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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제5권 제2호
- 발행연도
- 2013.1
- 수록면
- 153 - 160 (8page)
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초록· 키워드
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PURPOSE. This in vitro study intended to investigate the mechanical and thermal characteristics of Valplast, and of polymethyl methacrylate denture base resin in which different esthetic fibers (E-glass, nylon 6 or nylon 6.6) were added. MATERIALS AND METHODS. Five groups were formed: control (PMMA), PMMA-E glass, PMMAnylon 6, PMMA-nylon 6.6 and Valplast resin. For the transverse strength test the specimens were prepared in accordance with ANSI/ADA specification No.12, and for the impact test ASTM D-256 standard were used. With the intent to evaluate the properties of transverse strength, the three-point bending (n=7) test instrument (Lloyd NK5, Lloyd Instruments Ltd, Fareham Hampshire, UK) was used at 5 mm/min. A Dynatup 9250 HV (Instron, UK) device was employed for the impact strength (n=7). All of the resin samples were tested by using thermo-mechanical analysis (Shimadzu TMA 50, Shimadzu, Japan). The data were analyzed by Kruskal-Wallis and Tukey tests for pairwise comparisons of the groups at the 0.05 level of significance. RESULTS. In all mechanical tests, the highest values were observed in Valplast group (transverse strength: 117.22 ± 37.80 MPa, maximum deflection: 27.55 ± 1.48 mm, impact strength: 0.76 ± 0.03 kN). Upon examining the thermo-mechanical analysis data, it was seen that the E value of the control sample was 8.08 MPa, higher than that of the all other samples.
CONCLUSION. Although Valplast denture material has good mechanical strength, its elastic modulus is not high enough to meet the standard of PMMA materials.
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참고문헌 (26)
참고문헌 신청
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Boztug A / 2006 / Preparation of compatible blends of poly(methyl metacrylate) used in dentistry with a reactive terpolymer containing maleic anhydride and their thermomecha
Chen SY / 2001 / Reinforcement of acrylic denture base resin by incorporation of various fibers / J Biomed Mater Res 58 : 203 ~ 208
Dogan OM / 2007 / The effect of esthetic fibers on impact resistance of a conventional heat-cured denture base resin / Dent Mater J 26 : 232 ~ 239
Gutteridge DL / 1988 / The effect ofincluding ultra-high-modulus polyethylene fibre on the impact strength of acrylic resin / Br Dent J 164 : 177 ~ 180
Boztug A / 2006 / Preparation of compatible blends of poly(methyl metacrylate) used in dentistry with a reactive terpolymer containing maleic anhydride and their thermomecha
Chen SY / 2001 / Reinforcement of acrylic denture base resin by incorporation of various fibers / J Biomed Mater Res 58 : 203 ~ 208
Dogan OM / 2007 / The effect of esthetic fibers on impact resistance of a conventional heat-cured denture base resin / Dent Mater J 26 : 232 ~ 239
Gutteridge DL / 1988 / The effect ofincluding ultra-high-modulus polyethylene fibre on the impact strength of acrylic resin / Br Dent J 164 : 177 ~ 180
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