EXPERIMENTAL STUDY ON THE MECHANISM OF ACQUIRED ACID RESISTANCE OF HUMAN DENTAL ENAMEL BY LASER IRRADIATION

激光照射人牙釉质获得性耐酸性机制的实验研究

• 批准号: 02454472
• 负责人: TAGOMORI Shoko
• 金额: $ 4.99万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02454472/
• 关键词: HUMAN ENAMEL; LASER IRRADIATION; HEATING; BIREFRINGENCE; X-RAY DIFFRACTION; INFRARED SPECTROSCOPY; THERMAL ANALYSES; レ-ザ-照射; エナメル質; 耐酸性; アパタイト結晶; 天然ハイドロキシアパタイト; 赤外分光分析

A possible mechanism of acquired acid resistance of lased enamel was proposed on the basis of the investigations of optical properties, compositional and structural changes and permeability of lased and unlased human dental enamel. Lased enamel showed a high positive birefringence, suggesting the formation of 'microspaces' in enamel. No new products were found, though a decrease of lattice strain and a slight a-axis contraction were recognized in lased enamel compared with unlased enamel. The contents of water, carbonate and organic substances were reduced in lased enamel.On the other hand, the optical properties and permeability of heated enamel and lased enamel after treatment with various solutions were investigated to elucidate the structural changes caused in dental enamel by laser irradiation. Heated enamel at 400ﾟC for 24 hours acquired the highest resistance to acid decalcification and showed a high positive birefringence which was similar to that of lased enamel. Carbolic fuchsin, acidulated phosphate fluoride (APF), and calcifying fluid did not penetrate the heated enamel, though those solutions penetrated the lased enamel well. Gradual changes of birefringence were observed in lased enamel during treatment with acid solutions, and this change was attributed to mineralization of the microspaces in lased enamel.These results suggested that the structural changes in lased enamel are different from those of heated enamel. It appears that lased enamel has micropathways through which solutions can penetrate into the enamel, and also microspaces which could act as sites of deposition for ions released by acid decalcification.

提出了酸化的搪瓷的机制，该机制是针对牙釉质中的“微地位”的牙釉质的结构变化和牙釉质的。另一方面，治疗后的光学特性和加热性的渗透性在林中，没有在酸溶液中穿透加热的搪瓷，这表明蛋白质溶液可以渗透到牙釉质中，也可以用作通过酸脱氨酸释放的离子的微地位。

项目成果

T.Morioka: "Proceedinge of The 3rd World Congress on Preventive Dentistry" Preventive Dentistry.Faculty of Dentistry,KYUSHU UNIVERSITY, 325 (1992)

T.Morioka：“第三届世界预防牙科大会论文集”预防牙科。九州大学牙科学院，325（1992）

於孝 孝彦: "唾液浸漬によるレーザー照射エナメル質の変化" 口腔衛生学会雑誌. 42. 353-358 (1992)

Takahiko Otaka：“由于唾液浸泡导致激光照射牙釉质的变化”口腔卫生学会杂志 42. 353-358 (1992)。

森岡 俊夫: "レ-ザ-歯学最近の進歩" 歯界展望. 79. 1011-1020 (1992)

Toshio Morioka：“激光牙科的最新进展”Dental Perspectives 79. 1011-1020 (1992)。

於保 孝彦: "唾液浸漬によるレーザー照射エナメル質の変化" 口腔衛生学会雑誌. 42. 353-358 (1992)

Takahiko Obo：“唾液浸泡导致激光照射牙釉质的变化”口腔卫生学会杂志 42. 353-358 (1992)。

森岡 俊夫,於保 孝彦: "Arレ-ザ-照射によるヒトエナメル質のX線回折による耐酸性向上機構" 第3回日本レ-ザ-歯学研究会. (1991)

Toshio Morioka、Takahiko Obo：“通过 Ar 激光照射对人体牙釉质进行 X 射线衍射来提高耐酸性的机制”，第 3 届日本激光牙科研究小组（1991 年）。