About this video
Last updated: 9 October 2026
Rotational instability is when the knee does not just give way in a straight line but also twists or pivots uncontrollably. LET and ALL reconstruction are described as extra procedures on the outer side of the knee that can be added in certain cases, such as primary ACL reconstruction for athletes in pivot-heavy sports.
Key points
- The video says the ACL plays a central role in stabilising the knee, and the ALL and surrounding structures are also involved in managing rotational stability.
- When these structures are compromised, the knee can feel unreliable, especially during high-impact activities or sudden direction changes.
- For revision ACL reconstruction, where a previous graft has failed, the video says a combined ACL and LET or ALL procedure is often considered.
Questions this video answers
What is rotational instability in the knee?
The video describes it as the knee not just giving way in a straight line but also twisting or pivoting uncontrollably. It says the ACL plays a central role in stabilising the knee, with the ALL and surrounding structures also involved.
When might an extra procedure be added to ACL surgery?
The video says that in certain cases, such as ACL reconstruction for athletes in pivot-heavy sports, or revision surgery after a previous graft has failed, an extra procedure on the outer side of the knee (LET or ALL reconstruction) may be added or considered.
In this video
- Introduction
- Rotational instability
- When an extra procedure may be considered
