Abstract
The purpose of this investigation was to examine the effect on the sealant penetration of the lapse of time from the application of sealant until exposure to visible light. Buccal and lingual surfaces of the crowns of human premolars were used. Following enamel conditioning, a light-polymerized sealant was applied and 4 different periods of time were allowed until exposure to the light source. After sectioning, SEM photomicrographs showed statistically significantly greater tag lengths when at least 20 s time elapsed. The mean tag lengths found after 0.5 s, 5 s, 10 s and 20 s were 3.56, 4.87, 5.57 and 15.53 μm respectively. A self-polymerized sealant used as a control showed a mean tag length of 23.95 μm. The minimum tag length as a function of time lapse needed for optimal retention should be investigated in clinical trials.
Published Version
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