Despite thorough preparation, the risks involved in revision hip replacement surgery are increased several fold from the level of risk of a primary hip replacement. The surgery is more difficult and time consuming, the soft tissues, nerves and blood vessels more difficult to mobilize and protect and the prostheses are more complex to implant properly into the supporting bone. The soft tissues become more difficult to stretch and the pain of revision hip replacement surgery can be an obstacle to full mobilization of the joint. Notably, it is important that patients realize that the revised hip frequently never reaches the same level of function as did the first hip replacement. Complications and chronic pain are far more common with revision hip replacement surgery than it is with primary hip replacement.
In most hip replacements there is a metal stem that is fixed inside the tube-like femur (thigh bone) upon which is perched an articulating ball bearing; and a metal cup that is fixed within the acetabulum of the pelvis (socket) containing a bearing surface on the opposite side within which rides the ball bearing. The socket bearing surface is commonly a plastic (polyethylene) or a ceramic (glass); the ball bearing is commonly a highly polished metal or ceramic. Each of these come is variable sizes and are mixed and matched by the surgeon for various mechanical properties and chosen as each situation demands.
What Are The Symptoms Of Hip Replacement Loosening
In almost all cases, the presenting symptom of a failed hip implant is PAIN! This is especially true if the implant is coming loose from the bone or there is an infection around the implant. Associated symptoms include stiffness of the joint or a persistent limp. In the case of instability or frank dislocation, the hip may feel just fine until which point, with even a slight twist, it disengages from the socket and pops out, leading to sudden pain and an inability to bear weight on the involved leg.
What is hip replacement loosening
At 4 months after surgery and annually, examinations and radiographs should be done to ensure that the hip is still stable and the implants are not loosening. Potential Complications
Signs and symptoms of MoM hip implant ..
In assessing a hip for infection several steps may be needed as the diagnosis of an infection can be elusive. Plain X-ray studies can occasionally be helpful with observed changes at the interface of the bone and metal implant. Various studies including MRI, CT and bone scans may be needed in addition to plain X-rays to assess the character and integrity of the supporting bone. Laboratory studies are frequently collected from the blood and fluid taken from the hip joint in an attempt to validate or refute the diagnosis of a joint infection.
Compare Symptoms Of Hip Prosthesis Loosening Lower …
Lucent lines don't necessarily represent problem - may be present in well-fixed prosthesis (retrieval studies) - often due to remodelling O'Neil & Harris JBJS Am'84 1. Possible Bone-cement lucency - may be due to poor cementing technique - loosening if progressive 2. Probable Cement-implant radiolucent line >2mm wide - progressive 3. Definite 1.
Case Reports: Aseptic Loosening in Total Hip Arthroplasty
Studies have shown that hip replacements, with cemented stems and cementless sockets ( also known as "hybrid" hips) are also very satisfactory.