On the Position Changes during Development of Human Permanent Tooth Germs in the Fetal Life.

As stated in the last paper (1965), many authors have reported about the initial development of permanent tooth germs but there are very few studies concerning the position changes during the whole development of permanent tooth germs. Therefore, following the last report about the ontogenetic origin of permanent tooth germs, the author wishes to describe in details the position changes during development of permanent tooth germs in the fetal life, paying special attention to the positional relationships of the permanent germs to each other as well as between the permanent germ and its deciduous predecessor. Materials and method are the same as written in previous studies. Refer to the materials listed in the papers published in 1956 and 1962.