intercuspation

[ĭn′tər-kŭ-spāshən]
n.
  1. The cusp-to-fossa relationship of the upper and lower posterior teeth to one another.
  2. The interlocking or fitting together of the cusps of opposing teeth.interdigitation
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.