The Effect of Dentin Location on Composite Bond Strength to Dentin

• 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

• コンポジットレジンの接着強さに及ぼす象牙細管の影響

Abstract

The purpose of this study was to evaluate the effect of dentinal tubule orientation on resin composite bond strength to floor and wall using various adhesive systems. Box-form occlusal cavities measuring 3 mm wide, 5 mm long, and 2 mm deep were prepared on flat dentin surfaces of human molars. The walls of the cavities were then removed to make flat dentin floors and walls for bonding. Each specimen was restored with one of two adhesives: Clearfil Mega Bond (Kuraray Medical) or Single Bond (3M ESPE), followed by build-up 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 parallel to the floor or wall to obtain approximately 0.9 mm² beams. The microtensile bond strength (μTBS, MPa) to the flat dentin floor or wall specimen was determined. Data (n=11) were analyzed using Bonferroni's test. The bond strength of Clearfil Mega Bond to the dentin wall group showed the highest bond strength among all groups. Clearfil Mega Bond and Single Bond showed significantly higher μTBS to dentin wall compared with that of the dentin floor group (p<0.05). Bonding to dentin floor and wall was affected by dentin location and dentin tubule orientation.

Journal

• The Japanese Journal of Conservative Dentistry

  The Japanese Journal of Conservative Dentistry 55 (1), 103-108, 2012

  The Japanese Society of Conservative Dentistry

Keywords

• Resin composite
• Dentin location
• Dentinal tubule orientation
• Bond strength

Details

• CRID: 1390001205522677888
• NII Article ID: 110009479987
• NII Book ID: AN00191201
• DOI: 10.11471/shikahozon.55.103
• ISSN: 21880808
• ISSN: 03872343
• Web Site: https://search.jamas.or.jp/link/ui/2012178506
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed