Knee Replacement Surgery Success Rate, Statistics, And Outcomes

Knee Replacement Surgery Success Rate, Statistics, And Outcomes

Knee replacement surgery is a surgical procedure in which the doctors remove the damaged knee joint by artificial implants of metal or plastic or both. The main reason why people undergo knee replacement surgery is arthritis, that is why it also refers to arthroplasty.

There are two variants to knee replacement surgery. It can be either a full knee replacement or a partial knee replacement. In a full knee replacement, there is the replacement of the whole knee joint while in partial knee replacement there is only replacement of the damaged part of the knee preserving the healthy tissue.


Various international medicine and surgical institutes have presented database reports showing the percentage of people all across the globe undergoing full knee replacement. According to these reports, every year 40-50 percentage of people above the age of 50 undergo this procedure. Surprisingly over the decade, this percentage has increased to 55 to 60%. This number gives rise to a number of health issues that people have around the world. There are a few reasons that are justified by various medical institutes in regard to the increasing number of people with problematic knees. Few of them are :

  • Arthritis:

Arthritis or specifically osteoarthritis is the major reason that people undergo full knee replacement. osteoarthritis is an auto-immune disease in which there are wear and tear of cartilage and tissue that support the knee joint. This results in pain and discomfort in the knees. The pain can also get unbearable. It interferes with the movement and with day to day activities. The number of people having osteoarthritis is usually in the age group of 50-70 years of age. Once a person gets osteoarthritis, there is no option left other than going for a full knee replacement.

  • Obesity:

As we all know that knees provide mechanical strength to hold the body weight. So it is important to have strong knees. But due to obesity or overweight, our knees tend to lose their strength and are not able to hold the extra pounds of the upper body. With time, knees get weak and need external support to do their normal functioning. The number of obese people is rapidly increasing leading to various diseases, damaged knees being one of them. This is another reason why people undergo knee replacement surgery.

  • Sedentary lifestyle:

With the introduction of various new technologies and online platforms, people are turning toward living more indoors rather than going out and performing some physical activities. This results in less movement of the body. If this continues for a longer period of time, there is a chance of getting weak bones and joints especially the knee joints. As people get older, they suffer more than a regular healthy person getting into old age. If you are young and want to avoid such complications in your old age, it is important to maintain a healthy lifestyle. According to some reports, 10-15% of people that undergo full knee replacement are the ones with sedentary lifestyles leading to such complications.

Knee Replacement Success Rate

Knee Replacement Surgery is one of the mainstream surgeries in medicine. This procedure is existing in medical science for more than half a century now. So, there are many improvements and innovations in the techniques and tools that are being used during the surgery. With this, the success rate of the full knee replacement has jumped from 40-50 % upto70-80 % in less than 10 years. This surgery is a huge success in the orthopedics, solving problems of many people ultimately leading them toward their normal living.


Every procedure has its own pros and cons. Although there is a huge success rate with full knee replacement there are a few disadvantages that are related to it.


  • Relief from pain and discomfort:

 The main purpose of undergoing a knee replacement surgery is getting relief from pain and discomfort that people are going through every day.

  • Cost-effective:

 Full knee replacement is advantageous for people with a normal financial background. The reason is, this kind of surgery is comes under every health insurance available.

  • Lesser risks:

 As the knee joints are not surrounded by vital body parts, so it is easier to operate. Therefore, making it a low-risk procedure.

  • Easy recovery:

 Post-surgical recovery for full knee replacement is very easy. It is generally recommended to have bed rest of about one to two months. After this, you can continue doing normal activities.


  •  Restrictions:

 Even though you can continue your normal living after need replacement surgery but there are few physical activities that are strictly prohibited for the entire lifetime.

  •  Side effects:

 Some people have reported having unbearable side effects after undergoing full knee replacement. This is generally due to natural immune responses and anti-inflammatory drugs that doctors prescribe after the surgery.

  •  A revival of pain and discomfort:

 Many people after a few years of having knee replacement surgeries reports having pain and discomfort which they experience before the surgery. This can be due to the underlying causes of damaged knees that are overlooked while performing the surgery.