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DEVELOPMENT OF ARTIFICIAL TENDON AND LIGAMENT BY FUNCTIONAL DESIGN OF POLYMER SURFACE

Research Project

Project/Area Number 06557085
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Orthopaedic surgery
Research InstitutionNARA MEDICAL UNIVERSITY

Principal Investigator

TAMAI Susumu  MEDICINE FACULTY NARA MEDICAL UNIVERSITY PROFESSOR, 医学部, 教授 (10075088)

Co-Investigator(Kenkyū-buntansha) OHGUSHI Hajime  MEDICINE FACULTY NARA MEDICAL UNIVERSITY ASSISTANT PROFESSOR, 医学部, 講師 (80213669)
TAKAKURA Yoshinori  MEDICINE FACULTY NARA MEDICAL UNIVERSITY ASSOCIATED PROFESSOR, 医学部, 助教授 (40094578)
IKADA Yoshito  RESEARCH CENTER FOR BIOMEDICAL ENGINEERING,KYOTO UNIVERSITY PROFESSOR, 生体医療工学研究センター, 教授 (00025909)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥16,200,000 (Direct Cost: ¥16,200,000)
Fiscal Year 1996: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1994: ¥10,000,000 (Direct Cost: ¥10,000,000)
Keywordspolymer / bone bonding / hydroxyapatite / 骨結合 / 表面グラフト重合 / 生体材料 / 表面改質
Research Abstract

・ We have found calcium phosphate was rapidly deposited in the form of hydroxyapatite (HA) crysralline thin layrs onto the polymer substrate, having phosphate graft chains from the supersaturated solution. Interfacial bonding between the deposited HA layr and the polymer substrate was achieved by the grafted chains. Solubility of the deposited HA layr in aqueous medium was reduced by the increase in the crystallinity of HA deposits.
・ As an in vivo study, a phosphate-containing polymer was covalently immobilized onto a polyethylene (PE) rod and a poly (ethylene terephthalate) (PET) thread. Significant enhancement was observed for direct contact of the implant surface with a newly formed bone both for the grafted only and the further HA-deposited PE rods in comparison with the untreated PE at 4 to 6 weeks after implantation. The rats implanted with the PET thread in the femur were sacrificed 3 and 6 weeks after implantation. Statistically significant differences were observed for the unt … More reated vs. the grafted+HA-deposited at 6 weeks after implantation. These results suggest that the phosphate polymer chains grafted on the PE and PET surfaces effectively induced nucleation and growth of HA crystals.
・ We have studied the bone formation of the marrow cell/polymer composites and also investigated the gene expression analysis relating the bone formation on and around the composites. Recently, we confirmed the in vitro bone formation by marrow cell culture, and the bone formation (osteoblastic activity) was comparable to that of in vivo bone studied by physiochemical, biochemical and gene expression analysis. The in vitro bone tissue can be formed on various biomaterials and interestingly, the in vitro bone has extensive bone forming capability after in vivo transplantation. As described we accomplished basic analysis of marrow cell composites.
・ Concerning the clinical application of the polymer in orthopedic field, we used PLLA ligament for the cases of knee ligament injury and short term follow up results were satisfactory. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] K.Kato,Y.Eika,Y.Ikada: "Deposition of a hydroxyapatite thin layer onto a polymer surface carrying grafted phosphate polmer chains" J.Biomed.Mat.Res.32. 687-691 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Kamei,S.Tamai et al.: "In vivo histological evaluation of Organophosphate immobilized polymers" The Second Far-Eastern Symposium on Biomedical Materials. 115-116 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohgushi,Y.Dohi et al.: "In vitro bone formation by rat marrow cell culture" J Biomed.Mat.Res.32. 333-340 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Yoshikawa,et al.: "Immedinte bone forming capability of prefabricated osteogenic hydroxyapatite" J Biomed.Mat.Res.32. 481-492 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Kato, Y.Eika and Y.Ikada: " "Deposition of a hydroxyapatite thin layr onto a polymer surface carrying grafted phosphate polymer chains"" J.Biomed. Mat. Res. 32. 687-691 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohgushi, Y.Dohi, T.Kakuda, S.Tamai, S.Tabata and Y.Suwa: " "In vitro bone formation by rat marrow cell culture"" J.Biomed. Mat. Res. 32. 333-340 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Ohgushi, Y.Dohi, T.Yoshikawa, S.Tamai, S.Tabata, K.Okunaga and T.Shibuya: " "Osteogenic differentiation of cultured marrow stromal stem cells on the surface of bioactive glass ceramics"" J.Biomed. Mat. Res. 32. 341-348 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Yoshikawa, H.Ohgushi and S.Tamai: " "Immediate bone forming capability of prefabricated osteogenic hydroxyapatite"" J.Biomed. Mat. Res. 32. 481-492 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Kamei, N.Tomita, S.Tamai, K.Kato and Y.Ikada: " "In vivo histological evaluation of organophosphate immobilized polymers"" The Second Far-Eastern Symposium on Biomedical Materials. 115-116 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K. Kato, Y. Eika, Y. Ikada: "Depositior of a hydroxyapatite thin layer on to a polymer surface carrying grafted phosphate polymer chains" Journal of Biomedical Materials Research. 32・4. 687-691 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H. Ohguchi, Y. Dohi, T. katuda, S. Tamai, S. Tabata, Y. Suwa: "Invitro bone formation by rat marrow cell culture" Journal of Biomedical Materials Research. 32・3. 333-340 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T. Yoshikawa, H. Ohgushi, S. Tamai: "Immediate bone forming capability of profabricated osteogeric hydroxyapatite" Journal of Biomedical Materials Research. 32・3. 481-492 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] O.N.Tretinnikov,K.Kato,and Y.Ikada: "In vitro hydroxyapatite deposition onto a film surface-grafted with organophosphate polymer" Journal of Biomedical Materials Research. 28. 1365-1373 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Ohgushi,Y.Dohi,S.Tamai and S.Tabata: "Osteogenic differentiation of marrow stromal stem cells in porous hydroxyapatite ceramics" Journal of Biomedical Materials Research. 27. 1401-1407 (1993)

    • Related Report
      1995 Annual Research Report
  • [Publications] O.N.Tratinnikov,K.Kato,Y.Ikada: "In vitro hydroxyapatite deposition onto a film surface-grafted with organophosphate polymer" Journal of Biomedical Materials Research. 28. 1365-1373 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 筏 義人: "生体材料学" 産業図書株式会社, 280 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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