Quality of CAD-CAM inlays placed on aged resin-based composite restorations used as deep margin elevation: a laboratory study.

ABSTRACT:

Objectives

To assess the impact of the age of resin-based composite (RBC) restorations used for deep margin elevation (DME) on the marginal quality and fracture resistance of inlays.

Materials and methods

Permanent human molars with direct RBC restorations, involving the mesial, occlusal, and distal surface (MOD), were allocated to four groups (each n = 12). Half of the teeth underwent thermomechanical loading including 240,000 occlusal load cycles and 534 thermal cycles (TML, 5 °C/55 °C; 49 N, 1.7 Hz). With RBC left in one proximal box as DME, all teeth received MOD inlays, made from lithium disilicate (LDS) or a polymer-infiltrated ceramic network material (PICN). The restored teeth underwent TML including 1.2 million occlusal cyclic loadings and 2673 thermal cycles. The m

SUBMITTER: Theisen CER 

PROVIDER: S-EPMC10264514 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature