The corrosion products of proprietary and generic orthodontic fixed lingual retainers and their in-vitro cytotoxicity.

Objective: To assess the corrosion products and cytotoxicity of generic and proprietary fixed lingual retainers (FLRs).

Materials And Methods: Seven FLRs were investigated. Wires were submersed in solution for 34 days, at 37°C, under constant agitation.

The in vitro wear behavior of experimental resin-based composites derived from a commercial formulation.

Objective: To investigate the short- and long-term in vitro wear resistance of experimental resin-based composites (RBCs) derived from a commercial formulation.

Methods: Six experimental RBCs were manufactured by manipulating the monomeric resin composition and the filler characteristics of Grandio (Voco GmbH, Cuxhaven, Germany). The Oregon Health Sciences University (OHSU) oral wear simulator was used in the presence of a food-like slurry to simulate three-body abrasion and attrition wear for 50,000, 150,000 and 300,000 cycles.