How effective are mouthguards in preventing grinding of the teeth?

Very effective: They do not prevent you from grinding, however; they prevent teeth from grinding against each other, which causes the damage. Hope this info helps..

Very.: A properly designed and fabricated "mouthguard" will be highly effective in preventing damage caused by grinding.

Damage: Mouthguards do not prevent you from grinding your teeth. They do prevent your tooth structure from being worn away, but only while you are wearing them.

Very: There are many types of mouthguards for grinding and clenching. Over the counter ones actually may be too thick and throw the muscles into more spasms. Dentists can make custom made, well fitting mouthguards, either upper or lower (i like the lower ones.) the guards can be made of soft plastic or hard acrylic...Depends on severity of grinding. For daytime clenching, other types are indicated.

Not very effective: Mouthguards prevent sports injuries and concussions. Nightguards prevent damage from grinding.