Recovery of Adhesive Strength Redused by Bonding between Dentin Surface Treated with NaOCl and 4-META Resin Cement. Application of Ultrasonic Cleaning for Improving Infiltration of Neutralizer.

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  • Kurashige Hisanori
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Minami Hiroyuki
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Komuta Mari
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Ohashi Hirofumi
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Kimura Takahiro
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Minesaki Yoshito
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Onizuka Tadashi
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School
  • Tanaka Takuo
    The 1st Department of Prosthetic Dentistry, Kagoshima University, Dental School

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Other Title
  • ＮａＯＣｌ処理による４‐ＭＥＴＡレジンの象牙質接着強さ低下を防止する研究　　中和用薬剤の浸透に超音波処理を応用する方法
  • Application of Ultrasonic Cleaning for Improving Infiltration of Neutralizer
  • 中和用薬剤の浸透に超音波処理を応用する方法

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Abstract

Bacterial infection to the dentin surface of the prepared teeth is considered to be one of the important factors that cause pulpal inflammation or secondary caries. NaOCl solution is used as a disinfectant, but the application of the NaOCl solution to dentin surface is known to markedly decrease the adhesive strength of 4-META/MMA-TBBO resin cement to dentin.<BR>The purpose of this study was to find a way to recover the adhesive strength of 4-META/MMA-TBBO resin cement to dentin after reduction by sterilization with the NaOCl solution.<BR>After sterilization with the NaOCl solution, three solutions, 3% hydrogen peroxide, 5% sodiumthiosulfate, and 5% ascorbic acid, were used to neutralize the remaining Na0Cl, but the recovery of adhesive strength was 20-50% in comparison with only etching treatment.<BR>In case of the neutralization with both the solutions and ultrasonic cleaning, the adhesive strength recovered approximate to that of only etching treatment.

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