STRENGTH OF GLASS FIBER REINFORCED PMMA RESIN AND SURFACE ROUGHNESS CHANGE AFTER ABRASION TEST

  • Lee, Sang-Il (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Kim, Chang-Whe (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Lim, Young-Jun (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Kim, Myung-Joo (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Yun, Suk-Dae (Department of Prosthodontics, Graduate School, Seoul National University)
  • Published : 2007.06.30

Abstract

Statement of the problem. The fracture of acrylic resin dentures remains an unsolved problem. Therefore, many investigations have been performed and various approaches to strengthening acrylic resin, for example, the reinforcement of heat-cured acrylic resin using glass fibers, have been suggested over the years. But problems such as poor workability, rough surface, poor adhesion of glass fiber resin complex are not solved yet. Purpose. The aim of the present study was to investigate the effect of short glass fibers on the transverse strength of heat-polymerized denture base acrylic resin and roughness of resin complex after abrasion test. Material and methods. To avoid fiber bunching and achieve even fiber distribution, glass fiber bundles were mixed with acrylic resin powder in conventional mixer with a non-cutting blade, to produce the glass fiber($10{\mu}m$ diameter, 3mm length, silane treated) resin composite. Glass fibers were incorporated at 0%, 3%, 6% and 9% by weight. Transverse strength were measured. After abrasion test, surface roughness was evaluated and scanning electron microscope view was taken for clinical application. Results. 1. 6% and 9% incorporation of 3mm glass fibers in the acrylic resin enhanced the transverse strength of the test specimens(p<0.05). 2. Before abrasion test, incorporation of 0%, 3%, 9% glass fiber in the resin showed no dirrerence in roughness statisticaly(p>0.05). 3. After abrasion test, incorporation of 0%, 3%, 6% glass fiber in the resin showed same surface roughness value statistically(p>0.05). 4. In SEM, surface roughness increased as the percentage of the fibers increased. 5. In the areas where glass fiber bunchings are formated, a remarkably high roughness was noticed. Conclusion. 6% and 9% addition of silane-treated short glass fibers into denture base acrylic resin increased transverse strength significantly. Before and after abrasion test, incorporation of 0%, 3%, 6% glass fiber in the resin showed same surface roughness value statistically.

References

  1. Kelly E. Fatigue failure in denture base polymers. J Prosthet Dent 1969:21 :257-66 https://doi.org/10.1016/0022-3913(69)90289-3
  2. Hargreaves AS. The prevalence of fractured dentures. A survey. Br Dent J 1969:126:451-55
  3. Yazdanie N, Mahood M. Carbon fiber acrylic resin composite: An investigation of transverse strength. J Prosthet Dent 1985:54:543-47 https://doi.org/10.1016/0022-3913(85)90431-7
  4. DeBoer J, Vermilyea SG, Brady RE. The effect of carbon fiber orientation on the fatigue resistance and bending properties of two denture resins. J Prosthet Dent 1984:51:119-21 https://doi.org/10.1016/S0022-3913(84)80117-1
  5. Kilfoil BM, Hesby RA, Pelleu GB. The tensile strength of a composite resin reinforced with carbon fibers. J Prosthet Dent 1983:50:40-3 https://doi.org/10.1016/0022-3913(83)90163-4
  6. Malquarti G, Berruet RG, Bois D. Prosthetic use of carbon fiber-reinforced epoxy resin for esthetic crowns and fixed partial dentures. J Prosthet Dent 1990:63:251 -7 https://doi.org/10.1016/0022-3913(90)90190-N
  7. Sehajpal SB, Sood VK. Effect of metal fillers of some physical properties of acrylic resins. J Prosthet Dent 1989:61:746-51 https://doi.org/10.1016/S0022-3913(89)80055-1
  8. Berrong JM, Weed RM, Young JM. Fracture resistance of Kevlar-reinforced poly(methyl methacrylate)resin : A Preliminary Study. Int J Prosthodont 1990:3:391-5
  9. Mullarky RH. Aramid fiber reinforcement of acrylic appliances. J Clin Orthod 1985:19:655-8
  10. Pourdeyhimi B, Robinson HH, Schwartz P, Wagner HD. Fracture toughness ofkevlar 29/poly(methylmethacrylate) composite materials for surgical implantations. Ann Biomed Eng 1986:14:277-94 https://doi.org/10.1007/BF02584275
  11. Chow TW, Cheng YY, Ladizesky NH. Polyethylene fIbre reinforced poly(methylmethacrylate) -water sorption and dimensional changes during immersion. J Dent 1993:21:367-72 https://doi.org/10.1016/0300-5712(93)90014-H
  12. Braden M, Ladizesky NH. Denture base poly(methyl methacrylate) reinforced with ultra-high modulus poiyethyiene fibres. Br Dent J 1998:164:109-13
  13. Ladizesky NH, Chow TW. Reinforcement of complete denture bases with continuous high performance polyethylene fibers. J Prosthet Dent 1992:68:934-9 https://doi.org/10.1016/0022-3913(92)90554-N
  14. Ladizesky NH, Cheng YY, Chow TW, Ward IM. Acrylic resin reinforced with chopped high performance polyethylene fiber-properties and denture construction. Dent Mater 1993:9:128-35 https://doi.org/10.1016/0109-5641(93)90089-9
  15. Gutteridge DL. Reinforcement of poly(methyl methacrylate) with ultra-high-mcdulus polyethylene fibre. J Dent 1992:20:50-4 https://doi.org/10.1016/0300-5712(92)90012-2
  16. Williamson DL, Boyer DB, Aquilino SA, Leary JM. Effect of polyethylene fIber reinforcement on the strength of denture base resins polymerized by microwave energy. J Prosthet Dent 1994:72:635-8 https://doi.org/10.1016/0022-3913(94)90296-8
  17. Solnit GS. The effect of methylmethacrylate reinforcement with silane-treated and untreated glass fibers. J Prosthet Dent 1991:66:310-4 https://doi.org/10.1016/0022-3913(91)90255-U
  18. Vallitu PK. Acrylic resin-fIber composite-part 2: The effect of polymerization shrinkage of polymethyl methacrylate applied to fiber roving on transverse strength. J Prosthet Dent 1994:71:613-7 https://doi.org/10.1016/0022-3913(94)90447-2
  19. Gutteridge DL. The effect of including ultra-high modulus polyethylene fIbre on the impact strength of acrylic resin. Br Dent J 1998:164:177-80
  20. Goldberg AJ, Burstone CJ. The use of continuous fiber reinforcement in dentistry. Dent Mater 1992:8: 197-202 https://doi.org/10.1016/0109-5641(92)90083-O
  21. Clark HA, Pluedemann EP. Bonding of silane coupling agents in glass-reinforced plastics. Modern plastics 1963:June:133-8
  22. International standard ISO 1567, ed 3. 1999(E) 02-15