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All Journal Padjadjaran Journal of Dentistry Journal Of Vocational Health Studies Dental Agromedis
Yohana Maria Penga
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Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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The effect of preheating on the color stability of microhybrid composite resin after immersion in carbonated beverages and black tea: an experimental study Nugroho, Raditya; Penga, Yohana Maria; Al Ghifari, Faiq Aqil; Wulandari, Erawati; Hidayati, Lusi
Padjadjaran Journal of Dentistry Vol 36, No 3 (2024): November 2024
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol36no3.58667

Abstract

Introduction: Composite resin is commonly used in restorative dentistry due to its pleasing aesthetics. However, this material tends to experience discoloration, a vital standard reflecting the restoration’s success. Studies show that preheating is effective in maintaining the color stability of other types of composite resin; nevertheless, the effect on microhybrid composite resin is not fully understood. This study aimed to analyze the effect of preheating on the color stability of microhybrid composite resins after immersion in carbonated beverages and black tea. Method: Twenty-four Z250 shade A2 composite resin discs, each with a diameter of 7 mm and a thickness of 2 mm, were divided into four groups (n=6). While groups I and II underwent a preheating process at 68°C before being soaked in carbonated drinks and black tea, groups III and IV were prepared at room temperature (25°C) without preheating and soaked in carbonated drinks and black tea. The discoloration of the samples was determined utilizing a UV-Vis spectrophotometer according to CIEL*a*b* color space. Data were analyzed using one-way ANOVA followed by the Least Significant Difference (LSD) test. Result: Preheating increased the color stability of composite resins. Preheated composite resins experienced significantly lower discoloration than composite resins at room temperature after soaking in carbonated drinks and black tea (p<0.05). Conclusion: preheating can minimize the color change of microhybrid composite resin after immersion in carbonated beverages and black tea. 
THE EFFECT OF 50% EDAMAME BEAN (GLYCINE MAX L. MERRIL) EXTRACTS ON THE SURFACE ROUGHNESS OF HEAT-CURED ACRYLIC RESIN Lusi Hidayati; Yohana Maria Penga; Leliana Sandra Devi; Ayudia Yohanna Widya Kusumastuti
Journal of Vocational Health Studies Vol. 8 No. 3 (2025): March 2025 | JOURNAL OF VOCATIONAL HEALTH STUDIES
Publisher : Faculty of Vocational Studies, Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jvhs.V8.I3.2025.200-205

Abstract

Background: Edamame bean (Glycine max L. Merril) extract is an alternative to denture cleanser because it contains antifungal and antibacterial compounds, such as flavonoids. However, flavonoids may increase the surface roughness of heat-cured acrylic resin. Purpose: This research aims to analyze the effect of 50% edamame bean extract as a denture cleanser on the surface roughness of heat-cured acrylic resin. Method: Twenty four square shaped heat-cured acrylic resin plates of 10 x 10 x 2 mm were divided into four groups: A1, A2, B1, and B2. Each group was immersed in distilled water (A1 for four days and A2 for 11 days) and 50% edamame bean extract (B1 for four days and B2 for 11 days). The surface roughness was measured using a surface roughness tester TR 220. The data were then analyzed using the Two Way ANOVA test followed by the Tukey HSD test with a significance value of p-value < 0.05. Result: The average surface roughness in heat-cured acrylic resin increased in 50% edamame extract immersion for four and 11 days. The highest increase was experienced in 50 % edamame extract immersion for 11 days with a value of 0.158 μm. In contrast, the distilled water immersion group noted the lowest surface roughness for four days and 11 days. Conclusion: Edamame extract significantly affects the surface roughness of heat-cured acrylic resin after immersion for four and 11 days.
Inovasi Pupuk Cocopeat dan Pemberdayaan Masyarakat melalui Program KKN Kolaboratif di Desa Ranulogong Moh Amirul Hamzah; Elsa Margaretha; Nurhalisa Putri; Ika Bela Nuradinda; Dyyah Ayu Laksmy; Wanda Nirmalasari; Erika Novembriana; Diana Fajriah Kusuma Afanto; Muhammad Roziqin; Evi Puji Lestari; Umi Nurjanah; Yohana Maria Penga
Dental Agromedis Vol. 3 No. 2 (2025): November
Publisher : Fakultas Kedokteran Gigi, Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/da.v3i2.6353

Abstract

The village of Ranulogong in the Randuagung District, Lumajang, has significant agricultural potential but is constrained by low water discharge during the dry season, which often leads to crop failure. On the other hand, the abundant coconut husk waste has not been optimally utilized. This Collaborative Community Service Program (KKN) aims to design and prepare a sustainable agricultural solution model through an innovative organic fertilizer made from cocopeat (coconut coir dust) mixed with chicken manure to increase soil water retention capacity. The program's implementation methods included: 1) The development of the cocopeat fertilizer product;2) The creation of a demonstration plot (demplot) as a proof of concept; 3) The production of educational media in the form of brochures and video tutorials for independent knowledge transfer; and 4) Community service programs in education at the elementary (SD) and early childhood education (PAUD) levels. The results of the activities showed the successful development of a ready- to-implement cocopeat fertilizer product and demonstrated its potential in maintaining soil moisture through the demonstration plot. Educational media were also produced and handed over to the village as a sustainable knowledge asset. The education programs at the elementary and early childhood levels proceeded as planned and succeeded in raising awareness of the importance of continuing education and in training the creativity of young children. This program successfully developed a foundation for sustainable agricultural solutions while also empowering the educational aspects in Ranulogong village.Keywords: Cocopeat, community empowerment, KKN (Student Community Service), sustainable agriculture, children's education
Co-Authors Al Ghifari, Faiq Aqil Ayudia Yohanna Widya Kusumastuti Diana Fajriah Kusuma Afanto Dyyah Ayu Laksmy Elsa Margaretha Erawati Wulandari Erika Novembriana Evi Puji Lestari Ika Bela Nuradinda Leliana Sandra Devi Lusi Hidayati Lusi Hidayati, Lusi Moh Amirul Hamzah Muhammad Roziqin Nurhalisa Putri Raditya Nugroho, Raditya Umi Nurjanah Wanda Nirmalasari