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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: J Eur Ceram Soc. 2012 Aug 1;32(11):2623–2632. doi: 10.1016/j.jeurceramsoc.2012.02.020

Fig. 6.

Fig. 6

Cross sectional view of (a) graded glass-zirconia (GZ) with an external glass layer (G) and (b) homogeneous 3Y-TZP following sliding-contact fatigue at 200 N, 2 million cycles in water. Section view of (c) a commercial porcelain-veneered zirconia system (LAVA, 3M ESPE), showing that partial cone cracks have propagated through an entire 1 mm porcelain veneer layer after ~105 sliding cycles at 200 N in water. Sliding direction from left to right of micrographs.