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. Author manuscript; available in PMC: 2009 Nov 1.
Published in final edited form as: Dent Mater. 2008 Apr 23;24(11):1477–1485. doi: 10.1016/j.dental.2008.03.007

Figure 4. Indentation size effect diagrams for enamel and a selected crown material.

Figure 4

Figure 4

a) human enamel (patient age = 23). The highlighted region indicates the load range in which microcracks (light grey) were evident at the indentation periphery and well-defined cracks (grey) were evident at the indentation corners.

b) porcelain veneer on an alumina foundation. The highlighted region indicates the load range in which well-defined cracks were evident at the indentation corners. There was no evidence of microcracking at smaller loads.