書誌事項
- タイトル別名
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- Restoration of Composite on Etched Stainless Steel Crowns (Report 1)
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抄録
Object of investigation<BR>The retention of composite resin to etched stainless steel crowns was tested as a possible method for restoring primary anterior teeth. Method employed<BR>1) SEM observation Stainless steel crowns (Sankin Manufacture Co. ) were etched with an aqua resia to create surface roughness and undercut to retain the composite resin to the crowns. Etching times were 1,2,3,5,8,10 and 20 minutes, then washed in a 70% alcohol solution using an ultrasonic washer and dried. A total of 96etched samples and non etched control samples were observed through the scanning electron microscope (Hitachi 520).<BR>2) Shear bond strength test Stainless steel crowns were etched in an aqua resia from 1 to 20 minutes, then washed and dried. Composite resin (Photo Clearfil A, Kuraray Co. ) with the bonding agent was placed on the crowns and the shear bond strength was tested in 56 samples using an Autograph (DCS-500, Shimazu).<BR>Results<BR>1) SEM observation showed that the etching surface of stainless steel crowns created surface roughness and undercut. The most desirable surface was obtained in the 3 to 5 minute etching time specimens.<BR>2) The highest bond strength was obtained in a 3 minute etching specimen. It was 42.12 MPa, although 29.26 MPa in mean value.<BR>Conclusion<BR>Etching with an aqua resia increased the adherence of composite resin to the surface of stainless steel crowns.
収録刊行物
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- The Japanese Journal of Pediatric Dentistry
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The Japanese Journal of Pediatric Dentistry 28 (3), 630-638, 1990
The Japanese Society of Pediatric Dentistry