Dentin adaptation of resin composite restoration to cavities prepared with Er,Cr:YSGG laser

DOI 1 Citations 38 References
  • SUZUKI Masaya
    Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata
  • TAIRA Yoshihisa
    Comprehensive Dental Care, The Nippon Dental University Niigata Hospital
  • KATO Chikage
    Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata
  • KATOH Yoshiroh
    Emeritus Professor, The Nippon Dental University
  • SHINKAI Koichi
    Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata

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Other Title
  • Er,Cr:YSGG レーザー切削窩洞におけるコンポジットレジ ン修復の象牙質窩壁適合性

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Abstract

This study evaluated the dentin adaptation of resin composite restoration to cavities prepared with an Er,Cr:YSGG laser. Bowl-type cavities (3 mm in diameter, 2 mm deep) were prepared on the buccal and lingual surfaces of extracted human molars using an Er,Cr:YSGG laser (Waterlase MD, Groups 1 to 6) or an air-turbine handpiece (Control). Each cavity was treated with bonding agent (Mega Bond/Bond: MBB, Group 1); self-etching primer (Mega Bond/Primer: MBP) and MBB (Group 2 and Control); phosphoric acid (K-etchant Gel: KEG), MBP and MBB (Group 3); sodium hypochlorite (AD Gel: ADG), KEG, MBP and MBB (Group 4); all-in-one adhesive (tri-S Bond: TSB, Group 5); and ADG, KEG and TSB (Group 6) (n=10). After each bonding procedure, all cavities were restored with a resin composite. The specimens were subjected to thermal stresses consisting of 500 cycles between 5°C and 55°C. Each cavity was sectioned longitudinally using a diamond saw. The cut surfaces were dyed with a caries detector to visualize gap formation in the cavity. The ratio of dye penetration (%, means ± SD) in the dentin was 81.6 ± 13.9 for Group 1, 15.7 ± 11.4 for Group 2, 7.1 ± 9.9* for Group 3, 5.8 ± 8.0* for Group 4, 66.5 ± 18.8 for Group 5, 15.6 ± 16.1* for Group 6 and 1.4 ± 2.2* for the Control (*: p<0.05). Pre-conditioning using phosphoric acid and sodium hypochlorite effectively improved the cavity adaptation of resin composite in cavities prepared using the Er,Cr:YSGG laser.

Journal

  • Adhesive Dentistry

    Adhesive Dentistry 30 (4), 145-151, 2012

    Japan Society for Adhesive Dentistry

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