Finite element analysis of the screw in percutaneous axial lumbosacral interbody fusion.


OBJECTIVE:To establish a three-dimensional finite element model of the L(5)/S(1) motion segment with percutaneous axial lumbosacral screw and analyze the biomechanical stress on the screw. METHODS:With the help of related software and the Mechanical Virtual Human of China, a three-dimensional finite element model was established. Three different loading conditions on the screw were analyzed with this model. RESULTS:Peak stresses on the screw under three loading conditions were 175.334 MPa, 183.765 MPa and 146.237 MPa, respectively. Generally, stress values were relatively low. The stress values were relatively high at the point of interbody fusion and middle part of the screw, all the highest values being localized to the upper and lower threads closest to the middle part. Comparison among the three conditions showed that torque load was the greatest, followed by vertical load, with lateral bending being the least. CONCLUSION:Percutaneous axial lumbosacral screw easily meets normal loading conditions and may be an effective method for lumbosacral fusion.


Orthop Surg


Orthopaedic surgery


Xu HG,Yang XM,Wu TL,Wang H,Chen XW,Wang LT,Jin S,Liu P




Has Abstract


2010-08-01 00:00:00












  • Bone Hardness of Different Anatomical Regions of Human Radius and its Impact on the Pullout Strength of Screws.

    abstract:OBJECTIVE:To investigate the bone hardness of different anatomical regions of the human radius and its impact on the pullout strength of screws. METHODS:Fresh radius bones were obtained from three donated cadavers. They were divided into three parts: proximal metaphysis, shaft, and distal metaphysis. The proximal meta...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Wu WW,Zhu YB,Chen W,Li S,Yin B,Wang JZ,Zhang XJ,Liu GB,Hu ZS,Zhang YZ

    更新日期:2019-04-01 00:00:00

  • Comparison of biomechanical properties of single- and two-segment fusion for Denis type B spinal fractures.

    abstract:OBJECTIVE:To compare the biomechanical properties of single- and two-segment fusion for Denis type B spinal fracture. METHODS:Two female patients with Denis type B L1 vertebral fractures were studied. Both patients had achieved intervertebral fusion by 1 year postoperatively, at which time CT data were collected, incl...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Su YS,Ren D,Wang PC

    更新日期:2013-11-01 00:00:00

  • Simultaneous intra-operative repair for inadvertent dural tear under posterior lumbar disk scope.

    abstract:OBJECTIVE:To introduce a microsurgical suture technique for repair of dural tear under posterior lumbar disk scope. METHODS:Micro endoscopic discectomy was performed on a 26-year-old male under local anesthesia. During the operation, an irregular tear of about 1.0 cm was inadvertently made in the dura.The cauda equina...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Sun MJ,Gao SM,Wang YH

    更新日期:2011-08-01 00:00:00

  • Cerebrospinal fluid leakage during anterior approach cervical spine surgery for severe ossification of the posterior longitudinal ligament: prevention and treatment.

    abstract:OBJECTIVE:The prevention and treatment of the common complication of cerebrospinal fluid leakage (CSFL) during anterior approach cervical spine surgery for severe ossification of the posterior longitudinal ligament (OPLL) is documented. METHOD:A retrospective analysis of 47 patients with severe cervical OPLL aged 39 t...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Lei T,Shen Y,Wang LF,Cao JM,Ding WY,Ma QH

    更新日期:2012-11-01 00:00:00

  • Novel cartilage-derived biomimetic scaffold for human nucleus pulposus regeneration: a promising therapeutic strategy for symptomatic degenerative disc diseases.

    abstract::Because current therapies have not always been successful and effective, the possibility of regenerating the nucleus pulposus (NP) through a tissue-engineered construct offers a novel therapeutic possibility for symptomatic degenerative disc diseases (DDDs). However, more research is necessary to identify the optimal ...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Yang Q,Zhao YH,Xia Q,Xu BS,Ma XL,Liu Y,Hu YC,Li HF,Miao J,Wang T,Ma JX,Sun XL

    更新日期:2013-02-01 00:00:00

  • Intra-articular Adjuvant Analgesics following Knee Arthroscopy: Comparison between Single and Double Dose Dexmedetomidine and Ropivacaine A Multicenter Prospective Double-blind Trial.

    abstract:OBJECTIVE:Knee arthroscopy is a commonly performed orthopedic procedure. Post-operatively, adequate pain relief reduces the surgical stress response and patient's morbidity and facilitates rehabilitation. The analgesic effect of dexmedetomidine (2 μg/kg body weight) as an adjunct to ropivacaine in knee arthroscopic kne...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章,多中心研究,随机对照试验


    authors: Panigrahi R,Roy R,Mahapatra AK,Prasad A,Priyadarshi A,Palo N

    更新日期:2015-08-01 00:00:00

  • Minimally Invasive Transforaminal Lumbar Interbody Fusion and Unilateral Fixation for Degenerative Lumbar Disease.

    abstract:OBJECTIVE:To evaluate the clinical effect of the minimally invasive transforaminal lumbar interbody fusion combined with posterolateral fusion and unilateral fixation using a tubular retractor in the management of degenerative lumbar disease. METHODS:A retrospective analysis was conducted to analyze the clinical outco...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Wang HW,Hu YC,Wu ZY,Wu HR,Wu CF,Zhang LS,Xu WK,Fan HL,Cai JS,Ma JQ

    更新日期:2017-08-01 00:00:00

  • An Eight-Year Follow-Up Study on the Treatment of Single-Level Cervical Spondylosis Through Intervertebral Disc Replacement and Anterior Cervical Decompression and Fusion.

    abstract:OBJECTIVE:To compare the efficacy and safety of the postoperative long-term effect of the treatment of single-level cervical spondylosis through anterior cervical discectomy and fusion (ACDF) and artificial cervical disc replacement (ACDR). METHODS:This is a retrospective contrastive study, which was conducted for the...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Guo H,Sheng J,Sheng WB,Liang WD,Wang J,Xun CH

    更新日期:2020-06-01 00:00:00

  • Transforaminal Endoscopic Discectomy and Foraminoplasty for Treating Central Lumbar Stenosis.

    abstract:OBJECTIVE:Lumbar spinal stenosis is a medical condition characterized by the narrowing of the spinal canal as a consequence of bone and soft tissue degeneration, including disc herniation, facet and ligamentum flavum hypertrophy, and osteophyte formation. The percutaneous transforaminal endoscopic discectomy (PTED) tec...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Bao BX,Zhou JW,Yu PF,Chi C,Qiang H,Yan H

    更新日期:2019-12-01 00:00:00

  • Joint-Preserving Surgery for Talar Malunions or Nonuions.

    abstract:OBJECTIVE:To describe the technique and analyze the outcomes of joint-preserving surgical treatments which included anatomical reconstruction or alignment correction for talar malunions or nonunions, and avoid development of degenerative changes in the adjacent joints. METHODS:Eight patients who had painful talar malu...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Chen G,Hu M,Xu Y,Zhen YH,Hong Y,Xu XY

    更新日期:2017-02-01 00:00:00

  • Surgical Experience and Complications in 50 Patients Treated with an Anular Closure Device Following Lumbar Discectomy.

    abstract:OBJECTIVE:To examine the results of an anular closure device for prevention of lumbar disc reherniation in daily routine practice. METHODS:Fifty patients with large anular defects were treated with limited discectomy and a bone-anchored anular closure device. The device physically occludes the defect in the anulus fib...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Ardeshiri A,Miller LE,Synowitz M,Jadik S

    更新日期:2019-06-01 00:00:00

  • Compensatory Mechanism of Maintaining the Sagittal Balance in Degenerative Lumbar Scoliosis Patients with Different Pelvic Incidence.

    abstract:OBJECTIVE:To investigate the compensatory mechanism of maintaining the sagittal balance in degenerative lumbar scoliosis patients with different pelvic incidence (PI). METHODS:This was a retrospective imaging observation study. Patients in our department with degenerative lumbar scoliosis between 2017 and 2019 were re...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Liu C,Hu FQ,Hu WH,Song K,Jiao GL,Zheng GQ,Zhang XS,Li ZZ

    更新日期:2020-12-01 00:00:00

  • Recurrence analysis in 66 cases with grade I and grade II chondrosarcomas in the extremities.

    abstract:OBJECTIVE:We analyzed chondrosarcomas in long bones to assess whether Grade I and II chondrosarcomas should both be grouped as low grade malignant tumors (musculoskeletal Tumor Society Stage I or Stage II), and to explore rational surgical treatment for Grade I and II chondrosarcomas. METHODS:We retrospectively review...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Ma XJ,Dong Y,Zhang CL,Zeng BF

    更新日期:2009-05-01 00:00:00

  • Isthmus-guided cortical bone trajectory for pedicle screw insertion.

    abstract::Herein is described cortical bone trajectory (CBT), a new path for pedicle screw insertion for lumbar vertebral fusion. Because the points of insertion are under the end of the inferior articular process, and because the screws are inserted toward the lateral side, there is less soft tissue development than with the c...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Iwatsuki K,Yoshimine T,Ohnishi Y,Ninomiya K,Ohkawa T

    更新日期:2014-08-01 00:00:00

  • Intramedullary Nail Fixation Assisted by Orthopaedic Robot Navigation for Intertrochanteric Fractures in Elderly Patients.

    abstract:OBJECTIVE:To compare the clinical efficacy of intramedullary nail fixation for intertrochanteric fractures assisted by orthopaedic robot navigation and the traditional intramedullary nail fixation in elderly patients, and to investigate the application advantages of intramedullary nail fixation for femoral intertrochan...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Lan H,Tan Z,Li KN,Gao JH,Liu TH

    更新日期:2019-04-01 00:00:00

  • A Radiographic Measurement of the Anterior Epidural Space at L4-5 Disc Level.

    abstract::To observe the morphology character of the anterior epidural space at the L4-5 disc level and to provide an anatomical basis for safely and accurately performing a percutaneous endoscopic lumbar discectomy (PELD). Fifty-five cases with L5 S1 lumbar disc herniation were included in this study, and cases with L4-5 disea...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Xu RS,Wu JS,Lu HD,Zhu HG,Li X,Dong J,Yuan FL

    更新日期:2017-05-01 00:00:00

  • Corrections of lower limb deformities in patients with diastrophic dysplasia.

    abstract:OBJECTIVE:Accurate understanding of the cause of the underlying pathology in children with diastrophic dysplasia would help in designing targeted management of their locomotion. METHODS:Diastrophic dysplasia was diagnosed in twelve patients (nine girls and three boys; age range 1-14 years), all of whom presented with ...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Al Kaissi A,Kenis V,Melchenko E,Chehida FB,Ganger R,Klaushofer K,Grill F

    更新日期:2014-11-01 00:00:00

  • Comparative Study of Percutaneous Sacroiliac Screw with or without TiRobot Assistance for Treating Pelvic Posterior Ring Fractures.

    abstract:OBJECTIVES:To analyze the curative effect of TiRobot surgical robotic navigation and location system-assisted percutaneous sacroiliac screw fixation and percutaneous sacroiliac screw by traditional fluoroscopy, and to summarize the safety and benefits of TiRobot. METHODS:A total of 91 patients with pelvic posterior ri...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Long T,Li KN,Gao JH,Liu TH,Mu JS,Wang XJ,Peng C,He ZY

    更新日期:2019-06-01 00:00:00

  • Internal Fixation versus Hemiarthroplasty in the Treatment of Unstable Intertrochanteric Fractures in the Elderly: A Systematic Review and Meta-Analysis.

    abstract:OBJECTIVE:To evaluate the clinical efficacy of internal fixation versus hemiarthroplasty in the treatment of unstable intertrochanteric fractures in the elderly. METHODS:A search was conducted in PubMed, Web of Science, Embase, and Cochrane Library databases up to April 2020. The present study compared internal fixati...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章,评审


    authors: Tu DP,Liu Z,Yu YK,Xu C,Shi XL

    更新日期:2020-08-01 00:00:00

  • Reconstruction of a Distal Foot Skin Defect Using an Intermediate Dorsal Neurocutaneous Flap.

    abstract:OBJECTIVE:To present the use of an intermediate dorsal neurocutaneous flap for the reconstruction of defects on the distal foot. METHODS:From September 2016 to October 2018, five patients (mean age at operation 33.8 years; range, 7-70 years; female/male = 2/3) with skin defects on one of their feet caused by road-traf...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Liu S,Tan J,Tao S,Duan Y,Hu X,Li Z

    更新日期:2020-04-01 00:00:00

  • Comparison of Different Insertion Techniques for Lumbosacral Fixation Improvement: A Finite Element Study.

    abstract:OBJECTIVE:We create a new S1 cortical screw trajectory technique using 3D reconstruction and the finite element (FE) method to provide a more reliable theoretical basis for clinical practices and to advance internal fixation technology for treatment of lumbosacral degenerative diseases. METHODS:This retrospective stud...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Han DP,Wang JY

    更新日期:2020-02-01 00:00:00

  • One-stage anterior release and reduction with posterior fusion for treatment of irreducible atlantoaxial dislocation.

    abstract:OBJECTIVE:To analyze the approach and feasibility of one-stage anterior release and reduction with posterior fusion for irreducible atlantoaxial dislocation. METHODS:Ten male and 6 female patients, with an average age of 36 years, including 13 patients with old trauma, 2 with rheumatoid disease, and 1 with os odontoid...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Hao DJ,He BR,Wu QN

    更新日期:2009-11-01 00:00:00

  • Comparison of Arthrodesis and Non-fusion to Treat Lisfranc Injuries.

    abstract:OBJECTIVE:"Lisfranc joint injury" is comprised of a tarsometatarsal joint-complex injury. The Lisfranc complex injury is always a challenge for orthopedists, and the optimum treatment is still up for debate. Anatomic reduction and stable internal fixation prove to have no satisfactory outcomes. This research aims to co...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Qiao YS,Li JK,Shen H,Bao HY,Jiang M,Liu Y,Kapadia W,Zhang HT,Yang HL

    更新日期:2017-02-01 00:00:00

  • Effects of Unilateral Tourniquet Used in Patients Undergoing Simultaneous Bilateral Total Knee Arthroplasty.

    abstract:OBJECTIVE:To assess the benefits of use of a tourniquet in one limb in patients undergoing simultaneous bilateral total knee arthroplasty (TKA). METHODS:A prospective randomized trial was designed to evaluate the outcomes of unilateral tourniquet use during simultaneous bilateral TKA. A total of 52 (36 women and 16 me...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章,随机对照试验


    authors: Liu PL,Li DQ,Zhang YK,Lu QS,Ma L,Bao XZ,Zhang M

    更新日期:2017-05-01 00:00:00

  • A New Intraoperative Syndesmosis Instability Classification System: Utility and Medium-term Results in Closed Displaced Ankle Fractures.

    abstract:OBJECTIVE:To investigate the utility and medium-term results of a new intra-operative classification system for distal tibiofibular syndesmosis injury in ankle fractures. METHODS:Between January 2010 and January 2015, 116 patients diagnosed with displaced closed Weber B and C ankle fractures were treated in our depart...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Qiu HB,Jiang J,Porter D

    更新日期:2017-11-01 00:00:00

  • Efficiency of Zoledronic Acid in Inhibiting Accelerated Periprosthetic Bone Loss After Cementless Total Hip Arthroplasty in Osteoporotic Patients: A Prospective, Cohort Study.

    abstract:OBJECTIVE:To investigate the influence of preoperative osteopenia/osteoporosis on periprosthetic bone loss after total hip arthroplasty (THA) and the efficiency of zoledronate (ZOL) treatment in periprosthetic bone preservation. METHODS:This multicenter, prospective cohort study was conducted in four centers between A...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章,多中心研究


    authors: Fu GT,Lin LJ,Sheng PY,Li CC,Zhang JX,Shen J,Liu S,Xue YL,Lin SP,Wang K,Zheng QJ,Ding Y

    更新日期:2019-08-01 00:00:00

  • Multiple Fractures of Cervical Vertebrae Combined with Arcuate Foramen and Vertebral Artery Occlusion: A Case Report and Literature Review.

    abstract:BACKGROUND:The arcuate foramen is a complete or partial bony bridge over the vertebral artery groove of atlas. The mechanism of the arcuate foramen is not clearly understood. Omission of the arcuate foramen sometimes causes lethal iatrogenic injury during spinal surgery. CASE PRESENTATION:We describe a patient who was...

    journal_title:Orthopaedic surgery



    authors: Wang WH,Liu ZY,Guo HC,Wang H

    更新日期:2020-12-03 00:00:00

  • Surgical treatment of thoracolumbar fracture through an approach via the paravertebral muscle.

    abstract:OBJECTIVE:To investigate the methods for, and clinical outcome of, the operative treatment of thoracolumbar fractures through an approach via the paravertebral muscle (PVM). METHODS:From June 2005 to August 2006, 62 patients, comprising 48 men and 14 women with an average age of 45.2 years (range, 21-58) with thoracol...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章,随机对照试验


    authors: Pang W,Zhang GL,Tian W,Sun D,Li N,Yuan Q,Zhang B,Wang YQ,Liu W

    更新日期:2009-08-01 00:00:00

  • The invention of an iliosacral screw fixation guide and its preliminary clinical application.

    abstract:OBJECTIVE:To introduce an iliosacral screw fixation guide and evaluate its efficacy in fixation of sacroiliac joint fracture-dislocations. METHODS:Between January 2011 and May 2011, eight patients (five men, three women) with sacroiliac joint fracture-dislocation underwent percutaneous iliosacral screw fixation with t...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Pan WB,Liang JB,Wang B,Chen GF,Hong HX,Li QY,Chen HX

    更新日期:2012-02-01 00:00:00

  • Comparison of Superior-Level Facet Joint Violations Between Robot-Assisted Percutaneous Pedicle Screw Placement and Conventional Open Fluoroscopic-Guided Pedicle Screw Placement.

    abstract:OBJECTIVE:To compare the superior-level facet joint violations (FJV) between robot-assisted (RA) percutaneous pedicle screw placement and conventional open fluoroscopic-guided (FG) pedicle screw placement in a prospective cohort study. METHODS:This was a prospective cohort study without randomization. One-hundred pati...

    journal_title:Orthopaedic surgery

    pub_type: 杂志文章


    authors: Zhang Q,Xu YF,Tian W,Le XF,Liu B,Liu YJ,He D,Sun YQ,Yuan Q,Lang Z,Han XG

    更新日期:2019-10-01 00:00:00