I started freediving in 2006 and since 2007 I have experienced some problems with my teeth. In 4 different occasions I damaged teeth while eating; last one was broken completely and had to be removed. My dentist asked me if I put pressure on my teeth as some people do in their sleep. This I do not do but I started thinking and I think that in occassion, while freediving, i put pressure on my teeth to release the tension from contractions. I wonder if this has been experienced by other freedivers and whether this pressure on teeth while freediving is indeed associated with teeth problems.