scholarly journals Study on penetration of titanium dioxide (TiO2) nanoparticles into intact and damaged skin in vitro

2010 ◽  
Vol 35 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Mika Senzui ◽  
Toshiaki Tamura ◽  
Keiko Miura ◽  
Yoshiaki Ikarashi ◽  
Yoshiteru Watanabe ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanoparticles

scholarly journals Oxidative stress pathways involved in cytotoxicity and genotoxicity of titanium dioxide (TiO2) nanoparticles on cells constitutive of alveolo-capillary barrier in vitro

2016 ◽  
Vol 33 ◽  
pp. 125-135 ◽  
Author(s):  
Maïté Hanot-Roy ◽  
Emilie Tubeuf ◽  
Ariane Guilbert ◽  
Anne Bado-Nilles ◽  
Pascale Vigneron ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
Capillary Barrier

scholarly journals Antimicrobial Activity of Thermocycled Polymethyl Methacrylate Resin Reinforced with Titanium Dioxide and Copper Oxide Nanoparticles

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Rashin Giti ◽  
Kamiar Zomorodian ◽  
Maryam Firouzmandi ◽  
Zahra Zareshahrabadi ◽  
Sedigheh Rahmannasab
Keyword(s):  
Antimicrobial Activity ◽  
Titanium Dioxide ◽  
Copper Oxide ◽  
Tio2 Nanoparticles ◽  
Polymethyl Methacrylate ◽  
Antimicrobial Agents ◽  
Base Material ◽  
Oral Bacteria ◽  
Control Group

Aims. This study aimed to evaluate the effect of 2.5% and 7.5% copper oxide (CuO) and titanium dioxide (TiO2) nanoparticles on the antimicrobial activity of thermocycled polymethyl methacrylate (PMMA) denture base material against standard strains of yeast and bacteria species. Material and Methods. In this in vitro study, 150 disk-shaped (10 × 2 mm) specimens of heat-cured PMMA were prepared and divided into five groups (n = 30) to be reinforced with 2.5% CuO, 7.5% CuO, 2.5% TiO2, or 7.5% TiO2 nanoparticles and a control group (without nanoparticle). The specimens were thermocycled, and their antimicrobial activity was assessed against standard strains of yeast including Candida albicans and C. dubliniensis and oral bacteria species including Streptococcus mutans, S. sobrinus, S. salivarius, and S. sanguis. Data were analyzed with ANOVA and Tukey’s post hoc tests (α = 0.05). Results. Both concentrations of CuO and TiO2 nanoparticles had significant antimicrobial activity against S. salivarius, S. sanguis, and C. dubliniensis compared with the control group ( P  < 0.05). Significant differences existed between both 2.5% ( P  = 0.006) and 7.5% CuO ( P  = 0.005) and the control group against S. mutans. However, TiO2 groups were not significantly different from the control group against S. mutans. Concerning C. albicans, 7.5% TiO2 was the only nanoparticle with significantly higher antimicrobial activity compared with the control group ( P  = 0.043). Conclusions. Both concentrations of CuO and TiO2 were effective antimicrobial agents against S. salivarius, S. sanguis, and C. dubliniensis, and the concentration of CuO was effective against S. mutans. Yet, TiO2 was not much effective. Regarding C. albicans, only 7.5% TiO2 showed efficient antimicrobial activity.

scholarly journals Toxicology of Titanium Dioxide (TiO2) Nanoparticles: In vitro and in vivo evaluation of macrophage uptake of TiO2

2007 ◽  
Vol 21 (6) ◽  
Author(s):  
Terry J Miller ◽  
Alan Knapton ◽  
Oluwafunke O Adeyemo ◽  
Laila S Noory ◽  
James L Weaver ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
In Vivo Evaluation ◽  
Macrophage Uptake

scholarly journals Osseointegrating and phase-oriented micro-arc-oxidized titanium dioxide bone implants

2021 ◽  
Vol 19 ◽  
pp. 228080002110068
Author(s):  
Hsien-Te Chen ◽  
Hsin-I Lin ◽  
Chi-Jen Chung ◽  
Chih-Hsin Tang ◽  
Ju-Liang He
Keyword(s):  
Titanium Dioxide ◽  
High Surface ◽  
Cell Activity ◽  
Active Surface ◽  
Rutile Phase ◽  
Hydroxyl Groups ◽  
Bone Implant ◽  
Implant System

Here, we present a bone implant system of phase-oriented titanium dioxide (TiO2) fabricated by the micro-arc oxidation method (MAO) on β-Ti to facilitate improved osseointegration. This (101) rutile-phase-dominant MAO TiO2 (R-TiO2) is biocompatible due to its high surface roughness, bone-mimetic structure, and preferential crystalline orientation. Furthermore, (101) R-TiO2 possesses active and abundant hydroxyl groups that play a significant role in enhancing hydroxyapatite formation and cell adhesion and promote cell activity leading to osseointegration. The implants had been elicited their favorable cellular behavior in vitro in the previous publications; in addition, they exhibit excellent shear strength and promote bone–implant contact, osteogenesis, and tissue formation in vivo. Hence, it can be concluded that this MAO R-TiO2 bone implant system provides a favorable active surface for efficient osseointegration and is suitable for clinical applications.

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