Didn't show their teeth?

So what? None of the great painters of the time showed smiling teeth. Check out Bouguereau and Sir Lawrence Alma-Tadema if you will. That is just a sign of the time. This was serious people! In fact that is a practice with I most certainly recommend to Poser artists. Because when a Poser figure open the mouth they goes beyond ugly (something you hitherto had though impossible) and becomes 10x more scaring ugly and ridiculous.