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All Journal Jurnal Kedokteran Gigi Universitas Padjadjaran Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Supriyadi Supriyadi
University of Jember
Agriculture, Biological Sciences & Forestry Dentistry Education Health Professions Mathematics Physics Public Health Other

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The radiopacity of glass ionomer cement after addition of nHA powder: experimental study Lusi Hidayati; Supriyadi Supriyadi; Dea Azalia Annisa; Sulistiyani Sulistiyani; Raditya Nugroho; Cortino Sukotjo
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 35, No 2 (2023): Agustus 2023
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jkg.v35i2.48594

Abstract

ABSTRACTIntroduction: One of the restorative materials often used in dental restoration treatment is GIC. One type of GIC is conventional GIC. Conventional GIC has the disadvantage of having low compressive strength compared to resin-modified GIC and high viscosity. One of the efforts to improve the mechanical properties of GIC is by adding nano hydroxyapatite (nHA) which can be obtained from natural materials such as eggshells. The addition of nHA to GIC can increase the compressive strength of GIC and the addition of nHA is thought to result in a change in the radiopacity properties of GIC. The research aims to analyze the radiopacity of GIC after the addition of nano-hydroxyapatite powder. Methods: The number of samples was 24 discs with a diameter of 7 mm and a height of 3 mm which were divided into 4 group. The research group was K0 (GIC) as the control group, K1 (GIC+ 2% nHA), K2 (GIC+ 3% nHA), and K3 (GIC + 4% nHA). Radiopacity measurements were carried out using the J Image application. Results: The results of the ANOVA test was p<0.05, which means that the radiopacity values in each group had a significant difference. The average gray value of GIC without the addition of nHA (K0) was 206.5, GIC + 2% nHA (K1) was 233.0, GIC + 3% nHA (K2) was 237.8 and GIC + 4% nHA (K3) was 241.0 measured with Image J. Conclusions: The addition of nHA powder can increase the radiopacity of GIC and 4% nHA powder added to GIC has the highest radiopacity value compared to 2 and 3% nHA powder added to GIC.  .Key words radiopacity, glass ionomer, cement, nHARadiopasitas glass ionomer kaca setelah penambahan bubuk nHA: studi eksperimentalAbstrakPendahuluan: Salah satu bahan restoratif yang sering digunakan dalam perawatan restorasi gigi adalah GIC. Salah satu jenis GIC adalah GIC konvensional. GIC konvensional memiliki kekurangan yaitu kekuatan tekannya rendah dibandingkan dengan GIC yang dimodifikasi resin dan viskositas tinggi. Salah satu upaya untuk meningkatkan sifat mekanik GIC adalah dengan menambahkan nanohidroksiapatit (nHA) yang dapat diperoleh dari bahan alami seperti cangkang telur. Penambahan nHA ke GIC dapat meningkatkan kekuatan tekan GIC dan penambahan nHA diduga mempengaruhi sifat radiopasitas GIC. Penelitian ini bertujuan untuk mengetahui radiopasitas GIC setelah penambahan bubuk nanohidroksiapatit. Metode: Jumlah sampel adalah 24 cakram dengan diameter 7 mm dan tinggi 3 mm yang dibagi menjadi 4 kelompok. Kelompok penelitian ini adalah K0 (GIC) sebagai kelompok kontrol, K1 (GIC+2% nHA), K2 (GIC+3% nHA), dan K3 (GIC+4% nHA). Hasil: Hasil uji ANOVA diperoleh nilai p<0.05 yang berarti bahwa nilai radiopasitas pada setiap kelompok memiliki perbedaan yang signifikan. Rata-rata nilai gray value GIC tanpa penambahan nHA (K0) adalah 206,5, GIC + 2% nHA (K1) adalah 233,0, GIC + 3% nHA (K2) adalah 237,8 dan GIC + 4% nHA (K3) adalah 241,0. Simpulan: Penambahan bubuk nHA dapat meningkatkan radiopasitas GIC dan 4% bubuk nHA yang ditambahkan ke GIC memiliki nilai radiopasitas tertinggi dibandingkan dengan 2 dan 3% bubuk nHA yang ditambahkan ke GIC.Kata kunciradiopasitas, semen, glass  ionomer, nanohidroksiapatit
Investigation of Potentially Hazardous Landslides Using Geolectric Resistivity Methods and Internal Friction Angle in The Sentool Plantation, Panti-Jember Nurul Priyantari; Nadya Putri Elsa Amanda; Agus Suprianto; Supriyadi Supriyadi
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 6 No. 3 (2026): Lambda
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v6i3.4488

Abstract

The Sentool plantation is situated on the slopes of Mt. Argopuro in Suci Village, Panti District, Jember Regency. This area, previously abandoned, has been transformed into a thriving coffee plantation. Flash floods and landslides in Panti District in 2006 and landslides in the Sentool Plantation in 2015 prompted a study of the subsurface structure, particularly concerning soil types and their stability towards landslide potency. This study combines in situ method using geoelectric resistivity and laboratory tests, including plasticity index (PI) and soil gradation tests. Geoelectric resistivity data acquisition was conducted on two lines using a Wenner-Schlumberger array, with a length of 150 m and a spacing of 5 m. Soil samples were taken at Line 2, namely at a distance of 40 m as sample 1 and 120 m as sample 2. Field research results using the Wenner-Schlumberger array of geoelectric resistivity method on Lines 1 and 2 in the Sentool Plantation show that the subsurface structure is dominated by silty clay and silty soils with resistivity (11.8 – 93.4) ?m and there are several intercalations of sand, gravel, or bedrock with higher resistivity. The plasticity index test results for sample 1 with a PI of 10.45% and sample 2 with a PI of 13.68% show that the soil layers are composed of silty clay silt with moderate plastic. The soil gradation analysis results also indicate that both soil samples are fine-grained (possibly silt) with grain sizes <0.075 mm. Both laboratory test results validate the geoelectric resistivity field research results, which show the dominance of clay soil with a reference internal friction angle (?) of 25° - 30°. The Sentool Plantation research area is characterized by silty clay soils, which may influence subsurface conditions relevant to landslide vulnerability.
Co-Authors Agus Suprianto Cortino Sukotjo Dea Azalia Annisa Lusi Hidayati Nadya Putri Elsa Amanda Nurul Priyantari Raditya Nugroho Sulistiyani Sulistiyani