PENGARUH KOMBINASI POSISI FIBER TERHADAP KEKUATAN FLEKSURAL DAN KETANGGUHAN RETAK FIBER REINFORCED COMPOSITE POLYETHYLENE
DRG. WIDYAPRAMAN DWI ATMAJA, Prof. Dr. drg. Widjijono, S.U.
2015 | Tesis | S2 Ilmu Kedokteran GigiKehilangan gigi akibat karies, trauma, kondisi sistemik dan penyakit periodontal, dapat menyebabkan gangguan fungsional terutama pada saat digunakan untuk pengunyahan. Restorasi gigi tiruan cekat (GTC) secara direct yang menggunakan material komposit dengan penguatan fiber sering disebut sebagai fiber reinforced composite (FRC). UHMWPE merupakan non-impregnated polyethylene fiber yang mempunyai kekuatan fleksural lebih baik dari Pre-impregnated glass fiber. Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi posisi fiber terhadap kekuatan fleksural dan ketangguhan retak (fracture toughness) FRC UHMWPE. Penelitian ini merupakan jenis penelitian eksperimental laboratoris. Bahan penelitian menggunakan fiber Polyethylene (Construct, Kerr, USA) lebar 2mm, resin komposit flowable (3M ESPE, USA), silane (3M ESPETMSil, Germany). Sampel dalam penelitian ini adalah batang polyethylene fiber reinforced composite (FRC) dengan ukuran 2 x 2 x 25 mm terbagi dalam 3 kelompok kombinasi posisi fiber. Kelompok pertama adalah kombinasi posisi compression – neutral, kelompok kedua posisi neutral – tension dan kelompok ketiga posisi compression – tension dengan jumlah total sampel adalah 18. Sampel FRC diuji dengan menggunakan universal testing machine untuk mengetahui kekuatan fleksural (Mpa) dan ketangguhan retak/fracture toughness (MPa-m1/2). Perbedaan pengaruh diukur menggunakan analisis data Anova 1 jalur dan LSD (p<0,05). Hasil uji statistik pada sampel FRC menunjukkan terdapat pengaruh perbedaan yang bermakna pada semua sampel yang diuji p=0,00. Sampel batang polyethylene fiber reinforced composite (FRC) dengan kombinasi posisi compression – tension memiliki kekuatan fleksural 189 MPa dan ketangguhan retak 91,08 MPa-m1/2 tertinggi dibandingkan dengan kelompok sampel yang lainnya. Terdapat pengaruh perbedaan kombinasi posisi fiber polyethylene pada sampel FRC UHMWPE terhadap kekuatan fleksural dan ketangguhan retak (fracture toughness). Berdasarkan hasil uji sampel tersebut dapat dikatakan bahwa kombinasi posisi fiber compression - tension pada aplikasi gigi tiruan cekat (GTC) dapat memberikan kekuatan fleksural 189 Mpa yang optimal dan mendekati rerata tekanan pengunyahan sebesar 193 Mpa. Kata kunci: fiber reinforced composite (FRC), UHMWPE, kekuatan fleksural, ketangguhan retak (fracture toughness), kombinasi posisi fiber
Loss of teeth due to caries, trauma, systemic conditions and periodontal disease, can caused functional impairment, especially when used for mastication. Restoration fixed denture (GTC) were direct the used of composite materials with fiber reinforcement was often referred to as fiber- reinforced composite (FRC). UHMWPE was a non - impregnated polyethylene fiber that has a flexural strength better than the pre - impregnated glass fiber. This study aims to determine the effect of a combination of fiber position on flexural strength and fracture toughness FRC UHMWPE . This study was an experimental research laboratory. Materials research used Polyethylene fiber (Construct, Kerr, USA) 2mm width, flowable composite resin (3M ESPE, USA), silane (3M ESPETMSil, Germany). The sample in this study were the polyethylene fiber reinforced composite (FRC) with size 2 x 2 x 25 mm divided into 3 groups combination of fiber position. The first group were a combination of compression position - neutral, the second group neutral position - the third group tension and compression position - tension with the total number of samples were 18. FRC samples were tested using a universal testing machine to determine the flexural strength (MPa) and fracture toughness (MPa - m1/2). The difference in effect was measured using data analysis Anova 1 track and LSD (p < 0.05). The results of statistical tested on samples FRC showed that there were significant differences in the effect of all tested samples p = 0.00. Samples polyethylene fiber reinforced composite (FRC) with a combination of compression position - tension has a flexural strength of 189 MPa and a fracture toughness of 91.08 MPa - m1/2 the highest compared with other samples. There were the effect of different combinations of polyethylene fiber position at FRC samples of UHMWPE against flexural strength and fracture toughness. Based on the test results of these samples can be said that the combination of fiber position compression - tension on the application of fixed denture (GTC) can provide flexural strength of 189 MPa and approaching the average optimal masticatory pressure of 193 MPa . Keywords: fiber reinforced composite (FRC), UHMWPE, flexural strength, fracture toughness, the combination of fiber position
Kata Kunci : fiber reinforced composite (FRC), UHMWPE, kekuatan fleksural, ketangguhan retak (fracture toughness), kombinasi posisi fiber; fiber reinforced composite (FRC), UHMWPE, flexural strength, fracture toughness, the combination of fiber position