Effectiveness of Low Energy Laser Treatment in Oral Mucositis Induced by Chemotherapy and Radiotherapy in Head and Neck Cancer

Inclusion Criteria: * Patients diagnosed with squamous cell carcinoma of the oral cavity. * Patients aged between 18 and 80 years. * Patients who are to receive one of the following treatment * Combined radiotherapy (conventional fractionation 70 Gy reaching the tumor and affected lymph nodes, and 50 Gy in the areas ganglion drainage) and chemotherapy (cisplatin 100 mg/m2 IV on days 1, 22 and 43 irradiation or cetuximab 400mg/m2 as a single dose pre-load radiotherapy and 250mg/m2 weekly for the same. Regardless of whether they have received previous surgical treatment. * Treatment with radiotherapy of 70 Gy in 35 daily sessions 2Gy/día consecutive. * Patients who voluntarily express their intention to participate by informed consent. Exclusion Criteria: * Patients who denied informed consent. * Patients who have hypersensitivity or allergy to any of the components included in the study. * Patients diagnosed with HIV, and autoimmune diseases.