Images of nanoleakage expression from different groups. (A–D) The immediate groups. (a–d) The 10,000 times thermocycling aged groups. The first column is the Control. Groups on the right are treated with increasing concentrations of DMA. In the control group, nanoleakage deposition increased from 36.57% to 50.41% after thermoaging, while no obvious change could be detected for the DMA-treated groups. (IMAGE)

The University of Hong Kong

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