Fig. 4
From: IMRT delivers lower radiation doses to dental structures than 3DRT in head and neck cancer patients
Mean of the maximum and of the average dental doses delivered by 3DRT and IMRT according to the dental laterality in regard to primary tumors. a Teeth located ipsilateral to primary tumor received higher doses of radiation than their contralateral counterparts; however, this difference was significantly different only for those patients treated with IMRT. Legends: * Statistically significant difference according to t-test. Mean of the maximum doses: Contralateral teeth (3DRT) 47.70 Gy (±23.30 Gy) and ipsilateral teeth (3DRT) 51.90 Gy (±23.60 Gy); contralateral teeth (IMRT) 39.70 Gy (±17.30 Gy) and ipsilateral teeth (IMRT) 49.20 Gy (± 17.00 Gy). Mean of the average doses: Contralateral teeth (3DRT) 42.00 Gy (±23.60 Gy) and ipsilateral teeth (3DRT) 43.80 Gy (±23.30 Gy); contralateral teeth (IMRT) 31.80 Gy (±14.70 Gy) and ipsilateral teeth (IMRT) 39.50 Gy (± 15.50 Gy). b When we compared both techniques we observed that contralateral teeth of patients treated with 3DRT received statistically more radiation than those treated with IMRT. Legends: * Statistically significant difference according to t-test