You should always choose the course according to your interest and passion. So, that you can grow in that field.

There is a good scope after completing your BDS.

If you want you can do job after BDS or you can go for higher studies. 

After completing your course as a fresher you can get salary around Rs. 15,000 to 30,000 per month with gaining experience you can easily earn 4 to 6 lkhs per annum. 

If you want you can also try for MBBS programme as it has better scope then BDS in terms of Jobs and salary and entrance exam for both is same.

All the Best!!