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TMAFM images of crosslinked poly (HEMA-co-BisGMA) resin surfaces cured under different surface-contact covers: (a) mica, (b) cover glass, and (c) PVC plastic film. For ease of comparison, the same vertical scale was used, thus making the differences in height and contrast more apparent. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]
