What is the probability of bone growth 10 mnth post L3-S1 fusion after removal of growth stimulator&complete non-union at L3L4 with 2 loose screws L3?

Ans. First you must why is there no bone growth in a 30 yo? Are you a heavy smoker ? You need a bone density test. You need to eat better and do some passive exercise. There is calcium you can and should take. Better get going or you will have more problems as you age .