Establishment of digital impression method and fabrication technique of high precision prosthesis using CAD/CAM

• Project/Area Number: 26462939
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Showa University
• Principal Investigator: Tanaka Shinpei 昭和大学, 歯学部, 講師 (40365705)
• Co-Investigator(Kenkyū-buntansha): 岩佐 文則 昭和大学, 歯学部, 准教授 (60297025)
• Research Collaborator: TAKABA Masayuki ; KAMIMURA Emi
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: デジタルデンティストリー / 口腔内スキャナー / 光学印象 / CAD/CAM / クラウン・ブリッジ / デジタル・デンティストリー / ジルコニア / インプラント

Outline of Final Research Achievements

The aim of this study was to evaluate inter-operator reproducibility of 3 dimensional images captured by digital impression tecnique in comparison with silicone impression techniques in vivo. Twelve subjects with complete natural dentition were included in this study. Digital impression of the mandibular molars was made by the two operators using the intra-oral scanner. Silicone impression was also made by the same operators. The STL datasets were loaded into 3D evaluation software. Inter-operator reproducibility as evaluated by averaged discrepancies of corresponding 3D data was compared between 2 techniques. The discrepancy between repeated digital impressions was significantly smaller than that of silicone impression. The results of this in vivo study suggest that inter-operator reproducibility of the digital impression technique might be better than that of conventional impression technique, which is independent upon the clinical experience of the operator.

Research Products

• [Journal Article] In vivo evaluation of inter-operator reproducibility of digital dental and conventional impression techniques (2017)
  • Author(s): Kamimura Emi、Tanaka Shinpei、Takaba Masayuki、Tachi Keita、Baba Kazuyoshi
  • Journal Title: PLOS ONE Volume: 12 Issue: 6 Pages: 0179188-0179188
  • DOI: 10.1371/journal.pone.0179188
  • Peer Reviewed / Open Access
• [Journal Article] Current status and future prospective of digital based prosthetic dentistry (2017)
  • Author(s): 田中晋平，馬場一美
  • Journal Title: Annals of Japan Prosthodontic Society Volume: 9 Issue: 1 Pages: 38-45
  • DOI: 10.2186/ajps.9.38
  • NAID: 130005243529
  • ISSN: 1883-4426, 1883-6860
  • Peer Reviewed / Open Access
• [Journal Article] Benefit of Digital Dentistry on Edentulous Patients (2016)
  • Author(s): 田中晋平，馬場一美
  • Journal Title: Annals of Japan Prosthodontic Society Volume: 8 Issue: 4 Pages: 414-419
  • DOI: 10.2186/ajps.8.414
  • NAID: 130005279590
  • ISSN: 1883-4426, 1883-6860
  • Peer Reviewed / Open Access
• [Journal Article] 光学印象採得で変わる補綴歯科治療 (2016)
  • Author(s): 馬場一美，田中晋平，高場雅之，西山弘崇，上村江美
  • Journal Title: 日本歯科評論 Volume: 76 Pages: 33-82
• [Presentation] In Vivo Evaluation of Inter-operator Reproducibility of Digital Impression Technique (2015)
  • Author(s): E. KAMIMURA, S. TANAKA, M. TAKABA, K.TACHI, and K. BABA
  • Organizer: International Association for Dental Research (IADR)
  • Place of Presentation: アメリカ，ボストン
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] Evaluation of inter-operator Reproducibility using Digital and Silicone impression techniques (2014)
  • Author(s): E. KAMIMURA, S. TANAKA, M. TAKABA, K.TACHI, and K. BABA
  • Organizer: Asian Academy of Prosthodontics (AAP)
  • Place of Presentation: 台湾，台北
  • Year and Date: 2014-11-21 – 2014-11-24