Int J Stomatol

Inter J Stomatol ›› 2011, Vol. 38 ›› Issue (6): 632-635.doi: 10.3969/j.issn.1673-5749.2011.06.003

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Study on fracture resistance of six kinds reinforced epoxy resin die

Zhang Wen1,2, Zheng Meihua2, Zhang Qingyuan1, Wei Peiling2, Zhong Zhihai2.   

  1. 1. Dept. of Stomatology, The Second Hospital of Traditional Chinese Medicine of Guangdong Province, Guangzhou 510095, China; 2. Dept. of Stomatology, Sun Yat-Sen Memorial Hospital,Sun Yat-Sen University, Guangzhou 510120, China
  • Received:2010-09-20 Revised:2011-08-30 Online:2011-11-20 Published:2011-11-20

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Abstract:

Objective To compare the fracture strength of six kinds reinforced epoxy resin dies. Methods Six kinds of epoxy resin dies were prepared: Epoxy resin EP-400（dieⅠ）, epoxy resin EP-400+20% 120 grit quartz sand（dieⅡ）, epoxy resin EP-400+glass fiber（5 dipping bundles, die Ⅲ）, epoxy resin EP-400+graphite carbon fiber（2 dipping bundles, die Ⅳ）, epoxy resin EP-400+graphite carbon fiber（5 dipping bundles, die Ⅴ）, epoxy resin EP-400+graphite carbon fiber（5 dry bundles, die Ⅵ）. All dies were loaded until failure using the WD-5A universal testing machine. Any difference among groups was tested for significance with One-Way ANOVA. Results It was ascendent for the fracture strength of die and Ⅱ, die Ⅲ and Ⅳ, die Ⅴand Ⅵ（P＜0.001）. There were statistical differences（P＜0.05） between any two kinds dies except for dieⅠ and Ⅱ, die Ⅲ and Ⅳ, die Ⅴand Ⅵ（P＞0.05）. Die Ⅴ showed best properties in six kinds dies by scanning electron microscope. Conclusion The epoxy resin die reinforced with graphite carbon fiber（5 dipping bundles） has excellent properties of fracture resistance and it can meet the needs of fracture testing of various crowns and fixed partial denture in vitro study.

Key words: graphite carbon fiber, epoxy resin, die, fracture resistance


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