Co-relation of the incidence of tooth formation anomalies to the age at chemotherapy. (a) In the conventional chemotherapy (CC) group, the incidence of tooth agenesis or microdonts is not normally distributed or correlated to the age at the start of CC (y = −1.2442x + 10.503, R2 = 0.1335). (b) In the CC group, scores of tooth formation anomalies (TFA) are not normally distributed or correlated to the age at the start of CC (y = −0.817x + 11.701, R2 = 0.1299). (c) In the CC + high-dose chemotherapy without total body irradiation (HDC) group, the incidence of tooth agenesis or microdonts showed a normal distribution but no statistical correlation to the age at the 1st high-dose chemotherapy (y = −3.1552x + 30.853, R2 = 0.525). (d) In the HDC group, TFA scores showed both a normal distribution and statistical correlation to the age at the 1st high-dose chemotherapy (y = −3.5344x + 43.342, R2 = 0.7122).