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An artificial hip joint is the prosthesis which consists of a Socket, aBall and a Stem. This prosthesis is used to replace the damaged hipjoint.
Socket (or Cup) is usually made up of two parts, an outer metalshell and inner smooth surface called a liner. The entire socket mayalso be made of plastic. The socket is press fit into the bone usingscrews or fixed using specialized bone cement.
Ball (or Head of femur) is made of stainless steel alloy or ceramic material and fits perfectly into the Socket / Cup.
The Stem is also made of stainless steel alloy and fixed into the thigh bone (Femur) which could either be cemented or press fit without cement. The stem mounts the Ball / Head on top of it.
MAY, 2015 : LR 82 years old gentleman fell at home and sustained fracture intertrochanteric femur which was operated with DHS. Due to poor bone quality the implant failed. Conversion cemented Total Hip Replacement was done . However due to poor bone quality acetabular component got debonded from the parent bone and he presented with hip dislocation after 1 week of surgery .
Revision acetabular reconstruction was done with Muller s ring and constrained polyethylene acetabular component. Post operatively patient is walking comfortably.
At Delhi Institute of Trauma & Orthopaedics, in Sant Parmamand Hospital, we perform very complex knee and hip replacement surgery. One of the most complicated types of joint replacement surgery is revision hip replacement surgery. This surgery involves removing a previous implant that was in the hip joint that has become damaged due to injury or wear and tear and replacing it with new more advanced hip implants. This requires extremely high surgical technique and the surgery can often last many hours as the surgeon has to take many factors into consideration such as the age of the patient, the type of bone quality he observes in the patient, and the extent of damage found inside the joint or adjacent areas.
As an example, a 53 year old gentleman was presented to our hospital with pain in the right hip following a road traffic accident. He had a total hip replacement done 10 years prior to the accident and was walking comfortably before the accident. X-rays revealed a fracture of the pelvic bone (acetabulum) with posterior dislocation of the acetabular component. Fixation of the acetabulum fracture with screws followed by revision of the acetabular component with an uncemented cup was performed. As the femoral component was well fixed, it was not revised.
Essentially in this patient, we had to revise one component of the hip implant, and add screws in the pelvic area to give support to that area so that the bone unites where fractured. Post operatively, the patient is walking comfortably.
Delhi Institute of Trauma & Orthopaedics is one of the leading orthopaedic hospitals in India. Our teams of surgeons are dedicated to learning and practicing the most advanced surgical techniques and handling the most complex surgical cases.
MAY, 2015 :