The teeth grew and deeloped normally when transplanted into a mouse, said Takashi Tsuji of the Tokyo Uniersity of Science in Chiba, Japan and colleagues.

• 日本千叶东京大学科学部的教授及其同事说：“当这些牙齿被移植进实验小鼠体内后它们能够正常地生长和发育。”