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Unispacer: New Alternative To Knee Replacement Surgery



The Unispacer is used to restore stability and alignment for patients who suffer from arthritis on their inside half of the knee. The Unispacer is a metallic, kidney-shaped tool that is inserted into the knee joint to cure people suffering from arthritis in their knee region. Another usage of the Unispacer is for people who have their cartilages worn away by arthritis. It provides a smooth surface for the bones to glide over and make life easier for that patient. It comes in various sizes in order to conform as closely as possible depending on the size and weight of the patient.

Every year, more than 5 million people who suffer from knee problems visit an orthopedic surgeon. The innovative Unispacer knee system has offered a promising cure for patients who suffer the early stages of such knee problems. In comparison to the conventional knee replacement surgery, this new innovation is a minimally invasive procedure. The surgeon will place this light-weighted metallic inside the knee joint, as opposed to cutting the whole knee and replacing it with something else like in traditional knee surgery.

Risks Involved

Usually, there are risks involved in all surgical procedures. Chances of infection, blood clots, and anesthesia complications are some of the few risks.

There are some general complications which can be expected in knee surgery:

v    Stiffness

v    Weak Knee

v    Numbness around the surgical area

How Unispacer Knee System Works

If early osteoarthritis wear is mainly on the inside half of the knee, it may lead to the space between the two bones of the knee to be reduced, thus changing the alignment of the leg. Because of this, the inside half of the knee is forced to carry a disproportionate weight of the body. This could be one reason for major knee pains.


During the procedure of the Unispacer Knee system, the inside part of the knee is prepared to accept the Unispacer implant. After this procedure is done, the appropriate joint alignment is established.

Alignment maintained with Unispacer Implant

After the above procedures, in order to fill space and also improve the posture alignment, the implant is inserted in between the two bones.

Before and After the Surgery

Before a patient is scheduled for fixing the Unispacer, a few pre-admission tests are carried out. Blood test, Urine test, chest X-ray, and EKG are some of the common tests that are carried out. A day prior to the surgery, the patient is required to fast and also regulate their medications, as suggested by the surgeon.

A team of professionals consisting of an orthopedic surgeon, anesthesiologist, and nurses will guide you at every step before and during the surgery. The surgery is carried out under general anesthesia. After surgery, doctors keep an eye on the patient’s vitals and are under observation. Only after all the vitals are normal is the patient shifted to the regular room. Wound care is a major concern after the surgery in order to ensure there is no infection. Trained nurses change the dressing and take care of the wound as well as administer pain medications.

Once the patient has recovered, he may be required to wear knee braces for some time and also make use of the Continuous Passive Motion (CPM) machine which helps to improve the patient’s range of motion. Since most patients experience pain after the surgery, medications are given long after the surgery.


After many studies, it was determined that although a very effective alternative, it also has a high failure rate; especially in the treatment of degenerative arthritis of the knee. There is also a high rate of revision in a short span of time, thus it is important to be careful while selecting this implant. Revision surgery is possible but is associated with many risks. That being said, Unispacer still has very high potential to become a premium alternative to knee surgery as it is less demanding as well as is minimally invasive, requiring less surgical intervention.  In comparison to traditional knee replacement surgery, Unispacer surgery does not require any cuts to the bone thus preserving the natural bone.