Development of Tooth Wear Repair and Progress Restraint Method using Er:YAG Laser Deposition Technique

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K10142
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 57030:Conservative dentistry-related
• Research Institution: Kindai University
• Principal Investigator: Hontsu Shigeki 近畿大学, 生物理工学部, 名誉教授 (40157102)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: Tooth Wear / エナメル質修復 / Er:YAGレーザー / ハイドロキシアパタイト

Outline of Final Research Achievements

The treatment for the third dental disease such as tooth wear has not been fully established yet. The purpose of the present study was to evaluate the usefulness of the newly developed Er: YAG pulsed laser deposition (Er: YAG-PLD) method for the treatment. It was found that the enamel defect was repaired with hydroxyapatite (HAp) membranes fabricated by the Er: YAG-PLD method. Its hardness was higher than that of the resin which is used in the current treatment. The HAp sedimentary membrane was also effective not only to block enamel cracks but also to use as a sealant for pit fissures. Furthermore, the acid resistance was improved by fluorinating the sedimentary film. The above results indicate that the Er: YAG-PLD method is extremely useful for the treatment of tooth wear.

Free Research Field

保存治療用歯科材料工学

Academic Significance and Societal Importance of the Research Achievements

未だ治療法が確立されておらず、また進行抑制あるいは予防法に関する知見も少ないTooth wear などの第3 の歯科疾患に対して、口腔内で直接歯質上にHAp膜を堆積できるEr:YAG-PLD法という新規治療・抑制法が、歯質と同素材によるエナメル質の欠損部分の修復、エナメルクラック部分の封鎖、さらには小窩裂溝のシーラントまで応用できることがわかった。これらの結果からEr:YAG-PLD法がアンチエイジングとQOLの向上に寄与できることが明らかになった。