterior bone graft fusion were obtained at the 12-month ***:To our knowledge,the atlantoaxial lateral mass interlocking is a relatively stable biomechanical *** is like a double-edged sword for the reduction of atlantoaxial dislocation and the secondary spinal cord injury.

关键词： Odontoid fracture Posterior dislocation Atlantoaxial joint interlocking Posterior operation Medical double-edged sword

Systematic Review of Surgical Treatment for stage III kummell's disease:Anterior Approach vs Posterior Osteotomy

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Systematic Review of Surgical Treatment for stage III kummel...

2016年浙江省骨科学学术年会

作者： Chen Zhenzhong Lou Chao he dengwei 丽水市中心医院

Object:Most kummell’s disease have a good healing outcome with PVP or ***,The optimal treatment of stage Ⅲ kummell’s disease has been *** are several surgical options including anterior,posterior,and combined approaches,which are associated with varying degrees of *** aim of this study was to assess the surgery of anterior approach and posterior osteotomy for the treatment of stage Ⅲ kummell’s disease and to compare the two ***:A systematic review of literature on spinal surgery was conducted by searching MEDLINE,EMBASE and Google Scholar with a combination of keywords including "surgery" □ "kummell’s disease", "delayed posttraumatic vertebral osteonecrosis", "vertebral pseudarthrosis", "intravertebral vacuum cleft", "delayed vertebral collapse" and "compression fracture nonunion".Independent reviewers selected the articles for analysis after screening the titles,abstracts,and full texts,then extracted data and graded the quality of each paper according to the Grading of Recommendations,Assessment,Development,and Evaluation(GRADE)***:A total of 1,876 abstracts were identified using various keywords.2 cohort studies and 6 case series were eligible for inclusion,involving a total of 204 cases of stage Ⅲ kummell’s *** were 74 cases in3 studies regarding the clinical evaluation of anterior approach and 130 cases in 7 studies regarding the clinical evaluation of posterior ***:Anterior approach and posterior osteotomy all achieve the improvement of pain,neurological dysfunction and imaging outcomes,and anterior methods seem to have higher complications rates.

关键词： stage Ⅲ kummell’s disease spinal surgery anterior approach posterior osteotomy postoperative outcomes systematic review

Gradient-structure-enhanced dielectric energy storage performance of flexible nanocomposites containing controlled preparation of defective TiO_(2) and ferroelectric KNbO_(3) nanosheets

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Nano Research 2024年第5期17卷 4079-4088页

作者： Yan Wang Lili Zhao Ruicong Chen Wenhui Zhao dengwei Hu Haoran Wang Bin Cui Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory of Physico–Inorganic Chemistry Xi’an Key Laboratory of Functional Supramolecular Structure and MaterialsCollege of Chemistry and Materials ScienceNorthwest UniversityXi’an 710127China School of Information Science and Technology Northwest UniversityXi’an 710127China Engineering Research Center for Titanium Based Functional Materials and Devices in Universities of Shaanxi Province Faculty of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China

Next generation power system needs dielectrics with increased dielectric energy ***,the low energy density of dielectrics limits their ***,an asymmetric trilayered nanocomposite,with a transition layer(TL),an insulation layer(IL),and a polarization layer(PL),is designed based on poly(vinylidene fluoride)-polymethyl methacrylate(PVDF-PMMA)matrix using KNbO_(3)(KN)and TiO_(2)(TO)as the *** morphology and defect control of the two-dimensional nano KN and nano TO fillers are realized via a hydrothermal method to increase the composite breakdown strength(E_(b))and the composite energy density(U_(e)).The asymmetric trilayered structure leads to a gradient electric field distribution,and the KN and TO nanosheets block charges transfer along z *** a result,the development path of the electrical trees is greatly curved,and E_(b) is effectively *** the Ue value of the nanocomposites reaches 17.79 J·cm^(-3) at 523 MV·m^(-1).On the basis,the composite Ue is further improved by defect control in TO *** nanocomposite KN/TO/PVDF-PMMA containing TO with less oxygen vacancy concentration(calcined at oxygen atmosphere)acquires a high Ue of 21.61 J·cm^(-3) at 548 MV·m^(-1).This study provides an idea for improving the energy storage performance by combining the design of the composite dielectric structure and the control of nanofillers’defect and morphology.

关键词： asymmetric trilayered structure two-dimensional energy density oxygen vacancies breakdown strength dielectric

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预应力装配混凝土复合墙板抗震性能试验研究

土木建筑与环境工程 2016年第1期38卷 1-8页

作者：秦士洪何登伟陈鹏张瀑重庆大学山地城镇建设与新技术教育部重点实验室重庆400045 四川省建筑科学研究院成都610081

结合砌体结构的发展现状和住宅产业化的发展趋势,提出一种"预应力装配混凝土复合墙板",以期望在中小城镇低层建筑民用房屋中发展一种新的结构形式来对砌体结构进行补充。为了考察该复合墙板的抗震性能,对2块不同预应力度的试件进行了拟... 详细信息

结合砌体结构的发展现状和住宅产业化的发展趋势,提出一种"预应力装配混凝土复合墙板",以期望在中小城镇低层建筑民用房屋中发展一种新的结构形式来对砌体结构进行补充。为了考察该复合墙板的抗震性能,对2块不同预应力度的试件进行了拟静力试验。得到了相应试件的抗震性能指标,显示该墙板具有较好的承载能力和变形性能,分析认为所提出的墙板可以达到8度区低层民用房屋的应用要求,可以作为砌体承重墙的一种替代形式,并且对该墙板相关构造提出了改进建议。

关键词：预制装配结构抗震性能拟静力试验混凝土复合墙板住宅产业化

OLIF术后过长关节突移位压迫神经根再发下肢痛一例报告

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中华骨科杂志 2023年第17期43卷 1174-1177页

作者：柳世杰刘飞俊何登伟温州医科大学附属第五医院骨科丽水323000

报告1例斜外侧入路椎体融合(oblique lumbar interbody fusion,OLIF)术后过长的关节突移位压迫神经根导致再发下肢痛的病例。女,48岁,诊断为L 4椎体滑脱症。术前CT提示L5右侧上关节突过度增生,长径为10.46 mm,L5右侧上关节突与L4右侧神... 详细信息

报告1例斜外侧入路椎体融合(oblique lumbar interbody fusion,OLIF)术后过长的关节突移位压迫神经根导致再发下肢痛的病例。女,48岁,诊断为L 4椎体滑脱症。术前CT提示L5右侧上关节突过度增生,长径为10.46 mm,L5右侧上关节突与L4右侧神经根的间距仅1.34 mm。在接受OLIF术后短期内即出现右下肢放射痛复发,复查腰椎CT示融合器植入后椎间隙撑开,而L5右侧上关节突向前倾斜的角度由术前59.46°增大至65.22°;关节突至椎间孔前壁的距离由0.63 mm减小至0.25 mm,至椎间孔上壁的距离由0.31 mm增大至0.39 mm;椎间孔截面积则由0.29 mm2减小至0.18 mm2;椎间隙前凸角由0.52°增大至7.33°,均提示L4,5椎间隙不均匀撑开,且L5右侧增生的上关节突向前下倾斜压迫L4右侧神经根。再次微创手术中对增生过长的关节突进行磨除,松解受压神经根,再次手术后患者右下肢放射痛得到缓解。因此,可以认为OLIF手术中椎间隙被不均匀撑开时,异常增生或过长的关节突可导致神经根受压,进而引起术后持续不缓解的下肢根性疼痛。这也要求术者在术前应充分评估关节突增生情况对OLIF手术效果的潜在影响。

关键词：腰椎脊柱融合术手术后并发症神经根病关节突

Percutaneous internal fixation with PKP and simple PKP for thoracolumbar burst fractures of the aged patients:A prospective randomized controlled trial

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Percutaneous internal fixation with PKP and simple PKP for t...

2013年浙江省医学会骨质疏松与骨矿盐疾病分会学术年会暨国家级骨质疏松症和骨质疏松性骨折诊治进展专题研讨会

作者： dengwei he Kejun Zhu Xiaoyong Sheng Ye Zhu WeiYang Yu Feijun Liu 丽水市中心医院温州医学院附属第五医院骨科

Background:The impact of percutaneous internal fixation as a supplement to percutaneous kyphoplasty(PKP) for the management of the thoracolumbar burst fractures of the aged patients is *** conducted a clinical controlled trial to define the effect of percutaneous internal fixation with PKP on thoracolumbar fractures and patientrelated functional outcomes. Method:This study included 43 patients with thoracolumbar burst fractures without nerve injuries who were elder than 65 years *** were randomly assigned to treatment with simple PKP(control group,n=22) and percutaneous short-segment pedicle screw internal fixation with PKP(treatment group,n=21).The patients were followed for at least two years postoperatively and were assessed with regard to clinical and radiological outcomes. Clinical outcomes were evaluated mainly with use of visual pain analog scale(VAS) and questionnaire score of Oswestry disability index(ODI).Radiological outcomes were assessed mainly on the basis of Cobb kyphosis angle and loss of kyphosis correction. Results:There was no significant difference between the two groups with regard to the preoperative indexes. The treatment group had better VAS values and had more postoperative improvements in ODI results as compared with the control group(P he treatment group was superior to that of the control group,and postoperative correction loss was significant less compared with the control group(P he control group,two patients postoperatively suffered refractures in the injured vertebra and one patient had refracture in the adjacent *** operation complications need managements were noted postoperatively in both groups. Conclusions:Compared with simple PKP operation,percutaneous internal fixation with PKP is one kind of more ideal surgical technique for the treatment of selected elderly thoracolumbar burst fractures.

关键词： the elderly patient thoracolumbar burst fracture percutaneous internal fixation simple PKP randomized controlled trial

Cement distribution patterns are associated with recompression in cemented vertebrae after percutaneous vertebroplasty:a retrospective analysis

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Cement distribution patterns are associated with recompressi...

2016年浙江省骨科学学术年会

作者： Chao Lou Weiyang Yu Zhenzhong Chen Kejun Zhu Feijun Liu dengwei he 丽水市中心医院

Purpose The purpose of this study was to develop the traditional classical two cement distribution patterns to four with the aim of revaluating the cement distribution patterns and further comprehensively investigate associations between cement distribution patterns and the occurrence rates of recompression in cemented vertebrae after percutaneous vertebroplasty(PVP).Methods A retrospective study of 224 patients(age range 66-89 years) treated with PVP for a single-level thoracolumbar osteoporotic compression fractures were conducted with a mean follow-up of 21.3 months(13-37 months) from June 2012 to July *** were divided into those without recompression(maintained group,n = 192) and those with recompression(recompressed group,n = 32).Another,patients were divided into four groups according to the cement distribution patterns evaluated on radiography and/or computed tomography:interlocked solid pattern group(group LS,n = 19) and uninterlocked solid pattern group(group ULS,n = 62),compact and solid cement filling pattern but interlocked or uninterlocked with surrounding cancellous bone in vertebrae;contiguous trabecular pattern group(group CT,n = 102) and discontiguous trabecular pattern group(group DCT,n = 41),sponge-like but contiguous or discontiguous cement internal filling *** filled type of responsible area was divided into sufficient filling pattern(SF,n = 184) and insufficient filling pattern(ISF,n= 40).Differences in treatment efficacy and the occurrence rates of recompression in cemented vertebrae were examined and compared for both groups using the Mann-Whitney U test and chi-square *** Recompression in cemented vertebrae was significantly more frequent in solid pattern group than in trabecular pattern group(Phe vertebrae recompression rate in group ULS and group DCT was statistical higher than that in group LS and group CT(Pher frequency of reco

关键词： Cement distribution Vertebroplasty Osteoporotic vertebral compression fracture Recompression

Surgical techniques for fungal spinal infection:A patientlevel pooled analysis of a systematic review

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Surgical techniques for fungal spinal infection:A patientlev...

2016年浙江省骨科学学术年会

作者： Zhenzhong Chen Liangchen Li Liangwei Mei Chao Lou Wenjun Huang Kejun Zhu Weiyang Yu dengwei he 丽水市中心医院

Purpose This study evaluated the clinical efficacy of various surgical approaches for the treatment of fungal spinal infection(FSI).Methods We searched the PubMed and Embase databases to identify surgical treatments for *** information,surgery techniques,and postoperative outcomes were *** Fifty-two publications(72 patients,82 operations) met the inclusion *** age was 47 years;mean follow-up was 18.3 *** methods included the posterior approach(PA),anterior approach(AA),and a combination anterior and posterior approach(APA).Postoperative outcomes including pain and neurological improvements were reported at a higher rate in the AA(96.30%and 94.12%,respectively) and APA(93.75%and 63.64%) groups versus the PA group(83.33%and 44%).Reoperation was required in 12(14.63%) of the 82 operations with reported ***,two of 27 operations(7.41%) with AA compared to eight of 37 patients(21.62%) with PA and two of 18 patients(11.11%) with APA required a *** the final follow-up,61 of 72 patients were still *** Trends of a lower reoperation rate and higher pain and neurological improvement rates was evident in the AA and APA groups,suggesting that both can thoroughly debride and stabilize the *** we cannot definitively say that one approach is superior to the other,based on the data gleaned from this systematic review,we believe that the use of AA and APA may lead to improved *** treating surgeon can choose the approach based on comfort level and patient status.

关键词： Fungal spinal infection surgery systematic review

Association between menopause and lumbar disc degeneration:an MRI study of 1,280 women and 1,280 men

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Association between menopause and lumbar disc degeneration:a...

2016年浙江省骨科学学术年会

作者： Chao Lou Zhenzhong Chen Liangwei Mei Wenjun Huang Kejun Zhu Weiyang Yu dengwei he 丽水市中心医院

Objective:The purpose of this study was to identify and further understand the association between menopause and severity of lumbar disc degeneration from the first lumbar to first sacral vertebra using a magnetic resonance imaging-based eight-level grading ***:The study cohort comprised 1,280 normal women and 1,280 age-matched normal men between January 2010 and August ***,weight,height,age at natural menopause,and years since menopause(YSM)were *** degeneration was assessed using a magnetic resonance imaging-based eight-level grading ***:Young age-matched men are more susceptible to disc degeneration than premenopausal women(P heir age-matched men(P he age,height,and weight effects(P he analysis of covariance indicated a significant difference in each disc level between every two groups(P hen YSM was above 15 years,the significant difference,however,disappeared in each disc level(P > 0.05).Conclusions:Menopause is associated with disc degeneration in the lumbar *** menopause,disc degeneration showed a progressive severity that almost occured in the first 15 YSM,suggesting estrogen deficiency might be a risk factor of disc degeneration in the lumbar *** studies are needed to investigate whether age or menopause plays a more important role in the progression of disc degeneration in the lumbar spine.

关键词： Menopause Degeneration Intervertebral disc Lumbar spine Magnetic resonance imaging

DLP printing of BT/HA nanocomposite ceramic scaffolds using low refractive index BT crystals

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Journal of Materiomics 2024年第5期10卷 1036-1048页

作者： Ruixuan Xue Peimei Yuan Bo Zhao Fei Jing Xuyuan Kou Wangyang Yue Yan wang Dongmei Wang Galhenage Asha Sewvandi dengwei Hu Faculty of Chemistry and Chemical Engineering Baoji University of Arts and SciencesKey Laboratory of Functional Materials of Baoji Engineering Research Center for Titanium Based Functional Materials and DevicesUniversities of Shaanxi Province1 Hi-Tech AvenueBaoji721013ShaanxiChina Department of Materials Science and Engineering Faculty of EngineeringUniversity of MoratuwaKatubeddaSri Lanka

Biological piezoelectric materials have significant potential for bone repair and energy harvesting owing to their excellent biocompatibility and piezoelectric *** BaTiO3/Ca10(PO4)6(OH)2(BT/HA)composite material is an outstanding representative of biological piezoelectric materials,which has not been individually designed using digital light processing(DLP)3D printing because of the large difference in the refractive index of its ***,in this work,double-sided-tooth plate-like BT crystals with high curvature were prepared via a hydrothermal process,and BT/HA ceramic slurries were grinded out using dispersed intermittent ball milling scheme,and BT/HA nanocomposite ceramic scaffolds were fabricated by DLP 3D printing *** nanostructure,dielectric properties,and piezoelectric energy harvesting performance of the BT/HA nanocomposite ceramic scaffolds were *** influences of different morphologies and contents for BT on the piezoelectric potential and stress distribution were analyzed based on a multi-physics coupling finite element *** cell proliferation and adhesion abilities were investigated *** BT/HA nanocomposite ceramic scaffolds present excellent dielectric properties,cell proliferation and adhesion abilities,and an open circuit voltage of 8 V during piezoelectric energy *** material properties and multi-physics coupling finite element analysis imply that the double-sided-tooth plate-like BT plays an important role for the fastness structure and electric field distribution in the BT/HA ***,this work provides a strategy for the application of the customized BT/HA nanocomposite ceramic scaffolds in new-generation orthopedic implants and biological energy harvesting.

关键词： 3D printing BT/HA nanocomposite ceramics Bio-piezoelectric scaffolds Energy harvesting