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Our study is a retrospective one analyzing the functional and radiological outcome of un-cemented Hydroxyapatite coated stem in Total Hip Arthroplasty. The total number of hips in our study was 40 all of them done by a single surgeon. With a mean follow up of 8.075 years. The average age of all the patients was 56.35 years. The prosthesis used was a standard collarless corail stem (Depuy) with Duraloc shell. The clinical evaluation was done using Harris hip score. Standard xrays were taken to analyze the radiological outcome. 85% of our patients had an excellent result on the Harris hip score and 12.5% of our patients had a good result. The mean modified Harris hip score was 96.2% during the midterm follow up. 5% of our patients had limb lengthening between 1-1.5cm with good modified Harris hip score. Radiological evaluation was done 5% of our patients had a Varus stem position, 85% of them had a central stem position. None of the patients had any femoral loosening. Vertical subsidence of negligible 3-5mm was seen in 7.5% of our patients with no change in clinical outcome. None of our patients had heterotrophic ossification. 5% of our patients had periosteal bone remodeling reactions. Our study concludes that Un-cemented primary Hydroxyapatite coated Total Hip Arthroplasty is a reliable procedure with excellent implant fixation and a predictable clinical outcome. Modified Harris hip score is a useful scoring system in assessing Total Hip Arthroplasty.

Midterm Follow up Analysis of the Functional And Radiological Outcome of Un-Cemented Hydroxyapatite Coated Stem in Total Hip Arthroplasty