Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

An Effect of Aging and Thermocycling on the Tensile Strength of Restorative Composite Resins

시효와 열순환 처리가 수복용 복합레진의 인장강도에 미치는 영향

  • Lee, Mi-Jeong (Department of Conservative Dentistry & Institute for Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Yu, Mi-Kyung (Department of Conservative Dentistry & Institute for Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Lee, Kwang-Won (Department of Conservative Dentistry & Institute for Oral Bioscience, School of Dentistry, Chonbuk National University)
  • 이미정 (전북대학교 치과대학 치과보존학교실 및 구강생체과학연구소) ;
  • 유미경 (전북대학교 치과대학 치과보존학교실 및 구강생체과학연구소) ;
  • 이광원 (전북대학교 치과대학 치과보존학교실 및 구강생체과학연구소)
  • Published : 2005.06.30
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Abstract

The purpose of this study was to evaluate effect of aging and thermocycling on the tensile strength of restorative composite resins. Eight commercially available light-cured restorative composites (Heliomolar: HM, Palfique Estelite: PE, Spectrum: ST, UniFil-F: UF, Z100: ZH, Clearfil AP-X: CA, P60: PS, and Palfique Toughwell: PT) were selected as experimental materials. Rectangular-shaped tensile test specimens were fabricated in a teflon mold giving 5 mm in gauge length and 2 mm in thickness. All samples were stored in distilled water at $37^{\circ}C$ for 100 days. Every 10 days, specimens were thermocycled for 1,000 cycles with 15 seconds of dwelling time in each $5^{\circ}C$ and $55^{\circ}C$ water baths. Tensile testing was carried out at a crosshead speed of 0.5 mm/min and fracture surfaces were observed with a scanning electron microscope. The results obtained were summarized as follows; 1. The strength degradation of thermocycled group was severer than that of the aged group (P<0.01). 2. The tensile strength of the CA and ST groups were significantly higher than that of other groups after thermocycling treatment (P<0.05). 3. Fracture surfaces showed that the composite resin failure developed along the matrix and the filler/resin interface region.

Keywords

References

  1. Soderholm KJ. Degradation of glass filler in experimental composites. J Dent Res 60:1867-1875, 1981 https://doi.org/10.1177/00220345810600110701
  2. Indrani DJ, Cook WD, Televantos F, Tyas MJ, Harcout JK. Fracture toughness of water-aged composite restorative materials. Dent Mater 11:201-207, 1995 https://doi.org/10.1016/0109-5641(95)80019-0
  3. Bae TS, Kim TJ, Kim HS. Effect of Immersion in water and thermal cycling on the mechanical properties of light-cured composite resins. J KOSOMBE 17:327-335, 1996
  4. Arikawa H, Kuwahata H, Seki H, Kanie T, FujiiK, Inoue K. Deterioration of Mechanical properties of composite resins. Dent Mater J 14:78-83, 1995 https://doi.org/10.4012/dmj.14.78
  5. Yamamoto M, Takahashi. Tensile fatigue strength of light cure composite resins for posterior teeth. Dent Mater J 14:175-184, 1995 https://doi.org/10.4012/dmj.14.175
  6. Asmussen E, JOrgensen KD. Fatigue strength of some resinous materials. J Dent Res 90:76-79, 1982
  7. Roulet JF. Degradation of dental polymers: 1st ed New York: Karger, pp60-160, 1987
  8. Drummond JL. Cyclic fatigue of composite restorative materials. J Oral Rehabil 16:509-520, 1989 https://doi.org/10.1111/j.1365-2842.1989.tb01372.x
  9. Miyazaki T, Fujisima A, Suzuki E, Miyaji T. Tensile strength of posterior restorative composite resins. J J Dent Mater J 5:685-693, 1986
  10. Fujisima A, Miyazaki T, Kuneshita H, Suzuki E, Miyaji T. The direct tensile test of composite resins using the small specimen -Effect of the preparation of specimen, the size of specimen and the testing condition on the tensile properties- J J Dent Mater 9:728-733, 1990
  11. Ban S, Haserawa J, Anusavice KJ. Effect of loading conditions on bi-axial flexure strength of dental cements. Dent Mater 8:100-104, 1992 https://doi.org/10.1016/0109-5641(92)90063-I
  12. Chen TM, Brauer GM. Solvent effects on bonding organosilane to silica surfaces. J Dent Res 61:1439-1443, 1982 https://doi.org/10.1177/00220345820610121301
  13. Kamel IL, Neri GA. Radiation modified filler for dental restorative composities. J Math Phys Chem 14:603-611, 1979
  14. Mair LH, Vowel R. The effect of thermal cycling on the fracture toughness of seven composite restorative materials. Dent Mater 5:23-26, 1989 https://doi.org/10.1016/0109-5641(89)90087-0
  15. Troung VT, Tyas MJ. Prediction of in vivo wear in posterior composite resins : A fracture mechanics approach. Dent Mater 4:318-327, 1988 https://doi.org/10.1016/S0109-5641(88)80044-7
  16. Bascom WD. The surface chemistry of moisture induced composite failure. In : Interface chemistry in polymer Matrix Composites. vol 6(ed Pluddenmann EP), Academic Press, New York 79, 1974