Development of dental titanium alloys with high corrosion resistance in fluoride environment

氟环境高耐蚀牙科钛合金的研制

• 批准号: 12671892
• 负责人: NAKAGAWA Masaharu
• 金额: $ 2.24万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671892/
• 关键词: Titanium; Titanium alloy; Corrosion; Fluoride; Implant; Dissolved Oxygen

The effects of dissolved-oxygen concentration and fluoride concentration on the corrosion behaviors of commercial pure titanium (Ti), Ti-6A1-4V and Ti 6A1-7Nb alloys and experimentally produced Ti-0.2Pd and Ti-0.5Pt alloys were examined by the corrosion potential measurements, dissolved Ti analyses and surface analyses of the specimen. Pure Ti, Ti-6A1-4V and Ti-6A1-7Nb alloys were easily corroded even in a low fluoride concentration in an acidic environment. The corrosion resistance of Ti-0.2Pd and Ti-0.5Pt alloys were greater than those of pure Ti, Ti-6A1-4V and Ti-6A1-7Nb alloys in the wide range of pH and fluoride concentrations. The high corrosion resistance of Ti- 0.2Pd and Ti-0.5Pt alloys were caused by the surface enrichment of Pd or Pt promoting a repassivation of Ti.Decrease in the dissolved-oxygen concentration tended to have reduced the corrosion resistance of Ti and Ti alloys. Under the low, dissolved-oxygen environment, the corrosion of pure Ti and Ti-6A1-4V and Ti-6A1-7Nb alloys might easily take place in the presence of small amount of fluoride. They were corroded by the half or less fluoride concentration in commercial dentifrices (1OOOppmF). The Ti-0.2Pd and Ti-0.5Pt alloys did not corrode even under the low dissolved-oxygen concentration and fluoride-containing environment. These alloys are expected to be useful as new Ti alloys with high corrosion resistance in dental use.

通过腐蚀电位测量、溶解Ti分析和试样表面分析，研究了溶解氧浓度和氟化物浓度对工业纯钛（Ti）、Ti- 6a1 - 4v和Ti- 6A1-7Nb合金以及实验生产的Ti-0.2 pd和Ti-0.5 pt合金腐蚀行为的影响。纯Ti、Ti- 6a1 - 4v和Ti- 6a1 - 7nb合金在酸性环境中低氟化浓度也容易腐蚀。在较宽的pH和氟浓度范围内，Ti-0.2 pd和Ti-0.5 pt合金的耐蚀性均高于纯Ti、Ti- 6a1 - 4v和Ti- 6a1 - 7nb合金。Ti- 0.2Pd和Ti-0.5Pt合金的高耐蚀性是由于表面Pd或Pt的富集促进了Ti的再钝化。溶解氧浓度的降低往往会降低钛及其合金的耐蚀性。在低溶解氧环境下，少量氟化物存在时，纯Ti和Ti- 6a1 - 4v、Ti- 6a1 - 7nb合金容易发生腐蚀。它们被商用牙膏中氟浓度的一半或更低（100oppmf）所腐蚀。Ti-0.2Pd和Ti-0.5Pt合金在低溶解氧浓度和含氟环境下也不发生腐蚀。这些合金有望作为具有高耐蚀性的新型钛合金在牙科应用中发挥重要作用。

项目成果

Masaharu NAKAGAWA et al.: "Corrosion Behavior of Pure Titanium and Titanium Alloys in Fluoride-containing Solutions"DENTA L MATERIALS JOURNAL. Vol. 20, No. 4. 305-314 (2001)

Masaharu NAKAGAWA 等：“纯钛和钛合金在含氟溶液中的腐蚀行为”DENTA L MATERIALS JOURNAL。

Nobuhiro TSUJI, Michiaki SADAOKA, Kuniko ISHIBASHI, Masaharu NAKAGAWA et al.: "The Study of Color Change and Corrosion of Ag-Pd-Cu-Au Alloy"Journal of Esthetic Dentistry. Vol. 13, No. 2. 264-270 (2001)

Nobuhiro Tsuji、Michiaki SADAOKA、Kuniko ISHIBASHI、Masaharu NAKAGAWA 等：“Ag-Pd-Cu-Au 合金的颜色变化和腐蚀研究”美容牙科杂志。

Masaharu NAKAGAWA 他: "Corrosion Behavior of Pure Titanium and Titanium Alloys in Fluoride-containing Solutions"DENTAL MATERIALS JOURNAL. Vol.20 No.4. 305-314 (2001)

Masaharu NAKAGAWA 等人：“纯钛和钛合金在含氟化物溶液中的腐蚀行为”《牙科材料杂志》第 20 卷第 305-314 期（2001 年）。

辻 展弘, 貞岡岐信, 石橋邦子, 中川雅晴 他: "歯科用金銀パラジウム合金の変色と腐食"歯科審美. 13巻・2号. 264-270 (2001)

Nobuhiro Tsuji、Kishin Sadaoka、Kuniko Ishibashi、Masaharu Nakakawa 等：“牙科金银钯合金的变色和腐蚀”《牙科美学》第 13 卷，第 2 期。264-270 (2001)