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http://dx.doi.org/10.4047/jkap.2011.49.1.8

A study on the shear bond strength between Co-Cr denture base and relining materials  

Lee, Na-Young (Department of Dentistry, College of Medicine, Hanyang University)
Kim, Doo-Yong (Department of Dentistry, College of Medicine, Hanyang University)
Lee, Young-Soo (Department of Dentistry, College of Medicine, Hanyang University)
Park, Won-Hee (Department of Dentistry, College of Medicine, Hanyang University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.49, no.1, 2011 , pp. 8-15 More about this Journal
Abstract
Purpose: This study evaluated the bonding strength of direct relining resin to Co-Cr denture base material according to surface treatment and immersion time. Materials and methods: In this study, Co-Cr alloy was used in hexagon shape. Each specimen was cut in flat surface, and sandblasted with $110\;{\mu}m$ $Al_2O_3$ for 1 minute. 54 specimens were divided into 3 groups; group A-control group, group B-applied with surface primer A, group C-applied with surface primer B. Self curing direct resin was used for this study. Each group was subdivided into another 3 groups according to the immersion time. After the wetting storage, shear bond strength of the specimens were measured with universal testing machine. The data were analyzed using two-way analysis of variance and Tukey post hoc method. Results: In experiment of sandblasting specimens, surface roughness of the alloy was the highest after 1 minute sandblasting. In experiment of testing shear bond strength, bonding strength was lowered on group B, C, A. There were significant differences between 3 groups. According to period, Bonding strength was the highest on 0 week storage group, and the weakest on 2 week storage group. But there were no significant differences between 3 periods. According to group and period, bonding strength of all group were lowered according to immersion time but there were no significant differences on group B and group C, but there was significant difference according to immersion time on group A. Conclusion: It is useful to sandblast and adopt metal primers when relining Co-Cr metal base dentures in chair-side.
Keywords
Metal denture base; Direct relining; Metal primer; Shear bond strength;
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Times Cited By KSCI : 1  (Citation Analysis)
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