Are dental implants fragile?

Here is the deal, when i was younger I use to do a lot of drugs. Now that i am older my teeth are fragile and just last night my front tooth cracked from the inside. It feels like my teeth are going to break off.

I am so scared that my tooth will just break in half. I have been reading on dental implants and how they get screwed in into your gums and into the root of the old tooth. Would this procedure benefit me or would i still have to be worried about the implants falling off or getting knocked out?

For a while now i have picked up the hobby of boxing, I wear a mouth guard when i am boxing. What other procedures could you recommend for me? Or am i just out of luck? Please help!!