• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1998 Fiscal Year Final Research Report Summary

Effect of Miniaturized Dumbbell-Shaped Specimen to Identify Bonding of Bovine Dentin

Research Project

Project/Area Number 08457503
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionTokyo Medical and Dental University

Principal Investigator

NAKABAYASHI Nobuo  Tokyo Medical and Dental University, Institutefor Medical and Dental Engineering, Professor, 医用器材研究所, 教授 (30014020)

Co-Investigator(Kenkyū-buntansha) IWASAKI Yasuhiko  Tokyo Medical and Dental University, Institutefor Medical and Dental Engineering, 医用器材研究所, 助教授 (90280990)
WATANABE Akihko  Tokyo Medical and Dental University, Institutefor Medical and Dental Engineering, 医用器材研究所, 助手 (30126263)
ISHIHARA Kazuhiko  The University of Tokyo, Department of Materials Science Graduate School of Engi, 大学院・工学系研究科, 助教授 (90193341)
Project Period (FY) 1996 – 1998
KeywordsDental Materials / adhesive resin cements / Dentin / Tensile Test / Hybridized Dentin / Dumbbell-Shaped specimens / Adhesion / Medical Materials
Research Abstract

A reliable method for bonding resin to dentin was proposed. The procedure described hybridization of dentin substrates by impregnation and polymerization of adhesive monomers therein, creating a 'hybridized dentin' or 'hybrid layer. Often, applied adhesive monomers do not fully penetrate the acid-conditioned substrate, and a zone of demineralized dentin that is not resin-impregnated is left sandwiched between the hybridized dentin and the unaltered underlying mineralized dentin. An unfilled zone of the demineralized dentin causes defects in bonded dentin. It was very difficult to examine the presence of the defect at the base of the hybrid layer was not understood when the amount of [strength of unfilled zone] x [the area] was larger than the resin or bond strength. Thus, the results of conventional tensile bond strength measurement have often been misinterpreted. The defects in the bonded dentin were investigated by soaking the specimens in water to decrease the strength of collagen b … More y the hydrolysis. However, it takes a long time to ascertain whether the dentin bond is excellent or not. These results persuaded us to develop a method to measure tensile bond strength on specimens which have the same cross-section at the bonded area. Dumbbell-shaped dentin bonded specimens must be a good candidate as dumbbell specimens are generally used to measure tensile strength of materials.
It was reported that the defects in bonded bovine dentin were formed when the dentin was treated with an aqueous solution of 10% citric acid/3% ferric chloride for 10 sec. The defects were observed in using dumbbell specimens, but not in conversional specimens.
It was also clear that defective dentin bond is not so good even when cohesive failure in resin was observed by the conventional test. When adhesive monomers more fully impregnated the entire region of demineralized dentin, the quality of the dentin bond was excellent. We will continue to develop such bonding systems to provide stable adhesion without defects by using dumbbell specimens. Less

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] G.Kato: "Effect of phosphoric acid concentration on wet-bonding to etched dentin" Dent Mater. 12. 250-255 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nakabayashi: "Bonding to Intact Dentin" J Dent Res. 75(9). 1706-1715 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] G.Gunaroso: "Preparation of an effective light-cured bonding agent for orthodontic application" Dent Mater. 13(1). 7-12 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 荒尾 武文: "午歯ダンベル型接着試料を用いた引張試験の長所" 歯科材料・器械. 16(3). 175-181 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Anthony J.Maniglia: "A new adhesive bonding material for the cementation of implantable devices in otologic surgery" The American Journal of Otology. 18. 322-327 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nakabayashi: "A tensile test to facilitate identification of defects in clentine bonded specimens" J Dentistry. 26(4). 379-385 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ogiso M,Nakabayashi N,Matsumoto T,Yamamura M,Lee RR.: "Adhesive improvement of the mechanical properties of a dense HA-cemented Ti dental implant." J.Biomed.Mater.Res.30. 109-16 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Isobe M,Yamazaki, Oida S,Ishihara K,Nakabayashi N,Amagasa T.: "Bone morphogenetic protein encapsulated with a biocompatible polymer" J.Biomed.Mater.Res.32. 433-8 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kato G, Nakabayashi N.: "Effect of phosphoric acid concentration on wet-bonding to etched dentin" Dent Mater. 12. 250-5 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakabayashi N,Saimi Y.: "Bondin to Intact Dentin" J Dent Res. 75 (9). 1706-15 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Lee R R,Ogiso M,Watanabe A,Ishihara K.: "Examination of hydroxyapatite filld 4-META/MMA-TBBA adhesive bone cement in In Vitro In Vivo environment" J.Biomed. Mater, Res.38 (1). 11-6 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Gunarso G,Nakabayashi N.: "Preparetion of a n effective ligft-cured bonding agent for orthodontic application" Dent Mater. 13 (1). 7-12 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Maniglia A J,Nakabayashi N,Paparella M M,Werning J W.: "A new adhesive bonding material for the cementation of implantable devices in otologic surgery" The American Journal of Otology. 18. 322-7 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nakabayashi N,Watanabe A,Arao T.: "A tensile test to facilitate identificationn of defects in dentine bonded specimens" J Dentistry. 26 (4). 379-85 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-12-08  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi