This study aims to determine the comparison of the inhibition zone between theextract of butterfly pea flower and lemongrass, against the bacteria streptococcusmutans and staphylococcus aureus. The samples that will be used in this researchare streptococcus mutans and staphylococcus aureus bacteria. Data analysis usednormality test and statistical test was performed using ANOVA analysis test and posthoc test. The results showed that there was no difference in the inhibition zone ofbutterfly pea flower extract against streptococcus mutans bacteria and lemongrassextract against streptococcus mutans. There was difference in the inhibition zonebetween butterfly pea flower extract against staphylococcus aureus bacteria andlemongrass extract against staphylococcus aureus bacteria. Butterfly pea flowerextract has a good inhibition zone in staphylococcus aureus bacteria. Lemongrassextract has the same inhibition zone against both types of bacteria

Background. This research is a study that seeks to explore the potential of robusta coffee bean extract in inhibiting the growth of Staphylococcus aureus bacteria, where this bacterium is one of the bacteria that is often found in the oral cavity and often causes infections and dental and oral problems. Methods. This research is an experimental study in vitro. Robusta coffee extract was tested at levels of 25%, 12.5%, 6.25%, and 3.125%, where each test group was tested on 6 plates of Staphylococcus aureus bacteria. Data analysis was carried out with the help of SPSS 25 software. Results. There was a significant difference in the inhibitory power of Robusta coffee extract (Coffea robusta) at concentrations of 25%, 12.5%, 6.25%, 3.125% on the growth of Staphylococcus aureus bacteria. Significant differences in inhibition were found in group I and II (p=0.002; mean diff = -0.83), group I and III (p=0.000; mean diff = -1.32), group I and IV (p= 0.000; mean diff = -2.12), group II with III (p=0.050; mean diff = -0.48), group II with IV (p=0.000; mean diff = -1.28), and group III with IV (p=0.002; mean diff = -0.80). Conclusion. Robusta coffee bean extract (Coffea robusta) has antibacterial activity against the growth of Staphylococcus aureus bacteria.

Piranti ortodonti, force, closed coil spring, elastomeric chain, minuman berkarbonasi.Pendahuluan: Closed coil spring dan elastomeric chain merupakan aksesoris ortodonti yang sering digunakan untuk menghasilkan force dalam menggerakkan gigi. Dimana kedua aksesoris tersebut memiliki sifat degradasi struktur yang disebabkan oleh beberapa faktor seperti pH, suhu dan fluoride. Minuman berkarbonasi merupakan minuman yang mengandung gas karbon dioksida. Karbon dioksida dan bahan acidifier meningkatkan keasaman minuman sehingga meningkatkan keasaman rongga mulut. Adapun tujuan penelitian ini adalah untuk mengetahui perubahan force antara elastomeric chain dan closed coil spring Nikel Titanium (NiTi) yang direndam dalam minuman berkarbonasi. Metode: Jenis penelitian ini adalah eksperimental laboratoris dengan jumlah sampel sebanyak 36. Sampel dikaitkan dalam 1 papan akrilik dan direndam dalam minuman berkarbonasi selama 24 jam, 72 jam, 168 jam dan 240 jam. Kemudian force diukur menggunakan force gauge NK-500 dan dicatat. Hasil: Uji statistik Kruskal Wallis (α= 0,05) menunjukkan bahwa minuman berkarbonisasi telah terbukti dapat menurunkan force, baik pada elastomeric chain maupun closed coil spring jika dilakukan perendaman dalam minuman berkarbonasi, dan penurunan force tersebut terbanyak terjadi pada closed coil.

In performing the orthodontic treatments, patients aim to improve their smile esthetical features which are influenced by the position, size, shape, and color of teeth. However, in recent decades, several aesthetical features that have been studied are buccal corridor, smile arc, incisor display, and gingival display. In this study, 32 subjects composed of 16 males and 16 females were photographed from the front-site by using a DSLR camera within smiling states. Smile arc and buccal corridor measurements were performed via Corel Draw 12 program. The extra broad and broad characteristics were found in male subjects which were 31.2% and 18.8% respectively, while the female subjects had a higher broad proportion of 43.7% and extra broad for 6.3%. The smile arc features in male subjects were found were straight smile (34.4%) and consonant smile (15.6%), in contrast, the percentage of the female students had a higher consonant smile (31.3%) than straight smile (18.8%). This study confirmed similar findings regarding the domination of the buccal corridor broad in the female population, whereas the extra broad is dominated by males. By contrast, the smile arc consonant is dominated by females, while the straight feature is dominated by males.

Penderita maloklusi sering mendapat respon buruk yang berdampak terhadap status psikososial individu. Hal ini mengakibatkan meningkatnya minat pemakaian peranti ortodonti cekat dari waktu ke waktu dikarenakan keinginan untuk memperbaiki estetika gigi. Penelitian ini bertujuan untuk mengetahui pengaruh pemakaian peranti ortodonti cekat terhadap status psikososial mahasiwa Fakultas Kedokteran Gigi Universitas Prima Indonesia. Jenis penelitian ini adalah survei analitik dengan desain cross sectional. Jumlah sampel dalam penelitian ini sebanyak 34 mahasiswa, terdiri dari 17 orang yang belum pernah memakai peranti ortodonti cekat dan 17 orang yang telah selesai pemakaian peranti ortodonti cekat. Teknik pengambilan sampel dengan purposive sampling. Status psikososial dikelompokkan menjadi status psikososial baik, sedang, dan buruk. Berdasarkan hasil penelitian didapatkan sebelum pemakaian peranti ortodonti cekat didominasi oleh status psikososial sedang sebanyak 13 orang (76,4%). Sedangkan setelah pemakaian peranti ortodonti cekat didominasi oleh status psikososial baik sebanyak 14 orang (82,4%). Uji Chi-Square (p value 0,000). Kesimpulan penelitian ini adalah terdapat pengaruh antara pemakaian peranti ortodonti cekat dengan status psikososial mahasiswa Fakultas Kedokteran Gigi Universitas Prima Indonesia.