Effect of fiber reinforcement on impact strength of heat polymerized polymethyl methacrylate denture base resin:in vitrostudy and SEM analysis

Abstract

PURPOSEThe aim of this in-vitro investigation was to describe the effect of reinforcement with different fibers on impact strength of heat polymerized polymethyl methacrylate (PMMA) denture base resin and to analyze the effect of surface treatment of the fibers on the impact strength.MATERIALS AND METHODSThe specimens were fabricated from the dies formed as per standard ASTM D4812. 2% by weight of glass, polyethylene and polypropylene fibers were incorporated in the PMMA resin. The Izod impact testing was performed on the unnotched specimens and the values obtained were analyzed using appropriate one way ANOVA, followed by unpaired t-test. Fractured ends of the samples were subjected to the SEM analysis.RESULTSThe polypropylene fibers with plasma treatment showed the highest impact strength (9.229 × 102 J/m) followed by the plasma treated polyethylene fibers (9.096 × 102 J/m), untreated polypropylene fibers (8.697 × 102 J/m), untreated polyethylene fibers (7.580 × 102 J/m), silane treated glass fibers (6.448 × 102 J/m) and untreated glass fibers (5.764 × 102 J/m). Also the surface treatment of all the fibers has shown the significant improvement in impact strength. Findings of the SEM analysis justified the improvement in impact strength after surface treatment.CONCLUSIONReinforcement with the fiber is an effective method to increase the impact strength of PMMA denture base resin. The surface treatment of fibers further increases the impact strength significantly.

Effect of Thermocycling and Polyethylene Fibre Addition on Impact and Transversal Strength of Heat Cured Acrylic Resin Denture Base Material

“…19,20 A study by Johnston et al showed that 68% of acrylic resin denture manufacture broke in a few years mainly because of impact strength. 21 The weakness of transversal strength happen because of denture base tense while mastication which trigger crack. 11,16,17,20 Effect Of Thermocycling And Polyethylene Fibre Addition On Impact And ….…”

“…[16][17][18] A few fibre types reported can increase mechanical properties such as glass, polyethylene, silica, polycarbonate, carbon (graphite), sapphire, ceramic, nylon, and aramyde (polyamides polyaromatic). 8,9,11,20,21 The most commonly used fibre as acrylic resin denture base reinforcing material is polyethylene fibre. Polyethlylene fibre has several profitable properties such as easy to manipulate, biocompatible, natural colours, bond well with resin matrix and good aesthetic.…”

Effect of Premolar Extraction on Overall Bolton Ratio in Class II Malocclusion in RSGM FKG USU

“…One of the mechanical properties of heat-polymerized polymethyl methacrylate is its impact strength [1]. The fractures of acrylic resin denture base after several years of usage were 68% due to its impact strength [3].…”

Investigation Of Transverse Strength And Surface Roughness Of Different Ratio Of Polypropylene Fiber İn Acrylic Resins

“…9,10 Ayrıca farklı sektörlerde asfalt ve beton karışımlarının içlerine katılarak mekanik özelliklerini geliştirmede de kullanılmaktadır.…”

“…9,10 Çalışmamızın amacı ısı ile polimerize olan kaide materyalini kuvvetlendirmek için farklı oranlarda ilave edilen polipropilen fiberin akriliğin transvers direnç ve yüzey pürüzlülüğü üzerine etkisini araştırmaktır. Çalışmamızda, polipropilen ilaveli ısı ile polimerize olan PMMA rezinin transvers direnci ve yüzey pürüzlülüğü değerleri arttıracağı hipotezi test edilmektedir.…”