In principle, as long as there is no serious periodontitis, you can do dental plastic surgery, and even if periodontitis is controlled, you can also do dental plastic surgery, so the requirements for age are not high and the requirements for periodontal environment are high.

Orthodontics is to correct protruding teeth first, and the whole process takes about two years. The cost is around 1w in first-tier cities.

If there are anterior teeth defects, consider making two porcelain crowns, or four. It won't affect your study, just for a week. The medium cost is around 1500. It is an irreversible medical behavior to permanently grind off most teeth, so be careful.