Comparison of Functional Outcome of Austin Moore Hemiarthroplasty VS Bipolar Hemiarthroplasty in Transcervical Femoral Neck Fractures in Elderly Population

Abstract

Introduction: The most popular treatment for misplaced femoral neck fracture in the elderly is hemiarthroplasty.
Unipolar and bipolar implants are the two types used in hemiarthroplasty. Different prostheses, such as Austin Moore, Thompson, and Bipolar prostheses, are employed based on the patient's mobility, neck, and bone stock in the medial buttress. Theoretically, bipolar prostheses prevent acetabular erosion by shifting weight to the inner bearing of the prosthesis, which in turn lessens the interaction between the prosthesis and acetabulum.
Methodology: This cohort study was conducted by the orthopedic surgery department of Allied Hospital Faisalabad
between January and June of 2025. Patients of both sexes with femur neck fractures of Garden Type III and Garden
Type IV who were between the ages of 50 and 70 were included. Patients with pathological fractures, those medically
ineligible for surgery, those with bilateral femur neck fractures, those who had undergone surgery on both the same
and opposite sides, and nonambulators were excluded. Patients were divided into two groups, Austin Moore
hemiarthroplasty was done on patients in group A, while bipolar hemiarthroplasty was performed on patients in
group B. The Haris Hip Score was used to determine the functional outcome both before and after surgery. It was
determined weekly for the first four weeks, then every two weeks for three months, and finally every month for six
months. An HHS of 90 or higher was considered exceptional, 80 to 89 good, 70 to 79 fair, and less than 70 bad.
Results: The Harris hip scores for groups A and B in my study were 62.34 ± 7.32 and 63.42 ± 6.98 at baseline,
respectively, and 89.43 ± 6.13 and 82.15 ± 7.45 at six months. 51.66% of patients in this study had outstanding
treatment outcomes from Austin Moore Hemiarthroplasty, 32.23% had good outcomes, 10.43% had acceptable
outcomes, and 5.69% had bad outcomes. 33.65% of patients who underwent bipolar hemiarthroplasty experienced
outstanding results, 37.91% had good outcomes, 19.43% had fair outcomes, and 9.00% had bad outcomes.
Conclusion: This study found that treating transcervical femoral neck fractures in elderly population with
Austin Moore Hemiarthroplasty results in a better functional outcome than with Bipolar hemiarthroplasty.
Keywords: Austin Moore Hemiarthroplasty; Bipolar Hemiarthroplasty; Femoral Neck Fractures; Harris Hip
Score; Outcome,