Product Overview
Zweymüller stem philosophy
-A fourth generation of the Zweymueller design, the
Profemur® Z revision stem is designed with additional
length compared to its primary option (+40mm) in
order to promote distal fixation in revision cases. The
stem possesses a rectangular cross section and
prominent lateral shoulder designed to facilitate
rotational stability. The softer edges on the medial
calcar area are designed to minimize stresses and risk
of bone fracture during stem insertion.
Design features
Zweymüller philosophy:
- The "fit without fill" technique preserves endosteal
blood supply, improves initial stability, and fits a
variety of bone shapes2
Rotational stability:
- Rectangular cross-section and the wedge shaped
geometry allow for four-point fixation and contact
along the four corners within the femoral canal1
Intramedullary fixation:
- Dual taper geometry provide optimal load transfer
and primary fixation with a grit-blast titanium surface
for increased bone apposition
Rounded proximal-medial edge:
- Rounded edges to minimze stress on the medial
calcar during implantation
Trochanteric wing:
- Extended lateral shoulder contributes to proximal fill
in addition to rotational stability
Rounded distal tip:
- Reduces the risk of fracture during implantation and
minimizes intramedullary point contact in the distal
femur
Product options:
- Sizes 1–9
- Straight (135°) and (127°) neck angles
- Short and long neck lengths
- Grit blast or plasma spray coating
- Classic and modular
https://www.microportortho.com/products/hips/femoral-stems/revision/profemur-z-revision-hip-stem
