Hello dear student !

MBBS is bachelor in medicine and bachelor in surgery whereas BDS is bachelor in dental surgery. So MBBS , basically , is a broad field whereas BDS is somewhat restricted. But if you are not able to make through in MBBS then for sure you can go for BDS if you want to become a doctor. Of course , MBBS has more scope for future but BDS is not that less and it if obviously good to opt it. But you have to prepare yourself to deal with teeth of people and it's study.

Hope this will help you

All the best!