statement of problem: resin composites are a common type of tooth coloured restorative materials. these materials are brittle and their major shortcomings are sensitivity to flaws and defects, low tensile strength, and susceptibility to catastrophic failure.the role of home bleaching agents on the fracture toughness of resin composites using four-point bending test is scanty. objectives: to com...

Abstract Snowboarding wrist protectors are typically designed to limit impact forces and prevent hyperextension. The standard for snowboarding (ISO 20320:2020) includes a test measuring their bending stiffness, when fitted surrogate. This serves as simple means of assessing the ability Wrist protector stiffness measurements have been shown be influenced by surrogate design, strapping condition,...