Miniature specimens for fracture toughness evaluation of dental resin composites

Fracture toughness (KC) is a primary quantity in assessing fracture resistance of dental resin composites used for cavity filling in restored teeth. This quantity has been evaluated using numerous test specimens including compact tension, Chevron notched rod, double-torsion and notched three-point bending specimens. Fujishima and Ferracane conducted a comparative study of these specimens using two experimental and three commercial dental composites [1]. The resulting KC varied significantly among the specimens, and furthermore it was affected by crack tip sharpness.
Source: Dental Materials - Category: Materials Science Authors: Source Type: research