White spot lesion merupakan porositas-porositas di bawah permukaan email yang disebabkan oleh proses demineralisasi. Proses ini dapat terjadi karena adanya efek samping iatrogenik dari perawatan ortodontik melalui akumulai plak dalam jangka waktu yang lama disertai kebersihan mulut yang buruk. Tujuan penulisan laporan kasus ini adalah menerangkan penatalaksanaan white spot lesion setelah perawatan ortodontik dengan teknik resin infiltration. Laporan kasus: Seorang pasien perempuan usia 23 tahun datang ke RSGM UNPAD dengan keluhan terdapat bercak-bercak putih pada permukaan labial seluruh gigi rahang atas setelah pelepasan alat ortodontik cekat selama 2 tahun perawatan. Pasien merasa terganggu secara estetik. Berdasarkan pemeriksaan objektif dan radiologi gigi-gigi normal dengan pulpa vital, sehingga didiagnosis white spot lesions. Perawatan yang dilakukan adalah resin infiltration. Sebelum dan sesudah aplikasi dilakukan evaluasi. Resin infiltration digambarkan sebagai teknik minimal invasive yang mengisi, memperkuat, dan menstabilkan email yang terdemineralisasi tanpa membuang struktur jaringan gigi yang sehat dan menghindari dilakukan restorasi. Prinsipnya menutupi poros email dengan membuat mikroporositas melalui difusi asam klorida 15% selanjutnya dikeringkan dan diaplikasikan resin type TEGDMA (Tri-Ethylene Glycol Dimethacrylate) dengan viskositas rendah. Simpulan: Perawatan minimal invasive dengan teknik resin infiltration memperlihatkan hasil yang estetik untuk mengatasi white spot lesion setelah perawatan ortodontik. Kata kunci: White spot lesions, perawatan ortodontik, resin infiltration. Management of white spot lesion after orthodontic treatment with resin infiltration technique
Bagasse is the solid waste derived from the sugar-making process. A large amount of silica in bagasse is a potential source of silica. In this study, extraction of silica from bagasse was carried out in the following steps: pretreatment of bagasse using HCl solution, followed by calcination at varying temperatures (700 oC, 800 oC, and 900 ℃) using a furnace. Furthermore, extraction using NaOH solution and precipitation using HCl. Silica characteristics were obtained using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Electron Dispersive Spectrometry (SEM-EDS), and BET surface area. The results showed that calcination temperature affected the characteristics of the silica produced. The silica extracted at 700℃ produced an amorphous phase with a broad peak at an angle of 2θ = 20-24°. It contained the most considerable silica content and surface area, 42.46% and 796.89 cm2/g, respectively. The extracted silica had an average diameter of 5.67 mm and a pore volume of 1.184 cm3/g.
In this research, chitosan copolymer synthesis with acrylamide has been carried out by varying weight of chitosan and acrylamide, namely 2:3, 3:2 and 1:1 using a microwave oven. The copolymers characterization was carried out using FTIR, XRD, SEM and TGA/DTA. The results of the synthesis of chitosan copolymer with acrylamide were obtained the largest percentage of grafting at a ratio of 2:3. From the results of FTIR analysis showed that the copolymer had been successfully synthesized. XRD analysis showed that the copolymers synthesized have amorphous properties compared to chitosan. The results of SEM analysis, the copolymers had a porous structure. Thermal analysis showed that the copolymers have better thermal stability than chitosan. The swelling ability of the CA23 copolymer was higher than that of the CA32 and CA11 copolymers. The chitosan-acrylamide copolymer which was synthesized in a ratio of 2:3 has better properties
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