Development of new orthodontic micro implant system

• Project/Area Number: 24792155
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Dental engineering/Regenerative dentistry
• Research Institution: Nihon University
• Principal Investigator: TANIMOTO Yasuhiro 日本大学, 松戸歯学部, 准教授 (40312045)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: アンカースクリュー / 歯科矯正 / 生体吸収性材料 / リン酸カルシウム / 有限要素法 / 歯科矯正用アンカースクリュー / 数値解析 / 機械的性質 / ポリグリコール酸 / チタン

Outline of Final Research Achievements

The purpose of this study was to develop a new anchor-screw system for orthodontics. Firstly, the failure mechanism of anchor-screw was clarified by both pull-out experiment and numerical simulation. Next, the mechanical and biological properties of polyglycolic acid (PGA)/hydroxyapatite (HA) composites for anchor-screw application were investigated. In addition to these, the optimum structure design of anchor-screw made from PGA/HA composite was performed by using finite element method. In conclusion, it was indicated that the PGA/HA composite is a promising material for an anchor-screw system.

Research Products

• [Journal Article] Color stability of laboratory glass-fiber-reinforced plastics for esthetic orthodontic wires (2015)
  • Author(s): Toshihiro Inami, Yasuhiro Tanimoto, Naomi Minami, Masaru Yamaguchi, Kazutaka Kasai
  • Journal Title: Korean Journal of Orthodontics Volume: 45(3)
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Preparation, mechanical and in vitro properties of glass fiber-reinforced polycarbonate composites for orthodontic application (2015)
  • Author(s): Yasuhiro Tanimoto, Toshihiro Inami, Masaru Yamaguchi, Norihiro Nishiyama, Kazutaka Kasai
  • Journal Title: Journal of Biomedical Materials Research Part B: Applied Biomaterials Volume: In press
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Surface topography, hardness, and frictional properties of GFRP for esthetic orthodontic wires (2015)
  • Author(s): Inami T., Tanimoto Y., Yamaguchi M., Shibata Y., Nishiyama N., Kasai K.
  • Journal Title: Journal of Biomedical Materials Research Part B: Applied Biomaterials Volume: 103 Issue: 1 Pages: 88-95
  • DOI: 10.1002/jbm.b.33372
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Morphology and In Vitro Behavior of Electrospun Fibrous Poly(D,L-lactic acid) for Biomedical Applications. (2013)
  • Author(s): Inami T., Tanimoto Y., Ueda M., Shibata Y., Hirayama S., Yamaguchi M., and Kasai K.
  • Journal Title: Advances in Materials Science and Engineering Volume: 140643 Pages: 1-6
  • DOI: 10.1155/2013/140643
  • Peer Reviewed
• [Journal Article] <b>Effects of Indentation Load on the Mechanical Behavior of Orthodontic Wire Alloys by Dynamic Micro-Indentation Method </b> (2013)
  • Author(s): Mariko Nagai, Yasuhiro Tanimoto, Toshihiro Inami, Masaru Yamaguchi, Norihiro Nishiyama, Kazutaka Kasai
  • Journal Title: International Journal of Oral-Medical Sciences Volume: 12 Issue: 1 Pages: 41-48
  • DOI: 10.5466/ijoms.12.41
  • NAID: 130003375198
  • ISSN: 1347-9733, 2185-4254
  • Peer Reviewed
• [Journal Article] Mini-implants in the anchorage armamentarium: new paradigms in the orthodontics (2012)
  • Author(s): Masaru Yamaguchi, Toshihiro Inami, Ko Ito, Kazutaka Kasai, Yasuhiro Tanimoto
  • Journal Title: International Journal of Biomaterials Volume: 2012(394121) Pages: 1-8
  • DOI: 10.1155/2012/394121
  • Peer Reviewed
• [Presentation] 歯科矯正用アンカースクリューの構造特性及び脱離メカニズムに関する研究 (2014)
  • Author(s): 加藤勇輝、荻原知良、青木義男、谷本安浩
  • Organizer: 第58回日本大学理工学部学術講演会
  • Place of Presentation: 日本大学理工学部駿河台校舎（東京都千代田区）
  • Year and Date: 2014-12-06
• [Presentation] 「基礎研究から見える未来」 メタルフリー素材の矯正歯科領域への応用 (2014)
  • Author(s): 谷本安浩
  • Organizer: 第73回日本矯正歯科学会大会
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2014-10-20 – 2014-10-22
  • Invited
• [Presentation] 歯科矯正用アンカースクリューへの応用を目的としたPGA/HAコンポジット体の生物学的評価 (2014)
  • Author(s): 八尾恵梨子、山口大、谷本安浩、高橋桃子、葛西一貴
  • Organizer: 第64回日本歯科理工学会学術講演会
  • Place of Presentation: アステールプラザ（広島県広島市）
  • Year and Date: 2014-10-04 – 2014-10-05
• [Presentation] 歯科矯正用アンカースクリューへの応用を目的としたPGA/HAコンポジット体の機械的評価 (2014)
  • Author(s): 高橋桃子、山口大、谷本安浩、八尾恵梨子、葛西一貴
  • Organizer: 第64回日本歯科理工学会学術講演会
  • Place of Presentation: アステールプラザ（広島県広島市）
  • Year and Date: 2014-10-04 – 2014-10-05
• [Presentation] アンカースクリューへの応用を目的とした生体吸収性ポリマーの生物学的評価
  • Author(s): 高橋桃子，山口大，谷本安浩，井波俊博，八尾恵梨子，葛西一貴
  • Organizer: 第72回日本矯正歯科学会大会
  • Place of Presentation: キッセイ文化ホール・松本市総合体育館（長野県松本市）
• [Presentation] 歯列矯正用アンカースクリューの最適形状に関する基礎研究
  • Author(s): 田中孝哲，加藤勇輝，青木義男，田畑昭久，谷本安浩
  • Organizer: 日本機械学会第24回バイオフロンティア講演会
  • Place of Presentation: 同志社大学室町キャンパス（京都府京都市）
• [Presentation] PGAを用いた歯科矯正用アンカースクリューの開発
  • Author(s): 谷本安浩，高橋桃子，山口大，八尾恵梨子，西山典宏，葛西一貴
  • Organizer: 第35回日本バイオマテリアル学会大会
  • Place of Presentation: タワーホール船堀（東京都江戸川区）