Dental cavities are the worst. They are nasty looking, painful, and are basically a burn on the surface if your teeth, a burn caused by the corrosive activities of bacteria in the mouth. To remedy these surface problems and infestations, dental fillings are used. But what if a tooth is too far gone? In this case, a special filling called an inlay, which is essentially a small piece of a dental crown, is used. Inlays are significantly more expensive than dental fillings, so it is good to know if you will need to drop any cash on them, especially if you are running on a tight budget. Here are some questions to ask yourself that will help you determine what you will need.