Loosening of hip prosthesis | Radiology Case | …

The sciatic, femoral and obturator nerves may all be injured during hip replacement surgery. Although every effort is usually made to avoid these problems the nerves may be cut, cauterized or stretched. The nerve may be stretched as it crosses the knee during the operation. When the nerves have been stretched weakness of the foot may be noticed post operatively. Usually a spontaneous recovery occurs, but this can take several months. A foot support or splint may be utilised during the period of weakness. Sciatic nerve injuries tend to be more common than femoral or obturator nerve injuries.

Infection of the hip prosthesis may require removal of the prosthesis and antibiotic treatment.

A fracture may occur to the tube-like femur bone within which is fixed the femoral prosthesis with either bone cement or biologic attachment, or to the supporting bone of the pelvis to which is fixed the acetabular prosthesis. There is a wide variety of fracture patterns which occur, each having many possible solutions. A patient’s age, activity level and overall health will be weighed along with the various options to repair a fracture around a hip replacement.


Loosening of the Hip Prosthesis - MedStar Union …

Infection of the hip prosthesis can also take place if the dog develops an infection elsewhere in the body.

These can occur from screws which are inserted to hold the acetabular cup in place. Penetration of the femoral bone by the prosthesis can occur with difficult revision hip surgery, particularly in patients with bone stock loss and osteoporosis.


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Motion of the joint will generally improve. The extent of the improvement will depend on how stiff the joint was before the operation. An extremely stiff joint will continue to be stiff for sometime after total hip joint replacement. A hip joint replacement can enable a person to perform the activities of daily living without pain and stiffness.

cementing techniques on component loosening in total hip replacement.

The major causes of failure in hip replacement are: dislocation of the joint, loosening of the stem and cup, and failure of the stem. Dislocation of the prosthesis can occur immediately after surgery if you move your leg into a prohibited position. It is therefore necessary to avoid extremes of , , and for about 12 weeks until a thick capsule forms around the artificial joint. If you dislocate, you will need to be put under deep anaesthesia so your hip muscles can relax sufficiently to allow the artificial hip joint to be reduced. Care should be taken to avoid dislocation as the sciatic nerve, which supplies large leg muscles, is in danger of damage when your hip dislocates.

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This is the most devastating complication and is fortunately uncommon (1 – 2% of patients). If infection cannot be eradicated by antibiotics, removal of the components may be required. Infection can occur at any time but often appears some time after the hip surgery. The incidence of infection is increased in patients with rheumatoid arthritis, an existing infection, obesity, diabetes, alcoholism and those patients who are taking immunosuppressive drugs and steroids.

What Are The Symptoms Of Hip Replacement Loosening 2.5 out of …

Loosening of the stem component is a late complication that most often occurs 5-10 years after total hip replacement. It can be confirmed with X-rays. Risk factors for this include age (less than 50 years -- such people usually being more active), weight (more than 80 kilograms), and a high level of physical activity at any age. Mild trauma can fracture the femur around a prosthesis stem, especially if the bone is osteoporotic.