Linear Total Hip System
Minimized Distal
Stem
The gradual change in stiffness of the wedge
design is less likely to cause thigh pain. In
a study of 297 primary hips of
a competitive design, 12% of
the patients reported thigh
pain at one year follow-up. A
direct correlation was found
between stem size and thigh
pain. In general, thigh pain
increased with stem size due
to increasing bending stiffness.
This creates abnormally
high femoral stresses at the
distal tip of the component1.
The Linear® hip stem has a
more tapered distal stem to
decrease this stiffness and
reduce the incidence of thigh pain.
Standard and
Lateralized
Offset Options
The Linear hip stem is
offered in two offsets,
standard and lateralized.
If the hip is unstable
with a standard offset,
the lateralized version
improves soft tissue
tension to increase
stability. The improved
abductor mechanics
may also decrease limp.
Proven Design
The Linear hip stem is a titanium flat
wedge stem designed for metaphyseal
fit. The wedge shape allows the stem to
subside to stability and the flat edge
provides enhanced rotational stability.
Reported results of 145 hips of similar
stem design at a mean of ten year followup
showed only 1% rate of revision for
aseptic loosening2.
Linear Total Hip Series
- Ti alloy material
- 11 standard femoral stem sizes
- 1 special size
- Tapered geometry
- 135 degree neck angle
Fig. 1. Tapered distal stem of the Linear hip stem. 
Fig. 2. Standard and laterlized offset options. 
Fig. 3. Post-op x-ray.