Effectiveness and Acceptability of SDF Compared to ART for the Management of Early Childhood Caries

The goal of this clinical trial is to assess the acceptability and clinical effectiveness of Silver Diamine Fluoride (SDF) in comparison with Atraumatic Restorative Treatment (ART) in Early Childhood Caries (ECC) management at the community level. The main question it aims to answer are:

• It's SDF more accepted and effective than ART in early childhood caries management when implemented at the community level?

Participants will be diagnosed by an experienced and calibrated dentist using the International Caries Detection and Assessment System (ICDAS), then children with decayed teeth will be treated with SDF (experimental) or ART (control); another operator will choose randomly the treatment for each participant. Furthermore, oral health education component will be given to children, parents and educators.

Follow-up visits will be made at 6 and 12 months after child's treatment is complete. Before and after treatment parents will be asked to complete a child personal background survey (before), Early Childhood Oral Health Impact Scale (ECOHIS) questionnaire (before and at follow-ups) and a oral health satisfaction survey (one week after treatment and at follow-ups).

Researchers will compare the SDF's groups and the ART's group to see which of them is more accepted and effective at community level.

Main outcome: parents and children acceptability to SDF and ART.

A randomized clinical trial (RCT) with parallels groups will be conducted on children from chilean public kindergarten and schools from 2 years up to 4 years and 11 months.

The aim of this clinical trial is to assess the acceptability and clinical effectiveness of Silver Diamine Fluoride (SDF) in comparison with Atraumatic Restorative Treatment (ART) in Early Childhood Caries (ECC) management at the community level. As well, this clinical trial sought to compare the oral health quality of life related and to contrast possible adverse effects between both therapies.

Participants will be screened and diagnosed by an experienced and calibrated dentist using the International Caries Detection and Assessment System (ICDAS), thereafter only children with decayed teeth (or tooth) will be treated. After the diagnostic participants eligibles will be randomly chosen by another operator to be treated with SDF or ART for all teeth who need treatment in the child:

* Experimental: SDF application in decayed teeth and oral health education component.
* Control: ART technique in decayed teeth and oral health education component.

The oral health education component will be given to children, parents and educators.

The eligible children parents will be asked to fulfill a children personal background survey (before treatment), the Early childhood oral health impact scale (ECOHIS) questionnaire (before and after treatment at follow-ups) and a oral health satisfaction survey (a week after treatment and at follow-ups).

N° Participants (anticipated): 221 teeth with caries lesions per group, assuming an average of 3 teeth with caries lesions per child, it's expected to treat 148 children (from 2 years up to 4 years and 11 months), with 74 children per group.

Eligibility Criteria:
Inclusion Criteria:

* Children belonging to INTEGRA or JUNJI kindergarten, from 2 years up to 5 years and 11 months with informed consent signed by parents and assent from the child.
* Children with at least one active cavitated caries lesion, extended in dentin with no signs of pulp involvement and diagnosed with ICDAS code 5.

Exclusion Criteria:

* Children with underlying systemic disease or disability
* Children with known allergies to dental materials used
* Children with transitory residence
* Children with severe alterations of the dental estructure