Mice embryos were irradiated in utero by gamma rays (٠،٢،٤،٦ Gy) at
١٠،١٢،١٤،١٦،١٨ days of gestation. Histological study was carried out on the
first premandibular molar after ٢،٤،٦،٨ days of irradiation, to investigate the
effect of irradiation on different stages of molar development.
The Rootcanal treatment is considered as the most accurate one
followed in (( dentistry )), which need a right diagnosis and exact
treatment steps to be performed completely for an excellent
prognosis treatments ended by along time –perfect success.
