Development of the basic technology for tooth regenerative therapy system

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In current research on whole-tooth regenerative therapy, a basic strategy is being pursued in which a bioengineered tooth germ is induced to develop into a fully functional tooth. We developed a three-dimensional organ-germ culture method for the reconstitution a bioengineered organ germ. We successfully demonstrated that our bioengineered tooth germ could develop a fully functioning tooth, which has hardness for masticatory potential, the functional responsibility against a mechanical stress, and perceptive potentials of neural fibers. Furthermore, we demonstrated a further development in this regard in which a bioengineered tooth unit comprising mature tooth, periodontal ligament and alveolar bone, was successfully transplanted into a properly-sized bony hole in the alveolar bone through bone integration by recipient bone remodeling in a murine transplantation model system. These results showed that the bioengineered tooth germ and mature tooth unit could regenerate a fully functioning tooth and an organ replacement regenerative therapy might be feasible.