Estudo de fase III, prospectivo, aleatorizado e duplo-cego de prevenção de mucosite oral com laser de baixa potência. Foram incluídos pacientes portadores de câncer de cabeça e pescoço, tratados com radioquimioterapia. Grupo A laser 2,5 J/cm2 diariamente durante o tratamento e grupo B laser placebo. Inclusão de 75 pacientes (A/B 37/38). Grau III /IV mucosite: A/B 2a semana (4/5) P=1.0, 4a semana (4/12) P=0.04 e 6a semana (8/9) P=1.0. Interrupções da RT devido à mucosite A/B 0/6 P=0.02. Dor severa A/B 2a semana (5/5), 4a semana (8/8) e 6a semana (8/8) P=1.0. O tratamento com laser foi efetivo, tendo adiado o aparecimento da mucosite severa e reduzido as interrupções da radioterapia.

Phase III, prospective, randomized, double-blind study of oral mucositis prophylaxis by low energy laser. Patients included had a diagnosis of head and neck cancer and were managed with radiochemotherapy. Arm A laser 2.5 J/cm2 daily throughout treatment and B sham laser. Inclusion of 75 patients (A/B 37/38). Grade III /IV mucositis A/B: week 2 (4/5) P=1.0, week 4 (4/12) P=0.04 and week 6 (8/9) P=1.0. Treatment breaks due to mucositis A/B 0/6 P=0.02. Severe pain A/B week 2 (5/5), week 4 (8/8) and week 6 (8/8) P=1.0. Low laser therapy was effective, delaying severe mucositis and reducing radiotherapy breaks.