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Surface treatment of feldspathic porcelain: scanning electron microscopy analysis

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Table 1.  Surface treatment parameters in different study  groups Group Sandblasting  pressure (bar) Sandblasting time (seconds) HF etching time (seconds) G1 2 5  -G2 2 10  -G3 2 15  -G4 3 5  -G5 3 10  -G6 3 15  -G7 4 5  -G8 4 10  -G9 4 15  -G10 - -  -G11*
Fig. 1.  Materials and equipment used. (A) feldspathic porcelain disc measuring 6 x 2 mm, (B) microsandblaster, (C)  buffered 9.5% HF gel, (D) sputter-coater machine.
Fig. 2.  SEM analysis of the feldspathic porcelain surface topography following sandblasting with 50 μm alumina  particles from a 5 mm distance at 2 bar pressure for 5 s (A), 10 s (B) and 15 s (C)
Fig. 5.  SEM analysis of the feldspathic  porcelain surface topography following  acid etching with 9.5% HF acid for  120 s

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