Changes in the mechanical properties and surface texture of compomer immersed in various media

Statement of problem. Limited information is available about the mechanical behavior of compomer under intraoral conditions. Purpose. This in vitro study evaluated changes in the mechanical properties and surface texture of com pomer and other materials, used in similar clin ical circumstances, when immersed in various media. Material and methods. Hardness measurement for 5 tested materials and 4 imm ersion media was obtained with a Vickers hardness testing machine. Compress ive strength was measured using an Autograph at a crosshead speed of 0.75 m m/min. All readings were taken for up to a 60-day period. Al electron probe microanalyzer was used to give an SEM image. Results. The average compressive strength and Vickers surface hardness show ed a significant difference between materials. Results showed an overall in crease in the solubility of specimens immersed ill low pn soft drinks. Conclusion. There was a difference in the mechanical properties and surface texture of the materials tested in this study when thc! were immersed in v arious media.