A Cone-Beam Computed Tomographic Assessment of the Proximity of the Maxillary Canine and Posterior Teeth to the Maxillary Sinus Floor

2019 Fiscal Year Final Research Report

• Project/Area Number: 19K21364
• Project/Area Number (Other): 18H06273 (2018)
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund (2019); Single-year Grants (2018)
• Review Section: 0907:Oral science and related fields
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: Oishi Shuji 東京医科歯科大学, 歯学部附属病院, 特任助教 (50822532)
• Project Period (FY): 2018-08-24 – 2020-03-31
• Keywords: 矯正歯科 / 歯根吸収 / CBCT / 上顎洞

Outline of Final Research Achievements

When tooth roots protrude into the maxillary sinus, apical root resorption and tipping may occur during horizontal tooth movement across the sinus floor. Three-dimensional cone-beam computed tomography (CBCT) images may provide detailed information without distortion and overlap. We evaluated the relationships between the maxillary tooth root apices and the maxillary sinus floor, using CBCT.
Our study provides valuable information for planning orthodontic tooth movement through the maxillary sinus, which may help to predict the occurrence and severity of root resorption.

Free Research Field

矯正歯科

Academic Significance and Societal Importance of the Research Achievements

矯正歯科臨床では二次元的なX 線画像を用いた分析が主流であり、歯根吸収の正確な評価は困難であったが、近年CBCT の普及により歯根吸収の3 次元的評価が可能となった。日本国内においては、上顎洞と歯根の関係や上顎洞内への歯の移動に注目した報告はなく、矯正歯科治療の安全性に関する報告は報告がない。
本研究成果として、上顎洞と歯根の関係をCBCTを用いて評価した国内初の報告を行うことができ、矯正歯科治療の安全性について検証する社会的意義があると考えられる。