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A Specialized Cervical Corpectomy Plate Fault Tree Analysis 23 April 2008

A Specialized Cervical Corpectomy Plate Fault Tree Analysis 23 April 2008. Patient Hazards. Design/Labeling Failure. Physical Failure. A. B. A. Screw Problems. Plate Problems. Screw Translation. Screw Motion. Screw Failure. Screw Hole Sizing. Plate Failure. Plate Deformity. C.

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A Specialized Cervical Corpectomy Plate Fault Tree Analysis 23 April 2008

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  1. A Specialized Cervical Corpectomy Plate Fault Tree Analysis 23 April 2008

  2. Patient Hazards Design/Labeling Failure Physical Failure A B

  3. A Screw Problems Plate Problems Screw Translation Screw Motion Screw Failure Screw Hole Sizing Plate Failure Plate Deformity C D E F G H

  4. B Design Labeling Poor Implantation Incompatible with tools Break in Packaging Incorrect Sizing Poor Implantation Placement of plate in Ionic Circuit Allowance of poor screw-plate size combination Ambiguous storage Ambiguous labeling Ambiguous screw-plate size combination Inadequate labeling Tear in Plastic Melting of Adhesive

  5. C Displacement of screw in torsion Subsidence displacing screw

  6. D Failure of Screw-to- Bone Union Insufficient rotational screw movement allowance Excessive screw rotation permitted Failure of static screw to lock to plate

  7. E Shearing of screw neck in subsidence Shearing of screw neck in torsion

  8. F Too small of a diameter Too large of a diameter Plate surface interferes with static screw locking Plate surface interferes with static screw locking

  9. G Buckling in torsion Buckling in axial loading

  10. H Sub-failure stress deformation of plate

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