Understanding Knee Replacements

Knee replacements are among the most common orthopaedic procedures, often recommended for patients with advanced arthritis or significant joint damage. However, not all knee replacements are the same. Depending on the extent and location of the damage, your surgeon may recommend either a total knee replacement (TKR) or a partial knee replacement (PKR). Understanding the difference between these two options is an important step in making an informed decision about your care.

Partial vs Total Knee Replacement?

A total knee replacement involves replacing all three compartments of the knee joint with artificial components. While effective in reducing pain and improving mobility, it can reduce overall knee function by approximately 25% compared to a healthy, natural knee.

In contrast, a partial knee replacement targets only the damaged portion of the joint, preserving the healthy structures. This approach often results in more natural movement post-surgery, less trauma to the surrounding tissue, and a quicker recovery time. In fact, partial knee replacements are sometimes referred to as the “forgotten knee”, because patients often forget which part of the knee was previously affected due to the restored, near-normal function they experience.

Who Is and Isn’t Eligible for a Partial Knee Replacement?

The knee joint is divided into three compartments. The most important for weight-bearing are the medial and lateral tibiofemoral compartments. If only one of these compartments is affected, for example, due to isolated osteoarthritis or wear, then a partial knee replacement may be an appropriate and effective treatment.

This kind of damage is often compared to a pothole forming on one side of a road: if left untreated, the wear may eventually spread to both sides, at which point a total knee replacement becomes necessary. However, when caught early and limited to a single compartment, partial knee surgery can deliver excellent outcomes with fewer long-term trade-offs.

Many patients assume that a total knee replacement is the default approach, but research and clinical experience show that more than 50% of patients requiring knee surgery are suitable candidates for a partial replacement. In Dr Oosthuizen’s practice, this number is often even higher, thanks to careful screening and a conservative approach that prioritises joint preservation whenever possible.

A More Targeted, Less Invasive Approach

Partial knee replacement is part of a broader movement within orthopaedic surgery that embraces more precise, patient-specific care. While total knee replacement has been the gold standard for the past four decades, particularly in cases of advanced osteoarthritis, the growing success of partial knee procedures reflects advancements in medical technology and surgical technique. For eligible patients, the benefits include shorter hospital stays, reduced pain, and more natural knee function over time.

Next Steps for Patients Considering Knee Surgery

If you’re living with persistent knee pain and have been advised to consider surgery, it’s worth exploring whether a partial knee replacement might be right for you. At Johannesburg Surgical Hospital, we offer advanced diagnostic imaging and expert consultation to assess your joint health and identify the most appropriate treatment path. With specialists like Dr Oosthuizen, who has a particular focus on partial knee procedures, you can be assured of a care plan built around long-term mobility, comfort, and quality of life.