Effect of conditioning the enamel surface of primary teeth with citric acid: a SEM study.

The present SEM study revealed the effect of 50 percent citric acid on the primary tooth enamel subsequent to mechanical pretreatment. The enamel of primary teeth was conditioned with 50% citric acid for 1, 1.5, 2, 3 and 5 minutes. A uniformly etched enamel surface was obtained at 5 minutes.