There are three kinds of mouth guards. Dr. Gill, DDS can help you make the right choice. Most importantly, the mouth guard needs to be resilient, comfortable, and tear-resistant. It should not resist breathing or speech. Here are the three types of mouth guards: Custom-made mouth guards are designed specifically for the person who wears them. They are made in a dentist’s office or a dental laboratory. Your dentist will make an impression on your teeth and then make a mouth guard from their model of them. Because they are custom fit, they will be the most comfortable and offer the best protection. These are the most expensive kind of mouth guard. Boil and bite mouth guards come pre-formed and can be altered. The mouth guard is boiled in water to make it soft and then it is bitten into by the person who is going to use it, to make a custom fit. For best results, follow the directions carefully. These can be purchased in many sporting goods stores. While these aren’t quite as good as custom-made mouth guards, they are better than stock mouth guards. Standard mouth guards come pre-formed and equipped to wear. They do not fit very well and can feel bulky in the mouth. These are the least expensive option.