Cracked, Chipped, or Weak Tooth? Dental Crowns in Bryn Mawr Can Help! A dental crown, also known as a cap, is a custom-made restoration that fits over a damaged or weakened tooth. https://www.reddit.com/user/Myperiobr1/comments/1c0evjy/cracked_chipped_or_weak_tooth_dental_crowns_in/