Impact strength of denture polymethyl methacrylate reinforced with different forms of E-glass fibers

Abstract

The impact strength of PMMA was enhanced by including E-glass fibers, increasing parallel with the fiber concentration.

The Effect of Polymerization Methods and Fiber Types on the Mechanical Behavior of Fiber‐Reinforced Resin‐Based Composites

“…Furthermore, several reports suggested that multidirectional E‐glass fiber cannot be recommended in combination with the resin‐based composites . A previous study showed that that the direction of glass fibers is a very important point on fiber‐reinforced polymer and also suggested woven fiber did not reinforce the denture base PMMA . In addition, Krenschel's factor was introduced in several studies to determine the effectiveness of fiber reinforcement, and woven fiber was found less effective than unidirectional fiber …”

Effects of coating with different ceromers on the impact strength, transverse strength and elastic modulus of polymethyl methacrylate

“…To overcome the less-than-ideal physical and mechanical properties of PMMA denture base material, various reinforcing methods involving the addition of materials have been proposed, such as metal strengtheners, carbon graphite fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, glass fibers, polystyrene, and urethane dimethacrylate 2,4,5,8) . These reinforcing agents are also less than ideal with their own share of pros and cons, such as difficulty in polishing, bad esthetic quality, and complicated processes 5,8) .…”

“…Denture fractures are commonly caused by an accident (impact failure) or by small forces imposed during mastication (flexural failure) 5) . For maxillary dentures, most fractures are caused by a combination of fatigue and impact stresses; for mandibular dentures, 80% of fractures are caused by impact stress 2,6) . Flexural failure of denture base materials is the primary mode of clinical failures and stems from the development of microscopic cracks in fatigue stress areas 7) .…”

“…PMMA is widely used as a denture base material due to the desirable properties of biocompatibility in the oral environment, esthetically appealing appearance, ease of handling and processing, and low cost [2][3][4] . However, it has some disadvantages such as susceptibility to denture fractures, poor wear resistance, insufficient surface hardness, and low flexural strength 3,4) .…”

“…Flexural failure of denture base materials is the primary mode of clinical failures and stems from the development of microscopic cracks in fatigue stress areas 7) . Key tests to evaluate and compare the mechanical properties of denture base materials are the flexural and the impact strength tests 2,5) . Many approaches have been used to strengthen PMMA, in a bid to improve its mechanical properties and overcome the abovementioned limitations [1][2][3][4][5][6][7][8] .…”