Fatigue Strengths of Particulate Filler Composites Reinforced with Fibers

Abstract

The aim of this study was to evaluate the dynamic fatigue strengths at 105 cycles and the strains of particulate filler composite resins with and without reinforcing fibers. An UHMWPE (Ribbond), a polyaromatic polyamide fiber (Fibreflex), and three glass fibers (GlasSpan, FibreKor, Vectris Frame) were used to reinforce the particulate filler composite resins.The fatigue properties were measured in three-point bending mode using a servohydraulic universal testing machine at a frequency of 5Hz, until failure occurred or 105 cycles had been completed. The fatigue strengths at 105 cycles were determined by the staircase method. The fractured aspects of specimens were evaluated by an optical and scanning electron microscope. The fatigue strengths of particulate filler composite resins were 49-57MPa, and those of fiber-reinforced were 90-209MPa. Unidirectional glass fibers showed higher reinforcing effects on the fatigue strengths of composite resins. The strain of UHMWPE-reinforced composite was largest.

Reinforcing effects of different fibers on denture base resin based on the fiber type, concentration, and combination

“…Unidirectional fibers located perpendicular to the midline of the denture would be useful to prevent midline fractures of the dentures through flexural loading. In spite of this, there have been studies reporting the limitations of unidirectional fibers in three point bending tests, because the load can be applied in only one direction with the universal testing machine, while multi-directional forces are applied on the filling materials or on the fixed partial dentures within the mouth 23,32) . However, a denture within the mouth is a good model where a flexural load is mainly applied because the patients are instructed to avoid biting with the incisors of the dentures and to do chopping movements with their posterior teeth as much as possible during mastication.…”

Three-dimensional finite element analysis of posterior fiber-reinforced composite fixed partial denture Part 2: influence of fiber reinforcement on mesial and distal connectors

“…As with any prosthetic devices, the materials used for fabricating FPDs play a pivotal role in determining the success rate and longevity of these dental restorations. In the case of FRC FPDs, numerous studies were carried out to examine the FRC material from different perspectives: mechanical properties [7][8][9][10] , material development in terms of flexural strength 11) , biocompatibility 12) , fatigue analysis 13,14) , structural analysis in terms of stress distribution 15,16) , and optimal design of FRC framework to obtain the maximum reinforcement effect for FPD 17,18) . Despite the much that is already known about the material properties of FRC framework and particulate-filled composite veneer through the numerous laboratory and clinical studies, much remains to be known about the mechanical behavior of FRC FPDs with respect to displacement and stress magnitude and distribution pattern which were induced during functional loading.…”

Flexural properties of three kinds of experimental fiber-reinforced composite posts

“…FRC is a composite material with embedded fibers within a resin matrix 13) . The fibers used in FRC are primarily glass, quartz, carbon, polyaromatic polyamide (aramid), and ultra high molecular weight polyethylene (UHMWP) 14) .…”

“…UHMWP fibers have been investigated as a reinforcement element of dentures, fixed orthodontic retainers, space maintainers, post-traumatic stabilizing splints, fixed partial dentures, and direct use as posts [17][18][19][20] . The mechanical properties of FRC are dependent upon: (1) the component, architecture (unidirectional, bidirectional, or woven), and geometric orientation of the fibers, (2) the component of the resin matrix, (3) the ratio of fiber to resin matrix, and (4) the adhesion between the fibers and resin matrix 13,[21][22][23] . The resin matrix used in FRC posts are either epoxy resin or other polymers having a high degree of conversion and a highly cross-linked structure 24) .…”