(Concern) Managing the crowned molar

As I get a little older, I feel even more that the condition and care of my teeth are becoming increasingly important. In fact, one thing I didn't realize when I was young is health. As the saying goes, among the eight blessings, good teeth are one of them. Perhaps because of that, my gum health has been deteriorating lately, and on top of that, I have many concerns about my crowns. Especially since my teeth are not very healthy to begin with, I had many cavities when I was young and went to the dentist a lot. Since I have had most of my dental treatments done, I need to take good care of them now, but honestly, I sometimes feel lazy or annoyed about it. That might be why I find going to the dentist the most frightening. Also, since I use a crowned molar, I worry about how long I can use it properly, considering there is a lifespan for crowns. And I do use dental floss regularly, but I am most curious about whether there are specific methods for caring for crowned molars...ㅠㅠ