RESUMO
Objective:To observe the effects of dentin proseeded with BMSCs or PDLCs incorporated with PDLCs sheets and calci-nated ceramic bovine bone(CBB)in the reconstruction of periodontal tissue.Methods:Root dentin slices were prepared and pre-seeded with BMSCs or PDLCs from beagle dog.After cultivated in osteoinduction medium(OST groups)orα-modified eagle's medi-um(MEM groups)for 3 weeks,the dentin slices observed by scanning electron microscope (SEM).Then the slices were wrapped successively with PDLCs sheets and CBB as new constructs(BMSCs or PDLCs/dentin/PDLCs sheets/CBB).The new constructs were transplanted into nude mice subcutaneously,8 week after transplantation,samples were havested and examined by HE staining.Re-sults:Enough cells and extracellular matrices were detected on the dentin slices by SEM in vitro.A little new immature cementum-like tissue without periodontal-like tissue on the surface of the new construcs was observed in OST groups.By contrast,in MEM groups,periodontal-like without immature cementum-like tissue formation was observed.Conclusion:Dentin proseeded with BMSCs or PDLCs incorporated with PDLCs sheets and CBB cultured by MEM can promote periodontal-like tissue regeneration.Cultured with osteooinduction medium can promote cementum-like tissue regeneration.