Mechanical evaluation of five flowable resin composites by the dynamic micro-indentation method

Dynamic ultra-micro-hardness testing system used in this study. (a) Schematic image of the geometry of the Berkovich indenter tip. Tip height (L) is defined as L = (1/3) (L₁ + L₂ + L₃). The photograph is the indented surface of the sample after testing. (b) Schematic illustration of the micro-indentation load versus penetration depth curve obtained from the testing.