Renewed popularity
Since the early 2000s, there has been renewed interest in partial knee replacement because of improved implants, better instruments, more careful patient selection, and evolving surgical technology.
Reasons for renewed interest
- Patients' demand for smaller incisions, shorter hospital stays, and near-normal range of motion
- Improved implant materials
- Better design
- Better instruments
- Introduction of robotic-assisted surgery
Patient expectations
The renewed interest was driven partly by changing expectations. Patients often want small scars, short hospital stays, and near-normal knee function after surgery, which total knee replacement cannot always deliver.
Implant and technique improvements
There has been significant progress in metals, alloys, implant design, and surgical instruments. Stronger and more durable materials have helped address some of the early causes of failure. The instruments needed to implant the prosthesis have also improved, making smaller-incision surgery more practical.
Robotic assistance
More recently, robotic-assisted surgery has further contributed to the renewed interest in partial knee replacement. Robotic systems can improve precision in bone preparation and implant positioning. The long-term effect of robotic assistance on implant survival is still being studied, but the technology has increased confidence in alignment and reproducibility.