Orthopedic doctors recommend knee replacement surgery if the patient has to endure constant knee pain or if the patient’s daily life is affected by poor mobility. Patients experience a significant reduction in knee pain after undergoing minimally invasive knee replacement surgery. 

A patient may be suggested a partial knee replacement or a total knee replacement, depending on the condition. The difference between the two depends on the patient’s condition and pain level.

What are the implants used in knee replacement surgeries?

total knee replacement

During the minimally invasive knee replacement surgery, the orthopedic surgeon will resurface the damaged knee with artificial components, known as “implants”.

There are various different types of implants. The type and design of the implant used by the orthopedic doctor depend on many factors, including, the patient’s needs, based on his or her knee problem and knee anatomy, as well as her age, weight, lifestyle, activity level, and overall health. 

The orthopedic surgeon will discuss with the patient the type of implant that will be used for his or her knee replacement surgery and let them know about the benefits of using that particular implant. 

What are the different types of knee implants?

There are several different types of knee implants. The main difference between different types of knee implants is whether the implant would replace the entire joint or only a part of it.  

Different types of implants can be used for minimally invasive knee replacement surgery. The most suitable type of knee implant will depend on factors such as the stability of the ligaments, condition of bones and muscles, and any misalignments such as knock knees, bow legs. Below are the common types of implants used by orthopedic surgeons for knee replacement surgeries- 

  • Non-constrained implants– In these types of implants, the upper and lower part of the implant are not connected to each other. For this type of implant to work, the medial and lateral ligaments of the knee need to be relatively stable as they still coordinate the movements of the knee like bending, straightening, and rotating. For most types of implants, the ACL (anterior cruciate ligament) is removed before the implant is implanted.  
  • Semi-constrained implants- This type of implant is used if the posterior cruciate ligament is not stable enough and needs to be removed. In this type of implant, the two components are connected together with the use of a hinge type of thing, which provides stability.
  • Constrained implants– In this type of implant, the two components for the upper and lower leg are joined together with a hinged mechanism and are attached to the bone on each side with the use of a long stem. Constrained implants might be used if both the medial and lateral ligaments are not stable enough. Other reasons the doctor may suggest this type of implant include poor bone condition and severe misalignments such as knock knees or bow legs.

 It is best to talk to an orthopedic doctor about which types of implant would be suitable for you and what pros and cons they have.

Cemented vs. Cementless Knee Replacement

Cemented implants were used traditionally. Advances in implant technology have led to uncemented knee implants that do not need to be cemented. In case of uncemented knee implants, the textured surface of the knee implant encourages bone growth. So, the implant is firmly fixed to the bone. Depending on the needs of the patient, both cemented and uncemented knee implants can be used for knee replacements.

  • Cemented Implants- Cemented knee implants are fixed into place with fast-drying bone cement which bonds the patient’s natural bone with the implant.  
  • Uncemented Implants- Uncemented knee implants, also popular as press-fit knee implants, have a rough and porous surface that promotes new bone growth. Currently, cementless knee implants are used only for total knee replacement surgeries. The majority of knee implants used in knee replacement are uncemented implants.

Minimally Invasive Knee Replacement at Pristyn Care

Here at Pristyn Care, our goal is to provide the best comprehensive orthopedic care to our patients. Our expert surgeons and medical staff are highly skilled and trained to treat a wide range of orthopedic problems such as knee and hip injuries, ACL tears, carpal tunnel syndrome, etc and provide you the best, world-class orthopedic care. 

If you are looking for the best and most advanced orthopedic care from highly skilled and expert orthopedic surgeons, schedule an appointment with us. Consult the best orthopedic experts in your city at Pristyn Care.