Tooth Strip

Barney gives us an accurate depiction of a Tyrannosaurus Rex's dentition.

It isn't always practical in animation to draw each individual tooth in a character's mouth and in fact, can run the risk of careening down the Uncanny Valley. Because of this, a popular way of simplifying teeth is to draw them as a solid toothy mass stretching from one side of the mouth to the other.

Examples of Tooth Strip include:

Anime and Manga

• Characters drawn in manga usually have these. And when they do, it's usually the creepy/funny-looking kind.
  • Notably averted in Beck in that every character has all their teeth visibly shown.

Literature

• The Nonmen and the Sranc in Second Apocalypse are like this.

Live Action TV

• This is one of the signature traits of the eponymous purple dinosaur, Barney.

Newspaper Comics

• Parodied in FoxTrot. Roger tries a whitening toothpaste which erases all the lines between his teeth.

Video Games

• All of the Sonic the Hedgehog characters are shown this way, though quite a few of them have Cute Little Fangs as well.

Web Comics

• Humans in Gunnerkrigg Court are usually depicted this way. Except Zimmy with her "many, many fine sharp fangs".

Western Animation

• My Little Pony Friendship Is Magic
• Pretty much anyone in a Seth MacFarlane series. Especially Mr. Bottomtooth of Family Guy, a pretentious rich guy with a single bottom tooth. His son shares this trait. Strangely, the creepy pedophile also has tooth strips when he laughs or chuckles, despite not having most of his teeth...
• Averted in South Park—even though the characters are crudely animated, they still have lines to mark the division of teeth.
• We see a weird variation in Invader Zim: the Irkens all have their teeth joined together in an undulating, zipper-like pattern. The humans usually have their teeth drawn separately.
• Many other characters in Western animation use tooth strips for the same reason as anime/manga. Drawing them with individually divided teeth looked bad and would be difficult to draw. It isn't so much lazy animators, but what looked decent and was reasonable to animate.
• Pixar is infamously known for their tendency to give most of their nonhuman characters this kind of teeth, whether they are either |toys, insects, monsters, fish, or vehicles.
• Played straight with many animated Disney characters. Aversions include Beggar Jafar's crooked dentures and The Coachman's Nightmare Face.
• This is standard in 3D modelling: the artist models a tooth strip and maps the color and normals to make it look like a row of discrete teeth.
• Bubs from Homestar Runner.
• The Car Crusher at the end of The Brave Little Toaster apparantly has a large guillotine-like blade used to crush cars into tiny cubes that's shaped like a wall of teeth.
• Recess uses this sometimes.
• 101 Dalmatians: The Series, Depending on the Artist.