Hip osteoarthritis is prevalent in the middle aged Baby boomer population in the USA and Canada afflicted by Osteoarthrits.
In India however the majority of patients afflicted by hip arthritis are young. Ankylosing spondylitis, avascular necrosis, post traumatic arthritis, rheumatoid arthritis are conditions affecting young patients in their thirities. Hip resurfacing is the ideal operation for these young patients as they preserve bone, last longer and cause less pain.
What are the types of Hip replacement?
The traditional total hip replacement has been around for nearly 40 years and provides great benefits to the elderly afflicted by osteoarthritis of the hip. In this a metal stem is implanted in the upper end of the thigh bone and a socket made of polyethylene is cemented into the acetabulum. Wear particles are liberated and these lead to aseptic loosening in fifteen years.
Bone loss occurs and a revision surgery may be needed after the time of the prosthesis runs out
A Surface hip replacement resurfaces only the top of the hemispherical head of the femur. It is a bone conserving surgery. It has been in the market for nearly 5 years
A latest type of hip prostheis has been introduced in India called the Proxima hip. It consists of a large diameter metal head and cup. It resembles a total hip with the distal or long stem like portion cut away and the prosthesis is implanted only in the proximal part of the femur or thigh bone( Hence the name Proxima). It has a ten year follow up in the hands of the designer Orthopaedic surgeon from Italy.
The advantages of the short stem hip are
A surface hip replacement needs a large incision to implant the prosthesis.
However the short stem hip can be introduced through a small approach. (Minimally invasive surgery or MIS.
This new hip replacement has been performed recently for the first time in South India.