The effect of the structure of epithelial root sheath on the development of tooth root

Shanghai Journal of Stomatology ›› 2014, Vol. 23 ›› Issue (2): 184-187.

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The effect of the structure of epithelial root sheath on the development of tooth root

LIU Xiao-hui¹, YUAN Fang², QIU Yi-nong¹, LI Xuan¹

1.Department of Stomatology, the General Hospital of Lanzhou Command. Lanzhou 730050;
2. Department of Clinical Laboratory, the First Hospital of PLA. Lanzhou 730030, Gansu Province, China

Received:2013-05-27 Online:2014-04-20 Published:2014-05-21

Abstract

Abstract: PURPOSE: To investigate the effect of the structure of epithelial root sheath (ERS) on the development of tooth root. METHODS: The first molars of postnatal (PN) 8 d SD rats were chosen to harvest the apical tissue. The tissues were digested by the mixture of type I collagenase and dispase. One part of the cell suspension was pelleted by centrifugalization. The other part of the cell suspension was digested by trypsin and then pelleted. The cell pellets were cultured in vitro for 4 hours and then implanted into renal capsule of the mother rats. RESULTS: It was found that ERS was dissociated into fragments by the mixture of type I collagenase and dispase or single cells by trypsin. The pellets containing fragments of ERS generated tooth root-like structure and periodontal tissues. The pellets containing single cells of ERS formed tubular and bone-like dentin. CONCLUSIONS: The bilayered epithelial structure of ERS has important role in the development of tooth root.

Key words: Epithelial root sheath, Tooth root, Tooth development

CLC Number:

R780.2

LIU Xiao-hui, YUAN Fang, QIU Yi-nong, LI Xuan. The effect of the structure of epithelial root sheath on the development of tooth root[J]. Shanghai Journal of Stomatology, 2014, 23(2): 184-187.

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The effect of the structure of epithelial root sheath on the development of tooth root

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