In the future I intend to do leg lengthening. I have already decided that my femurs will be lengthened between 4,5 and 5cm through an internal method.

As many of you guys, one of my major concerns are the risks associated with it. This being said, I would love if you could give some information regarding these three questions:

1) what are the pros and cons of the antegrade (hip) and retrograde (knee) insertion of the nail?

2) Is there any corrrelation between the retrograde approach to femurs and knee pain?

3) How does the insertion of the fitbone and precise nail in the retrograde (knee) approach avoid damaging the patellar tendon? Isn't it blocking the insertion of the nail?

Antegrade vs Retrograde method (femurs)

Thank you for your time  Antegrade vs Retrograde method (femurs)