If you’re the athletic type — or if your child plays sports — you probably know that wearing a mouthguard is a proven method of preventing dental injuries. Now, evidence is mounting that this essential piece of protective gear can also help prevent concussions — and...

Chewing bamboo for 12 hours a day requires sound teeth. So when 23-year-old giant panda Bai Yun chipped her tooth, officials at the San Diego zoo sprang into action. The bear’s broken lower canine was x-rayed so veterinarians could assess the extent of the damage....