Extracapsular ligament replacement is used in cases of cruciate ligament tears. small dogs frequently used (as well as the TTA methodIn this procedure, a synthetic ligament is placed outside the joint, following the course of the anterior cruciate ligament. The method of fixation varies depending on the specific extracapsular ligament replacement method.
The following extracapsular ligament replacement methods are available:
Source: https://www.southernanimalhealth.com.au/veterinary-surgery/tightrope-procedure-for-cruciate-ligament-repair/
Lateral suture after Flo, De Angelis
Here, the effect of the cruciate ligament outside the knee joint is simulated using a non-absorbable, stable thread by attaching it to the sesamoid bone of the femur and through a drill hole in the tibia.
Lateral thread reins according to Meutstege
An alternative method – very similar to the one mentioned above. A comparison of both methods can be found here:
Tight rope (Arthrex)
Here, the ligament replacement is attached using drill holes in the thigh and shin.
Ruby
Here, the fixation is done with bone anchors in the femur and tibia (Ruby).
Swivelock (Arthrex)
Here, an extracapsular cruciate ligament replacement is applied using a bone anchor.