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KMID : 0362220130400030223
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Journal of The Korean Research Society for Dental Materials
2013 Volume.40 No. 3 p.223 ~ p.234
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Effect of height of titanium link on the retention of zirconia abutment in the titaniumzirconia bicomponent abutments
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Shin Hong-Soo
Her Soo-Bok
Seok Soo-Hwang
Lee Yoo-Mee
Lim Bum-Soon
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Abstract
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The aim of present study was to evaluate the effects of link height and dental cements on the retention force between titanium link and zirconia abutment in the Ti-Zr bicomponent abutment system. Three different height (2.0, 2.5 and 3.0 mm with 0o taper) of titanium links (MonoDent, Korea) were machined and pertinent zirconia abutments (Acucera, Korea) were fabricated with CAD/CAM. One hundred thirty five titanium links and zirconia abutments were prepared. Zirconia abutments were cemented on their respective titanium links with three different types of dental cements, such as zinc phosphate (Fleck’s), resin-modified glass ionomer (RMGI, RelyX Luting 2), self-adhesive resin cement (RelyX U200). Specimens were stored in deionized water (37°C) for 24 hours until testing. Pull-off test was performed using a universal testing machine (Instron 4466, USA) with a crosshead speed of 1 mm/min. Fifteen specimens were tested at each experimental group. The data were analyzed using t-test and Newman-Keuls multiple comparisons test (p=0.05). RMGI showed the lowest retention force (p<0.05) and ZPC showed similar retention force with resin cement (p>0.05) regardless of link heights. For ZPC groups and self-adhesive resin cement groups, 3.0 mm height showed significantly higher retention force than both 2.5 mm and 2.0 mm groups which were not significantly different (p>0.05). For RMGI groups, the retention force increased significantly with increasing of link height (p<0.05). To obtain the proper retention in clinical situation, height of titanium link should be no less than 3.0 mm.
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KEYWORD
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titanium abutment link, zirconia abutment, surface area, height, retention force
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