Inspired by the clinically proven design philosophy of a dual tapered stem geometry, the APEX K1™ stem is engineered to provide immediate primary fixation and torsional stability. The K1 is unique in combining the aggressive profile of a rectangular distal cross section with a circumferentially coated proximal body to help prevent migration of potentially lytic particles. The APEX K1 stem represents a proven clinical design with an enhanced metaphyseal geometry and surface properties.
The geometry of the K1 stem body is identical to its sister product, the K2 Modular Stem. As a result, the surgeon can switch from the K1 to K2 Modular intraoperatively, without further bone preparation, should patient anatomy dictate a need for independent selection of lateral offset, vertical height or version.
A/P Neck Relief Prevents Impingment and Maximizes Range of Motion
The enhanced metaphyseal dimensions of the stem are designed to provide additional resistance to torsional loads. The trapezoidal cross- sectional profile inherently establishes solid purchase in cortical bone to facilitate primary fixation. Combined with the broach-only surgical technique, the stem’s geometry is also intended to preserve intramedullary vascularization.
Provides cortical stability and resistance to torsional loads
Pneumatic broaching, using the IMT Medical Woodpecker™ is also an available option, for quick, accurate and effective broaching.
A CP-Titanium plasma spray surface treatment is applied to the proximal third of the stem with a specific porosity to encourage bony ingrowth, providing a circumferential seal against distal particulate migration. Distally, Corundum blasting creates a roughened macrostructure to encourage bony ongrowth.
Heads Come in 36mm, 32mm, and 28mm Diameter Heads in either CoCr or Alumina Ceramic
Two offset necks are offered for each size, Standard and Lateralized. Standard necks have a 135 degree angle; Lateralized, 130 degrees. For sizes 7 and greater, there is also a LAT + offset, with a 127 degree angle.