Midvastus Knee Replacement

For the majority of patients, total Knee Replacement surgery for osteoarthritis has been shown to be successful in relieving pain and improving function and quality of life. However, continued efforts are put in to further boost the outcome of total knee surgery by trying to improve implant design and the type of surgical approach used. The term “Minimally Invasive Joint Replacement Surgery” covers a variety of approaches including midvastus.

The midvastus muscle-splitting approach is done through a standard anterior midline skin incision. The incision is carried down through subcutaneous tissue and deep fascia to expose the quadriceps musculature.

In recent years interest in minimal-incision total knee arthroplasty (Total Knee Replacement) has increased. There are many advantages of minimally invasive techniques (MIS) used like faster functional recovery, shorter hospital stay, and better range of motion for the knee. It is a well-known fact that the long-term outcome of total knee replacement is associated with the component position and ligament balance. The smaller incision in MIS may be associated with an increased risk of misaligned components due to limited visualization. Misaligned implants in total knee replacement have been associated with implant failure and poor long-term functional results.

The same accuracy in component positioning as the standard medial parapatellar approach can also be achieved through the mini-midvastus approach. The key points of success in the mini-midvastus approach are a precise surgical technique and sufficient visualization of anatomical structures during implantation.