The aim of this research was to assess the impact of Oral Health-Related Quality of Life (OHRQoL) on children and their families affected by Traumatic Dental Injury (TDI) after insertion into a Dental Trauma Care Program (DTCP). After a sample size calculation, this non-randomized clinical study was composed of a consecutive sample of 2 to 6-year-old children registered in the DTCP from 2012-2019. Parents/Caregivers were interviewed to fill up an OHRQoL questionnaire. The Brazilian version of the Early Childhood Oral Health Impact Scale (B-ECOHIS) was applied (in form of an interview) to evaluate the impact of TDI on OHRQoL before, and after treatment. The scores of the B-ECOHIS were calculated using the additive method, summing the numeric response codes for each item. The Andreassen classification was used to determine the TDI. The patients were treated (minimally intervention/invasive intervention) according to TDI severity (uncomplicated/complicated). The Kolmogorov-Smirnov test was performed to evaluate the normality of the data to determine the use of parametric or non-parametric tests. Mean or median comparisons were made for items in the overall scale and subscale scores to compare B-ECOHIS total scale/subscales/domains before and after insertion in DTCP. The responsiveness was assessed by analyzing the change in the scores on the scales and subscales. The changes were calculated by subtracting the post-treatment scores from the before-treatment scores. Positive change scores indicate an improvement in OHRQoL, while negative scores indicate deterioration. TDI severity and treatment-associated were also evaluated.

It is recognized that measurements OHRQoL are essential strategies of oral health surveys, clinical trials, and studies evaluating the outcomes of preventive and therapeutic program. In the literature it is observed efficacy on OHRQoL outcomes focused on oral health education (OHE) associated to: atraumatic restorative treatment (ART), dental caries, gingivitis.

In the literature it is also seen that the presence of TDI is associated to negative impact on OHRQoL)that affects physical and psychosocial consequences for children and their families. The treatment of TDI is a challenge, that it is related to an improvement on famil and on children from 8 to 14 years and attended in a center of surveillance for TDI.

For a broader understanding of the consequences of outcomes of preventive and therapeutic program for TDI, it is important to expand the assessment of its performance using an OHRQoL measure for other ages of children.

Inclusion Criteria:

• children aged from 2 to 6 years who suffered some type of TDI in the deciduous dentition
• healthy patients without disabilities
• children don't used interceptive orthodontic braces or prostheses
• TDI that occurred in the last 3 months before the first questionnaire application
• TDI treatment completed up to 3 months before the second questionnaire application

Exclusion Criteria:

• parents/caregivers that refuse to answer the questionnaire at any point
• parents/caregiversor who do not agree to sign the consent terms