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題 名 | Total Failure Energy of a Composite Resin Bonded to Human Enamel=一複合樹脂與人類牙釉質黏著之總破壞能量 |
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作 者 | 陳瑞松; 林俊彬; 謝季全; | 書刊名 | 臺灣醫學會雜誌 |
卷 期 | 96:2 1997.02[民86.02] |
頁 次 | 頁103-109 |
分類號 | 416.98 |
關鍵詞 | 複合樹脂; 牙釉質黏著; Total failure energy; Bond test; Composite resin; Human enamel; |
語 文 | 英文(English) |
英文摘要 | Total failure energy is defined as the energy required to stress a bond to the point of fracture. This study was designed to assess and compare the total failure energy of a resin-enamel bond with conventional tensile and shear bond strengths. A commercially available composite resin was bonded to human enamel surface. During testing, the applied load versus displacement of the load fixture was recorded and analyzed by a data acquisition system. The tensile and shear bond strengths as well as the total failure energies were calculated. The mean tensile bond strength (21.2 MPa) was higher than the mean shear bond strength (11.6 MPa). The mean total energy applied for tensile failure of the bond (2.1 kg.mm) was also higher than that for the shear failure (1.5kg.mm). There were statistically significant correlations between bond strength and total failure energy. The failure modes of the shear bond test revealed a higher frequency of adhesive failures compared to the tensile bond test. Further, a dramatic difference existed in the cohesive failure mode between tensile (cohesive composite failure) and shear (cohesive enamel failure) tests. The total failure energy, which represents the fracture strength as well as the failure process of a bond, may be considered an appropriate criterion for characterizing the failure of a bond. |
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