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All Journal Dentika Dental Journal Majalah Kedokteran Gigi Indonesia Dental Journal (Majalah Kedokteran Gigi) Scientific Dental Journal Andalas Dental Journal The Journal of Society Medicine (JSOCMED) Jurnal of Syiah Kuala Dentistry Society
Siti Bahirrah
Department Of Orthodontics, Faculty Of Dentistry, Universitas Sumatera Utara, Medan, Indonesia
Biochemistry, Genetics & Molecular Biology Dentistry Education Health Professions Immunology & microbiology Medicine & Pharmacology Neuroscience

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Accuracy of the Moyers 75% Probability Table in Predicting Dental Arch Space in Batak Ethnic Students at the University Sumatera Utara Arifa , Silvia; Bahirrah, Siti; Yusuf , Muslim; Sofyanti, Ervina
Journal of Society Medicine Vol. 4 No. 9 (2025): September
Publisher : CoinReads Media Prima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71197/jsocmed.v4i9.233

Abstract

Introduction: Accurate prediction of dental arch space is crucial for effective orthodontic treatment planning, particularly in mixed dentition analysis. The Moyers prediction table at 75% probability is widely used to estimate space requirements for unerupted canines and premolars, but its accuracy varies across populations due to ethnic differences in tooth size and arch dimensions. This study evaluates the accuracy of the Moyers 75% probability table in predicting dental arch space among Batak ethnic students at Universitas Sumatera Utara (USU). Methods: A cross-sectional study was conducted on 60 Batak ethnic USU students (30 males, 30 females, aged 18–25 years) with normal occlusion and no history of orthodontic treatment. Dental casts were obtained, and mesiodistal widths of mandibular incisors, canines, and premolars were measured using digital calipers (accuracy 0.01 mm). Actual measurements were compared with predicted values from the Moyers 75% probability table. Discrepancies were analyzed, and accuracy was assessed as the percentage of predictions within ±1 mm of actual measurements. Results: The Moyers table overestimated canine-premolar space by an average of 1.2 mm in males and 0.9 mm in females. Accuracy within ±1 mm was achieved in 65% of cases, with significant differences between predicted and actual values (p<0.05). Sexual dimorphism was observed, with larger discrepancies in males. Conclusion: The Moyers 75% probability table shows moderate accuracy in Batak ethnic students, suggesting the need for population-specific adjustments. Further studies should explore ethnic variations to enhance orthodontic prediction models.
The effect of the ethanolic extract of African leaves (Vernonia amygdalina Delile) on the corrosion rate and microstructure of stainless steel orthodontic wire Bahirrah, Siti; Ilyas, Syafruddin; Narmada , Ida Bagus; Primasari, Ameta; Lestari, Widya; Indra; Sofyanti, Ervina
Dental Journal (Majalah Kedokteran Gigi) Vol. 58 No. 4 (2025): December
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v58.i4.p376-381

Abstract

Background: Stainless steel orthodontic wire is commonly used in orthodontic treatment but is prone to corrosion; therefore, an inhibitor is required. Purpose: This study aimed to evaluate the effectiveness of the ethanolic extract of African leaves (Vernonia amygdalina Delile) as a corrosion inhibitor for stainless steel wires. Methods: A laboratory experiment with a pre- and post-test control group design was conducted. Samples included one negative control (artificial saliva), one positive control (chlorhexidine), and two treatment groups (ethanolic extract of African leaves at 3.125 mg/mL and 6.25 mg/mL), totaling 28 samples. Immersion lasted 7 days at 37°C. Corrosion rates were measured by weight loss, and microstructural changes were analyzed using a scanning electron microscope. Results: The highest average corrosion rate was observed in the chlorhexidine group (0.98 ± 0.58 mils per year [mpy]), whereas the lowest was in the 6.25 mg/mL extract group (−0.04 ± 0.80 mpy). Scanning electron microscope analysis revealed notable microstructural differences: the artificial saliva group showed long scratches scattered across the surface and localized round porosity; the chlorhexidine group exhibited rough scratches and widespread porosity; in contrast, the African leaves groups displayed minor scratches and a thin layer presumed to be protective. Conclusion: The ethanolic extract of African leaves considerably affects corrosion rates and microstructural changes in stainless steel orthodontic wires.
Mobe leaf (Artocarpus lakoocha Buch. Ham) ethanol extract's antibacterial activity on Streptococcus mutans cell membrane leakage and biofilm formation: An in vitro study Bahirrah, Siti; Satria, Denny; Yuwanda, Cindy
Dental Journal (Majalah Kedokteran Gigi) Vol. 56 No. 4 (2023): December
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v56.i4.p226-232

Abstract

Background: Using fixed orthodontic appliances inhibits oral hygiene, which can lead to the increased development of biofilms and Streptococcus mutans, a cariogenic bacterium that is well known for causing dental caries, derived from bacteria of the Streptococcus genus. In order to decrease biofilm and the degree of cariogenic bacteria in the oral cavity, a variety of herbal ingredients are used. Among these, mobe (Artocarpus lakoocha Buch. Ham) leaves are herbal ingredients with antibacterial properties. Purpose: This study aimed to investigate the antibacterial activity, antibiofilm, and leakage of DNA and protein from mobe leaves. Methods: The diffusion method was used to assess antibacterial activity and determine the minimum inhibitory concentration. The antibiofilm activity was evaluated with Ultraviolet–visible (UV-Vis) spectrophotometry (600 nm), using violet crystal staining. The detection of DNA and protein leakage was carried out by checking for absorbance values using the UV-Vis spectrophotometry (260 nm and 280 nm). An increase in the absorbance value in the measured cell indicated an increase in the level of cell content produced by the cell. One-way analysis of variance was used statistically analyze the results of this study (P < 0.05). Results: Mobe leaf (A. lakoocha) extract's minimum inhibitory concentration level was 3.125 mg/ml, the effective concentration of ethanol extract for inhibiting biofilm formation was 3.125 mg/ml, and the effective concentration of ethanol extract that could cause DNA and protein leakage was 50 mg/ml. Conclusions: Mobe leaf extract has good MIC for S. mutans.
Co-Authors Ameta Primasari Arifa , Silvia Dea Philia Swastika Denny Satria, Denny Ervina Sofyanti Felix Susanto Adiwinata Felix Susanto Adiwinata Hery Widijanto Indra Lidya Irani Nainggolan, Lidya Irani Lubis, Hilda Fitria Mimi Marina Lubis Muslim Yusuf Narmada , Ida Bagus Nazruddin Nazruddin Nazruddin Nazruddin Octavina Sitorus Ongko, Jennifer Xavier Pasaribu, Philiph Rumaisha, Khalila Sembiring, Bernadetta Suli Andryani Syafruddin Ilyas Yohana, Nelvi Yusuf , Muslim Yuwanda, Cindy