PENGARUH PENAMBAHAN PERSENTASE BERAT FIBER E-GLASSTERHADAP PENYERAPAN AIR PADA BAHAN FIBER REINFORCED COMPOSITE

NYAYU WULAN TRI UTAMI, Dr.drg.Siti Sunarintyas,M.Kes

2014 | Skripsi | PENDIDIKAN DOKTER GIGI

Fiber reinforced composite (FRC) merupakan material kombinasi antara matrik polimer dan fiber penguat. Bahan ini banyak dikembangkan di bidang kedokteran gigi karena mendukung konsep minimal invasive. Fiber reinforced composite (FRC) yang digunakan di dalam rongga mulut akan menyebabakan bahan tersebut berinteraksi dengan saliva yang sebagian besar mengandung air. Penelitian ini betujuan untuk mengetahu pengaruh penambahan persentase berat fiber e-glass terhadap penyerapan air pada bahan FRC. Sampel yang digunakan dalam penelitian menggunakan matrik flowable composite (Master Flow BIODINAMICA, Brazil) dan fiber E-glass (R338- 2400/V/P, Stick Tech Ltd., Turku, Finland). Ukuran sampel yang digunakan yaitu 2mm x 2mmx 25mm yang disinari dengan sumber sinar tampak (blue-LED, litex 695tm, Dentamerica, USA) selama 20 detik. Pada penelitian ini terdapat tiga kelompok perlakuan yaitu kelompok resin komposit tanpa fiber (3 sampel), kelompok FRC dengan fiber E-glass 38% (3 sampel) dan kelompok FRC dengan fiber E-glass 76% (3 sampel). Sampel direndam dalam aquades (10 ml) selama 7 hari dengan suhu 370C. Penyerapan air diukur dengan satuan persentase (%). Pengukuran berat sampel menggunakan neraca digital dengan ketelitian 0,1mg. Hasil dianalisis menggunakan ANAVA satu jalur dilanjutkan uji Post Hoc dengan LSD (Least Significant Different). Hasil penelitian menunjukkan rerata penyerapan air untuk kelompok resin komposit tanpa fiber, kelompok FRC dengan fiber E-glass 38% dan kelompok FRC dengan fiber E-glass 76% secara berurutan 0,885 ± 0,07 %, 0,462 ± 0,06 % dan 435 ± 0,15 %. Kesimpulan penelitian ini adalah terdapat pengaruh yang signifikaan pada penambahan persentase berat fiber E-glass terhadap penyerapan air pada bahan FRC (p<0,05).

Fiber reinforced composite (FRC) is a combination of material between the polymer matrix and fiber. There is great interest in development of FRC in dentistry because support the concept of minimally invasive. Fiber reinforced composite (FRC) are used inte oral cavity causing the material will interact with saliva which is mostly water constituent. This study aimed to determine the effect of adding weight percentage of E-glass fiber towards water absorption in FRC. Samples in this research used flowable matrix composite (Master Flow BIODINAMICA, Brazil) dan E-glass fibers (R338-2400/V/P, Stick Tech Ltd., Turku, Finland). The sample size used were 2mm x 2mmx 25mm which were activated by visible light source (blue-LED , litex 695tm, Dentamerica, USA) for 20 seconds. There were three groups, they were resin composite without fiber (3 samples), FRC with E-glass fiber 38% (3 samples), and FRC with E-glass fiber 76% (3 samples). Samples were stored in distilled water (10 ml) for 7 days with a temperature of 370C. Water absorption was measured in percentage (%). Measurement of samples weight used electronic digital weighing scales 0,1mg accuracy. The result were analyzed statistically with One Way ANOVA, continued by Post Hoc Test using Least Significant Different (LSD). The result showed the average water absorption of the group resin composite without fiber, FRC with E-glass fiber 38% and FRC with E-glass fiber 76% were 0.885 ± 0.07 %, 0.462 ± 0.06 % and 0.435 ± 0.15 %, respectively. The conclusion of this study was there was significant effect between adding weight percentage of E-glass fiber to water absorption in FRC (p<0,05).

Kata Kunci : FRC, fiber E-glass, penyerapan air