What do the temporary teeth of a caecilian fetus do inside the mother’s oviduct?

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Zoom in on the serpentine locomotion of the limbless, amphibious caecilian over soil — Gymnophiona Caecilian moving over soil.

In viviparous caecilians, the fetus emerges from the egg membrane once its initial yolk supply is depleted. To obtain nourishment while inside the mother’s oviduct, the fetus uses specialized deciduous teeth adapted for scraping. These teeth allow the developing young to feed on secretions and epithelial tissues from the lining of the oviduct.1