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Figure 1. Mouse incisor pH. (A) Normal incisor stained with pH indicator showing a near-neutral pH during the secretory stage (S), that becomes acidic during the transition stage (T) and modulates between neutral and acidic pH during the maturation stage (M) (2 yellow bands and 2 light green bands [neutral bands designated with *]). (B) CF incisor stained with pH indicator shows a neutral secretory-stage pH and acidic transitional stage, while the maturation-stage zone appeared to be yellow, indicating a sustained lower pH. (C) Higher magnification of the CF incisor maturation-stage enamel showed multiple fine pigmented and unpigmented horizontal strips decorating the surface.
