An artificial knee, or knee prosthesis, is held in place using either cemented or uncemented fixation techniques.
Types of Fixation:
| Fixation Type | Description |
|---|---|
| Cemented | A fast-drying bone cement is used to adhere the knee prosthesis to the existing bone. |
| Uncemented | The knee prosthesis is designed to fit snugly against the existing bone, allowing the bone to grow into the prosthesis for secure fixation. |
Cemented Fixation
- In cemented fixation, a special type of bone cement is applied to the surfaces of both the bone and the prosthesis.
- The cement acts as an adhesive, creating a strong bond between the two components.
- This method is often used in patients who have weaker bone, allowing immediate and secure fixation.
- The cement cures quickly, allowing the patient to start physical rehabilitation sooner.
Uncemented Fixation
- Uncemented fixation relies on the natural process of bone growth.
- The prosthesis has a porous surface, which allows the surrounding bone tissue to grow into it.
- This method provides a more natural bond and is suitable for patients with good bone quality.
- Over time, the bone firmly anchors the prosthesis, ensuring its stability.
- This type of fixation may take longer for full integration, which could result in a longer rehabilitation period.
In summary, whether the surgeon chooses a cemented or uncemented technique will depend on the individual patient's needs, the quality of their bone, and other factors. Both methods aim to create a stable and durable connection between the artificial knee and the patient's bone.
