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Figure 2. SEM micrographs showing: (A) type 4 etch pattern, (B) type 5 etch pattern, (C) type 3 etch pattern, and (D) type 1 etch pattern, or "ideal" etch. Each bar represents 60 µm.

J DENT RES, Vol. 87, No. 6, 532-536 (2008)
DOI: 10.1177/154405910808700607

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