Glass ionomer cement and resin modified glass ionomer cement are one of the restoration materials that are widely used by dentists. Its presence in the oral cavity causes glass ionomer cement and resin modified glass ionomer cement often in contact with food and beverages such as tangerine juice which can affect the compressive strength. The purpose of this study is to determine the effect of immersion in tangerine juice towards the compressive strength of glass ionomer cement and resin modified glass ionomer. This study was a true experimental with a post test only with control group design. Samples were made from GC Fuji 9 GP and GC Gold Label 2 LC with 36 samples each. Samples were divided into two groups. The first group (18 samples of GC Fuji 9 GP and 18 samples of GC Gold Label 2 LC) was immersed in tangerine juice for 24 hours in an incubator at 37°C. The second group (18 samples of GC Fuji 9 GP and 18 samples of GC Gold Label 2 LC) as a control was immersed in artificial saliva for 24 hours in an incubator at 37°C. The compressive strength was determined using a compression machine. The results showed that the mean compressive strength of glass ionomer cement immersed in tangerine juice was 14,03±0,48 MPa and immersed in artifical saliva was 52,08±0,67 MPa. The mean compressive strength of resin modified glass ionomer cement immersed in tangerine juice was 58,98±0,97 MPa and immersed in artifical saliva was 68,28±0,67 MPa. Data were analyzed with Independent T-test showing the results of p<0.05. The conclusion of this study was that there was an effect of immersion in tangerine juice towards the decreasing of the compressive strength of glass ionomer cement and resin modified glass ionomer cement.

Early Childhood Caries (ECC) is a state of occurrence of decayed (cavities and non cavities), missing (due to caries), or filling on one or more deciduous teeth in children aged ≤ 71 months. Wayne (1999) divided the severity of ECC into three classifications based on clinical signs, causes, and age of the child namely type I (mild), type II (moderate), and type III (severe). The rate of caries incidence is increasing in children who consume milk using bottles. Clinical pattern to ECC caused by bottle feeding has a distinctive pattern, which is about four upper incisors, while four lower incisors usually remain healthy. This study aims to determine the correlation between the history and pattern of bottle feeding and the severity of ECC in children aged 3-5 years in Kuranji District, Padang City. This study is an analytical study with a cross sectional approach. The study sample consisted of 58 children aged 3-5 years with a history of bottle feeding for at least two years. Samples are selected through consecutive sampling technique. Data are collected using questionnaires and through examining respondents' oral cavity. Data collected are analyzed using Chi-Square Test. Statistical test result shown p < 0,15 for each pattern of bottle feeding duration in years, the time of bottle feeding, the addition of sweeteners, and preventive measures. P is valued as > 0,15 for bottle feeding method. There is a significant relationship between the history and the pattern of bottle feeding duration in years, the time of bottle feeding, the addition of sweeteners, and preventive measures with the severity of ECC in children aged 3-5 years in Kuranji District, Padang City.