Local orthopedic? You should be consulting the doctor that did the LL. From what posts from you I've seen till now, your doctor appears very shady..
It was just.. how casually that post spoke of limb amputation. Generally "very rare cases" or percentages of it happening are given.
If anyone knows the answer to this, help me out:
Would a doctor know a bone infection from regular checks/X-Ray? That crap worries the hell out of me.
No, I don't think they would and this is part of makes an internal infection so serious, because it is hard to spot there might be serious effects before treatment is applied.
I believe you are from India?
Lower infection risk is one of the major advantages of going with a more expensive surgeon from say western Europe or N. America, they apply very rigid sterilization policies. In fact a large part of their cost is paying for the surgical equipment as it isn't reused.
I will again stress that the chance of infection when doing internal lengthening is very low, you're more likely to be run over when walking outside.