Effect of a temporary sealing material on the bond strength of CAD/CAM inlay restorations with resin-coating technique

Abstract

This study aimed to assess the effects of a temporary sealing material and cleaning method of resin-coated dentin on the bond strength of computer-aided design/computer-aided manufacturing (CAD/CAM) inlay restorations. Resin-coated dentin surfaces were unsealed or temporarily sealed for 1 h or 1 week. For the temporarily sealed group, a hydraulic temporary sealing material was removed and further divided into four groups: without cleaning, cleaned with a rotational brush, a universal cleaner or an air-polishing device. Some specimens were investigated with energy dispersive X-ray spectroscopy and the others were used for microtensile bond strength (MTBS) test. A sealing material could not be removed with a rotational brush, which resulted in pretest failures in all specimens after 1 h and which resulted in low MTBS after 1 week. An air-polishing device can clean resin-coated dentin temporarily sealed with a hydraulic temporary sealing material and resulted in the similar MTBS as in the unsealed group.

Influence of the resin‐coating technique on the bonding performance of self‐adhesive resin cements in single‐visit computer‐aided design/computer‐aided manufacturing resin restorations

“…This method was established in previous papers. 19,20 The most frequently observed failure type of the noncoated group was adhesive failure at the junction of the resin cement and dentin (Type e) in both cements regardless of the curing mode. Therefore, a weak bond between the self-adhesive resin cement and dentin was speculated.…”

“…Representative surfaces show the tendency of the fracture analysis. This method was established in previous papers 19,20 …”