aBstraKFRC banyak digunakkan dalam kedoketeran gigi khususnya untuk bridge konstruksi. E glass fiber sering digunakan karna memiliki sifat yang baik dan berikatan baik dengan polimer. Di Indonesia E-glass terbatas dengan harga cukup mahal. Glass fiber non dental banyak tersedia di Indonesia dengan harga terjangkau. Tujuan penelitian ini adalah mengetahui pengaruh orientasi glass fiber non dental pada kekuatan transversa pada gigi FRC. Bahan yang digunakan dalam penelitian ini adalah glass fiber non dental (HJ, China), flowable komposit (CharmFil Flow, DenKist, Korea), Silane coupling agent (Monobond S, Ivoclar Vivadent, Liechtenstein) dan Aquades. Subjek dibagi dalam 2 kelompok. Specimen direndam dalam air selama 24 jam dan 7 hari. Data dianalisis dengan Independent sample T-test. Hasil T-test menunjukkan perbedaan kekuatan transversa dengan 24 jam air perendaman yang signifikan antara dua kelompok orientasi (p< 0,05). Data dari 7 hari perendaman tidak ada perbdaan statistik antara kelompok (p> 0,05). Kesimpulan: ada perbedaan kekuatan transversa antara roving dan woven roving orientasi di gigi FRC.Kata Kunci: Fiber reinforced composite; Glass fiber non dental; Kekuatan transversa; Orientasi fiber. aBstraCt FRC is widely used in dentistry especially for dental bridges construction. E glass fiber is commonly used because it has good properties and good bonding with polymers. Its availability is limited and its price quite expensive in Indonesia.Non dental glass fiber is available in Indonesia with lower price. The aim of this research was to evaluate the effect of non dental glass fiber orientation on transverse strength of dental FRC. Non dental glass fiber (HJ, China)
This study aimed to identify anti-bacterial compounds consisted of the ethyl acetate fraction of Aspergillus sp extracted from the root of Rhizophora mucronata. The sample of Aspergillus sp cultivated from mangrove located in West Sumatera province. Each culture isolated was macerated in the ethyl acetate and analyzed using GC-MS instrumentation. The GC-MS spectra indicated fifteen compounds including isoindole derivative, organic acids (3 compounds), organic acid ester (4 compounds), acetate derivative, acetone derivative, alcohol derivatives (3 compounds) and naphthalene derivative. Among the identified compounds,
Background: One of the efforts to prevent adhesion and biofilm colonization on the material surface is to improve its properties by using Titanium dioxide (TiO₂) nanoparticles. TiO₂ nanoparticles have antimicrobial properties, especially against the fungus Candida albicans as it has photocatalytic properties that can inhibit the growth of the fungal colonies. The present study aimed to determine the effect of applying TiO₂ to polyurethane plates on the growth of Candida albicans fungal biofilms.Methods: This study applied a laboratory experimental design. The subjects were divided into two groups which included the treatment and control groups. In the treatment group, there were two treatments consisting of the addition of TiO₂ filler (1%, 2%, 3%, and 4%) and the material surface coating group with TiO₂ (1%, 2%, 3%, and 4%). Candida albicans was cultured and grown to form biofilms on polyurethane plates in each group.Results: The results of the statistical analysis obtained through Welch's One Way Anova showed that there was a significant difference in the number of Candida albicans colonies between the treatment and control groups (P<0.05). Treatment with 4% TiO₂ surface coating showed the lowest number of Candida albicans colonies.Conclusions: Coating the surface of the material with TiO₂ on a polyurethane plate was able to inhibit the formation of Candida albicans biofilms.
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