Effect of cooling by irrigation during implant placement on surrounding bone healing

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K23031
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0907:Oral science and related fields
• Research Institution: Kyushu University
• Principal Investigator: JINNO YOHEI 九州大学, 大学病院, 助教 (40507779)
• Project Period (FY): 2020-09-11 – 2023-03-31
• Keywords: 歯科インプラント / 埋入手術 / オッセオインテグレーション

Outline of Final Research Achievements

Early implant failure has been observed frequently in dental implant treatment. Research and discussion on this matter is lacking, and more careful placement procedures should be established. We have continued the researches about intraosseous changes caused by dental implant placement after undersized drilling, that is the technique for higher primary stability. We believe that one of the reasons for intraosseous changes is the heat generated during placement. We conducted the animal experiments to confirm that heat generation can be suppressed by water injection during implantation. The intra-bone temperature (1mm from the implant surface and 2mm deep from the bone surface) decreased (2°C) when the implant surface was moistened during placement. This suggests the effectiveness of water injection during high-torque implantation.

Free Research Field

歯科補綴学

Academic Significance and Societal Importance of the Research Achievements

インプラント埋入手術における骨内の温度上昇に関してはこれまで多くの報告があるがそのほとんどはドリリング時の温度上昇に関するものである。我々は埋入時の温度上昇に関する動物実験と有限要素法解析を行ってきた。周囲骨の壊死を惹起するレベルの温度上昇が起こることが明らかになりその対策の必要性も同様に明らかになった。埋入時の注水により温度上昇を抑制できることが示されたため、今後は埋入時の注水の有効性を広く臨床現場に周知していく必要がある。