LCP Dynamical Helical Hip System (LCP DHHS)
Postoperative x-ray, AP view. The LCP Dynamic Helical Hip System is a stainless steel plate and helical blade construct used to treat stable and unstable intertrochanteric and pertrochanteric fractures. The system can also be used to treat certain basilar neck and subtrochanteric fractures. A significant feature of the plate portion of the system is the incorporation of a barrel that contains a mechanism which allows the surgeon to lock rotation of the helical blade intraaoperatively. This separate key allows for the free rotation of the helical blade shaft within the barrel, giving surgeons the opportunity to position and fine tune the placement of the plate along the shaft of the proximal femur. When the desired plate position is achieved, the key can then be activated, lock rotation, and still allow for dynamic compression of the fracture. As the LCP DHHS system utilizes a helical blade, it is also a significant improvement over traditional hip screws. In mechanical testing, the helical blade has proven to resist rotational and cantilever loads far greater in fatigue and static testing than traditional hip screws. The helical blade requires less bone removal in the femoral head, therefore preserves as much bone around the construct as possible. The combination of the helical blade and the new LCP side plate create a very stable secure construct which improves upon the original concept of the sliding dynamic hip screw implant. The plates feature locking compression holes which allow for the use of 5.0 mm locking head screws or 4.5 mm cortex screws. The plate design incorporates a limited contact profile and a tapered end for easier insertion through smaller incisions. The LCP DHHS is available in a 130 version with 4.5 and 6 holes, as well as a 135, 140, and 145 with 26 holes each.
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