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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2017 Oct 2;77:557–565. doi: 10.1016/j.jmbbm.2017.10.001

Figure 8.

Figure 8

Images from the DEJ bonded interface specimens after fatigue failure. The figures are obtained from the tensile side of the specimens. a) Tensile exterior surface of the twin interface. Evident are the enamel (E), resin adhesive (A) and resin composite (C). Note the large crack opening displacement. b) crack extending within the enamel towards the DEJ in a specimen that underwent fatigue failure. Shown is the twin interface that did not fail but exhibits the evidence of cyclic loading related damage. c) a more highly magnified view of the image in (b). Note the cracks evident that extend from the DEJ into the enamel along the enamel tufts.