It depends on several factors. Basically if you are going for a fixed orthodontic treatment again it depends on the quality and types. Generally anywhere between 12-18 months
I assume that your question must be regarding to your orthodontic treatment which requires extraction of your 4 premolars.
12 to 18 months to be precisely accurate.
I have this since 4 months no change or even if any changes I cannot see bcz to me it's seems same no pai
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