Contrary to very popular belief, while George Washington had false teeth and eventually dentures, none of his teeth were made of wood. His dentures were made of lead and filled with “teeth” comprised of human teeth (including those purchased from slaves and some of his own teeth), ivory and bone that were retained by gold wire. His first tooth was extracted when he was 24 and by the time of his inauguration he had only tooth in his gums. Apparently he was self conscious about his dental problems and that made him less willing to speak.
Not exactly something that makes you want to smile.
Photo from Mount Vernon