I used to wear a heal lift...but I found that they mashed down to fast! So I had my shoe lifted. My leg length descrepancy is 2cm though...so I walk funny without it. It actually makes my back feel better. When I don't wear it I really hurt. Don't think it does any harm to the back...if anything it probabily helps cause you aren't putting as much stress on everything walking funny. Hope this helps!
Diagnosed in '06'
Wore TLSO brace for 18 mo.
Upper curve 40 degrees; lower 35 degrees
Surgery in March '08' (T6 - T11)
Rods for 7 vertabraes; 3 fused
Still have lumbar curve (T12 - L4) of now, 33 degrees
I have osteoarthritis, 3 bulging discs, stenosis, fast progressing lordosis, vertebrea twisting (vertebreas almost on side) all in lumbar spine. Will most likely have another surgery to extend rods and fusion. :'(