Local Irradiation of Mouse Tooth Germ Gives Insight into the Direct Effects of Irradiation on Root Development

Radiat Res. 2021 Aug 13. doi: 10.1667/RADE-20-00081.1. Online ahead of print.ABSTRACTTo elucidate the mechanism underlying the failure of root formation after irradiation, we established a method of local irradiation of the molar tooth germ and demonstrated that radiation directly affected dental root development. In the current study, to locally irradiate the lower first molars of 5-day-old C57BL/6J mice, we used lead glass containing a hole as a collimator. We confirmed that our local irradiation method targeted only the tooth germ. The irradiated root was immature in terms of apical growth, and dentin formation was irregular along the outside of the root apices. Moreover, calcified tissue apically surrounded Hertwig's epithelial root sheath, which disappeared abnormally early. This method using a local irradiation experimental model will facilitate research into radiation-induced disorders of dental root formation.PMID:34388821 | DOI:10.1667/RADE-20-00081.1

Source: Radiation Research - August 13, 2021 Category: Physics Authors: Yoshiaki Ide Taka Nakahara Tetsuya Fukada Masanori Nasu Source Type: research