If internship not complete in time that UP dental council give, then you maybe not get registration or delay happen, you need go to dental council office and talk with them, give them reason why you not finish in time, if valid reason like medical or family issue then maybe they allow extension or give another date to complete, but if without reason then maybe fine or some problem, so better go and talk soon, also take proof of what you done

1, Delay in internship mean no registration

2, You need talk with UP dental council soon

3, Give valid reason with proof

4, They may give chance or extension

5, Without talk problem may increase

https://www.careers360.com/courses/bds-bachelor-of-dental-surgery