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Research Aiming for High Functionality and Longevity of Dental Prostheses by applying island-scanning Strategy

Research Project

Project/Area Number 20K10068
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Takaichi Atsushi  東京医科歯科大学, 東京医科歯科大学病院, 講師 (30707047)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords粉末床溶融結合法 / Selective laser melting / スキャンストラテジー / 残留応力 / 適合性 / ブリッジ / Powder bed fusion / レーザースキャン戦略 / 歯科補綴装置 / 積層造形 / SLM / 残留応略
Outline of Research at the Start

本研究は工学系を中心に蓄積したエビデンスを臨床レベルに発展させることで、歯科補綴装置特有の設計に特化した戦略的レーザー走査法を構築することが主たる目標である。そのために補綴装置の構造レベルで区画化するレーザー走査法の有効性を適合性、機械的性質など多角的に検証し、歯科補綴装置の高機能・高寿命化を達成するための新たな造形条件の構築を目指す。

Outline of Final Research Achievements

When producing a fixed partial denture (FPD) using the Selective Laser Melting (SLM) method, a powder bed fusion process, a new method applying the island scan strategy was applied, and the effect of the new method on the adaptation of the FPDs and the residual stress were evaluated. As a result, in the case of a 4-unit FPDs, the new method showed good adaptation accuracy compared to the conventional method, particularly demonstrating a significant improvement in the margin area. A decrease in residual stress was observed in the direction where the laser scan vector became shorter, and a reduction in residual stress was observed at the partitioning boundary (the connection between the crown and pontic) in all bridges, suggesting the usefulness of the new developed method.

Academic Significance and Societal Importance of the Research Achievements

SLM法は複雑形状の金属製歯科補綴装置製作の有望な製作手段であるが,大型の歯科補綴装置になるほど適合性が悪くなることが報告されており,その原因として造形中の残留応力の存在が指摘されてきた.今回新たに考案した方法では適合性を損なう原因となる残留応力の低減が図られ,結果としてブリッジのマージンの適合性が改善された.今回得られた結果より,SLM法を用いた歯科補綴装置製作の適応範囲が拡大され,CAD/CAM技術を用いた歯科補綴装置製作における質の標準化に寄与することが期待される.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (27 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (17 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Remarks (3 results)

  • [Journal Article] Influence of stress-relieving heat treatments on the efficacy of Co-Cr-Mo-W alloy copings fabricated using selective laser melting2024

    • Author(s)
      Htat Hein Linn、Takaichi Atsushi、Kajima Yuka、Kittikundecha Nuttaphon、Kamijo Shingo、Hanawa Takao、Wakabayashi Noriyuki
    • Journal Title

      Journal of Prosthodontic Research

      Volume: 68 Issue: 2 Pages: 310-318

    • DOI

      10.2186/jpr.JPR_D_22_00283

    • ISSN
      1883-1958, 1883-9207
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of ultraviolet irradiation treatment on shear bond strength between polymethyl methacrylate and cobalt-chromium-molybdenum alloy2023

    • Author(s)
      THANT San Win、TAKAICHI Atsushi、KAJIMA Yuka、MOHAMED Amr、NOZAKI Kosuke、TAKAHASHI Hidekazu、CHEN Peng、HANAWA Takao、WAKABAYASHI Noriyuki
    • Journal Title

      Dental Materials Journal

      Volume: 42 Issue: 5 Pages: 748-755

    • DOI

      10.4012/dmj.2023-058

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2023-09-25
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physical Properties of Additively Manufactured Tooth-Colored Material Attached to Denture Base-Colored Material in a Printed Monolithic Unit2023

    • Author(s)
      Mohamed Amr、Takaichi Atsushi、Kajima Yuka、Takahashi Hidekazu、Wakabayashi Noriyuki
    • Journal Title

      Polymers

      Volume: 15 Issue: 9 Pages: 2134-2134

    • DOI

      10.3390/polym15092134

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reusing the Co?Cr?Mo support structures of selective laser melted parts: Evaluation of mechanical properties and microstructures2023

    • Author(s)
      Mohamed Amr、Takaichi Atsushi、Kajima Yuka、Hanawa Takao、Wakabayashi Noriyuki
    • Journal Title

      Sustainable Materials and Technologies

      Volume: 36 Pages: e00608-e00608

    • DOI

      10.1016/j.susmat.2023.e00608

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bond strength of CAD/CAM denture teeth to a denture base resin in a milled monolithic unit2023

    • Author(s)
      Mohamed Amr、Takaichi Atsushi、Kajima Yuka、Takahashi Hidekazu、Wakabayashi Noriyuki
    • Journal Title

      Journal of Prosthodontic Research

      Volume: 67 Issue: 4 Pages: 610-618

    • DOI

      10.2186/jpr.JPR_D_22_00190

    • ISSN
      1883-1958, 1883-9207
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Recrystallization behavior of selective laser melted Co-Cr-Mo alloys with several heat treatment times2022

    • Author(s)
      Kajima Yuka、Takaichi Atsushi、Linn Htata Hein、Hanawa Takao、Wakabayashi Noriyuki
    • Journal Title

      Materials Science and Engineering: A

      Volume: 856 Pages: 143998-143998

    • DOI

      10.1016/j.msea.2022.143998

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of Post-Heat Treatment Cooling Conditions on Microstructures and Fatigue Properties of Cobalt Chromium Molybdenum Alloy Fabricated through Selective Laser Melting2021

    • Author(s)
      Wai Cho Hla Htoot、Takaichi Atsushi、Kajima Yuka、Htat Hein Linn、Kittikundecha Nuttaphon、Hanawa Takao、Wakabayashi Noriyuki
    • Journal Title

      Metals

      Volume: 11 Issue: 7 Pages: 1005-1005

    • DOI

      10.3390/met11071005

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 金属積層造形によるブリッジ製作における 区画化型スキャンストラテジーの適合性への影響.2023

    • Author(s)
      小林 義夫, 加嶋 祐佳, 高市 敦士, 若林 則幸.
    • Organizer
      国際・産学連携インヴァースイノベーション 材料創出(DEJI2MA)プロジェクト 公開討論会会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 金属積層造形における区画化型スキャン戦略のブリッジの適合性への影響.2023

    • Author(s)
      小林義夫,高市敦士,加嶋祐佳,若林則幸.
    • Organizer
      第 82 回日本歯科理工学会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 金属積層造形を用いた歯科補綴装置製作時の加工方法の工夫2023

    • Author(s)
      髙市 敦士
    • Organizer
      金属光造形複合加工医療機器フォーラム 第19回シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Effect of ultraviolet treatment on shear bond strength between polymethyl methacrylate and cobalt-chromium-molybdenum alloy fabricated by selective laser melting2023

    • Author(s)
      Atsushi Takaichi, Yuka Kajima, San Win Thant, Noriyuki Wakabayashi
    • Organizer
      Ninth International Conference on Mechanics of Biomaterials and Tissues
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of beam spot size on the microstructural and mechanical properties of selective laser melted Co-Cr-Mo alloys.2023

    • Author(s)
      Yuka Kajima, Atsushi Takaichi, Hein Linn Htat, Noriyuki Wakabayashi.
    • Organizer
      Ninth International Conference on Mechanics of Biomaterials and Tissues
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of scanning strategies on the fitness accuracy and residual stress of SLM-fabricated 3-unit fixed dental prostheses.2023

    • Author(s)
      Yoshio Kobayashi, Yuka Kajima, Atsushi Takaichi, and Noriyuki Wakabayashi.
    • Organizer
      The 3rd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] レーザー積層造形法により製作したCoCrMo合金の再結晶現象におよぼす熱処理時間の影響.2022

    • Author(s)
      加嶋祐佳,高市敦士,ヘインリンテッ,塙隆夫,若林則幸
    • Organizer
      第79回日本歯科理工学会学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] UV照射によるCo-Cr-Mo合金と義歯床用レジンとの接着強化.2022

    • Author(s)
      高市敦士,サンウィンタン,モハメドアムール,加嶋祐佳,蘆田茉希, 塙 隆夫, 若林則幸.
    • Organizer
      第79回日本歯科理工学会学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Selective laser melting法による歯科補綴装置製作の現在2022

    • Author(s)
      高市 敦士
    • Organizer
      金属光造形複合加工医療機器フォーラム 10周年記念シンポジウム
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] CAD/CAM技術を応用した人工歯・義歯床の製作.2022

    • Author(s)
      高市 敦士
    • Organizer
      日本補綴歯科学会第131回学術大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] SLM 法で製作したCo-Cr-Mo 合金の熱処理による再結晶化.2022

    • Author(s)
      ヘイン リンテッ, 髙市敦士, 加嶋祐佳, 若林則幸, 塙 隆夫.
    • Organizer
      国際・産学連携インヴァースイノベーション材料創出プロジェクト 公開討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] Effect of several heat treatment times on the microstructure and mechanical behavior of selective laser melted Co-Cr-Mo alloys2022

    • Author(s)
      Kajima Y, Takaichi A, Hanawa T, Wakabayashi N.
    • Organizer
      The 2nd International Symposium on Design & Engineering by Joint Inverse Innovation for Materials Architecture (DEJI2MA)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] レーザー積層造形法により製作したCo-Cr-Mo-W 合金の熱処理温度が陶材焼付強度に与える影響.2021

    • Author(s)
      Hein Linn Htat, Kajima Yuka, Takaichi Atsushi, Hla Htoot Wai Cho, Kamijo Shingo, Hanawa Takao, Wakabayashi Noriyuki.
    • Organizer
      第77回 日本歯科理工学会春期学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] レーザー積層造型法のCo-Cr-Mo製サポートの再利用ー機械的性質と組織の評価ー.2021

    • Author(s)
      モハメドアムール,髙市敦士,加嶋祐佳,ヘインリンテツ,サンウィンタン,若林則幸.
    • Organizer
      日本補綴歯科学会 東京支部第25回学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 紫外線照射の義歯床用レジンとCo-Cr合金の接着強度への影響.2021

    • Author(s)
      サンウィンタン,髙市敦士,加嶋祐佳,モハメドアムール,若林則幸
    • Organizer
      日本補綴歯科学会 東京支部第25回学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] カスタムプレートを用いたフルデジタル部分床義歯製作方法の開発.2021

    • Author(s)
      秋山 洋,金澤 学,岩城麻衣子,羽田多麻木,副田弓夏,大竹涼介,村上奈津子,髙市敦士,若林則幸,水口俊介.
    • Organizer
      日本補綴歯科学会第130回記念学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] レーザー積層造形法で製作したCo-Cr-Mo合金への熱処理の冷却条件が組織と機械的性質へ与える影響2020

    • Author(s)
      ラトウウェイチョー, 加嶋祐佳, 高市敦士, へインリンテツ,若林則幸
    • Organizer
      日本補綴歯科学会第129回学術大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 東京医科歯科大学 生体補綴歯科学分野

    • URL

      https://www.tmd.ac.jp/pro/

    • Related Report
      2023 Annual Research Report
  • [Remarks] 研究者データベース

    • URL

      https://reins.tmd.ac.jp/html/100011368_ja.html

    • Related Report
      2022 Research-status Report
  • [Remarks] 生体補綴歯科学分野HP

    • URL

      https://www.tmd.ac.jp/pro/

    • Related Report
      2022 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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