Fundação Universitária Vida Cristã - Funvic, Discipline of Oral Surgery, Pindamonhangaba, SP, Brazil.
Faculdade de Tecnologia de Pindamonhangaba - Fatec, Pindamonhangaba, SP, Brazil.
Braz Oral Res. 2024 Sep 9;38:e091. doi: 10.1590/1807-3107bor-2024.vol38.0091. eCollection 2024.
The aim of this study was to evaluate the wettability and adhesion of self-organized TiO2 nanotubes formed on the surface of 8 commercially pure titanium (CP-Ti) disks and 12 dental implants (n = 12) by anodization in a glycerol-H2O (50-50 v/v) electrolyte containing NH4F. Two disk specimens were not submitted to anodization (controls). The nanotubes thus obtained had average dimensions of 50 nm in diameter by 900 nm in length. The treated disk specimens were stored for 2, 14 and 35 days (n = 2), and the wettability of their surfaces was evaluated with a goniometer at the end of each storing period. The adhesion of nanotubes to titanium was evaluated by field emission scanning electron microscopy after subjecting the 12 implants to a simulation of clinical stress in two-part synthetic bone blocks. After installing the implants with the application of an insertion torque, the two halves of the block were separated, and the implants were removed. The nanotubes remained adhered to the substrate, with no apparent deformation. The contact angles after 14 days and 35 days were 16.47° and 17.97°, respectively, values significantly higher than that observed at 2 days, which was 9.24° (p < 0.05). It was concluded that the method of anodic oxidation tested promoted the formation of a surface suitable for clinical use, containing nanotubes with levels of wettability and adhesion to titanium compatible with those obtained by other methods found in the literature. The wettability, however, did not prove stable over the tested storage periods.
本研究旨在评估通过在甘油-H2O（50-50v/v）电解质中加入 NH4F 对 8 个商用纯钛（CP-Ti）圆盘和 12 个牙种植体表面进行阳极氧化形成的自组织 TiO2 纳米管的润湿性和附着力。两个圆盘标本未经阳极氧化处理（对照）。由此获得的纳米管的平均尺寸为 50nm 直径×900nm 长度。处理后的圆盘标本分别储存 2、14 和 35 天（n=2），并在每个储存期结束时使用测角仪评估其表面的润湿性。通过将 12 个种植体置于两部分合成骨块中模拟临床应力，评估纳米管对钛的附着力。在应用插入扭矩安装植入物后，将块体的两半分开，并取出植入物。纳米管仍然附着在基底上，没有明显的变形。14 天和 35 天后的接触角分别为 16.47°和 17.97°，明显高于 2 天的 9.24°（p<0.05）。结论是，所测试的阳极氧化方法促进了适合临床使用的表面的形成，该表面包含纳米管，其润湿性和对钛的附着力水平与文献中其他方法获得的水平相当。然而，润湿性在测试的储存期内并不稳定。
