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| 1 | Computer navigation-assisted minimally invasive percutaneous screw placement for pelvic fractures显示文摘Pelvic fractures are often caused by high-energy injuries and accompanied by hemodynamic instability.Traditional open surgery has a large amount of bleeding,which is not suitable for patients with acute pelvic fracture.Navigationguided,percutaneous puncture-screw implantation has gradually become a preferred procedure due to its advantages,which include less trauma,faster recovery times,and less bleeding.However,due to the complexity of pelvic anatomy,doctors often encounter some problems when using navigation to treat pelvic fractures.This article reviews the indications,contraindications,surgical procedures,and related complications of this procedure for the treatment of sacral fractures,sacroiliac joint injuries,pelvic ring injuries,and acetabular fractures.We also analyze the causes of inaccurate screw placement.Percutaneous screw placement under navigational guidance has the advantages of high accuracy,low incidence of complications and small soft-tissue damage,minimal blood loss,short hospital stays,and quick recovery.There is no difference in the incidence of complications between surgeries performed by new doctors and experienced ones.However,computer navigation technology requires extensive training,and attention should be given to avoid complications such as screw misplacement,intestinal injury,and serious blood vessel and nerve injuries caused by navigational drift. | Tong Yu Xue-Liang Cheng Yang Qu Rong-Peng Dong Ming-Yang Kang Jian-Wu Zhao | 2020 | World Journal of Clinical Cases2020，8，12： | 18 |
| 2 | Earth pressure balance control for EPB shield显示文摘This paper mainly deals with the critical technology of earth pressure balance (EPB) control in shield tunneling. On the assumption that the conditioned soil in the working chamber of the shield is plasticized, a theoretical principle for EPB control is proposed. Dynamic equilibrium of intake volume and discharge volume generated by thrust and discharge is modeled theoretically to simulate the earth pressure variation during excavating. The thrust system and the screw conveyor system for earth pressure control are developed based on the electro-hydraulic technique. The control models of the thrust speed regulation of the cylinders and the rotating speed adjustment of the screw conveyor are also presented. Simulation for earth pressure control is conducted with software AMESim and MATLAB/Simulink to verify the models. Experiments are carried out with intake control in clay soil and discharge control in sandy gravel section, respectively. The experimental results show that the earth pressure variations in the working chamber can be kept at the expected value with a practically acceptable precision by means of real-time tuning the thrust speed or the revolving speed of discharge system. | YANG HuaYong SHI Hu GONG GuoFang HU GuoLiang | 2009 | Science China(Technological Sciences)2009，52，10： | 17 |
| 3 | Mobility Analysis of the Deployable Structure of SLE Based on Screw Theory显示文摘Scissor-like element has a number of applications in deployable structures such as planar deployable structure (PDS) and ring deployable structure(RDS). However, the mobility analysis of the multi-loop deployable structures is made more difficulty by the traditional mobility formula, because the deployable structure is a very complex structure with multi-loop. Therefore, On the basis of screw theory, the calculation method of mobility of deployable structures of SLE is thoroughly discussed. In order to investigate the mobility, decomposing and composing structures(DCS) are developed, and the basic units are able to be obtained. On the basis of the deployable structures' geometrical characteristics, there exists a closed-loop quadrilateral structure and some non-closed-loop quadrilateral structures in PDS. Also, a six legs parallel structure is present in RDS. The basic units' mobility can be solved by both the methods of screw theory and topology constraint graphs. Then, composing the related basic units, the formula of planar deployable structures' mobility can be built and solves the mobility of ring deployable structure. The analysis method solves the mobility analysis of the multi-loop deployable structures which is difficulty by the traditional method, and plays an important role in further research about the mobility of other complex deployable structures. | SUN Yuantao WANG Sanmin LI Jianfeng ZHI Changjian | 2013 | Chinese Journal of Mechanical Engineering2013，26，4： | 14 |
| 4 | 股骨近端防旋髓内钉内固定微创治疗股骨粗隆间骨折临床研究显示文摘为进一步提高和完善股骨粗隆间骨折(intertrochanteric fracture,ITF)的临床治疗,本次研究于选取住院并接受手术治疗的80例股骨粗隆间骨折患者,对比股骨近端防旋髓内钉(proximal femoral nail anti-rotation,PFNA)内固定微创与动力髋螺钉(dyramic hip screw,DHS)治疗临床差异性分析,现将结果报告如下。 | 戴海 黄宗贵 吴永祥 | 2017 | 山西医药杂志2017，46，23： | 8 |
| 5 | Numerical simulation of particle flow behavior in a screw conveyor using the discrete element method显示文摘Particle motion in a screw conveyor was simulated w让h the discrete element method. The particle flow behavior and transport processes at different screw rotating speeds and filling levels were investigated in this study. The spatial distributions of particle velocity were predicted. The predicted mass flow rate increased w让h increasing screw rotating speed and filling level. The contact forces and granular temperatures of particles were also calculated. The simulation results showed that the translational granular particle temperatures were higher than the rotational granular particle temperatures. In add让ion, the configurational temperatures of particles were calculated from simulated instantaneous particle overlaps, and results indicated that deformation of elastic particles contributed to the rate of energy dissipation. Good agreement between the numerical simulation and experimental results was achieved in this study. | Shuyan Wang Haolong Li Ruichao Tian Ruichen Wang Xu Wang Qiji Sun jiawei Fan | 2019 | Particuology2019，17，2： | 7 |
| 6 | Techniques and accuracy of thoracolumbar pedicle screw placement显示文摘Pedicle screw instrumentation has been used to stabilize the thoracolumbar spine for several decades. Although pedicle screws were originally placed via a freehand technique, there has been a movement in favor of pedicle screw placement with the aid of imaging. Such assistive techniques include fluoroscopy guidance and stereotactic navigation. Imaging has the benefit of increased visualization of a pedicle's trajectory, but can result in increased morbidity associated with radiation exposure, increased time expenditure, and possible workflow interruption. Many institutions have reported high accuracies with each of these three core techniques. However, due to differing definitions of accuracy and varying radiographic analyses, it is extremely difficult to compare studies side-by-side to determine which techniques are superior. From the literature, it can be concluded that pedicles of vertebrae within the mid-thoracic spine and vertebrae that have altered morphology due to scoliosis or other deformities are the most difficult to cannulate. Thus, spine surgeons would benefit the most from using assistive technologies in these circumstances. All other pedicles in thethoracolumbar spine should theoretically be cannulated with ease via a free-hand technique, given appropriate training and experience. Despite these global recommendations, appropriate techniques must be chosen at the surgeon's discretion. Such determinations should be based on the surgeon's experience and the specific pathology that will be treated. | Varun Puvanesarajah Jason A Liauw Sheng-fu Lo Ioan A Lina Timothy F Witham | 2014 | World Journal of Orthopedics2014，5，2： | 7 |
| 7 | 光固化技术制作新型个体化下颈椎椎弓根置钉钻孔导板:一项体外研究显示文摘近二十年来,随着钉棒钢板固定技术的兴起,下颈椎(C3-C7)后路固定手术得到了广泛开展。生物力学研究表明,颈椎椎弓根螺钉(cervical pedicle screw,CPS)固定较侧块螺钉有更强的稳定性,但CPS置入仍面临技术上的挑战。目前涌现出很多精确置钉方法,包括徒手技术、X线透视引导技术、影像导航手术技术等。其中徒手技术主要基于解剖标志和形态学角度测量均值来辅助CPS置入, | Bundoc RC Delgado GG Grozman SA 白朝晖 王建华 | 2017 | 中国骨科临床与基础研究杂志2017，9，3： | 6 |
| 8 | Un displaced subtle ligamentous Lisfranc injuries, con servative or surgical treatment with percutaneous position screws?显示文摘Purpose: Un displaced subtle ligamentous Lisfranc injuries are easy to miss or underestimate, and many cases are treated without surgical fixation. It has not yet widely known whether conservative treatment for undisplaced subtle ligamentous Lisfranc injuries may lead to a poor outcome. The purpose of this study is to compare the outcomes of conservative versus surgical management (percutaneous position screw) of undisplaced subtle ligamentous Lisfranc injury. Methods: We analysed 61 cases in this retrospective study, including 38 males and 23 females. Forty-one patients were managed conservatively, while 20 patients received surgical treatment involving minimal invasive percutaneous pos让ion screw. American orthopaedic foot &ankle society (AOFAS), foot function index (FFI, including FFI disability, FFl pain score and activity limitation scale) scores, Maryland foot score and short form-36 (SF-36) were recorded and compared after a follow-up of 10-16 months (average 12.3). Results: Patients in the surgical management group had higher scores in all evaluation methods (p < 0.05). The complications in the conservative management group had higher incidenee, mainly including secondary diastasis (34.1% vs. 5.0%), joint stiffness after 3 months (82.9% vs. 0%), and secondary arthrodesis (12.2% vs. 0%). The highest rate of complication in surgical management group was temporary forefoot pain (55.0%). Conclusion: The results of this study suggest that the outcomes of the surgical management with percutaneous position screw fixation are better than the conservative management to treat undisplaced subtle ligamentous Lisfranc injuries. This study can serve as a resource for orthopaedic surgeons in recog nizing and man aging such injuries. | Wei Ren Hai-Bo Li Ji-Ke Lu Yong-Cheng Hu | 2019 | Chinese Journal of Traumatology2019，22，4： | 5 |
| 9 | Management of syndesmotic injuries:What is the evidence?显示文摘Ankle fractures are accompanied by a syndesmotic injury in about 10% of operatively treated ankle fractures. Usually, the total rupture of the syndesmotic ligaments with an external rotation force is associated with a Weber type B or C fracture or a Maisonneuve fracture. The clinical assessment should consist of a comprehensive history including mechanism of injury followed by a specific physical examination. Radiographs, and if in doubt magnetic resonance imaging, are needed to ascertain the syndesmotic injury. In the case of operative treatment the method of fixation, the height and number of screws and the need for hardware removal are still under discussion. Furthermore, intraoperative assessment of the accuracy of reduction of the fibula in the incisura using fluoroscopy is difficult. A possible solution might be the assessment with intraoperative three-dimensional imaging. The aim of this article is to provide a current concepts review of the clinical presentation, diagnosis and treatment of syndesmotic injuries. | Marc Schnetzke Sven Y Vetter Nils Beisemann Benedict Swartman Paul A Grützner Jochen Franke | 2016 | World Journal of Orthopedics2016，7，11： | 4 |
| 10 | Trans-sacral screw fixation in the treatment of high dyplastic developmental spondylolisthesis显示文摘We describe the case of a 67-year-old woman with L5-S1 ontogenetic spondylolisthesis treated with pedicle fixation associated with interbody arthrodesis performed with S1-L5 trans-sacral screwing according to the technique of Bartolozzi. The procedure was followed by a wide decompressive laminectomy. The patient had a progressive improvement of the symptoms which gradually disappeared in 12 mo. The radiograph at 6 and 12 mo showed complete fusion system. The choice of treatment in L5-S1 ontogenetic spondylolithesis is related to a correct clinical and diagnostic planning(X-ray, computer tomography magnetic resonance imaging, Measurement). In particular, the severity index and the square of unstable zone, and the standard measurements already described in the literature, are important to understand and to plane the correct surgical strategy, that require, in most of the times, fusion and interbody artrodesis. | Alessandro Landi Nicola Marotta Cristina Mancarella Roberto Tarantino Roberto Delfini | 2013 | World Journal of Clinical Cases2013，1，3： | 4 |
| 11 | Configuration synthesis of planar folded and common overconstrained spatial rectangular pyramid deployable truss units显示文摘Compared with non-overconstrained deployable units, overconstrained deployable units are widely used in space missions for their higher stiffness characteristics. Besides the performance of a three-step topological structural analysis and design of the rectangular pyramid deployable truss unit(PDTU), conducting a structural synthesis of an overconstrained deployable unit requires the determination of the relative position and direction of each kinematic axis. The structural synthesis of an overconstrained deployable unit is investigated based on screw theory and its topological structure. The possible overconstrained cases of the rectangular PDTUs are analyzed, and corresponding screw expressions are obtained. Thus, the rectangular PDTUs, which can be folded into a plane, are synthesized systemically, and a series of overconstrained rectangular PDTUs is obtained. Furthermore, the feasibility of the folded and deployed motions under one degree of freedom for those deployable units is verified in dynamical simulation by using ADAMS 2010. | Hui YANG Hongwei GUO Yan WANG Rongqiang LIU Zongquan DENG | 2019 | Chinese Journal of Aeronautics2019，32，7： | 4 |
| 12 | Comparison of Efficacy between 3D Navigation-Assisted Percutaneous Iliosacral Screw and Minimally Invasive Reconstruction Plate in Treating Sacroiliac Complex Injury显示文摘The clinical efficacy was compared between 3D navigation-assisted percutaneous iliosacral screw(3DPS)and minimally invasive reconstruction plate(MIRP)in treating sacroiliac complex injury and the surgical procedures of 3DPS were introduced.A retrospective analysis was performed on 49 patients with sacroiliac complex injury from March 2013 to May 2017.Twenty-one cases were treated by 3DPS,and 28 cases by MIRP.Intraoperative indexes as operative time,blood loss,incision length,length of hospital stay and postoperative complications were respectively documented.Quality of reduction was postoperatively evaluated by Matta radiological criteria,and clinical effect was assessed by Majeed scoring criteria at the last followup.Operative time and hospital stay were significantly shortened,and blood loss,and incision length were significantly reduced in 3DPS group as compared with those in MIRP group(P<0.05).No statistically significant difference was found between 3DPS group and MIRP group in the assessment of reduction and function(P>0.05).It was concluded that both 3DPS and MIRP can effectively treat the sacroiliac complex injury,and 3DPS can provide an accurate,safe and minimally invasive fixation with shorter operative time and hospital stay. | Qi-lin LU Yi-liang ZHU Xu-gui LI Wei XIE Xiao-zhen WANG Xue-zhen SHAO Xian-hua CAI Xi-ming LIU | 2019 | Current Medical Science2019，39，1： | 3 |
| 13 | Performance study on three-stage power system of compressed air vehicle based on single-screw expander显示文摘A new compressed-air engine system based on three-stage single screw expander was proposed to improve the performance of power system.Three different structure styles were presented,and the studies on the power performance and the distribution of expansion ratios between stages were carried out by programming and mathematical modeling of each style.Research results indicated that the best matches of expansion ratios with equal heat temperature for the air tank of pressure 30 MPa were seven-five-three for'first-stage heating'style,eight-five-three for'two-stage heating'style and five-five-four for'three-stage heating'style,respectively.Results also showed that heating up inlet air or increasing the expander efficiency might improve the power performance.The output power of the'two-stage heating'style is far higher than that of'first-stage heating'style and is a little lower than that of'three-stage heating'style.The new system showed good structure and power performances. | HE Wei,WU YuTing ,MA ChongFang&MA GuoYuan Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education,and Key Laboratory of Heat Transfer and Energy Conversion,Beijing Municipality,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China | 2010 | Science China(Technological Sciences)2010，53，8： | 3 |
| 14 | 联轴器螺栓紧固件的有限元建模仿真和试验分析(英文)显示文摘The aim of this paper is to study the stress status of the bolt fastener in coupling under complex load-ings, the research result is greatly beneficial for the analysis of the failure of the screw bolt in coupling. Thethreads in the bolt and nut are modeled with accurately construct helical thread geometry and implanted into theANSYS software. Research shows that the model has the ability to simulate the preload of bolt, equivalent stress ofcoupling under load, and structure stress of the screw bolt in coupling. The finite element results agree with theexperimental observations quantitatively. In addition, the fatigue strength and the self relaxation of the screw boltare more sensitive to the torsional load, which can provide reference for further research on the failure of screw bolt. | Ai-cheng ZOU Xiang-jun JIANG | 2016 | 机床与液压2016，44，6： | 3 |
| 15 | Min-invasive surgical treatment for multiple axis fractures: A case report显示文摘BACKGROUND Fractures of the axis are commonly seen in spinal injuries. Upper cervical fractures are usually managed conservatively. However, the complications due to long-term external immobilization cannot be ignored. The traditional open surgery has the disadvantages of too much blood loss and soft tissue injury. The aim of our paper is to introduce a minimally invasive surgical treatment for multiple axis fractures.CASE SUMMARY We report a 40-year-old Chinese male who had severe neck pain and difficult neck movement after falling from 3 meters. X-ray and computed tomography(CT) scan revealed an axis injury consisting of an odontoid Type Ⅲ fracture associated with a Hangman fracture categorized as a Levine-Edwards Type Ⅰ fracture. The patient underwent anterior odontoid screw fixation and posterior percutaneous screw fixation using intraoperative O-arm navigation. Neck pain was markedly improved after surgery. X-rays and CT scan reconstructions of 3-mo follow-up showed good stability and fusion. The range of cervical motion was well preserved.CONCLUSION Anterior odontoid screw fixation and posterior direct C2 percutaneous pedicle screw fixation with the aid of O-arm navigation and neurophysiological monitoring can be an interesting alternative option for complicated multiple axis fractures. | Xuan-Chen Zhu Yi-Jie Liu Xue-Feng Li Han Yan Ge Zhang Wei-Min Jiang Hou-Yi Sun Hui-Lin Yang | 2019 | World Journal of Clinical Cases2019，7，7： | 3 |
| 16 | 内踝截骨入路空心加压螺钉治疗距骨颈骨折显示文摘目的 探讨经内踝截骨入路空心加压螺钉固定治疗距骨颈骨折的方法及临床效果.方法 回顾分析2004年至2008年距骨颈骨折28例,HawkinsⅡ型19例,Ⅲ型9例,均采用经内踝截骨入路空心加压螺钉治疗.结果 根据Hawkins评分:本组优18例,良7例,可1例,差2例.结论 经内踝截骨入路空心加压螺钉固定是治疗复杂距骨颈骨折的有效方法. | 闫瑞承 钟俊 陈亮 | 2009 | 临床外科杂志2009，17，11： | 3 |
| 17 | Geometric error analysis of an over-constrained parallel tracking mechanism using the screw theory显示文摘This paper deals with geometric error modeling and sensitivity analysis of an overconstrained parallel tracking mechanism. The main contribution is the consideration of overconstrained features that are usually ignored in previous research. The reciprocal property between a motion and a force is applied to tackle this problem in the framework of the screw theory. First of all, a nominal kinematic model of the parallel tracking mechanism is formulated. On this basis, the actual twist of the moving platform is computed through the superposition of the joint twist and geometric errors. The actuation and constrained wrenches of each limb are applied to exclude the joint displacement. After eliminating repeated errors brought by the multiplication of wrenches, a geometric error model of the parallel tracking mechanism is built. Furthermore,two sensitivity indices are defined to select essential geometric errors for future kinematic calibration. Finally, the geometric error model with minimum geometric errors is verified by simulation with SolidWorks software. Two typical poses of the parallel tracking mechanism are selected, and the differences between simulation and calculation results are very small. The results confirm the correctness and accuracy of the geometric error modeling method for over-constrained parallel mechanisms. | Jiateng ZHANG Binbin LIAN Yimin SONG | 2019 | Chinese Journal of Aeronautics2019，32，6： | 2 |
| 18 | Acetabular components with or without screws in total hip arthroplasty显示文摘AIM To compare the operation time, blood loss, and early outcomes of acetabular components with and without the screw.METHODS Thirty patients who underwent cementless acetabular component with or without screw and whose follow-up exceeded one year period in total hip arthroplasty were evaluated. A posterior approach was used in all surgical procedures by one experienced surgeon. Demographic data, operation time, intra-and postoperative blood loss volume, follow-up clinical score, cup migration, and osteolysis were recorded. The Kolmogorov-Smirnov test was performed for testing the normality of study data. Mann-Whitney U test was used to analyze the intergroup differences. A P-value of ≤ 0.05 was considered statistically significant.RESULTS Acetabular components were used in 16(53.3%) patients with screw and 14(46.7%) without screw. After one year of follow-up, an osteolytic lesion of 3 mm was found in only one patient in the screw group. No cup migrationwas encountered. Intra-group mean Harris hip score significantly increased, but there was no significant intergroup difference. While the mean operation time of the screw group was 121.8 min(range; 95-140), it was 102.7 min(range; 80-120) in the no-screw group, and this difference was statistically significant(P = 0.002). The mean intraoperative/postoperative, and total blood loss were 556.6 mL(range: 350-800)/423.3 mL(range: 250-600), and 983.3 mL(range: 600-1350), respectively in the screw group; and 527 mL(range: 400-700)/456 mL(range: 230-600), and 983 mL(range: 630-1250), respectively in the no-screw group. The blood loss difference between the two groups was not significant. In the screw group, the operation time was 19.1 min longer than the no-screw group, and this difference was statistically significant.CONCLUSION Acetabular components with or without screw have similar results, but the use of screw increases the operation time significantly, while not changing the blood loss volume. | Murad Pepe Onur Kocadal Tamer Erener Kubilay Ceritoglu Ertugrul Aksahin Cem Nuri Aktekin | 2017 | World Journal of Orthopedics2017，8，9： | 2 |
| 19 | RF椎弓根螺钉系统复位内固定并椎间植骨融合术治疗腰椎滑脱症显示文摘目的 探讨RF椎弓根螺钉系统复位内固定并椎间植骨融合术治疗腰椎滑脱症的效果.方法 自2000年2月至2008年2月,采用RF椎弓根螺钉系统复位内固定并椎间植骨融合术治疗并获得随访的真性腰椎滑脱症37例,其中Ⅰ度滑脱6例,Ⅱ度滑脱27例,Ⅲ度滑脱4例.滑脱节段:第3腰椎(L3)滑脱3例,L4滑脱9例,L5滑脱25例.结果 所有患者术后随访12~38个月,平均32.7个月.根据侯树勋等制定的疗效评定标准及融合率:优31例,良4例,可2例,优良率94.6%.术中并发症1例,发生率为2.7%.手术完全复位率88.9%,椎间融合率100%.结论 RF椎弓根螺钉系统复位内固定并椎间植骨融合术能使腰椎滑脱得到较为确实的复位和固定,脊柱融合率高,临床效果满意. | 陈治权 王义生 | 2010 | 中国实用医刊2010，37，9： | 2 |
| 20 | 英文技术图纸缩略语的破译显示文摘在引进设备图纸及其材料明细表中,尤其是从英语国家引进的图纸中,有许多缩略语。它们或单独出现,或成串夹杂在短句中,或组成短句。这些缩略语不仅数量多,而且大都没有上下文可供联系判断,常常使人不解其意。 英语国家有关部门早已注意到这个问题。如美国国家标准协会曾公布过ANSI Y1.1《图文缩略语标准》,并指出其目的在于“规定标准缩略语,而不是促进其应用”。缩略语有节省篇幅,简洁明了等优点。 | 吴序木 | 1991 | 上海翻译1991，，2： | 2 |
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