The Fonz has his mouth wired shut and he tries to eat food through a blender?

What's the name of this episode?

It sounds like it might be "It Only Hurts When I Smile," in which Fonzie visits a
dentist after coming down with an awful toothache. Could that be it?

His mouth isn't wired shut in that episode. To be honest, I don't recall that happening at all.

Then he never drank food from a blender....either that and I don't remember any of the episodes at all...they are too many of them.

there is that one with the dentist but his mouth was never wired

It sounds like it might be "It Only Hurts When I Smile," in which Fonzie visits a
dentist after coming down with an awful toothache. Could that be it?
yup, it was episode #177 in the 8th season, the Fonz had a toothache but refused to see a dentist so he had Al make him a shake that was hamburger and fries. Al told him that it came with a salad in a shake form as well :lol:

Right, but his mouth wasn't wired shut.

Oh, thank you. Thank you.

:)