Definition: an imaginary surface that is related anatomically to the cranium and that theoretically touches the incisal edges of the incisors and the tips of the occluding surfaces of the posterior teeth; it is not a plane in the true sense of the word but represents the mean of the curvature of the surface.
Synonym(s): bite plane
See Also: curve of occlusion
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Examples: glitazone, GI cocktail, etc.