Hi itsmylife, hope you are in good hands. I guess there are 2 different types of complications involved in these two methods. With 8cm one segment it might be the case of weaker callus formation, weaker muscle growth around the lengthened bone and Achilles tendon complications. I also doubt if you can stretch your Achilles tendon that much, and how much of stretched length in tendon is permanent and how much is temporary - that is, it stays alright as long as you stretch daily though out your life? Could you ask this query to your doctor? And the complications in the second method might be simply due to greater trauma and scar tissue as you said.
So its a trade off between two, imo 2 segments is better
I am in good hands, as far as my research goes:
1. Both doctors are traumatologists, which requires much more skill than cosmetic LL
2.They are widely praised and recommended in Russia and Russian forums (I did a search with the doctor emails)
3. Two patients here recovered uneventfully. One patient recovered well even though did not follow instructions and lengthened so fast, and didn't walk or do PT.
I think each individual is differnet. For me, I do not have any equinus contracture. yes my dorsiflexion is about 10 degrees worse, but I still have 10-15 degrees on both legs. I am already at 5.3 cm, so I think that is a good sign. Some doctors "guarantee" you will get ballerina at 5 cm. My doc said: if you stretch and walk more, you will not get it. Its true. RGKey did 9 cm. He didn't get it at any phase.
My doctors do femur. In fact, they asked me to do 8 cm tibia and 4 cm femur for the "perfect" ratios. But, after my operation, I don't know why but Prof Bagirov said its better for me to avoid femur surgery. They do femur, because a rusian patient who I was with, did femur lengthening on one leg, together with two legs (she had unbalanced femurs). But I think Prof Bagirov was concerned I cant handle the pain, because femur is very painful cf. to tibia.