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Principles of lock plates
- 1. LOCKING COMPRESSION PLATES (LCP) - PRINCIPLES AhmadFadzli Sulong - IIUM
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- 7. Preserves biology No compressionof plate unto bone - biological
- 8. Fixed angle construct Formsa fixed angle construct
- 9. Fixed angle construct •Increase screw pullout strength • Prevent sequential failure • Resists bending and torsional forces
- 10. Acts as internalsplint • Acts as a load sparing device • Allows micromovement at the fracture site - healing through secondary fracture healing
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- 14. Periprosthetic fractures • Oftenin osteoporotic bone • Locked screw can purchase limited bone around
- 15. Peri articular fractures Especially in short metaphyseal segments Provides good control of the segment
- 16. Peri articular fractures •Plates are often precontoured • Once fixed unto the articular segment, it helps reduction unto the metaphysis due to its precontoured nature
- 17. Peri articular fractures •Locking constructs are angularly stable • Resists collapse and Prevents toggle
- 18. Biological fixation • Usingthe plate as an internal ext-fix / splint • Bridging the fracture • Preserving fracture haematoma • Percutaneous insertion (MIO technique) • Achieves relative stability
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- 20. Too many screws! Whathappens?
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- 22. Too ‘advanced’? Which platewould you use?
- 24. Conclusion Excellent toolfor fracture management if indicated Does not substitute proper pre-op planning Plan which LCP to use Especially plan how to achieve reduction – direct vs indirect MIO technique? Avoid abuses COST! – main consideration nowadays
Editor's Notes
- #21 Longer working length is better Small working length – increases stress and strain – implant failure
- #22 Cold welding – observe the interface between screw and plate Especially when power drill – what is best technique?
- #23 Lcp not indicated in normal bone – minimal difference in pullout strength if normal bone Can do simple bridge plate…