The idea that tooth decay (蛀牙) can be deadly may seem incredible at first, but recently some ideas suggest that 36. goes on inside your mouth may have a far-reaching influence 37. your whole body health. One of the most 38. (common) believed connections is that between poor oral (口腔的) health and heart disease. There are a couple of theories 39. (analyse) why there’s a link between heart disease and tooth decay. Some suggest that oral bacteria can get into the bloodstream. And then the blood flow in the heart 40. (block), which can lead to a heart attack. Some think arterial inflammation (动脉炎症) 41. (cause) by oral germs limits blood flow, eventually causing a heart attack. There’s still no 42._ (science) evidence which can confirm that poor oral health causes heart disease, but it does seem 43. (involve) a risk, lending support to the 44. (possible) that the oral health plays a much larger role in human health and wellness 45. we’ve suspected until now.