earlier studies have shown that root growth is not a factor in the generation of the eruptive force and , as neither the pre-ameloblasts nor pre-odontoblasts express egf-receptors , the stimulation of cell proliferation in the root-sheath region appears to be a result and not a cause of accelerated tooth eruption , i.e . the increase in root growth may meet the need to maintain the tooth positionally during the accelerated eruptive process .
C0040452
root
C0040426
tooth