Another cause of dental trauma most frequently occurs during sports activities; the damages that result to the teeth, gums and jawbone often require a long rehabilitation and large financial burden. ADA and Sports Medicine Australia recommends that every sports participant of any age or sex wear a dentist-fitted, customised mouthguard, as boil-and-bite mouthguard versions provide little to no protection and inhibit dialogue. Sports that require the use of mouth guards even for practice sessions or training include AFL, boxing, rugby league, rugby union, basketball, soccer, netball, hockey, cricket, water polo, lacrosse, softball, skateboarding, trampoline, cricket (wicket keeping or batting without a helmet), water skiing, and snow ski racing. Mouth guards should be refitted and reviewed annually by a dentist.