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All Journal Jurnal Kedokteran Gigi Universitas Padjadjaran Pendas : Jurnah Ilmiah Pendidikan Dasar B-Dent, Jurnal Kedokteran Gigi Universitas Baiturrahmah PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Menara Ilmu Padjadjaran Journal of Dental Researchers and Students JITEKGI Jurnal Ilmiah dan Teknologi Kedokteran Gigi MDJ (Makassar Dental Journal) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Cakradonya Dental Journal
Widya Puspita Sari
Bagian Dental Material FKG UNBRAH
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Dentistry Economics, Econometrics & Finance Education Health Professions Immunology & microbiology Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Public Health Social Sciences Other

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Pengaruh penambahan kombinasi zat aditif pada gipsum tipe III daur ulang terhadap kekuatan tekan dan waktu pengerasanThe effect of adding combination of additives to recycled type III gypsum on compressive strength and hardening time Yandi, Satria; Sari, Widya Puspita; Hamonangan, Ihut
Padjadjaran Journal of Dental Researchers and Students Vol 5, No 1 (2021): April 2021
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjdrs.v5i1.32255

Abstract

Pendahuluan: Limbah gipsum tipe III (dental stone) dapat menimbulkan masalah pencemaran lingkungan karena sulit diuraikan serta dapat bercampur dengan limbah makanan. Permasalahan tersebut diatasi dengan mendaur ulang gipsum dengan cara menambahkan kombinasi zat aditif untuk mempercepat waktu pengerasan dan menambah kekuatan tekan gipsum. Tujuan penelitian adalah menganalisis pengaruh penambahan kombinasi larutan seng sulfat dan kalium sulfat terhadap kekuatan tekan dan waktu pengerasan pada gipsum tipe III daur ulang. Metode: Desain penelitian adalah eksperimental laboratorium. Penelitian ini dilakukan pengambilan masing-masing 4 sampel pada 3 kelompok perlakuan penambahan kombinasi zat aditif. Penelitian dilakukan di Laboratorium Universitas Baiturrahmah dan Laboratorium Teknik Metalurgi Universitas Andalas. Hasil: Kelompok 1 penambahan K2SO4 1,5% + ZnSO4 4,5% hasil kekuatan tekan 4,68 MPa dan waktu pengerasan 96 jam. Kelompok 2 penambahan K2SO4 2% + ZnSO4 5% hasil kekuatan tekan 3,12 MPa dan waktu pengerasan 91 jam. Kelompok 3 penambahan K2SO4 2,5% + ZnSO4 5,5% hasil kekuatan tekan 1,56 MPa dan waktu pengerasan 88 jam. Simpulan: Terdapat pengaruh penambahan larutan kalium sulfat dan seng sulfat terhadap kekuatan tekan dan waktu pengerasan pada gipsum tipe III daur ulang. Semakin tinggi jumlah penambahan zat aditif K2SO4 dan ZnSO4 pada gipsum daur ulang didapatkan nilai kekuatan tekan semakin rendah dan waktu pengerasan semakin singkat.Kata kunci: Gipsum daur ulang, kombinasi zat aditif, kekuatan tekan, waktu pengerasan. ABSTRACT Introduction: Gypsum waste type III (dental stone) can cause environmental pollution problems due to its difficulty in decomposing and potential mixed with food waste. This problem is overcome by recycling the gypsum by adding additives to speed up the hardening time and increase the compressive strength of the gypsum. The research objective was to analyse the effect of adding a combination of zinc sulfate and potassium sulfate solutions on the compressive strength and hardening time of recycled type III gypsum. Methods: The research design was laboratory experimental. This research was carried out by taking four samples each in 3 treatment groups with a combination of additives. The research was conducted at the Baiturrahmah University Laboratory and the Andalas University Metallurgical Engineering Laboratory. Results: Group 1: the addition of K2SO4 1.5% + ZnSO4 4.5% results in compressive strength of 4.68 MPa and a hardening time of 96 hours. Group 2: the addition of 2% K2SO4 + 5% ZnSO4 resulted in compressive strength of 3.12 MPa and a hardening time of 91 hours. Group 3: the addition of 2.5% K2SO4 + 5.5% ZnSO4 resulted in compressive strength of 1.56 MPa and a hardening time of 88 hours. Conclusion: There is an effect of adding potassium sulfate and zinc sulfate solutions on the compressive strength and hardening time of recycled type III gypsum. The higher the amount of K2SO4 and ZnSO4 additives added to recycled gypsum, the lower the compressive strength value and the shorter the hardening time.Keywords: Recycled gypsum, combination of additives, compressive strength, hardening time.
The Effect of Non-Dental E-Glass Fiber Position on the Flexural Strength of Fiber Reinforced Composite Mia Nur Aziza; Widya Puspita Sari; Netta Anggraini
Cakradonya Dental Journal Vol 17, No 2 (2025): Agustus 2025
Publisher : FKG Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/cdj.v17i2.37503

Abstract

Fixed denture is a treatment used to replace missing teeth. Fiber Reinforced Composite using dental E-glass fiber is an alternative material due to its biocompatibility, good aesthetics, and adaptability to the oral cavity.However in Indonesia, its availibility is limited and the cost is relatively high. Non-dental E-glass fiber, which has been widely used in engineering sectors, has a composition that is largely similar to dental E-glass fiber. This study aims to understand the effect of the position of non-dental E-glass fiber on the flexural strength of Fiber Reinforced Composite. This experimental study tested Fiber Reinforced Composite with non dental E-glass fiber placed in various positions using a Universal Testing Machine (UTM), and the results were analyzed with One-Way ANOVA. The test results showed that Fiber Reinforced Composite with fiber positioned on the tension side has the highest flexural strength, at 213.11 MPa, while placement on the compression side has the lowest value of 179.98 MPa. It was concluded that the position of non-dental E-glass fiber affects the flexural strength of Fiber Reinforced Composite.
Antibacterial activity test of stevia leaf extract (Stevia rebaudiana) in inhibiting the growth of streptococcus mutans on acrylic resin surfaces: Study experimental Fidella, Dwi Yufika; Sari, Widya Puspita; Widyawati, Widyawati; Firdaus, Firdaus
Padjadjaran Journal of Dental Researchers and Students Vol 10, No 2 (2026): June 2026
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjdrs.v10i2.69753

Abstract

ABSTRACT Introduction: Acrylic resin is the primary material used for removable denture bases, but its porous nature facilitates bacterial adhesion and colonization, including Streptococcus mutans. Chemical cleaners like sodium hypochlorite are effective as antibacterial agents, but long-term use can damage the physical properties of acrylic resin. Stevia leaf extract (Stevia rebaudiana) is known for its antibacterial activity and potential as a safer natural alternative. This study aimed to analyze the antibacterial activity of stevia leaf extract (Stevia rebaudiana) in inhibiting Streptococcus mutans growth on acrylic resin surfaces and identify the most effective concentration. Methods: This was an experimental laboratory study with a post-test only control group design. Samples consisted of acrylic resin plates soaked in stevia extract at concentrations of 70%, 80%, and 90%, with sodium hypochlorite as the positive control and Aquadest as the negative control. Streptococcus mutans growth was measured using spectrophotometry based on optical density (OD). Data analysis involved the Shapiro-Wilk test, the Kruskal-Wallis test, and the Mann-Whitney test. Results: Stevia leaf extract showed significant antibacterial activity in inhibiting Streptococcus mutans growth on acrylic resin surfaces (p<0.05). The 80% concentration was the most effective compared to 70% and 90%. Conclusion: Stevia leaf extract (Stevia rebaudiana) demonstrated antibacterial activity against Streptococcus mutans on acrylic resin, with an optimal concentration of 80%.KEY WORDS: Stevia leaf extract, Streptococcus mutans, acrylic resin, antibacterial activityUji aktivitas antibakteri ekstrak daun stevia (stevia rebaudiana) dalam menghambat pertumbuhan streptococcus mutans pada permukaan resin akrilik: Studi eksperimentalABSTRAK Pendahuluan: Resin akrilik merupakan bahan utama basis gigi tiruan lepasan, namun sifatnya yang porus memudahkan perlekatan dan kolonisasi bakteri seperti Streptococcus mutans. Pembersih kimia seperti Sodium hypochlorite efektif sebagai antibakteri, tetapi penggunaan jangka panjang dapat merusak sifat fisik resin. Ekstrak daun stevia (Stevia rebaudiana) diketahui memiliki aktivitas antibakteri dan berpotensi sebagai alternatif alami yang lebih aman. Tujuan penelitian menganalisis aktivitas antibakteri ekstrak daun stevia (Stevia rebaudiana) dalam menghambat pertumbuhan Streptococcus mutans pada permukaan resin akrilik serta menentukan konsentrasi yang paling efektif. Metode: Penelitian eksperimental laboratorium dengan desain post-test only control group. Sampel berupa lempeng resin akrilik direndam dalam ekstrak stevia konsentrasi 70%, 80%, dan 90%, Sodium hypochlorite sebagai kontrol positif, serta Aquadest sebagai kontrol negatif. Pertumbuhan Streptococcus mutans diukur menggunakan spektrofotometri berdasarkan Optical Density (OD). Analisis data menggunakan uji Shapiro-Wilk, Kruskal-Wallis, dan Mann-Whitney. Hasil: Ekstrak daun stevia menunjukkan aktivitas antibakteri signifikan dalam menghambat pertumbuhan Streptococcus mutans pada permukaan resin akrilik (p<0,05). Konsentrasi 80% paling efektif dibandingkan 70% dan 90%. Simpulan: Ekstrak daun stevia (Stevia rebaudiana) terdapat aktivitas sebagai antibakteri terhadap Streptococcus mutans pada resin akrilik, dengan konsentrasi 80% optimal.KATA KUNCI: Ekstrak daun stevia, Streptococcus mutans, resin akrilik, antibakteri 
Antibacterial activity test of nipah leaf extract (Nypa fruticans Wurmb) in inhibiting the growth of Lactobacillus acidophilus ATCC 4356 on the surface of hot-polymerized acrylic resin: Study experimental Ferdina, Resa; Azzahra, Nadya Alifia; Hadi, Azmil; Sari, Widya Puspita
Padjadjaran Journal of Dental Researchers and Students Vol 10, No 3 (2026): Oktober 2026
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjdrs.v10i3.69567

Abstract

ABSTRACTIntroduction: Heat-polymerized acrylic resin is the most commonly used material for denture bases. Its porous and rough surface characteristics may facilitate the adhesion of microorganisms such as Lactobacillus acidophilus, thereby increasing the risk of denture stomatitis. Chemical denture cleansers such as sodium hypochlorite are effective disinfectants; however, they may damage the surface of acrylic resin. Therefore, a safer natural alternative is needed, such as nipah leaf extract (Nypa fruticans Wurmb.), which has antibacterial potential. This study aimed to evaluate the antibacterial activity of nipah leaf extract in inhibiting the growth of Lactobacillus acidophilus ATCC 4356 on the surface of heat-polymerized acrylic resin. Methods: This study was a laboratory experimental study using a post-test only control group design. A total of 25 heat-polymerized acrylic resin specimens were prepared. The sample size was calculated using Federer's formula (t−1)(r−1)≥15, resulting in five replications for each group. The specimens were divided into groups treated with 10%, 15%, and 20% nipah leaf extract, along with positive and negative control groups. Bacterial growth was measured using the UV–Vis spectrophotometric method. Data were analyzed using the Shapiro–Wilk test, Levene's test, One-Way ANOVA, and Tukey's HSD post hoc test. Results: The results showed a significant difference in Lactobacillus acidophilus growth among the treatment groups (p<0.05). Nipah leaf (Nypa fruticans Wurmb.) extract at a concentration of 20% showed the greatest inhibitory effect on bacterial growth compared with the other concentrations. Conclusion: Nipah leaf extract (Nypa fruticans Wurmb.) showed antibacterial activity against Lactobacillus acidophilus ATCC 4356 on the surface of heat-polymerized acrylic resin and may have potential as a natural alternative for denture cleaning.KEYWORDS: Antibacterial activity, nipah leaf (Nypa fruticans Wurmb) extract, Lactobacillus acidophilus, heat-polymerized acrylic resinUji aktivitas antibakteri ekstrak daun nipah dalam menghambat pertumbuhan Lactobacillus acidophilus ATCC 4356 pada permukaan resin akrilik polimerisasi panas: Studi eksperimentalABSTRAKPendahuluan: Resin akrilik polimerisasi panas merupakan bahan yang paling sering digunakan sebagai basis gigi tiruan. Sifat porositas dan kekasaran permukaannya dapat mempermudah perlekatan mikroorganisme, salah satunya Lactobacillus acidophilus, sehingga meningkatkan risiko terjadinya denture stomatitis. Pembersih gigi tiruan berbahan kimia seperti sodium hipoklorit efektif sebagai desinfektan, tetapi berpotensi merusak permukaan resin akrilik. Berdasarkan kondisi tersebut, diperlukan alternatif bahan pembersih alami yang lebih aman, salah satunya ekstrak daun nipah (Nypa fruticans Wurmb.) yang diketahui memiliki aktivitas antibakteri. Penelitian ini bertujuan untuk menganalisis aktivitas antibakteri ekstrak Nypa fruticans Wurmb. dalam menghambat pertumbuhan Lactobacillus acidophilus ATCC 4356 pada permukaan resin akrilik polimerisasi panas. Metode: Jenis penelitian ini adalah eksperimental laboratoris dengan rancangan post-test only control group design. Jumlah sampel penelitian sebanyak 25 plat resin akrilik polimerisasi panas yang ditentukan berdasarkan rumus Federer (t-1)(r-1)≥15, sehingga diperoleh lima kali pengulangan pada masing-masing kelompok perlakuan. Sampel dibagi ke dalam kelompok ekstrak Nypa fruticans Wurmb. konsentrasi 10%, 15%, dan 20%, kelompok kontrol positif, serta kontrol negatif. Pertumbuhan bakteri diukur menggunakan metode spektrofotometri UV-Vis. Data dianalisis menggunakan uji Shapiro-Wilk, uji Levene, uji One Way ANOVA, dan uji lanjut Tukey HSD. Hasil: Hasil penelitian menunjukkan adanya perbedaan yang bermakna pada pertumbuhan Lactobacillus acidophilus antar kelompok perlakuan (p < 0,05). Ekstrak Nypa fruticans Wurmb. pada konsentrasi 20% menunjukkan daya hambat paling tinggi terhadap pertumbuhan bakteri dibandingkan konsentrasi lainnya. Simpulan: Ekstrak Nypa fruticans Wurmb memiliki aktivitas antibakteri dalam menghambat pertumbuhan Lactobacillus acidophilus ATCC 4356 pada permukaan resin akrilik polimerisasi panas dan berpotensi digunakan sebagai alternatif bahan pembersih gigi tiruan alami.KATA KUNCI: aktivitas antibakteri, ekstrak Nypa fruticans Wurmb, Lactobacillus acidophilus, resin akrilik polimerisasi panas. 
Co-Authors Adiva Afnela Putri Adriansyah Adriansyah Afifah, Rifdah Al Isra, Muhammad Firman Alamsyah, Yenita Amly, Dina Auliya Amri Bakhtiar Anggraeni, Lulu Miftakhul Izzah Ardila, Vidia Ananda Azzahra, Nadya Alifia Chairunnisa, Fita Chitra Annesha Pratiwi Citra Lestari Darmawangsa Darmawangsa Darmawangsa Darmawangsa Darmawangsa Darmawangsa, Darmawangsa Darmawangsa, Darmawangsa Deby Anzules Dedi Sumantri Desnita, Eka Dewi Elianora Dian Noviyanti Agus Imam Fadhillah, Annisa Maika Fadriyanti, Okmes Fadriyanti, Okmes Febriani Leni Purnamasari Ferdina, Resa Fidella, Dwi Yufika Fildzah Nurul Fajrin, Fildzah Nurul Firdaus Firdaus Firdaus Fredia Heppy, Fredia Hadi, Azmil Hamonangan, Ihut Haria Fitri Hayati, Maulida Ida Ayu Putu Sri Widnyani Intan Batura Endo Mahata Intan Mardhiyah Jaelani Iswani, Resti Kamlau, Raisha Suci Kornialia, Kornialia Kurnia Putri Ladiora, Friliyan Laveniaseda Laveniaseda Leny Sang Surya Leny Sang Surya Mayona Adisti Bastian Mia Nur Aziza Mitha ari cahaya putri MUHAMMAD HABIB Netta Anggraini Netta Anggraini Nila Kasuma Raflesia, Wikhe Baslen Ramadani, Resa Meilinda Resti Iswani Rizki Ananda Rizkiani, Erdina Wira Safitri, Subiana Hidayatul Sania Fauziah Siti Sunarintyas Sugeng Andi Purnama Sugeng Andi Purnama Sumantri, Dedi Surya, Leny Sang Widyawati Widyawati Widyawati WULANDARI Yandi, Satria Zusuan, Indriana zwespa, Ria edelwis