Wettability of some packable resin-based composites. An in vitro study

The purpose of this research was to measure the contact angles of some packable resin-based composites in order to determine their wettability related to the surface energy. Materials were manipulated according to the manufacturer's instructions and were inserted in a circular metallic matrix and photo cured for 40 seconds on both sides. The specimens were removed and finished with silicon carbide metallurgical finishing paper (800 gifts). Half of each specimen was covered by a layer of Bis-GMA and photo cured for 20 seconds. The specimens were then submitted to measurements in a contact angle goniometer with two different liquids and polarities in three points. The materials without Bis-GMA covering layer showed statistically significant differences related to contact angles and among the materials and liquids (p<0/05).