26/11/2004
AO Technical Commission Approved

LCP Proximal Femur 4.5

The LCP Proximal Femur 4.5 is part of the Locking Periarticular Plating System, which merges locking head screw (LHS) technology with conventional plating techniques. It is indicated for pertrochanteric fractures, subtrochanteric fractures, instable intertrochanteric fractures, and intertrochanteric fractures with reverse obliques, as well as malunions and nonunions of these fracture types. The LCP Proximal Femur 4.5 is a stainless steel plate with a limited contact profile. The proximal portion of the plate is anatomically contoured to approximate the lateral profile of the proximal femur. Therefore, it comes in a right and left version. The two proximal screw holes accept 7.3 mm cannulated locking and 7.3 mm cannulated conical screws. The third locking hole accepts a 5.0 mm cannulated LHS and is angled to converge at the tip of the proximal 7.3 mm screw and is intended to resist varus deformity forces. The remaining screw holes are locking compression plate (LCP) holes which combine a dynamic compression unit (DCU) hole with a locking hole. This provides the surgeon with the flexibility to gain axial compression and angular stability throughout the length of the plate. Because of the proximal screw configuration, the plate can be compressed with the articulated tension device to create a load sharing construct. This is important and should be the aim whenever possible. This plate can be secured to osteopenic bone, or to bone where there is a cortical defect. The LCP Proximal Femur 4.5 uses existing screws and instrumentation. The stainless steel screws necessary for implantation are: 7.3 mm cannulated conical, 7.3 mm cannulated locking head, 5.0 mm cannulated conical, 5.0 mm cannulated locking head, 5.0 mm and 4.0 mm StarDrive locking head screws, and 4.5 mm cortex screws.

78-year-old osteoporotic female with a left subtrochanteric femur fracture. The proximal femur has a frontal plane fracture in it. Advantages include excellent purchase of the osteoporotic proximal segement, avoidance of abductor devitaliation, and reestablishment of the normal neck-shaft angle.

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