ABSTRAKKaries gigi merupakan salah satu penyakit gigi yang banyak terjadi di Indonesia. Salah satu bakteri yang berperan penting dalam terjadinya karies gigi adalah Streptococcus mutans. Tanaman sirsak (Annona muricata L.) telah digunakan secara turun temurun oleh sebagian masyarakat Indonesia untuk mengobati penyakit. Perbedaan kondisi lingkungan tempat tumbuh suatu tanaman dapat menyebabkan perbedaan jenis dan jumlah dari metabolit sekunder yang terkandung dalam tanaman. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri ekstrak etanol daun sirsak terhadap S.mutans ATCC 35668 serta menentukan kandungan senyawa metabolit sekunder. Jenis penelitian merupakan ekperimental laboratoris, dilakukan ekstraksi pada daun sirsak dengan metode maserasi menggunakan pelarut etanol 70%. Ekstrak etanol daun sirsak selanjutnya dilakukan skrining  tokimia dengan uji kromatogra lapis tipis (KLT). Uji aktivitas antibakteri dilakukan dengan metode dilusi cair. Penelitian ini menggunakan 5 konsentrasi yaitu 150; 125; 100; 75; 50 mg/ml. DMSO 5% digunakan sebagai kontrol negatif dan Chlorheksidine 5% digunakan sebagai kontrol positif. Berdasarkan uji KLT, ekstrak etanol daun sirsak mengandung senyawa metabolit sekunder berupa saponin, terpenoid, steroid,  avonoid, tanin, alkaloid. Ekstrak etanol daun sirsak dapat menghambat pertumbuhan bakteri S.mutans ATCC 35668 dengan KHM 125 mg/ml. Data dianalisis dengan menggunakan uji parametrik Anava satu jalur. Konsentrasi ekstrak terhadap pertumbuhan koloni S.mutans ATCC 35668 menunjukkan hasil signi kan (p<0,05). Ekstrak etanol daun sirsak memiliki aktivitas antibakteri terhadap S.mutans ATCC 35668 dengan KHM pada konsentrasi 125 mg/ml. Ekstrak etanol daun sirsak mengandung senyawa metabolit sekunder berupa saponin, terpenoid, steroid,  avonoid, tanin dan alkaloid. PENDAHULUANKaries gigi merupakan salah satu penyakit gigi yang banyak terjadi di Indonesia. Proses karies melibatkan banyak faktor, yaitu: pejamu (gigi dan saliva), substrat (makanan), bakteri penyebab karies dan waktu.1 Bakteri yang melekat pada permukaan gigi dengan faktor-faktor lainnya dapat menimbulkan karies.2 Salah satu bakteri yang

The demineralization of dental hard tissues can be caused by dental plaque. Dental plaque contains various components, especially bacteria attached to the extracellular matrix. Streptococcus mutans (S. mutans) has extracellular glucan as adhesin that is important in the attachment mechanism of tooth surface. The natural substance can be used for preventing plaque formation by inhibiting the attachment of S. mutans. Soursop plant has been used in treating various diseases. The leaves of the soursop (Annona muricata L.) are used as a material to inhibit potential attachment of bacteria S. mutans. Common surfaces that is used in adhesion testing is hydroxyapatite (HA). The aim of this study was to evaluate the effect of ethanol extract of soursop leaf (EESL) on the adhesion of S. mutans ATCC 35668 to HA discs. Soursop leaves were extracted by the maceration method using 70% ethanol. The experiment was carried out by analyzing the inhibition adhesion of S. mutans ATCC 35668 on HA discs after incubation with different concentrations of soursop leaf extract. The concentrations of extract tested were: 150; 125; 100; 75; and 50 mg/ml. Chlorhexidine 0.2% was used as a positive control while DMSO 5% was used a negative one. Data were evaluated by One Way Anova. This study statistically showed significant differences of S. mutans colony count between groups (p<0.05).The results of a post hoc Dunnett T3 test showed that the 2 highest concentrations of extract (125 and 150 mg/ml) reduced S. mutans adhesion on HA discs.The obtained results showed that ethanol extract of soursop leave inhibits the adherence of S. mutans to the HA disc.

Introduction: The Yogyakarta Special Region ranks sixth for highest number of smokers of the 33 provinces in Indonesia. Smokers account for 31.6% of the total population. Sleman Regency ranks fourth in daily consumption of cigarettes of the five regencies or cities in Yogyakarta. The body part most exposed to direct cigarette smoke is the oral cavity. Saliva is a liquid secreted inside the oral cavity to act as a buffer. Nicotine content in conventional cigarettes is known to diminish the salivary flow rate and the acidity (pH) of the saliva. A continual decrease in saliva pH over time may cause dental caries. The use of electronic cigarettes is a nicotine replacement therapy (NRT) method to help people quit smoking; they emit a lower nicotine level than conventional cigarettes. Objective: The aim of this study was to evaluate the saliva pH, salivary flow rates, and caries index of electronic cigarette smokers. Methods: This study used a cross-sectional method to compare the saliva pH, salivary flow rate, and caries index of 30 smokers of electronic cigarettes and 30 non-smokers as a control group. Data were analyzed using SPSS version 22.0 software and considered statistically significant at p < 0.05. Results: The Mann-Whitney analysis showed a significant difference in the saliva pH between electronic cigarette smokers and non-smokers. Independent T-Test analysis showed no significant difference in the salivary flow rates of the two groups. The Mann-Whitney analysis also showed no significant difference in the caries index of the groups. Conclusion: Results indicated that there is a significant difference in the saliva pH of electronic cigarette smokers, while the salivary flow rates and caries indices of electronic cigarette smokers and non-smokers were similar.

Introduction: Dental caries and dental plaque are the most popular global oral health problems. The primary step of dental caries is characterized by damage of tooth surfaces  affected by acids which are by-products of sugar metabolism by a cariogenic bacteria. One of the cariogenic bacteria is Streptococcus mutans. Annona muricata is traditionally applied as an herbal remedy for various illnesses and has been recognized in a previous study as an antimicrobial agent. The aim of this study was to investigate  acid production and adhesion of ethanol extract of Soursop on Streptococcus mutans. Methods: Soursop leaf extracted by maceration using 70% ethanol solvent. The extracts obtained were tested at various concentrations. To examine the effect of ethanol extract of Soursop on acid production by S. mutans, the pH of the culture was determined using a pH meter. Inhibition of adhesion of S. mutans to the saliva-coated hydroxyapatite (S-HA) discs was quantified using colony counting on TYS20B agar plates. Results: The pH of S. mutans cultures in the presence of ethanol extract of Soursop leaf at various concentrations was higher than negative control, but there were no differences in pH value between the various concentrations of ethanol extract of Soursop leaf. Adhesion of S. mutans to S-HA discs was inhibited by various concentrations of ethanol extract of Soursop leaf. Adhesion decreased with increasing concentrations of ethanol extract of Soursop leaf, but there was not significant difference in colony count between the various concentrations of ethanol extract of Soursop leaf. Conclusions: Ethanol extract of Soursop leaf attenuates the acid production and adhesion of S. mutans to hydroxyapatite discs. Keywords: Soursop (Annona muricata); Streptococcus mutans; acid production; adhesion