Lingual braces are relatively more technique sensitive so its relatively costly. Prices varies according to severity of your problem, choice of material (metallic, ceramic, Invisalign
) dentist's quality and experience and different places in world. In Dehradun, it will be about 40k to 75k.
There is absolutely no side effects in long run. Not even in a single patient. Mishaps happens when quakes do it. So please consult only a qualified MDS orthodontist
. Since you are 34 now, duration of treatment may increase in your case. Probably from 1.5 years to 2.5 years. That's all.