Autoradiographic investigation of proliferative responses in rat incisor pulp after vincristine administration

Abstract
VCR [Vincristine] (0.7 mg/kg) was given to 9 rats in 3 experimental groups, and 23 h later, the animals were injected with 3H-thymidine. The animals were then sacrificed 24, 48 and 72 h after the VCR injection, and by comparison with 9 control animals similarly injected with NaCl solution and nucleotide, VCR causes a delayed migration of pulp cells from the proliferative pool and a small but distinct inhibition of the incisal growth of the incisors. The growth inhibition corresponded to the normal growth over a 24 h period in non-VCR-injected animals.