Background: One over many ways to treat dental caries is by restoration. Glass ionomer cement (GIC) is the restorations material that bonds physically and chemically to tooth structure. GIC has been developed by combining the conventional material with monomer resin, known as resin modified GIC (RMGIC). Presently, with the development of nano technology, RMGIC restoration also available in the form of nano particles, called nanofilled RMGIC (RMGICn). One disadvantage of GIC is the marginal gap which may affects the durability of restoration. Purpose: The purpose of this study to compare the marginal gap width of RMGIC and nanofilled RMGIC. Methods: This study used scanning electron microscope (SEM) to observing and measuring the marginal gap width in two kelompoks of 9 maxillary first premolar teeth. The first kelompok restored with RMGIC, the second kelompok restored with nanofilled RMGIC. Following immersion in artificial saliva and the teeth were thermocycled at a temperature of 5 o C, 37 o C, and 55 o C (250 cycles) 1 minute each. Data analysis was done using independent t-test with 95% confidence interval (α = 0.05). Results: Statistical test showed a significant difference for marginal gap width in both kelompok (p = 0.000). Conclusion: There is marginal gap in RMGIC and RMGICn restoration. RMGIC restoration presented lower marginal gap width than RMGIC.

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Teknik in office bleaching merupakan salah satu teknik pemutihan gigi yang dilakukan oleh dokter gigi ditempat praktek. Aplikasi bahan in office bleaching tidak hanya mempunyai efek terhadap jaringan gigi, tetapi juga mempunyai efek pada tumpatan gigi, seperti resin komposit nanohybrid.Tujuan: untuk meneliti pengaruh bahan in office bleaching hidrogen peroksida 35% terhadap kekasaran permukaan resin komposit nanohybrid dengan berat matriks yang berbeda. Metode: yang digunakan adalah true experimental design menggunakan 32 sampel resin komposit yang dibagi menjadi 2 kelompok, yaitu kelompok A dan kelompok B. Kelompok A merupakan resin komposit

Actinomyces spp. is a bacterium that can cause root canal failure. Many antibacterial materials have been used to kill Actinomyces spp., especially natural materials for developing dentistry green economics. One is grapes (Vitis vinifera variant Red globe) because they have active antibacterial compounds, flavonoids, phenolic acids, and tannins. This study aims to determine the antibacterial effectivity of ethanol extract of red grapes (Vitis vinifera variant Red globe) as a root canal irrigation material against the growth of Actinomyces spp. bacteria in vitro. This study used a true experimental research using the dilution methods with 8 sample groups, consisting of K(-), K(+), 25%, 22,5%, 20%, 17,5%, 15%, dan 12,5%. Kruskal Wallis was statistical analysis tested to determine the significance of differences in the treatment group. Minimum Bactericidal Concentration (MBC) at a concentration of 15%. Statistical tests showed significant differences in the effect of ethanol extract of red grapes (Vitis vinifera variant Red globe) at each concentration in inhibiting the growth of Actinomyces spp. bacteria. In this study, the ethanolic extract of red grapes (Vitis vinifera variant Red globe) has antibacterial effectivity as a root canal irrigation material against the growth of Actinomyces spp. bacteria in vitro.