SYNOPSIS
Various studies on regeneration have been performed in the regenerative dental field, but very few results have actually been clinically applied, and many new ideas have already been disregarded. In the Japanese regenerative dental field, some original ideas were favorably evaluated, but many were a reworking of studies performed in other countries, and the contents were mostly combinations or slight modifications of preceding studies. It may be time to return to the starting point and reconsider the study objective. To overcome this situation, studies based on original ideas not performed in other countries may be initially necessary to promote regenerative dental research in Japan.

Key words: ES cells, iPS, back yard cells, ovary, signal