the goal of the study was to evaluate the pain reduction and healing efficiency of traumatic oral ulcers in children using low-level laser therapy with diode laser 980 nm, lidocaine oral gel and chlorhexidine mouthwash

thirty children were randomly allocated to three groups of ten individuals each: Group one: therapy, Group two: using Lidocaine gel 4 times daily and Group three using chlorhexidine mouthwash 4 times daily .

Assessment was done by evaluating pain by Visual Analogue scale; VAS (primary outcome) and assessment of ulcer size by periodontal probe (Secondary outcome) and Parental acceptance of the therapy (tertiary outcome) immediately after treatment, at day two, five, seven, then at two weeks

Inclusion Criteria:

• Children from 4-12 years without any apparent medical problem
• Children with history of receiving a dental procedure in the same or the previous day of the onset of ulcer.
• Children having restorations or teeth with sharp edges.
• Children with orthodontic or any other oral appliance.
• No previous treatment with any modality for the ulcer.
• Willingness to participate in the proposed clinical study.

Exclusion Criteria:

• Patients who had psychological or mental diseases.
• Patient under anticoagulants, anti-inflammatory or immunosuppressant medications.
• Children with systemic (endocrine-metabolic) disease; rheumatologic disease; hormone disorder; immunodeficiency; use of corticoid-based therapy.
• Uncooperative children or parents.
• Patients who did not participate twice weekly in the evaluations were excluded

the outcomes assessor was un aware of the type of treatment given to the patient