Children with primary teeth with dentin carious lesions without pulp involvement, who have previously been treated with either Silver Diamine Fluoride (SDF) followed by Resin Modified Glass Ionomer or with Resin Modified Glass Ionomer alone, will be retrieved from the Pediatric Dentistry and Dental Public Health Department records. The aim of the study, a detailed description of the procedure, and how the tooth will be used, will be explained to the parents and their child, and written informed consent from the parents and assent from the child will be obtained.