Table 1.

0–5 scoring system

Score	Damage degree of oral mucosa induced by irradiation
0	Normal mucosa
1	Erythema and vasodilation
2	Severe erythema and vasodilation, with erosion of superficial aspects of mucosa leaving denuded areas with decreased stippling of the mucosa
3	Severe erythema, vasodilation, and the formation of ulcers in one or more places (in which the cumulative size of ulcers involved was ∼25% of the buccal mucosa), and pseudomembrane formation was evident
4	Severe erythema and vasodilation, and the formation of ulcers in one or more places (in which the cumulative size of the ulcers involved was ∼50% of the buccal mucosa), together with a loss of mucosal pliability
5	Diffuse, extensive ulceration.