When decay spreads into the dentin, the process accelerates, most likely because the very low pH that can arise in this semiclosed environment denatures the collagen scaffold that holds the hydroxyapatite salts in place and rapidly solubilizes them.
(decay; spreads; into the dentin) (the collagen scaffold; rapidly solubilizes; them) (the process; accelerates; T:When decay spreads into the dentin) (the very low pH; can arise; L:in this semiclosed environment) (the collagen scaffold; holds; the hydroxyapatite salts)
decay the collagen scaffold the process the very low pH the collagen scaffold
spreads rapidly solubilizes accelerates can arise holds
into the dentin
them
T:When decay spreads into the dentin
L:in this semiclosed environment
the hydroxyapatite salts