liner

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liner

 [līn´er]
material applied to the inside of the walls of a cavity or container for protection or insulation.
cavity liner an agent used to line a tooth cavity for protection of the pulp from irritation and for neutralization of the free acids of zinc phosphate cements.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

li·ner

(lī'nĕr),
A layer of protective material.
Farlex Partner Medical Dictionary © Farlex 2012

lin·er

(lī'nĕr)
A layer of protective material.
Synonym(s): insulating base, protective base.
Medical Dictionary for the Dental Professions © Farlex 2012