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hDPSCs were cultured on scaffolds for up to 6 weeks and processed for TEM. r, rough endoplasmic reticulum; a, actin filaments; g, glycogen; id, intertubular dentin; pd, peritubular dentin; dt, dentin tubule; sv, secretory vesicles; cp, cellular process. Representative results of 12 separate experiments are shown in panel A, B and C. Scale bar equals to 5 μm.
