leakage of minute amounts of fluids, debris, and microorganisms through the microscopic space between a dental restoration or its cement and the adjacent surface of the cavity preparation; it may progress through the dentin into the pulp.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Passage of microorganisms and saliva-borne constituents through the interstices between the sides of a cavity preparation and a restoration, due to incomplete sealing of the interface.
Medical Dictionary for the Dental Professions © Farlex 2012