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All Journal Jurnal Kedokteran Gigi Universitas Padjadjaran Padjadjaran Journal of Dentistry Jurnal Abdimas Kartika Wijayakusuma
Azkya Patria Nawawi, Azkya Patria
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Humanities Biochemistry, Genetics & Molecular Biology Dentistry Education Health Professions Immunology & microbiology Medicine & Pharmacology Public Health Social Sciences Other

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The influence of bamboo fiber (gigantochloa apus) positioning on the flexural strength of heat-cured acrylic resin: an experimental research Nawawi, Azkya Patria; Endro, Hartanto; Hamumpuni, Tarish; Assoratgoon, Itt
Padjadjaran Journal of Dentistry Vol 37, No 3 (2025): November 2025
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol37no3.62953

Abstract

Introduction: Acrylic resin is prone to fracture. Apus bamboo fiber (Gigantochloa apus), a natural fiber, is anticipated to enhance the flexural strength of acrylic resin. The fiber's position within the acrylic resin matrix is hypothesized to influence its effectiveness in improving flexural strength. The objective of this study was to investigate the impact of incorporating apus bamboo fibers, based on their position, on the flexural strength of heat-cured acrylic resin plates. Methods: This study employed a laboratory experimental design with a post-test only control group. Twelve rectangular heat-cured acrylic resin plates, measuring 65 mm × 10 mm × 2.5 mm, were prepared in accordance with ISO 178:2019 and were thoroughly polished. The samples were divided into four groups, including three groups with the addition of apus bamboo fiber at a concentration of 1.6%, positioned at the upper, middle, and lower sections and one negative control group consisting of heat-cured acrylic resin plate without the addition of apus bamboo fiber. The samples underwent a three-point bending test using a Universal Testing Machine (UTM). Data analysis was conducted using a one-way ANOVA and an independent t-test. Results: The average flexural strength was 89.34 MPa in the negative control group, 69.35 MPa in the upper fiber group, 82.54 MPa in the middle fiber group, and 106.98 MPa in the lower fiber group. Statistical analysis indicated that the position of apus bamboo fibers significantly affected flexural strength (p<0.05). Conclusion: It can be concluded that the position of apus bamboo fibers influences the flexural strength of heat-cured acrylic resin. Apus bamboo fibers placed in the lower position, corresponding to the anatomical base of the denture, exhibited the highest flexural strength among all groups.
Correlation analysis of saliva volume and salivary pH on dental caries status in children aged 11-12 years using the HI BOGI application: a cross sectional study Fadilah, Rina Putri Noer; Rivmawati, Lestary; Nawawi, Azkya Patria; Supriatna, Andi; Pribadi, Ari Prayogo
Padjadjaran Journal of Dentistry Vol 37, No 3 (2025): November 2025
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol37no3.66132

Abstract

Introduction: Oral health is a key indicator of overall wellbeing, with dental caries remaining one of the most prevalent oral health problems in Indonesia. Saliva, particularly its volume and pH, is an important host factor influencing caries development. This study aims to analyze the association between saliva volume and salivary PH and dental caries  among schoolchildren using the HI BOGI application. Methods: An analytic observational study with a cross-sectional design was conducted among 11–12-year-old students from six randomly selected primary schools in Cimahi City (n=285). Saliva volume and pH were measured, and dental caries experience was assessed using the HI BOGI application. Data were analyzed using the Spearman rho correlation test. Results: Children with lower saliva volume and more acidic saliva pH demonstrated higher DMF-T scores. Correlation tests indicated a relationship between low salivary volume and dental caries incidence (rs= –0.117; p≤0.05) and between salivary pH and caries (rs= –0.287; p≤0.05). Conclusion: saliva volume and acidic saliva pH are significant risk factors for dental caries incidence among 11–12-year-old children as identified through the HI BOGI application assessment.
Co-Authors Andi Supriatna, Andi Ari Prayogo Pribadi Arifianti, Isti Asri, Ayu Assoratgoon, Itt Atia Nurul Sidiqa Darwis, Rudi Endro, Hartanto Hamumpuni, Tarish Herryawan Herryawan, Herryawan Himawati, Marlin Isnaeni, Rheni Safira Lestari, Putri Dwi Maulani, Alia Fatimah Ratih Widyasari, Ratih Rina Putri Noer Fadilah, Rina Putri Noer Rina Putri Noer Fadillah, Rina Putri Noer Rivmawati, Lestary Sri Sarwendah, Sri