Filling of gaps after removal of teeth varies from patient to patient. That is why your dentist has called you after 20 days. In case your gum sockets are not healed fully after 20 days then he must not start the treatment of complete denture making and advice you to wait for another set of span. there are many qualities of dentures available through labs. Normal (Rs.10,000 and above), colored-lucitone (Rs. 15,000 and above) and flexi denture (Rs. 30,000 and above). flexi or semi flex dentures have good retention properties and thus have better fit in mouth.
Next Steps
Consult nearby dentist for the same