Skip to main content
. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2010 Jul 16;3(8):623–629. doi: 10.1016/j.jmbbm.2010.07.004

Figure 6.

Figure 6

Higher magnification of Fig 5, shows the fracture origin at the tip of the zirconia core frame in form of a pore cluster within the veneering ceramic at the interface core-veneer (small arrows). The primary crack front moves from the tip downwards along the core (very fine hackle and arrest lines are visible on the core surface), whereas a secondary crack front moves with a twist direction towards the buccal side within the veneering ceramic as seen by the presence of hackle and wake hackle. The large arrows indicate the dcp.