before hard tissue is formed, where do the ameloblasts get their nutrition?
where does it come from after enamel is being laid down? what event occurs to allow this?
before enamel is formed, ameloblasts get nutrition from both (a) developing pulp; and (b) developing dental follicle.
once hard tissue is formed nutrition reaches the ameloblasts only from the developing dental follicle. The enamel organ collapses down at that regioin to form the COLLAPSED DENTAL ORGAN, bringing blood vessels closer to the amelobasts.