Effect of Preirradiation Fluoride Treatment on the Physical Properties of Dentin.

Objective: To determine the effects of preirradiation fluoride treatments on the Knoop hardness of dentin.

Materials And Methods: Human posterior teeth mounted into acrylic resin molds were polished with silicon carbide (SiC) abrasives and 3-micron diamond paste. The Knoop hardness of dentin was measured with a Leco hardness instrument.