Results of fixation of femoral neck fractures 35% RE-INTERVENTION RATE IN DISPLACED # Non-union Avascular necrosis Loss of fixation
Fracture healing of femoral neck fractures GOALS: Preserve the remaining blood supply Provide the stability necessary for revascularisation Provide the stability necessary for primary osteonal reconstruction MEANS: Anatomical reduction Stable internal fixation
Why do implants fail? multiple parallel screws or pins: PRO’S: Dynamic Minimal invasive CON’S: No angular stability No rotational stability Stability relies on the three- point fixation method and is dependant on exact screw placement High total implant volume
Why do implants fail? sliding hip screw devices: PRO’S: Angular stability Dynamic CON’S: No rotational stability –During insertion –After insertion –With or without ‘anti-rotation’ screw High implant volume LABILE UNSTABLE
Can we make a better implant?
GANNET Gannet nail & side wings Impaction anchors Gannet plate