Longitudinal periodontal deterioration and salivary dysfunction following head and neck radiotherapy: a prospective multicenter cohort study.

Head and neck radiotherapy progressively worsened periodontal health, reduced salivary flow, and increased radiation-related tooth decay and tooth loss in cancer survivors over 12 months, while quality of life declined significantly.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.