PENGARUH KOMBINASI POSISI FIBER TERHADAP KEKUATAN FLEKSURAL DAN KETANGGUHAN RETAK FIBER REINFORCED COMPOSITE POLYETHYLENE

• Main Author: ATMAJA, WIDYAPRAMAN DWI
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2015
• Subjects: Oral Medicine and Pathology
• Online Access: https://repository.ugm.ac.id/134709/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=77755
• Institution: Universitas Gadjah Mada

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