Bacterial Penetration of Human Dentin in vitro

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Abstract
The ability of bacteria to penetrate acid-etched and unetched human dentin was examined in vitro using a split chamber. Results indicate that bacteria can grow through or be filtered by pressure through acid-etched dentin. Unetched dentin, while permitting fluid filtration, restricts bacterial penetration. Penetration of dentin tubules by bacteria reduces the rate of fluid filtration across dentin.