These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Special Effects Failure: every time we see a close-up of a patient's mouth being tortured, it's an obvious model with rubber gums and tongue, and plastic teeth. Whenever a dental drill touches a tooth, that tooth flakes off, unlike real (hard) enamel and like (soft) plastic. In addition, whenever a cavity is shown, it's always a black "crater" on the surface of the tooth. This is completely unlike a real cavity, which starts as a thin channel (invisible to the naked eye) connecting the surface to the inside of the tooth, where the decay develops and eventually shows in transparence through the enamel. And whenever some teeth are removed from the fake mouth, subsequent shots of the real mouth of the victim show the teeth still in, either painted black in an attempt to hide them, or not even disguised at all.