As often it was mentioned on this forum maximal lengthening amount usually cant exceed 10-20% of segment length (for tibias usually 4-8 cm.), otherwise patient has big chance to become crippled. But can one big surgery be replaced with 2 small surgeries with big time pause to decrease risks?

For example if someone want to lengthen tibias for 9 cm (almost guaranted complications), can he at first do surgery for 5 cm, then wait 1-2-3 years and make second surgery for 4 cm? Will it be more safe than one big surgery? Will the second surgery be more dangerous than common 4-cm tibia surgery?

I know that dwarfs do several surgeries on one segment and get big height gain, but how it will work with initially healthy man?