North West Hip & Knee Clinic - Total Hip Replacement

Mr Aslam Mohammed FRCS, FRCS (Orth)
Consultant Hip & Knee Surgeon

Specialising in:
Lower Limb Arthroplasty & Sports Injury

uk hip resurfacing surgeon

wHip procedures
sTotal Hip Replacement

Total hip replacement surgery replaces the worn out hip joint with a prosthetic implant (artificial joint). Total hip replacement, although dating back to the 1940’s, was advanced in the UK in the 1950’s and 60’s by Sir John Charnley after many initial failures of bearing surfaces, design of implants and fixation techniques which all failed. Sir John Charnley designed the successful Low Frictional Torque Arthroplasty (LFA). Today, over 55,000 total hip replacements are performed in the UK each year; it is one of the most dramatic life changing surgical procedures performed in medicine today.
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Sir John Charnley
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Early ad
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There are numerous types of hip replacement available each with a different design, fixation, bearing surface and size of femoral head. The most widely used consist of a metal ball articulating with a plastic socket (UHDP ultra high density polyethylene). Some hip replacements are designed to be used with acrylic cement, which acts as a grout to secure the implants in the bone bed (cemented); others are designed with special coatings and surfaces to encourage bone growth onto the prosthesis to give biological in growth and long term stability (uncemented).

In the metal on plastic bearing surface, it is the plastic liner that wears out with time and is related to the load, activity levels and type of activity being undertaken.  Advances in technology and better understanding of joint mechanics has led to the development newer bearing surfaces which can tolerate  higher levels of activity and will therefore wear out more slowly. These bearing surfaces are either metal-on-metal (As in the resurfacing arthroplasty). or ceramic-on-ceramic (Mostly uncemented implants). Patients who are young and physically active may be candidates for these new bearing surfaces. As wear rates and ultimate failure of the joint replacement may well be significantly reduced.


MRI Scans

North West Hip & Knee Clinic - Hip Resurfacing
Copyright Mr Aslam Mohammed 2009