3.5 mm LCP Periarticular Proximal Humerus
Dean Lorich, Norbert Südkamp
The 3.5 mm LCP periarticular proximal humerus plate is indicated for fractures, fracture dislocations and nonunion of the proximal humerus particularly for patients with osteopenic bone. This construct acts as a fixed angle device with divergent and convergent screws offering superior biomechanical properties to improve fixation and pullout strength in osteoporotic bone.
The plate is positioned more distal (12-15 mm from insertion of the rotator cuff) to avoid impingement and more anterior at the distal end to reduce the need to elevate the deltoid insertion. The plate is produced in precontoured models. Six suture holes with undercuts allow for passing sutures to help with both reduction and ligament reattachment. Chamfers at the top and bottom edges of the suture holes prevent sharp edges. The plate head features six locking holes that accept 3.5 mm locking screws and two locking kickstand screws in the plate neck to direct the screws into the calcar region. The plate shaft has elongated combination holes and accepts 3.5 mm locking and 3.5 mm cortex screws. The second calcar screw can be used for shaft reduction with a nonlocking cortex screw. The cutout in the plate for the cortex screw head is deeper and more rounded for reducing screw head prominence. The tapered plate tip facilitates percutaneous insertion. The plate is available in 2 - 14 holes (2 hole increments) in stainless steel.
A 72-year-old woman suffered a four-part fracture of the left proximal humerus following a fall from a standing height. The patient underwent open reduction and internal fixation of the proximal humeral fracture.
Case provided by Dean G Lorich, New York, New York, USA
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