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Conventional
total hip replacement has failed the young active adult.The
Birmingham Hip Resurfacing addresses this difficult patient
group.
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We have
shown that the femoral head remains viable after hip resurfacing.
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Femoral
neck fracture is a rare occurrence and in our experience
has only occurred in the presence of poor bone quality.
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Femoral
head fixation with cement has been shown by us and others
to be extremely durable.
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We have
seen early and extensive ingrowth into the hydroxyapatite
coated PorocastTm socket.
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It
has been shown that thick film lubrication is possible in
these large headed metal on metal hip resurfacing arthroplasty
bearings.
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We
have observed no wear on retrieved Birmingham Hip Resurfacing
bearings.
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We
have measured low blood metal ion levels in a highly active
group of patients fitted with the Birmingham Hip Resurfacing.
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We
have measured low frictional torque in these Birmingham
Hip Resurfacing bearings on a realistic loading pendulum
apparatus.
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In
1,839 metal metal hip resurfacings we have seen no occurrence
of dislocations over the past eight years nine months.
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We
have treated a young active patient group with arthritic
hips when they needed their treatment most, allowing them
to return to work.
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Patients
have achieved excellent functional results after this procedure
with many participating in recreational sport allowing the
health gain associated with activity.
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In
this young and active population we have seen in our 1,720
hybrid hip resurfacings in the Birmingham series an overall
99% success rate and in our longest followups we have a
98% survivorship at five years.