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Wang Y, Tang S, Ding N, Zhang Z. Biological properties of hydroxyapatite coatings on titanium dioxide nanotube surfaces using negative pressure method. J Biomed Mater Res B Appl Biomater 2023; 111:1365-1373. [PMID: 36826780 DOI: 10.1002/jbm.b.35240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/25/2023]
Abstract
Titanium (Ti) exhibits superior biocompatibility and mechanical properties but is bioinert, while hydroxyapatite (HA) possesses excellent osteogenesis and is widely used for the modification of Ti surface coatings. However, the synthesis of homogeneous and stable HA on metallic materials is still a major challenge. In this study, porous titanium dioxide nanotube arrays were prepared on Ti surface by anodic oxidation, loaded with calcium and phosphorus precursors by negative pressure immersion, and HA coating was formed by in situ crystallization of calcium and phosphorus on the surface by hydrothermal heating. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and bonding strength were conducted to confirm the surface characteristics of each group. The cell proliferation, mineralization degree, and alkaline phosphatase (ALP) activity of MC3T3-E1 cells on samples were calculated and compared in vitro experiments. Cylindrical samples were implanted into rat femurs to evaluate biocompatibility and osteogenesis in vivo. The results showed that HA crystals successfully synthesized in TiO2 nanotubes, enhancing the bonding strength of HA coating and Ti substrate under negative pressure. Moreover, HA coating on Ti substrate remarkably enhanced cell proliferation and osteogenic differentiation activity in vitro, and improved new bone formation as well as osseointegration in vivo.
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Affiliation(s)
- Yan Wang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, China
| | - Shuang Tang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, China
| | - Ning Ding
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, China
| | - Zutai Zhang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, China
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Alves CH, Russi KL, Rocha NC, Bastos F, Darrieux M, Parisotto TM, Girardello R. Host-microbiome interactions regarding peri-implantitis and dental implant loss. Lab Invest 2022; 20:425. [PMID: 36138430 PMCID: PMC9502891 DOI: 10.1186/s12967-022-03636-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 09/12/2022] [Indexed: 11/16/2022]
Abstract
In the last decades, the ortho-aesthetic-functional rehabilitation had significant advances with the advent of implantology. Despite the success in implantology surgeries, there is a percentage of failures mainly due to in loco infections, through bacterial proliferation, presence of fungi and biofilm formation, originating peri-implantitis. In this sense, several studies have been conducted since then, seeking answers to numerous questions that remain unknown. Thus, the present work aims to discuss the interaction between host-oral microbiome and the development of peri-implantitis. Peri-implantitis was associated with a diversity of bacterial species, being Porphiromonas gingivalis, Treponema denticola and Tannerella forsythia described in higher proportion of peri-implantitis samples. In a parallel role, the injury of peri-implant tissue causes an inflammatory response mediated by activation of innate immune cells such as macrophages, dendritic cells, mast cells, and neutrophils. In summary, the host immune system activation may lead to imbalance of oral microbiota, and, in turn, the oral microbiota dysbiosis is reported leading to cytokines, chemokines, prostaglandins, and proteolytic enzymes production. These biological processes may be responsible for implant loss.
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Affiliation(s)
- Carlos Henrique Alves
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil
| | - Karolayne Larissa Russi
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil
| | - Natália Conceição Rocha
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil
| | | | - Michelle Darrieux
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil
| | - Thais Manzano Parisotto
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil
| | - Raquel Girardello
- Laboratório de Microbiologia Molecular E Clínica, Programa de Pós-Graduação Em Ciências da Saúde, Universidade São Francisco, 218, São Francisco Ave., Bragança Paulista, São Paulo, Zip code: # 12916900, Brazil.
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Tang S, Wang Y, Zong Z, Ding N, Zhang Z. Enhanced osteogenic activity of titania-modified zirconia implant by ultraviolet irradiation. Front Bioeng Biotechnol 2022; 10:945869. [PMID: 36003530 PMCID: PMC9393212 DOI: 10.3389/fbioe.2022.945869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022] Open
Abstract
Zirconia is a superior implant material owing to its high mechanical strength, durable corrosion resistance, superior aesthetic effect and excellent biocompatibility. However, the bioactivity of zirconia surfaces remains a great challenge for implant osseointegration. A titania (TiO2) coating was innovatively synthesized on the surface of zirconia by infiltration in a suspension of zirconium oxychloride and titania for dense sintering. Subsequently, the coating was subjected to ultraviolet (UV) light to enhance the biological inertness of zirconia. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and contact angle analysis were conducted to confirm the surface characteristics. Afterwards, in vitro assessments of cell adhesion, proliferation and osteogenic differentiation of MC3T3-E1 cells were performed. Zirconia samples were implanted into rat femurs to assess biocompatibility and host tissue response in vivo. Micro-CT evaluation and histological testing were conducted. After UV irradiation, the content of hydroxyl groups and hydrophilicity of TiO2-modified zirconia were significantly increased. The results of in vitro experiments showed that TiO2-modified zirconia subjected to UV light could promote cell proliferation and spreading, enhance ALP activity and the degree of mineralization, and upregulate osteogenesis-related genes. Furthermore, in vivo assessments confirmed that UV-irradiated TiO2-modified zirconia implants maximized the promotion of osseointegration. TiO2-modified zirconia after UV treatment will have broad clinical application prospects in improving the osseointegration of zirconia implants.
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