I want to know that replacing resin fillings constantly year by year can lead to tooth loss or further breakage of tooth structure?

What's the problem?: If you constantly need to have your fillings replaced year after year then something is wrong.I can't tell you over the internet if it's because of improper oral hygiene & diet leading to frequent cavities, poor dental treatment, having fillings done instead of crowns or what. Perhaps a combination of all of these factors. Ask your own dentist why & if unsatisfied with the answer, see another dds.

Replacing fillings: A natural tooth without decay or fillings is a very strong structure, resistant to tremendous bite forces. A compromised tooth (fillings and/or cavities) on the other hand is much more prone to fracture, so yes, the more tooth structure that is missing due to increasingly larger decay or fillings can lead to tooth loss or further breakage. A crown over the tooth will actually strengthen it.