Composite Resin Fillings Question About Composite Resin Fillings And/or Build-ups.?

Question about composite resin fillings and/or build-ups.? - composite resin fillings

I had the outer casing of a molar rest after eating an olive oil with a hole. The tooth had an old silver filling, was drilled and replaced with composite fillings. The tooth is like new. The dentist said, no pain) after two weeks (nerve injury, and does not require a root canal, I can between leaving things as they are, or maybe get a ring of protection in the future, you choose.
Not sure where to go. He is concerned about the future breaks. After another burst future, it can break, which can repair the same way. On the other side can split into two halves and is extracted. Only about 10% of the population are becoming more crack like that.
Suggestions?