Figure 2
From: Qualitative surface roughness of lithium disilicate endo-crown for pulpotomized primary molars

Zirconia crown: before mechanical load 3-D topographic change in crown surface, surface plot of 3-dimensional geometry of the worn surfaces and histogram showing surface roughness (A–D). After mechanical load 3-D topographic change in crown surface, surface plot of 3-dimensional geometry of the worn surfaces and histogram showing surface roughness (E–H).