Dissertation > Excellent graduate degree dissertation topics show

Multi-pin Internal Fixation of Calcaneal Fractures in Finite Element Analysis

Author: SunRongZuo
Tutor: BaiJingPing
School: Xinjiang Medical University
Course: Surgery
Keywords: Calcaneus fracture Internal fixation Finite element analysis
CLC: R687.3
Type: Master's thesis
Year: 2011
Downloads: 10
Quote: 0
Read: Download Dissertation

Abstract


Objective:Aimed at the analysis of calcaneal fractures of multi-pin fixation and plate fixation of the two methods of fixed effects, evaluation of two kinds of internal fixation methods in clinical efficacy, for the treatment of calcaneal fracture select the internal fixation methods provide the biomechanical evidence, for the clinical treatment of calcaneal fractures provide guiding significance.Method: Retrospective study of 59 cases of intra-articular calcaneal fractures, Sanders points:Ⅱtype 59 cases, 36 cases of the foot with open reduction and Multi-pin fixation, 23 cases of the foot open reduction and plate fixation, evaluation of two kinds of plate and multi-pin internal fixation of clinical efficacy.CT scan of a weight 64kg normal male right calcaneus, establishment of a complete three-dimensional finite element model calcaneus, simulation of SandersⅡtype fracture of calcaneus, simulation of calcaneal fracture plate and multi-pin of two kinds of internal fixation by Achilles tendon loading condition, comparative study of model of stress distribution and the relative displacement of the fracture line. Results(:1)The clinical results: SandersⅡfracture Multi-pin fixation group good rate of more than 83%. Plate group good rate of 78%, The two groups after the efficacy of no statistical difference (P>0.05). Postoperative soft tissue complications of Multi-pin fixation group the occurrence rate of 16.7%, Plate fixation group the occurrence rate of 34.8%, The difference was statistically significant (P<0.05). (2)The finite element results: The biggest Achilles tendon loading load 160 Newtons of three groups of fracture fixation model group, The functional position of 0°within the group of plate fixed maximum principal stress values: 85.452MPa, Multi-pin functional position 0°within the group of fixed maximum principal stress values: 87.378MPa, Multi-pin 30°plantar flexion group fixed the maximum principal stress value: 120.58MPa. three groups of the model fixed the maximum principal stress values are less than the yield strength of fixation of 225MPa. Three models of the relative displacement calcaneal fracture line is less than the intra-articular calcaneal fractures are indications for surgical separation of the fracture line or displacement of≥1mm requirements. Continuous loading 1 to 1000 Newtons load condition, When internal fixation failure in internal fixation of three groups of corresponding maximum principal stress values of the Achilles tendon loading respectively: Plate function position 0°group: 487.38 N; multi-pin functional position 0°group:465.45 N; multi-pin 30°plantar flexion group: 340.28 N. Three groups of models of internal fixation failure in the Achilles tendon loads were greater than 160 N. From inside the fixed stress distribution analysis, multi-pin and plate fixation are evenly distributed the stress.Conclusion: For SandersⅡtype of intra-articular calcaneal fractures, plate internal fixation with multiple pin fixation can obtain similar clinical efficacy and the result of finite element analysis. Compared with plate fixation, multi-pin fixation is more suitable for SandersⅡfracture, and can effectively reduce the risk of postoperative soft tissue complications.

Related Dissertations

  1. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  2. EDM Electrode Wear Mechanism and Control Research,TG661
  3. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  4. Study on the Design and Biomechanical Behaviors of Individualized Artificial Knee Joint,R318.1
  5. Design of Testing Equipment for Electronic Products,TN06
  6. The Relation of the Height of the Remnants of Thoracolumbar Tuberculosis and Selection of Mode of Anterior Internal Fixation,R687.3
  7. Comparison of PFNA and DHS in Treatment of the Elderly Intertrochanteric Femur Fractures,R687.3
  8. Open Reduction and Internal Fixation of Displaced Scaphoid Fractures,R687.3
  9. Open Reduction and Internal Fixation with the AO Anatomic Plating Systems for Type C Fractures of the Adult Distal Humerus,R687.3
  10. The Outcome between Interlocking Minimally Invasive Percutaneous Plating and Interlocking Intramedullary Nailing in Treating with Fractures of the Lower Tibia,R687.3
  11. Airborne radar antenna pedestal rapid design systems research and development,TN959.73
  12. Sham hose drum drive means and hydraulic system of the structure,TE973
  13. The magnetorheological damper mechanical properties and Gun Recoil,TB535.1
  14. Nonlinear Structural Dynamics Analysis and Optimization Design on Naval Gun Driver,TJ391
  15. Design and Analysis of Automatic Steel Pipes Butt Tool,U673.38
  16. Analysis on Unloading of Large Span Steel Structures and Research on Its Mechanical Analysis,TU391
  17. Simulation of the Clinching Process Using FEA Method with Steel and Aluminum Alloy Sheets for Automotive Sunroof Frame,U463.83
  18. M1 of CRH2-300 Train Finite Element Analysis and Travelling Comfort,U266
  19. The Design of Telescopic Asphalt Spraying System,U415.524
  20. Development of Post-process System in Sheet Metal Simulation Based on SolidWorks,TP391.72

CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
© 2012 www.DissertationTopic.Net  Mobile