Knee Replacement Surgery and Knee Cap Replacement


  • What is the Purpose of Knee Replacement Surgery?
  • Which Patients Are Performed Knee Replacement Surgery?
  • How is Knee Replacement Surgery Performed?
    • How Long Does the Surgery Take?
    • Possible Complications in Surgery
  • Physical Therapy After Knee Replacement Surgery

Knee replacement surgery is applied to the knee joint. The knee joint is the largest and most complex joint in the body; It carries body weight and enables movement. There is a cartilage layer that facilitates movement on the joint surfaces of the bones that make up the knee joint, and there are menisci in between. In addition , the intra-articular fluid called synovial fluid reduces friction during movement.

Due to reasons such as osteoarthritis , trauma and  rheumatoid arthritis , deterioration of  the joint that makes normal movement difficult and creates pain may occur.

What is the Purpose of Knee Replacement Surgery?

The aim of knee replacement surgery is to provide the patient with a painless and mobile joint by replacing the damaged joint surfaces . In this way, it is aimed to increase the quality of life of the patient.

Knee replacement surgery can be recommended if the knee joint is damaged, especially if the knee joint is damaged, if the person has started to have difficulty in movements such as walking and climbing stairs as a result of various  arthritis  or traumas, if the knee continues to hurt even when resting, and if methods such as physical therapy are ineffective.

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Which Patients Are Performed Knee Replacement Surgery?

  • Having knee pain and stiffness that limits daily activities and activities such as climbing stairs, sitting up, walking
  • Severe knee pain awakening at rest and at night
  • Chronic knee inflammation and edema that does not go away with rest or medication
  • Severe deformity of the knee   (leg bent inward or outward)
  • Knee replacement surgery is recommended for patients who do not benefit from treatments such as weight loss, exercise, physical therapy, pain relievers, intra-articular injections ( cortisone ,  viscosupplementation , PRP ,  etc.).

Surgery is recommended according to the patient’s level of pain and limitation. Age alone is not the determining factor. Most knee replacement surgeries are performed between the ages of 65 and 80. However, younger or older people can also be operated on.

With knee replacement surgery, the success rate is over 90% in terms of pain reduction and comfortable daily activities . However, depending on the type of prosthesis placed after the surgery, it may be necessary to stay away from activities that expose the knees to high stress, such as running, jumping, tennis, and skiing for life. It is recommended to do activities that do not strain the knees, such as walking, swimming, cycling, light dances.

How is Knee Replacement Surgery Performed?

The damaged cartilage on the sides of the thigh (femur) and tibia (tibia) bones facing the knee joint and a small part of the bone underneath are removed. Instead, metal components are placed to regenerate the joint surface. The posterior articular surface of the kneecap is cut and replaced with a special plastic surface. In some surgeries, the kneecap is not touched. A specially manufactured plastic separator is placed between the metal components for ease of movement.

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How Long Does the Surgery Take?

This surgery takes about 1.5 – 2 hours. However, this time may change with the stages of entering and exiting the operating room and preparing for the surgery. After the operation, the length of stay in the orthopedic service is as short as 1-3 days. However, in order to increase the success of the surgery , the physical therapy process continues after discharge.

Possible Complications in Surgery

There is also the risk of undesirable results such as fracture, infection, loosening of the prosthesis, formation of intravascular clot, loosening of the kneecap, vascular or nerve injuries and pain relief. The rate of serious complications is low.

Physical Therapy After Knee Replacement Surgery

In order to return to daily life as early as possible after the surgery and to reduce the risk of complications, physical therapy should be started in the early period. Exercises usually start on the same day after surgery.

Physiotherapist; teaches the patient exercises that will increase joint movement and muscle strength, accelerate circulation and develop lungs. It also trains the patient to sit, stand, and walk. In the first days, the use of a walker or crutches during walking may be recommended.

Generally, the person can return to his normal daily life within 3-6 weeks after the surgery. It is normal for mild pain to persist for several weeks during movement. The walking distance is increased day by day. Special exercises continue to be applied to strengthen the leg and bring the movements back to normal.

Most people who have this surgery can do their exercises at home, but some patients may need physical therapy in an outpatient or inpatient physical therapy center.

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