Unfortunately, many things deteriorate over time. This also goes for the best dental crowns. They must be restored every so often, because you put pressure on them while chewing and biting down.

The crowns need to be replaced repeatedly by teeth-grinders. This will smooth down a dental crown, no matter what it's made from. If you're interested in avoiding having to replace your dental crowns often, then I would advise you to get a bite guard.

I also suggest to all my patients who have dental crowns that they need to brush their teeth even more often than usual. Dental crowns don't decompose. But what will decay is the base that it covers. If your teeth go unbrushed, remnant food molecules will attach themselves to any gap they can locate.

You're lucky if the cement used under your crown is strong. But probably, sooner or later it will waste away. In particular, this is true if you drink a lot of soda or alcoholic beverages.

When this bonding agent is no longer there, food particles get jammed in the hole. Then microbes come and start to eat the food. When they've eaten their fill, the microbes will begin to make plaque. Then they will come across the remnant portion of your tooth root and make that their focus. When they're through, you'll probably need more than a dental crown. You might need to have a root extraction. Or, an implant might be an option.

It's better for you, by many standards, if you maintain clean teeth. What does it take to use that toothbrush–60 seconds? And, brushing your teeth is a whole lot easier and costs less than getting a new crown put in.