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Heribertus Dedy Kusuma Yulianto
Universitas Gadjah Mada
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering Mechanical Engineering

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Uji komparasi desinfektan septalkan, terralin, dan alkohol 70% terhadap daya sterilisasi permukaan kursi dental Arif Andriyanto; Risma Dwi Irfanto; Heribertus Dedy Kusuma Yulianto
Jurnal Teknosains Vol 12, No 2 (2023): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.79820

Abstract

Cross-infection has the potential to occur in the Dental and Oral Hospital due to cross-transmission of pathogenic microbes through dental chair surfaces that are contaminated with microbes. This  study aims to compare the effectiveness of three types of disinfectant Septalcan, Terralin, and 70% alcohol on the inhibition of pathogenic microbes originating from the oral cavity of patients who contaminate the surface of dental chairs in aerosol and non-aerosol clinics. Sampling of microorganisms was carried out using the technique of wiping/swab the surface of dental chairs in aerosol and non-aerosol clinics before and after the disinfection process with three types of disinfectants. The decrease in the number of germs before and after the disinfectant process is used as a parameter for the effectiveness of the disinfectant. The results of the one-way ANOVA statistical test shows that there is no significant difference in the effectiveness of the three types of Septalcan, Terralin, and 70% alcohol in reducing the number of germs on the surface of dental chairs. The three types of disinfectants are able to minimize the risk of cross-infection due to pathogenic microbial contamination on the surface of the dental chair.
Surface roughness and topography on denture base material fabricated with additive manufacturing techniques Abizar Agung Wibawa; Budi Arifvianto; Rini Dharmastiti; Heribertus Dedy Kusuma Yulianto; Dibyo Pramono
Jurnal Teknosains Vol 15, No 2 (2026): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.116126

Abstract

Denture fabrication plays an important role in restoring oral functions, including mastication, speech, and esthetics, while also helping to prevent temporomandibular joint disorders. Conventional denture bases are commonly fabricated using heat-cured acrylic resin; however, this method still presents several limitations, including longer fabrication time, lower accuracy, and outcomes that are highly dependent on operator performance. The development of additive manufacturing technology offers several advantages, such as high reproducibility, improved accuracy in producing complex geometries, a more efficient digital workflow, and reduced material waste. This study investigated the effect of additive manufacturing using digital light processing (DLP) on the surface roughness and topography of denture bases fabricated with different printing layer thicknesses (50 μm and 100 μm), compared with conventional heat-cured acrylic resin bases. Disc-shaped samples with a diameter of 5 mm and a thickness of 2 mm were analyzed for surface roughness using a profilometer along a 2 mm straight line, while surface topography was observed using scanning electron microscopy (SEM). The results showed significant differences in surface roughness among the groups, where the additive manufacturing group with a 50 μm layer thickness exhibited the smoothest surface (0.96±0.26 μm), followed by the conventional heat-cured group (1.75±0.31 μm), while the additive manufacturing group with a 100 μm layer thickness showed the highest roughness value (4.27±0.55 μm). SEM analysis also revealed crater-like surface defects correlated with variations in layer thickness. These defects were observed more frequently in the additive manufacturing group with a 100 μm layer thickness compared with the 50 μm layer thickness group. These findings confirm the importance of additive manufacturing parameters in determining the final properties of denture bases and indicate the potential for optimizing fabrication techniques to achieve improved denture outcomes.
Co-Authors Abizar Agung Wibawa Arif Andriyanto Budi Arifvianto Dibyo Pramono Rini Dharmastiti Risma Dwi Irfanto