What is the difference between a nightguard I can buy online and one made by my dentist?

Many people instantly reject the idea of going to bed each night with a foreign object in their mouth. This feeling is amplified by using a poorly fitted over the counter mouthguard that is bulky and uncomfortable. It takes some time not only getting used to wearing a nightguard, but finding one that fits well. While there are hundreds of over the counter mouthguard options, none compare to a nightguard that is custom-made by a trusted dentist and a reputable dental lab.