To reduce radiotherapy complications of patients suffered from malignant tumor in head and neck.

Study group (247 cases of patients suffered from malignant tumoer in head and neck) were given the whole course intervention of dentist while doing radiotherapy, the incidence of the complication study group was investigated and compared with control group (213 cases).

There was no difference between study group and control group in short-term complications. But for the long-term complications, the incidence in study group was considerably less than that of control group.

The whole course intervention of dentists can reduce the radiotherapy complications in head and neck effectively and improve the life quality.