Gigi tiruan lepasan yang kotor dapat menjadi tempat melekatnya mikroorganisme. Jika tidak dilakukan pembersihan rutin, maka akan dapat menimbulkan penyakit seperti denture stomatitis yang disebabkan oleh jamur Candida albicans. Perasan murni bawang putih diketahui memiliki kandungan allicin yang dapat menghambat pertumbuhan Candida albicans. Hal tersebut membuat peneliti ingin mengetahui pengaruh lama perendaman bahan basis gigi tiruan akrilik dalam perasan murni bawang putih 50% terhadap jumlah koloni Candida albicans. Jenis penelitian ini merupakan penelitian laboratorium eksperimen dengan rancangan control group post test only. Kelompok sampel terdiri dari dua, kelompok perlakuan direndam dalam perasan murni bawang putih 50% dan kelompok kontrol direndam dalam aquades steril. Setiap kelompok dibagi berdasarkan lama waktu perendaman. Uji analisis yang digunakan ialah uji t test dan dilanjutkan dengan LSD. Hasil penelitian ini diperoleh rata-rata koloni Candida albicans setelah perendaman dalam
Background: Metal ceramic restoration (MCR) is a gold standard due to its ability to withstand masticatory forces and aesthetics. However, it frequently appears to experience a fracture in the oral cavity. The ceramics in MCR consist of an opaque dentin and enamel layer, which contain silica to give the ceramic strength. Silica is an abundant material, mainly synthesized from rice husks. The study was aimed to investigate the effect of silica added to commercially opaque porcelain powder in increasing the flexural strength of MCR.
Methods: The research sample was rectangular Co-Cr metal [(25±1) mm × (3±0.1) mm × (0.5 ± 0.05) mm], and opaque porcelain powder and dentin [(8±0.1) mm× (3±0.1) mm ×(1.1±0.1) mm]. White silica powder was synthesized from rice husk by sonication for 270 minutes, characterized by x-ray fluorescence (XRF). Silica was mixed with commercial opaque porcelain powder with various concentrations of 0, 0.5, and 1%, porcelain coating procedure on the centre of the surface metal, followed by sintering at 9500C.
Results: Characterization with XRF showed that the elemental content of pure silica was 83.9%. The average flexural strength value with three-point bending in each sample is 109.67±12.163; 131.26±3.817; and 108.35±4.26. The results of statistical tests using One Way ANOVA stated a significant increase in the flexural strength of MCR (p<0.05) post added the rice husk silica to the commercial opaque porcelain powder.
Conclusion: Adding 0.5% silica resulted in the optimal flexural strength of MCR.
Intoduction : PMMA or acrylic resin is a necessary material in dentistry for denture bases, one of which is often used is heat cured acrylic resin or heat polymerized acrylic resin. Garlic juice is a denture cleaner to inhibit bacteria and is also an extrinsic factor that causes discoloration.
Purpose: To determine the duration of immersion in pure garlic juice which can cause discoloration of the acrylic resin.
Methods: laboratory experiments with posttest only control group design research.
Results: The mean ± SD change in color of hot polymerized acrylic resin after immersing in garlic juice for 2, 4, 6, 8 hours was 0.67 ± 0.22; 0.91 ± 0.31; 1.22 ± 0.32; and 1.56 ± 0.25.
Conclusion: There is an effect of soaking time with garlic juice on the base of denture acrylic resin on discoloration.
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