What types of glue (or cement are used to keep Crowns on teeth and what is the strongest?

I have been having crown problems for a whle and i was wondering is there a type of glue that hey dont use on like younger people getting crowns? Because I got mine (first time) Back in Noveber of 2006 and it broke off in febuary then I got it again and it bre off May again!! Is it because im yung and still growing? Or am i just cursed.