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Arthroplasty is a knee joint replacement procedure in which the injured joint is completely replaced. One of the most common reasons that force people to have knee joint replacement surgery is severe knee pain, caused by injury, accident, chronic illness or knee joint wear, which can be attributed to many factors such as knee pain.
That may depend on the knee, the knee, the patella or ... or the age of the person since knee wear is usually directly related to age.
This severe pain itself depends on many factors such as the location of knee pain that may be behind the knee, below the knee, patella, or age, because knee wear is usually directly related to aging.
The performance of these artificial joints is natural and typically lasts a long life depending on the conditions and usage. But If too much pressure is applied to the joint due to overweight, heavy physical activity, etc. during life, it can be fractured, dislocated, or detached.
knee joint replacement

Requirements for knee arthroplasty

To perform arthroplasty, you should consult a specialist. Before surgery, the patient's entire family medical history is prepared and reviewed. The doctor who performs this surgery may perform other tests to understand the function of your joint.
Your doctor may prescribe bone density testing or magnetic resonance imaging (MRI) to examine the joints.The patient can drink fluids up to 3 hours before surgery. If your doctor advises, be sure to follow it.
Before surgery, talk to your doctor about all the chemical and herbal remedies you have taken, and tell him or her about all your medication allergies and any health problems you may have.

The most appropriate age for knee replacement surgery

Since the life span of the prosthetic joints is 20 to 25 years, it is best not to do this surgery before age 60 unless the patient has no other choice.
knee joint replacement

Types of knee arthroplasty

  • Total(Complete) knee replacement
    Most knee arthroplasty surgery involves a superficial joint replacement of the femur and a superficial joint replacement of the tibia. Complete knee replacement may involve replacing the surface below the knee socket (patella) with a flat plastic prosthesis. Some surgeons prefer to preserve the normal patella of the knee where possible, but sometimes this decision must be made during surgery.
    Another common method is to use a removable plastic prosthesis that is not attached to metal parts. This method may help reduce erosion in new joints but has shown that it does not produce better long-term results.
  • partial knee joint replacement
    partial replacement of the knee joint is usually performed for the inner part when arthritis affects only one side .The knee consists of three parts: the middle, lateral, and knee bowl. If arthritis affects only one side of your knee, it is usually possible for the inner part of the knee to be replaced (partial replacement). Since this method has less interference with the knee than the total knee replacement method, it recovers faster and has better performance. Partial knee replacement can be done by making a smaller incision than the complete knee replacement procedure, and this is a minimally invasive procedure.
    In younger people, there is a greater chance of bone preservation, which can be useful in the case of corrective surgery. For the elderly, partial knee replacement is associated with less pain and less risk of bleeding. But the outcome of the surgery depends on the type of osteoarthritis rather than the age.
  • Patellofemoral Arthroplasty (patella (kneecap) replacement)
    It involves replacing the lower surface of the kneecap and trochlea because the only areas affected by arthritis are the kneecap and the trochlea. Only the lower part of the kneecap and trochlea may be replaced because the only areas affected by the arthritis are them, also known as patellofemoral arthroplasty. This surgery fails more than the Total knee joint replacement, which may be due to the progression of arthritis to other parts of the knee

How long does knee surgery take?

Depending on its complexity, the surgery may take from 45 minutes to more than two hours.

How to recover after knee replacement surgery

Most people can be discharged from the hospital one to four days after surgery. You should plan for your wound care and see your doctor from six weeks after surgery regularly.

Cost of knee replacement

In knee surgery, a plastic joint is used and the main part of your cost is related to the price of the joint. If you need ICU and CCU hospitalization after surgery, your cost will increase. There is no fixed price for this surgery because it can vary from person to person depending on the type of the surgery that patient need, the condition of illness and the severity of your surgery. But generally it starts from 1320$ .


  1. Zongezile Tokoza says:

    I have a problem with a knee joint. It is lose because of stroke. Therefore i need a help. My contact No. is 0786508599 Zongezile Tokoza. I used medical aid which is GEMS for a government.

    Rating: 5.00/5. From 3 votes. Show votes.
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    • Faezeh Soltanpoor says:

      Hi, we will call you.

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  2. Like!! I blog frequently and I really thank you for your content. The article has truly peaked my interest.

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