Oxidative Stress, Microbiome Dysbiosis, and Oral Mucositis After Radiotherapy: Cause, Consequence, or Vicious Cycle? Cintaonela Artti Benecia1, Retno Pudji Rahayu2* Abstract Radiation-induced oral mucositis is a common complication of radiotherapy in patients with head and neck cancer, resulting from complex interactions between cellular damage, oxidative stress, inflammation, and oral microbiome