Charnley and similar devices), where the acetabular bearing surface
in total hip replacements: State of the art and future developments.
Tests have shown that some bearing surfaces
with cross-hatch finish specifications help engines maintain maximum hydrodynamic oil film on journals, but oil seal surfaces generally do not require cross-hatch finishing.
For many patients, hip replacements - no matter what type of bearing surface
is used - dramatically improve overall quality of life.
The company uses a high-speed superabrasive process to grind the bearing surfaces
on ductile cast-iron single-throw crankshafts for 12- and 15-hp lawn tractor engines.
Its unique construction features a polished bearing surface
on one side and a porous bio-in-growth surface on the reverse side for solid endplate attachment.
On the underside of each bearing surface
, a mechanical preload is applied to ensure frictionless movement of all axes.
Wright's DYNASTY[TM] Acetabular Cup System combines the benefits of larger diameter femoral heads with the stability of screw fixation and versatility of both metal and cross-linked polyethylene bearing surface
One of the most often used bearing surface
combinations is metal on polyethylene, a form of plastic that provides marked durability.
In addition to this advanced bearing surface
technology, Doncasters Medical Technologies has also developed an integral cast textured porous surface.
Smith & Nephew is the only company in the world to commercialize an advanced bearing surface
for the femoral component of a knee replacement.
This cutting edge surface technology is expected to significantly increase the service life of spinal implants by controlling the inevitable bearing surface
wear that occurs in any articulating system.