Total hip replacement is most commonly surgical procedure used to treat joint abnormality due to osteoarthritis and other disorders affecting function of the hip joint.

The best mode of implant fixation in primary total hip replacement (THR) has been a source of debate. Cemented implants achieve stability from cement-bone mechanical interlock, once the polymethylmethacrylate has set, whereas cementless fixation relies on primary press fit stability with long term stability occurring secondary to endosteal microfractures at the time of preparation and subsequent bone on growth or in growth. The optimum fixation choice should be guided by patient-based outcomes, in particular the implant survivorship.

The adverse effects of bone cement led to the popularity of uncemented total hip arthroplasty. Here porous and hydroxy apatite coated components are used. This creates a biological interface called bone ingrowth (osteo integration). Instead of fatiguing and failing of bone cement, this type of fixation continually grows stronger, remodelled and becomes more permanent. The three criteria for bone ingrowth are pores > 40mm in diameter, absence of micromotion, intimacy of porous surface with bone. This study here is to analyze the functional outcome of uncemented THR.

Aim of Study: To study the functional outcome of uncemented total hip arthroplasty.

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Dr Sudhir Ravindran

Associate Professor, Department of Orthopedics, Medical College Trivandrum