PENETRATION EFFICACY OF A CARIES INFILTRANT RESIN USING DIFFERENT ETCHING AND APPLICATION TIMES

Abstract

This in vitro study was carried out to evaluate the effect of different etching time and different application time on the penetration efficacy of the resin infiltrant material (DMG Icon). In this study a total of ninety human incisors were selected after being thoroughly examined with a magnifying lens to discard any cracks or structural defects. Artificial carious lesions were created in the selected teeth after the preparation of a labial window using nail varnish by immersing the teeth in a demineralizing solution for 4 days which was replenished daily. Teeth were divided into three equal groups according to etching time in which the first group the etching time was 30 seconds, in the second group the etching time was 60 seconds and in the third group the etching was for 120 seconds. Each group was furtherly divided into three subgroups according to the application time of the infiltrant resin. In the first subgroup the application time was 4 minutes followed by light curing, in the second subgroup the application time was 3 minutes then light curing then 1 minute application followed by light curing. In the third