Performance of collagen sponge as a 3-D scaffold for tooth-tissue engineering

Biomaterials
Yoshinori SumitaMinoru Ueda

Abstract

Tooth structure can be regenerated by seeding dissociated tooth cells onto polyglycolic acid fiber mesh, although the success rate of tooth production is low. The present study was designed to compare the performance of collagen sponge with polyglycolic acid fiber mesh as a 3-D scaffold for tooth-tissue engineering. Porcine third molar teeth at the early stage of crown formation were enzymatically dissociated into single cells, and the heterogeneous cells were seeded onto collagen sponge or the polyglycolic acid fiber mesh scaffolds. Scaffolds were then cultured to evaluate cell adhesion and ALP activity in vitro. An in vivo analysis was performed by implanting the constructs into the omentum of immunocompromised rats and evaluating tooth production up to 25 weeks. After 24h, there were a significantly higher number of cells attached to the collagen sponge scaffold than the polyglycolic acid fiber mesh scaffold. Similarly, the ALP activity was significantly higher for the collagen sponge scaffold was than the polyglycolic acid fiber mesh scaffold after 7 days of culture. The area of calcified tissue formed in the collagen sponge scaffold was also larger than in the polyglycolic acid fiber mesh scaffold. The results from in vivo...Continue Reading

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