Report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry

Jendresen, Malcolm D.; Klooster, Judson; Phillips, Ralph W.; Schallhorn, Robert G.; Sullivan, M.Maxwell

doi:10.1016/0022-3913(87)90374-x

Cited by 4 publications

(1 citation statement)

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“…그러나 실험방법에 따른 결합강도 결과의 편차가 심하고 표준화된 실험방법이 정립되지 않음 에 따라 그 결과를 이해하는 데 어려움이 있다 19,20) . 그리고 실험실에서 측정된 결합강도를 임상에 적용하는 데 신뢰성 이 충분하지 않으며, 임상적 다양성을 예측할 수 없다는 단 점도 있다 21,22) . 그 동안 여러 연구가들에 의해 실험실 결과 사이의 비교나 in vitro와 in vivo 간의 보다 나은 상관관계 를 구명하기 위하여 결합강도의 표준화에 대해 노력하여 왔 다 19,20,23) .…”

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A study on fractural behavior of dentin-resin interface

Ryu

Choi

Park

et al. 2007

J Korean Acad Conserv Dent

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The fracture toughness test is believed as a clinically relevant method for assessing the fracture resistance of the dentinal restoratives. The objectives of this study were to measure the fracture toughness (K1C) and microtensile bond strength of dentin-resin composite interface and compare their relationship for their use in evaluation of the integrity of the dentin-resin bond.A minimum of six short-rod specimens for fracture toughness test and fifteen specimens for microtensile bond strength test was fabricated for each group of materials used. After all specimens storing for 24 hours in distilled water at 37℃, they were tensile-loaded with an EZ tester universal testing machin. Statistical analysis was performed using ANOVA and Tukey' s test at the 95% confidence level, Pearson' s coefficient was used to verify the correlation between the mean of fracture toughness and microtensile bond strength. FE-SEM was employed on fractured surface to describe the crack propagation.Fracture toughness value of Clearfil SE Bond (SE) was the highest, followed by Adper Single Bond 2 (SB), OptiBond Solo (OB), ONE-STEP PLUS (OS), ScotchBond Multi-purpose (SM) and there was significant difference between SE and other 4 groups (p < 0.05). There were, however, no significant difference among SB, OB, OS, SM (p > 0.05). Microtensile bond strength of SE was the highest, followed by SB, OB, SM, OS and OS only showed significant lower value (p < 0.05). There was no correlation between fracture toughness and microtensile bond strength values. FE-SEM examination revealed that dentin bonding agent showed different film thickness and different failure pattern according to the film thickness.From the limited results of this study, it was noted that there was statistically no correlation between K1C and μ TBS. We can conclude that for obtaining the reliability of bond strength test of dentin bonding agent, we must pay more attention to the test procedure and its profound scrutiny. [J Kor Acad Cons Dent 32(3):208-221, 2007]

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