The role of bone morphogenetic protein in the tooth culture.
- Author:
Il Hyuk CHUNG
1
;
Jong Hoon CHUNG
;
Pill Hoon CHOUNG
Author Information
1. Department of Oral and Maxillofacial Surgery, Craniofacial Tissue Engineering Laboratory of BK21 Human Life Science and the Intellectual Biointerface Engineering Center, College of Dentistry, Seoul National University, Korea. choungph@snu.ac.kr
- Publication Type:In Vitro ; Original Article
- Keywords:
BMP4;
Organ culture;
Tooth germ transplantation;
Diastema;
Mandible primordia
- MeSH:
Adult;
Ameloblasts;
Animals;
Bone Morphogenetic Proteins*;
Crowns;
Dental Enamel;
Dentin;
Diastema;
Ectoderm;
Humans;
Kidney;
Mandible;
Mesoderm;
Mice;
Molar;
Morphogenesis;
Odontoblasts;
Organ Culture Techniques;
Tooth Germ;
Tooth*
- From:Journal of the Korean Association of Oral and Maxillofacial Surgeons
2004;30(5):438-443
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Objectives : The proper development of the facial structures relies upon a sequence of tightly regulated signaling interactions between the ectoderm and mesoderm involving the participation of several families of signaling molecules. Among these, bone morphogenetic proteins (BMPs) have been suggested to be a key signal that regulates the development of the mandible and the initiation and morphogenesis of the teeth. The aim of this study was to examine the artificial development of the mandibular structures and to examine the role of BMPs on tooth morphogenesis and differentiation using an organ culture system. Materials and Methods : The tooth germs from Ed 11.5, 13.5 mice were dissected, and transplanted into the diastema of the mandible primordia. The mandibles containing the transplanted tooth germs were cultured in vitro. During this period, beads soaked with BMP4 were implanted around the transplanted tooth germs. In addition, a diastema block containing the transplanted tooth germ was dissected, then transferred to an adult mouse kidney. After the organ culture, the developing mandibular explant was removed from the kidney and prepared for the tissue specimens. Odontogeneis of the transplanted tooth germs was examined after Hematoxylin-eosin, Masson-trichrome staining. Results : Proliferation and differentiation of the tooth germs cultured in the diastema was observed. In the BMP4-treated tooth germs, the formation of the first and second molars was noted. The crown of the developing tooth showed the formation of a mature cusp with the deposition of enamel and dentin matrix. In conclusion, it was confirmed that BMP4 is involved in the formation of a dental crown and the differentiation of ameloblasts and odontoblasts of the molar tooth during the development of the transplanted tooth germs.
