Resin Composite Bond Strength to Different Cavity Walls

• YOSHIKAWA Takako

  Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University

• WATTANAWONGPITAK Nipaporn

  Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University

• TAGAMI Junji

  Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University:Global Center of Excellence (GCOE) Program; International Research Center for Molecular Science in Tooth and Bone Diseases

Bibliographic Information

Other Title

• 窩洞内各面に対するコンポジットレジンの接着強さ

Abstract

The purpose of this study was to evaluate the influence of cavity wall on resin composite bond strength to dentin using two adhesive systems. The occlusal enamel of human molars was ground to expose a flat dentin surface and finished with carbide paper. Box-form occlusal cavities measuring 3 mm wide, 5 mm long and 2 mm deep (C-factor=3.1) were prepared on the flat dentin surfaces of human molars. Each specimen was restored with one of two self-etching adhesive systems: Clearfil Mega Bond (Kuraray Medical) or Clearfil Tri-S Bond (Kuraray Medical), followed by bulk filling using Z100 resin composite (3M ESPE). After light-curing at 600 mW/cm² for 40 s, teeth were stored in the dark for 24 hours in water maintained at 37℃. A specimen was cut perpendicular to the cavity floor and cavity wall to obtain beams having cross-sectional areas of approximately 0.9 mm², and the micro-tensile bond strength (μTBS, MPa) was determined. Data (n=10) were analyzed using Tukey's test. Clearfil Mega Bond showed higher bond strength to both the cavity floor and cavity wall compared with Clearfil Tri-S Bond (p<0.05). There was no significant difference in bonding between cavity floor and cavity wall when using Clearfil Mega Bond (p>0.05). Resin composite bond strength to the cavity floor was lower than that to the cavity wall using Clearfil Tri-S Bond (p<0.05). The bond strength of resin composite to the dentin varied at different sites of the cavity and was influenced by the adhesive system used.

Journal

• The Japanese Journal of Conservative Dentistry

  The Japanese Journal of Conservative Dentistry 55 (1), 97-102, 2012

  The Japanese Society of Conservative Dentistry

Keywords

• Resin composite
• Cavity wall
• Bond strength

Details

• CRID: 1390282680499389440
• NII Article ID: 110009479986
• NII Book ID: AN00191201
• DOI: 10.11471/shikahozon.55.97
• ISSN: 21880808
• ISSN: 03872343
• Web Site: https://search.jamas.or.jp/link/ui/2012178505
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed