Figure 8

MicroCT scans of U. abstrusus dental caries; all cross sectional images oriented buccolingually through depth of lesion except as noted. m1 (CMN 52078-A), occlusal view of m1 (reversed from left side) and reconstructed view of m1 with enamel in yellow and dentin in green; m1.1, worn and slightly elevated surface with no caries (as control); m1.2, small dentinal caries; m1.3, note demineralization of dentin wall extending approximately 0.1 mm and dentinal sclerosis pulpal to depth of lesion; m1.4, small carious lesion, note also loss of enamel on lingual surface due to breakage; m1.5, small carious lesion. m2 (CMN 52078-B), occlusal view of m2 and reconstructed view of m2 with enamel in yellow and dentin in blue; m2.1, small lesion on left; m2.2, carious lesion revealing demineralization of the pulpal surface, demineralization of the dentinal tracts extending to the pulp, and probably reparative (secondary) dentin formation in the pulp underlying the demineralized dentinal tracts.; m2.3, early lesion on left; m2.4, early lesion; m2.5, early lesion; m2.6, small lesion; m2.7, note areas of demineralization on the periphery of the lesion and demineralization and deeper sclerosis of dentinal tubules running towards the pulp. M2 (CMN 54380, left side), occlusal view of M2 and reconstructed view of M2 with enamel in yellow and dentin in pink; M2.1, note subsurface demineralization at depth of lesion, deeper sclerosis of dentinal tubules, and apparent constriction of distal pulp horn by reparative dentin; M2.2, slice oriented mesiodistally through depth of lesion, note subsurface demineralization in depth of this proximal surface lesion, deeper sclerosis of dentinal tubules, and mild constriction of pulp horn by reparative dentin. Note also proximal surface caries of distal surface of adjacent M1. Scale = 1.00 mm.