About this video
Last updated: 9 October 2026
The video says the meniscus lets the curved surface of the thigh bone (femur) meet the flat surface of the shin bone (tibia) over a large surface area. It explains that spreading force over a greater surface area lowers the pressure.
Key points
- It says that when the meniscus is injured, force cannot be spread over as large an area and becomes concentrated in certain areas of the knee, with pain and swelling.
- The video compares a torn meniscus that has moved out of place to a stone in a shoe, which it says causes a lot of pain.
- It says blood supply reaches the meniscus from the outside in, so tears at the outer edge heal well, while repairs nearer the centre sometimes do not work.
- It says assessment, on an MRI scan (a scan of the knee) or during the operation, decides whether a torn meniscus is repairable or needs trimming.
Questions this video answers
What does the meniscus do in the knee?
The video says the meniscus lets the curved surface of the thigh bone meet the flat surface of the shin bone over a large surface area. It explains that spreading force over a greater area lowers the pressure.
Why do some meniscus tears heal better than others?
The video says blood supply reaches the meniscus from the outside in. The outer edge is well supplied, so tears there heal well, while toward the centre of the knee the supply decreases and a repair sometimes does not work.
What options does the video describe for a torn meniscus?
It says most people will either have surgery to remove the unstable piece or, if the meniscus is repairable, have it repaired. It says assessment, on an MRI scan or during the operation, decides whether it is repairable or needs trimming so the unstable part does not cause trouble.
