When one compartment of knee joint is arthritic then replacing this part with metal and plastic joint known as unicompartmental knee replacement. As compare to total knee replacement whole joint cartilage is not replaced. Benefit of this operation is that patient can bend the knee fully and can squat. Hospitalization for this surgery is just two days.
The partial knee replacement surgical procedure has generated significant interest because it entails a smaller incision and faster recovery than traditional total joint replacement surgery. Partial knee replacement, also called unicompartmental knee replacement' and 'minimally invasive knee surgery,' removes only the most damaged areas of cartilage, and replaces these surfaces.
|Implant||Bone Model||Post op X-rays|
The minimally invasive partial knee replacement is indicated in patients who have unicompartmental severe arthritis of the knee that had failed conservative treatments may consider this procedure. Conservative measures may include, but are not limited to, medications, cortisone injections, strengthening exercises, and weight loss. If these treatments are not adequate, and you as a patient are not satisfied, then surgical procedures may be considered.
The partial knee surgery may be possible if the arthritis in the knee is confined to a limited area. If the arthritis is widespread, then the partial knee replacement is not appropriate, and should not be considered. In addition, the partial knee surgery is recommended in patients who are:
If these qualifications are not met, then the minimally invasive partial knee surgery may not be as successful. Unfortunately, many patients are therefore ineligible for this minimally invasive procedure.
The long-term results are very good when the minimally invasive partial knee replacement is done in the right patients. Older studies showed very poor results of the partial knee replacement, but these results are thought to be due to poor patient selection. If the minimally invasive procedure is done on a patient with too widespread arthritis, the results are very likely to be less than satisfactory.
Most patients who seek surgical management have arthritis that is too advanced for the minimally invasive partial knee replacement procedure. Because surgical treatment is considered a 'last-resort' by most patients, by the time surgery is necessary, their arthritis is too advanced to consider this minimally invasive procedure. If partial knee replacement is done in a patient who is a poor candidate, failure rates can be high, and conversion to a traditional total knee surgery may be more difficult.
Hopefully not. When patients with a partial knee replacement are properly selected, the minimally invasive procedure is quite successful. That said, some patients continue to develop arthritis in other areas of the knee. Also, some patients wear out the unicompartmental knee implant, or it may come loose within the knee. All of these situations would require additional surgery, and possibly the conversion to a total knee surgery. Conversion from a partial knee replacement to a total knee can be more difficult because of the prior surgery, but it is not uncommon and results of conversion are good.
Other potential complications that should be discussed with your doctor prior to a partial knee replacement include infection, blood clots, and problems with anesthesia. It is important to have a long discussion with your doctor about the risks of this minimally invasive surgery, or any other procedure, prior to your operation.