Via Pro Hockey Talk's James O'Brien, we're starting to see this on a regular basis, and this time it's Vancouver Canucks forward Daniel Sedin who takes a high stick and offers evidence to the referee in toothy form:

I know that mouthguards (or "mouthgards," depending on how one spells the word [see also: doughnut vs. donut]) only provide limited protection--to the point that players who are high-sticked or take pucks to the mouth with sufficient force occasionally reveal a mouthguards full of broken real and/or fake teeth--but some protection is better than none.