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A cusp of a tooth that tends to forcibly wedge food into interproximal areas, causing an impaction. Cusp points should be rounded, shortened, or reduced with a dental drill.
See also: cusp
plun·ger cusp(plŭnjĕr kŭsp)
Cusp with a postion such as to force food into interproximal areas.
n a stamp cusp, the tip of which is made to occlude in an embrasure; its shoulder has not been restored to occlude in a fossa.