These synthetic heads don't need to be anywhere near the Uncanny Valley to be terrifying. Our friends at Oobject have assembled 12 of the creepiest prosthetic mouths in dentistry.
Also check out these creepy medical mannequins, 12 videos of automata, and a dozen crash test dummies.
Various views of a terminator like vintage dental manikin
Rubber head dental manikin
Showa University third generation dental robot
Dental Training Chair Mount
Dental Mankin which appears to be shouting
Translucent Dental Mankin
Dental Phantom with Steel Gums and Teeth c.1930
College Dental Simulation Lab
Pain Girl robotic dental and medical simulator
Rubber Dental Mannequin with Human Jaw & Dentures
Phantom Head, antique dental school trainer
Dental Manikin—Lightweight and Compact Economy Type Simulator