Primary molars are the teeth with the highest caries tendency among primary teeth due to their anatomical features such as wide and flat interface areas. However, some difficulties are encountered during the removal of caries due to the structural features of primary molars and the young age of the child. Therefore, in the treatment of primary molars, Atraumatic Restorative Treatment (ART), in which the soft parts of the carious lesion are cleaned with the help of a sharp hand tool and restored with an adhesive glass ionomer cement (GIC) that releases fluoride, in the following years, the deciduous teeth were removed with a minimally invasive approach. Hall technique, in which a stainless steel crown (SSC) is placed without preparation for treatment, has come to the fore.

Many restorative materials, especially GIC, have been used for ART procedures, and with the advancing technology, high-viscosity glass ionomer cements with improved mechanical and chemical properties have emerged. In recent years, zinc-added HVGICs and nano-filled resin-modified HVGICs have been introduced.

The Hall Technique has been suggested in the treatment of asymptomatic decayed primary molars in anxious and fearful patients to ensure patient cooperation. In this technique, it is aimed to stop the progression of caries by covering the carious deciduous molars with SSC and cutting their relationship with the oral environment, without the need for local anesthesia and tooth preparation. Thus, as the bacteria cannot use the carbohydrates in the oral environment, the number of bacteria in the environment will also decrease.

Inclusion Criteria:

• children with no systemic disease,
• children who had a Frankl Behavioral Scale score 2,
• children who have no occlusal problems or bad habits,
• children presenting between 2-5 caries lesion in primary molars.

Exclusion Criteria:

• teeth with presence of radyolusens in furcation and/or periradicular areas,
• teeth with pathologic resorption and internal/external resorption