• Title/Summary/Keyword: 화학 결합

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Chemical compatibility of interim material and bonding agent on shear bond strength (임시수복 재료와 본딩제의 화학적 호환성이 전단결합강도에 미치는 영향)

  • Lee, Jonghyuk
    • Journal of Dental Rehabilitation and Applied Science
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    • v.32 no.4
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    • pp.293-300
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    • 2016

  • Purpose: The purpose of this study is finding proper bonding agents to be used when adding bis-acryl composite provisional materials. Materials and Methods: Three bonding agents with different chemical compositions were included in this study. Forty disk shaped specimens of bis-acryl composite provisional material were prepared and divided into 4 groups according to the bonding agents. Control group didn't have bonding agent. Through the Teflon mould with 4.0 mm diameter hole with 4.0 mm thickness the same bis-acryl composite provisional material was added on the disks after the surface of each specimen was treated with designated bonding agent according to the manufacturer's instructions. Shear bond test was performed and the fractured surfaces were inspected with a microscope. One-way analysis of variance was conducted and the result was further analysed with Turkey post hoc test at the significance level of 0.05. Results: The highest strength was acquired from the specimens bonded with chemical cure system and it was statistically significant (P < 0.05). This group showed 100% cohesive failures. The lowest bonding strength was recorded from the specimens used conventional light cure bonding agent, and this group's result was similar with the control group. The group used a light cure bonding agent claiming improved compatibility revealed significantly higher bond strength to the traditional light cure bonding agent group in a statistically significant way (P = 0.043). Conclusion: According to the bonding agent used the shear bond strength was significantly affected. Therefore the choice of proper bonding agent is important when hiring a bonding agent to add bis-acryl composite provisional materials.

  • https://doi.org/10.14368/jdras.2016.32.4.293 인용 PDF

Fourier Transform Infrared Spectroscopic Studies of Hydrothermal Illites (열수변질 기원 일라이트의 FTIR 연구)

  • 추창오;김수진
    • Journal of the Mineralogical Society of Korea
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    • v.13 no.1
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    • pp.37-43
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    • 2000

  • Fourier transform 적외선 분광기를 사용하여 원적외선 (<200 cm-1) 영역과 중간적외선 (400-4000 cm-1) 영역에서 열수기원 일라이트의 층간 결합상태와 화학조성간의 관계를 해석하였다. 중간 적외선 영역에서는 2M1 다형의 Al-O-Al 및 Al-O-Si 결합이 1Md 형의 것보다 강한 것으로 나타났다. 원적외선 영역에서는 세 종류의 K-O 결합이 111-114, 135-143 및 167-168 cm-1에서 인지되었다. 2M1과 1Md 다형간의 가장 큰 차이는 2M1형의 층간결합이 1Md형보다 상대적으로 강하여 K가 층간에 보다 강하게 결합되어 있다는 점이며, 두 다형의 층간결합의 상태는 서로 상이하다. K-Oinner band는 (OH) stretching band의 진동수가 높을수록 커지며, (OH) stretching band는 팔면체의 양이온 (Fe+Mg)의 함량에도 영향을 받는 것으로 나타났다.

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