I believe the artist is having fun with us this morning. The drawing on the front of the grey T shirt changes three times. Very Funny Greg, Very Funny.
Just for the record. The common myth that GW had wooden teeth is not correct. His plates were carved from ivory and teeth from humans, donkeys and other sources were fitted to the plates, which had springs to keep them together. Check the Museum of Dentistry in Baltimore, Maryland. They have one of the plates.
That would not be funny.