<prompt> Radiation induced caries occurs in?1 month3 months6 months9 months  <response>: Radiation-related caries and other dental hard tissue changes can appear within the first 3 months following RT.Ref: Gupta N, Pal M, Rawat S, et al. Radiation-induced dental caries, prevention and treatment - A systematic review. Natl J Maxillofac Surg. 2015;62:160-166. doi:10.41030975-5950.183870 