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Effect of solvent in 1-step self-etching adhesives on degree of conversion and long-term durability

Research Project

Project/Area Number 16591904
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionHokkaido University

Principal Investigator

IKEDA Takatsumi  Hokkaido Univ., Grad. School of Dent., Inst., 大学院歯学研究科, 助手 (90222885)

Co-Investigator(Kenkyū-buntansha) TANAKA Toru  Hokkaido Univ., Grad. School of Dent., Inst., 大学院歯学研究科, 助手 (90179771)
INOUE Satoshi  Hokkaido University, Hospital, Lec., 大学病院, 講師 (80184745)
SANO Hidehiko  Hokkaido Univ., Grad. School of Dent., Prof., 大学院歯学研究科, 教授 (90205998)
SHIRAI Kenichi  Hiroshima Univ., Grad. School of Biomedical Sciences, Inst., 大学院医歯薬学総合研究科, 助手 (20325179)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsadhesive system / solvent / air-drying / tensile strength
Research Abstract

Objective. The objectives of the present study were 1) to clarify the relationship between the duration of air-drying for one-step self-etch adhesives (1-SEA) and evaporation degree (ED) of solvents, and 2) to evaluate the effect of ED on the ultimate micro-tensile strength (UTS) of the adhesives. Methods. The ED of three 1-SEA, iBond (Heraus kulzer), G-BOND (GC) and S3 BOND (kuraray), after 0, 5 and 10 sec air-drying was decided by gravimetric method. After that, the UTSs of the adhesives at ED equivalent to 0, 5 and 10 sec air-drying were evaluated. Results. EDs were increased by extension of air-drying time. As for the comparison between the adhesives, iBond showed the largest ED, and followed by G-BOND and S3 BOND. Regarding UTS, longer air-drying time resulted in larger UTS. In comparison between the adhesives, S3 BOND (HEMA containing adhesive) showed larger UTS than the other two adhesives (HEMA-free adhesives). Significance. Air-drying had a significant effect to remove solvents included in 1-SEAs and to achieve larger UTS of them. Hence, it might be crucial to remove solvents as much as possible by thorough, strong air-drying for firmly hardened adhesive layer at the interface.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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