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Figure 2. Plots of the hardness (a) and fracture toughness (b) of rat incisor enamel in 4 experimental groups, namely, wet untreated, dry untreated, dry treated, and wet treated, collected in the mid-sagittal ( ) and transverse ( ) planes. Error bars represent standard deviation values based on data obtained from 3 incisors per compositional group.
J DENT RES, Vol. 87, No. 7,
645-649 (2008)
DOI: 10.1177/154405910808700711
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