Even though, some recovery is possible after 12 to18 months after RT, with increase
in salivary flow up to 32% from 1 to5 years after treatment , depending on the
dose received and volume of the gland tissue irradiated, xerostomia develops into
an irreversible, life-long health problem that significantly reduces quality of life for
the patients. It was also shown when multiple daily treatments are given in small
fractionated doses (