In 1988 Sulzer Orthopedic (Winterthur,
Switzerland) developed a metal-metal friction for different
models of hip arthroplasty, to improve the results of polyethylene
friction models. We were very interested in analyze the
advantages of metal-metal we have done a restrospective
study of 52 total hip arthroplasties treated from 1993 and 1995.
The implants have been a noncemented stem Zweymüller SL
Alloclasic and a noncemented threaded Zweymüller CSF cup
with metal-metal friction. Fourty seven cases were coxarthritis
and five cases were femoral avascular necrosis. We have
studied the patients with a medium follow-up of 6 years.
Applying the scale of of Merle D´Aubigné modified by
Charnley, the 96% of the patients had excellent and good
results. The results were bad in two patients, one had a deep
infection and the other had periarticular ossifications Brooker
type 4. The global results with the metal-metal friction with a
minimum six years of follow-up have been positive.

In 1988 Sulzer Orthopedic (Winterthur,
Switzerland) developed a metal-metal friction for different
models of hip arthroplasty, to improve the results of polyethylene
friction models. We were very interested in analyze the
advantages of metal-metal we have done a restrospective
study of 52 total hip arthroplasties treated from 1993 and 1995.
The implants have been a noncemented stem Zweymüller SL
Alloclasic and a noncemented threaded Zweymüller CSF cup
with metal-metal friction. Fourty seven cases were coxarthritis
and five cases were femoral avascular necrosis. We have
studied the patients with a medium follow-up of 6 years.
Applying the scale of of Merle D´Aubigné modified by
Charnley, the 96% of the patients had excellent and good
results. The results were bad in two patients, one had a deep
infection and the other had periarticular ossifications Brooker
type 4. The global results with the metal-metal friction with a
minimum six years of follow-up have been positive.