Influence of polymerization time on properties of dual-curing cements in combination with high translucency monolithic zirconia.

Purpose: The aim of this in vitro study was to assess conversion degree (DC), micro-hardness (MH) and bond strength of two dual-curing resin cements employed under translucent monolithic zirconia irradiated with different time protocols.

Methods: 84 square shaped samples of 1mm thickness were prepared from high translucency zirconia blocks and divided into two groups (n=24) according to the cement employed: (1) Rely-X Ultimate; (2) Panavia SA. Each group was further divided into 3 subgroups (n=8) according to the irradiation time: (a) no light; (b) 20s; (c) 120s.

Influence of surface coating sealer on resin composite water absorption and discoloration: An in vitro study.

Purpose: To evaluate the in vitro efficacy of surface coating sealer (SCS) in reducing the amount of water absorption and stain formation in resin composites.

Methods: To evaluate the amount of water sorption, 40 stainless steel round molds (n=10 per composite) were filled with Filtek Supreme XTE; Venus Diamond; Clearfil Majesty ES-2; Gradia Direct Anterior. Groups were further divided into two subgroups (n=5) according to the presence/absence of SCS (Easy Glaze).

Influence of operator experience on non-carious cervical lesion restorations: Clinical evaluation with different adhesive systems.

Purpose: To evaluate the influence of operator experience on adhesive technique and to assess the clinical performances of two different adhesive systems.

Methods: 90 cervical lesions in 42 subjects, with a mean age of 52.4 years (range between 32-63) were selected.