1 is a dental implant. Dental inlay is to grind off your original teeth and replace them with porcelain teeth. It's still very nice if it's designed.
But the disadvantage is to wear braces. The price is 200-3000.
2 is correction, and it should not be too late to correct teeth at the age of 20. You can try. The price is 3000- 10000.
What kind of money and goods can best be reflected in teeth. See for yourself.