This study study was conducted on 20 patients undergoing total hip
replacements due to various hip pathologies in adults aged from 20 to
55 years . All patients who had undergone noncemented THR using
36-mm ceramic femoral heads and highly cross-linked polyethylene
liners were identified . Indications for use of a ceramic femoral head
were young (aged 55 years or younger) and/or active patients. The
study excluded any patient with any dislocations, acetabular fractures,
infections, or any revision or reoperation as indications for hip joint
replacement.
All the patients of the study were subjected to the following after an
informed consent
1) Full history taking.
2) Clinical assessment , To correlate radiographic readings with patient
satisfaction and clinical symptoms, the patients answered a
questionnaire, concerning pain and patient satisfaction according to
Harris hip score.
3) Radiographic assessment.
Duration of the study was 18 months, Preoperative clinical assessment
and harris hip score and radiological evaluation and the same protocol
for each visit post operatively
The results showed that The Harris Hip Score increased from a
preoperative mean of 38.2 points to 94.2 points.And range of motion
improved from mean 122.35 to 204.15° after 18 months follow-up.
These values are higher than those of two other comparable running
studies with 28 mm femoral head.
Increasing the femoral head size increase the stability and range of
motion of the hip joint in THA but with convensional bearing surfaces
this cause increased wear rate and decrease the longivity of the
prothesis. With new articulatig bearing surfaces as ceramic on highly
cross linked poly ethylene we can get the benefit of increasing the head
size and increase the longivity of the joint prothesis specially in young
adults.
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