What are non-interfering teeth, and why are they any better than other teeth?
Teeth with cusps tear food efficiently when they are rooted in bone. Because upper and lower cusps must interlock (articulate) in a particular way, and because upper and lower edentulous ridges rarely align themselves directly (upper over lower), the lower (and/or upper) teeth must be set off the crest of the ridge. In other words, in order to make the upper and lower cusps fit together properly, the denture is off balance and tips. The Special, non-interfering teeth can almost always be set in the best balanced positions, because they don't have to interlock (upper to lower) in that particular way—just set them where they are best balanced over the ridges, and they work. Tipping is minimized. Because the chewing anatomy is recessed into the occlusal surface of the teeth, the upper teeth slide over the lowers smoothly while still chewing efficiently. The lower teeth are set first and arranged as if they were in contact with the surface of a large ball. The uppers can then be set to articulate with the lowers while still being balanced over the ridge. This accommodated the rocking motion of the jaw during chewing. This system just plain works so very well!
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