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Effects of hyaluronic acid sponge as a scaffold on odontoblastic cell line and amputated dental pulp
Author(s) -
Inuyama Yoshio,
Kitamura Chiaki,
Nishihara Tatsuji,
Morotomi Takahiko,
Nagayoshi Masato,
Tabata Yasuhiko,
Matsuo Kou,
Chen KerKong,
Terashita Masamichi
Publication year - 2010
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31497
Subject(s) - sponge , pulp (tooth) , dentin , hyaluronic acid , biocompatibility , in vivo , scaffold , chemistry , dentistry , anatomy , biomedical engineering , medicine , biology , botany , microbiology and biotechnology , organic chemistry
Abstract It is important to develop a suitable three‐dimensional scaffold for the regeneration therapy of dental pulp. In the present study, the effects of hyaluronic acid (HA) sponge on responses of the odontoblastic cell line (KN‐3 cells) in vitro , as well as responses of amputated dental pulp of rat molar in vivo , were examined. In vitro , KN‐3 cells adhered to the stable structure of HA sponge and that of collagen sponge. In vivo , dental pulp proliferation and vessel invasion were observed in both sponges implanted at dentin defect area above amputated dental pulp, and the cell‐rich reorganizing tissue was observed in the dentin defect when HA sponge was implanted as compared with collagen sponge. Expression levels of IL‐6 and TNF‐α in KN‐3 cells seeded in HA sponge were nearly the same with those in the cells seeded in collagen sponge, while the numbers (0.67 × 10 3 at 1 week and 0.7 × 10 3 at 3 weeks) of granulated leukocytes that invaded into HA sponge from amputated dental pulp was significantly lower than those (1.22 × 10 3 at 1 week and 1.1 × 10 3 at 3 weeks) of collagen sponge ( p < 0.01 at 1 week and p < 0.05 at 3 weeks). These results suggest that HA sponge has an appropriate structure, biocompatibility, and biodegradation for use as a scaffold for dental pulp regeneration. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 2010