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Strategic research for the development and practical application of devices that compensate for the accuracy and trueness of digital impressions

Research Project

Project/Area Number 22K21000
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionShowa University

Principal Investigator

Masu Rena  昭和大学, 歯学部, 助教 (00965890)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords光学印象 / 無歯顎 / インプラント / デジタル印象 / 真度 / スキャン補助デバイス / デジタル / 口腔内スキャナー
Outline of Research at the Start

口腔内スキャナーを用いたデジタル印象法は口腔内を直接スキャンして三次元形態データを取得することにより,補綴装置の寸法精度の低下が解消される.しかし,口腔内スキャナーは,印象範囲が大きくなるにつれて精度が低下することが報告されている.そこで予備的検討において,補助デバイスを開発し,欠損部顎堤に介することで従来法よりも精度が向上することが示された.しかし,臨床応用と製品化に向けて,真度の検討,形態の最適化,スキャンパスの構築,およびin vivoにおける効果測定など不明点が多い.そこで本研究の目的は補助デバイスの形態の最適化と,最適化された補助デバイスの精度・真度補償効果を検証することである.

Outline of Final Research Achievements

It has been reported that the accuracy of intraoral scanners decreases as the impression area increases. In a preliminary study, an auxiliary device was developed and shown to be more accurate than the conventional method when placed over the crest of a defect. However, there are still many unknowns for the clinical application and commercialization, such as the investigation of the degree of authenticity, optimization of the morphology, construction of the scan path, and in vivo measurement of the effect. Therefore, this study was conducted to optimize the morphology of the assistive device and to verify the accuracy and truth compensation effect of the optimized assistive device. After approval by the Ethics Review Board, the accuracy and authenticity of the assistive device developed in the human oral cavity were significantly improved.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果,実際のヒト口腔内にて補助デバイスを使用し,口腔内スキャナーを用いてデジタル印象を行った際に,使用しない場合と比べて有意に精度及び真度が向上した.
これは,従来の印象方法と比較しコスト削減とともに,患者の不快感の軽減及び,スキャンデータをデータベースとして保存可能になると考えられる.これは臨床的に非常に意義があると言える.

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (2 results)

All 2023 2022

All Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Newly developed device for full arch digital impression of dental implants for edentulous maxilla:An in vitro study2023

    • Author(s)
      Rena Masu, Shinpei Tanaka, Minoru Sanda, Kazuyoshi Baba
    • Organizer
      Pacific Coast Society for Prosthodontics, 88th Annual Meeting and Scientific Session
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Newly developed scanning aid for full-arch digital impressions of dental implants for edentulous maxilla: An in vitro study2022

    • Author(s)
      Rena Masu, Shinpei Tanaka, Minoru Sanda, Kazuyoshi Baba
    • Organizer
      European Association for Osseointegration Congress 2022 in Geneva
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-09-01   Modified: 2025-01-30  

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