Pulpal Protection by a Cavity Liner Applied As a Thin Film Beneath Deep Silicate Restorations

Abstract
Before deep silicate restorations were placed in 40 contralateral pairs of permanent premolars, a thin film of a polystyrene liner was applied in one randomly chosen cavity of each pair. The observation periods were one and four weeks. In all but one of the 40 teeth, the liner gave satisfactory protection.

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