Jack Hughes became famous for scoring the Olympic gold-medal-winning goal in overtime for the United States against Canada. His gap-toothed grin was just as famous afer getting his front teeth knocked out earlier in the game. It underscored the importance of hockey dentists and the work they do. The special responsibilities of dentists can include on-site root canals, sutures and more. Dentists are key in a sport where sticks, pucks and everything else can cause mouth damage that players are eager to shake off so they can get back on the ice. Hughes has already had his teeth fixed.