Erosion behaviors of human tooth enamel at different depth

In vitro erosion behaviors of human tooth enamel at different depth have been investigated in citric acid solution with pH 3.20. Erosion time of 3 min was used. The microtribological behaviors of eroded surfaces were also examined using nanoscratch technique. Results showed that erosion properties of enamel were closely associated with its location. Erosive substance loss increased from the outer to the interior enamel. Additionally, compared with the outer enamel, the influence of erosion on subsequent friction and wear behaviors appeared more significant in the interior enamel. Understanding of dental erosion would be useful for improving clinical management of toothwear.