PENGARUH JUMLAH LAPISAN FIBER ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) PADA FIBER REINFORCED COMPOSITE TERHADAP PENYERAPAN AIR

NUR HIDAYATUL HASANAH, Dr. drg. Siti Sunarintyas, M.Kes.,

2013 | Skripsi | PENDIDIKAN DOKTER GIGI

Fiber-reinforced composite (FRC) adalah bahan yang merupakan kombinasi dari matriks polimer dan fiber. Penggunaan FRC dalam lingkungan rongga mulut menyebabkan terjadinya interaksi antara FRC dengan saliva yang sebagian besar adalah air. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan fiber UHMWPE pada FRC terhadap penyerapan air. Sampel penelitian berupa FRC yang menggunakan fiber jenis UHMWPE berbentuk braided (CONSTRUCT Kerr™, USA) dan matriks flowable composite (Master Flow BIODINAMICA, Brazil). Mengacu pada ISO 10477, digunakan ukuran sampel 2mm x 2mm x 25mm yang disinari dengan sumber sinar tampak (blue-LED, litex 695tm, Dentamerica, USA) selama 20 detik untuk setiap permukaan selebar ujung tip penyinaran. Sampel dibagi menjadi tiga kelompok perlakuan yaitu kelompok tanpa fiber (5 sampel), FRC dengan 1 lapis fiber (7 sampel) dan FRC dengan 2 lapis fiber (5 sampel). Sampel direndam dalam aquades masing-masing 10ml dengan suhu 37°C dan lama perendaman 7 hari. Penyerapan air diukur dalam satuan mg/mm3 yang terlebih dahulu diukur perubahan beratnya menggunakan neraca digital elektronik dengan ketelitian 0,01 mg (Mettler Toledo, Switzerland). Data dianalisis statistik menggunakan Kruskal- Wallis dengan signifikansi 0,05. Hasil penelitian menunjukan rerata penyerapan air dari kelompok tanpa fiber, FRC 1 lapis fiber dan FRC 2 lapis fiber secara berurutan 0,01±0,00 mg/mm3, 0,02±0,00 mg/mm3 dan 0,02±0,01 mg/mm3. Uji Kruskal-Wallis menunjukan nilai 0,12 (p>0,05), maka dapat diambil kesimpulan bahwa tidak terdapat pengaruh yang bermakna antara jumlah lapisan fiber terhadap penyerapan air pada FRC.

Fiber-reinforced composite (FRC) is a material which is combination of polymer matrix and fiber. The use of FRC in the oral cavity causing interactions between FRC with saliva which is mostly water constituent. This study aimed to determine the effect of adding layers UHMWPE fiber in FRC towards water absorption. Speciments in this research were FRC with UHMWPE fibers braided form (CONSTRUCT Kerr™, USA) and flowable composite matrix (Master Flow BIODINAMICA, Brazil). Based on ISO 10477, the sample size used were 2mm x 2mm x 25mm which were activated by visible light source (blue-LED, litex 695tm, Dentamerica, USA) for 20 secons for each surface as wide as the tip of irradiation. The speciments were divided into three treatment groups, they were group without fiber (5 speciments), FRC with 1 layer of fiber (7 speciments) and FRC with 2 layer of fiber (5 speciments). Samples were stored in distilled water of 10 ml each with a temperature of 37°C and a soaking time 7 days. Water absorption was measured in units mg/mm3 which had been measured with electronic digital weighing scales 0.01 mg accuracy (Mettler Toledo, Switzerland). Data were analyzed using the Kruskal-Wallis with 0.05 significance. The results showed the average water absorption of the group without fiber, FRC with 1 layer of fiber and FRC with 2 layer of fiber were 0.01±0.00 mg/mm3, 0.02±0.00 mg/mm3 and 0.02±0.01 mg/mm3. Kruskal-Wallis test showed the value of 0.12 (p>0.05), it can be concluded that there was no significant effect between the number of layers of fiber to water absorption at FRC

Kata Kunci : FRC, fiber UHMWPE, penyerapan air