Its difficult to say without taking a look at the xray or seeing you.
The decay may be too deep causing pain. Or decayed too much that it requires removal
Retained milk teeth might shake over time and needs to be replaced if permanent tooth not present.
Implant is the best way of replacement if a tooth cannot be saved.
Implant costs start from 25000 upwards for good brands.
Answered2017-07-01 03:18:41
Let others know if this answer was helpful