Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 24091
HIP HEMIATHROPLASTY IN FEMORAL NECK FRACTURES
UNIPOLAR VERSUS BIPOLAR - A RETROSPECTIVE STUDY
Narayana Prasad KARAKKAD, Kishan PARALAYA
Dhanalakshmi Hospital, Kannur (INDIA)
Several variables interplay in the decision between a unipolar and bipolar prosthesis
for use in hemiarthroplasty. Theoretical decrease in articular cartilage wear and
increased range of motion between the bipolar devices are frequently cited as
benefits obtained by choosing a bipolar design. Most frequently, cost containment is
cited as primary indication for use of unipolar device.We had reviewed 309 cases of
fracture neck femur treated with hemiarthroplasty in last four years. Patient age
group varies from 60 years to 102 years. Average follow up was 3 years. Of the total
309 cases 247 patients were operated by unipolar (Austin Moore and Thompsons)
And 62 with bipolar (regular and modular). 299 cases were operated in posterior
approach of Southern Moore while 10 cases in anterolateral (Modified Harding’s). All
these cases were analysed on the basis of post operative pain, gait pattern and the
time taken for the return to normal activity. Radiological assessment with regard to
protrusio is also taken into consideration. More than 70% of the people in the
unipolar group regain pre fracture level of ambulation, 80% reported mild pain or no
pain one year following surgery. Up to 80% survivorship in 3 years. There have been
indications that stiffness, groin pain, cartilage degeneration, and acetabular protrusio
are more frequent with unipolar designs when compared to bipolar designs. As noted
an increase in stability may be conferred by the bipolar design.
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