I have heard stories about people having their teeth knocked out when they fall from the bike. My boyfriend goes for long journeys on the bike. He wears a helmet. But, is that sufficient? I have read in a blog ( http://www.shorttermbraces.com/blog/general-category/mouth-guards-and-splints/ ) that wearing mouthguards can reduce the intensity of damage that can occur to your teeth. The blog says that there are three types of mouthguards. I wanted to purchase one for him. I am confused on which mouthguard to select for him. Is there anybody over here who uses mouthguards while riding bikes? If so, please give me some ideas and suggestions.