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Ichioka Y, Kado T, Mashima I, Nakazawa F, Endo K, Furuichi Y. Effects of chemical treatment as an adjunctive of air-abrasive debridement on restoring the surface chemical properties and cytocompatibility of experimentally contaminated titanium surfaces. J Biomed Mater Res B Appl Biomater 2019; 108:183-191. [PMID: 30957972 DOI: 10.1002/jbm.b.34377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 02/25/2019] [Accepted: 03/20/2019] [Indexed: 11/08/2022]
Abstract
The aim of this study was to evaluate the effects of three different chemotherapeutic agents, following air-abrasive debridement, on surface chemical properties and cytocompatibility. Disks contaminated with Streptococcus gordonii biofilm were treated with air-abrasion and immersion in either 0.9% NaCl (Air + NaCl), 0.05% alkaline electrolyzed water (AEW) (Air + AEW), or 3% H2 O2 (Air + H2 O2 ). Noncontaminated and untreated titanium disks served as a control (As-polished). The efficacy of biofilm removal, magnitude of initial cytocompatibility toward human bone marrow mesenchymal stem cells, and surface chemical properties were determined. In all treatment groups, biofilms containing microorganisms were observed to be completely removed. The data showed discrepancies for cell affinities among treatment groups, whereby: (1) the number of cells attached to the Air + AEW treated surfaces was approximately two times greater than that to the Air + NaCl treated surfaces; and (2) cell spreading was significantly enhanced on the Air + AEW treated surfaces compared with the Air + NaCl or Air + H2 O2 treated surfaces. X-ray photoelectron spectroscopy data showed that the mean relative concentrations of nitrogen to titanium on the As-polished, Air + NaCl, Air + AEW, and Air + H2 O2 surfaces were 0.0079, 0.0237, 0.0071, and 0.0210, respectively, which would provide a clear understanding that these discrepancies could be attributed to sufficient removals of organic-nitrogen deposits at the same magnitude as the As-polished following the Air + AEW treatment. This study clarifies that chemical surface treatment with AEW, as an adjunctive to air-abrasive debridement may be beneficial in restoring surface properties for tissue integration. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 108B:183-191, 2020.
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Affiliation(s)
- Yuki Ichioka
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan
| | - Takashi Kado
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan
| | - Izumi Mashima
- Postdoctoral Fellow of Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, Japan.,Department of Oral Microbiology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan.,Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, New York
| | - Futoshi Nakazawa
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, New York
| | - Kazuhiko Endo
- Division of Biomaterials and Bioengineering, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan
| | - Yasushi Furuichi
- Division of Periodontology and Endodontology, Department of Oral Rehabilitation, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan
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152
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TiO 2 Coating and UV Photofunctionalization Enhance Blood Coagulation on Zirconia Surfaces. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8078230. [PMID: 31058193 PMCID: PMC6463630 DOI: 10.1155/2019/8078230] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 02/27/2019] [Accepted: 03/11/2019] [Indexed: 12/14/2022]
Abstract
This in vitro study was designed to evaluate the effect of sol-gel derived TiO2 coating on blood coagulation, blood protein adsorption, and platelet response on zirconia surfaces. Square-shaped zirconia (n=96) (10x10x2 mm) was cut, ground, sintered, and finally cleansed ultrasonically in each of acetone and ethanol for 5 minutes. Three experimental groups (n=32) were fabricated: (a) zirconia coated with sol-gel derived TiO2, (b) zirconia coated with sol-gel derived TiO2 and treated with ultraviolet (UV) irradiation for 1 hour, and (c) non-coated zirconia as control. The coatings were prepared from tetraisopropyl orthotitanate solution by dip-coating. The thrombogenicity of the specimens was evaluated using a whole blood kinetic clotting time method where the extent of blood clotting was evaluated at 10, 20, 30, 40, 50, and 60 minutes (n=4/time point, total n=24/group). Scanning electron microscope images were taken to observe platelet morphologies after 1-hour incubation with platelet-rich plasma (PRP) (n=5/group). Surface characteristics were visualized using atomic force microscopy (n=1/group). Adsorption of plasma proteins and fibronectin on each surface was studied by gel electrophoresis (n=2/group). Significant differences were observed in blood coagulation between the test groups at 20-, 30-, 40-, and 50-minute time points (p<0.005). UV treated TiO2 coated specimens showed fastest blood coagulation followed by TiO2 coated and non-coated specimens. Furthermore, platelets appeared at a higher activation state on coated specimens. Gel electrophoresis revealed no difference in protein adsorption among the experimental groups. In summary, TiO2 coatings promoted blood coagulation, and it was further enhanced by UV treatment, which has the potential to hasten the wound healing process in vivo.
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153
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Liu W, Du B, Zhou L, Wang Q, Wu J. Ultraviolet Functionalization Improved Bone Integration on Titanium Surfaces by Fluorescent Analysis in Rabbit Calvarium. J ORAL IMPLANTOL 2019; 45:107-115. [PMID: 30540542 DOI: 10.1563/aaid-joi-d-17-00009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study evaluated the effect of ultraviolet functionalization (UV) on bone integration ability in rabbit model, using epifluorescence microscopy. Each of 12 rabbits (n = 6) received randomly four titanium domes prepared with or without ultraviolet for 48 hours (UVC, λ = 250 ± 20 nm; Philips, Tokyo, Japan): (1) turned surface (T), (2) turned surface with UV (T-UV), (3) sandblasted (120 μm aluminum oxide) and etched by 18% hydrochloric acid and 49% sulphuric acid at 60°C for 30 min (SLA) and (4) SLA surface with UV (SLA-UV). Fluorochrome bone labels were marked by oxytetracycline at 25 mg/kg on 13th days and 14th days and calcein at 5 mg/kg on 3th days and 4th days before euthanization. The study samples were sacrified at 2 weeks and 4 weeks. The undecalcified specimens were prepared. The newly formed total bone of cross-sectional area (TB, %), the mineralized trabecular bone of cross-sectional area (MB, %), and the new bone and dome contact (BDC, %) were measured and analyzed by fluorescence microscope and Image Pro Express 6.0. The data of MB and TB showed new bone regeneration was increased in all groups, but no signs of difference were found. However, the means BDC of UV treatment on turned surface at 4 weeks, the UV treated on SLA surface at 2 weeks and 4 weeks were statistically significantly higher than the control group (P < .05). Within the limitations of the study, it can be concluded that ultraviolet functionalization on the titanium surface could enhance the new bone tissues and titanium surface integration.
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Affiliation(s)
- Weizhen Liu
- Department of Periodontics, Stomatological Hospital, Southern Medical University (Guangdong Stomatological Hospital), Guangzhou, Guangdong, China
| | - Bing Du
- Center of Stomatology, The Second People's Hospital of Foshan, Foshan, Guangdong, China
| | - Lei Zhou
- Center of Oral Implantology, Stomatological Hospital, Southern Medical University (Guangdong Stomalogical Hospital), Guangzhou, Guangdong, China
| | - Qin Wang
- Department of Oral Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Jingyi Wu
- Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong, China
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154
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Maintenance and Restoration Effect of the Surface Hydrophilicity of Pure Titanium by Sodium Hydroxide Treatment and its Effect on the Bioactivity of Osteoblasts. COATINGS 2019. [DOI: 10.3390/coatings9040222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In recent years, studies on the surface of titanium implants have shown that hydrophilic properties have a positive effect on bone binding, warranting further investigation into the maintenance and restoration of hydrophilic properties. In this work, a hydrophilic surface was obtained by plasma oxidation on the surface of sandblasted and acid-etched (SLA) titanium discs. We aimed to determine the effect of sodium hydroxide (NaOH) treatment on the maintenance and restoration of the surface hydrophilicity of titanium discs, as well as the relationship between the changes in hydrophilic properties on titanium surfaces and their biological properties. The results show that the treatment of hydrophilic surfaces with SLA, plasma oxidation, and NaOH treatments tend to enhance the early stages of cell adhesion, proliferation, and differentiation. Those results provide important guidance that SLA, plasma oxidation, and NaOH treatments can be used to restore the hydrophilic property of Ti that has been stored under room temperature and atmospheric pressure conditions.
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155
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Hydroxyl radicals generated by hydrogen peroxide photolysis recondition biofilm-contaminated titanium surfaces for subsequent osteoblastic cell proliferation. Sci Rep 2019; 9:4688. [PMID: 30886168 PMCID: PMC6423011 DOI: 10.1038/s41598-019-41126-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 02/27/2019] [Indexed: 12/31/2022] Open
Abstract
Titanium dental implants have been successfully used for decades; however, some implants are affected by peri-implantitis due to bacterial infection, resulting in loss of supporting bone. This study aimed to evaluate the effect of an antimicrobial chemotherapy employing H2O2 photolysis-developed to treat peri-implantitis-on biofilm-contaminated titanium surfaces in association with osteoblastic cell proliferation on the treated surface. Titanium discs were sandblasted and acid-etched, followed by contamination with a three-species biofilm composed of Porphyromonas gingivalis, Fusobacterium nucleatum, and Streptococcus mitis. This biofilm model was used as a simplified model of clinical peri-implantitis biofilm. The discs were subjected to ultrasound scaling, followed by H2O2 photolysis, wherein 365-nm LED irradiation of the disc immersed in 3% H2O2 was performed for 5 min. We analysed proliferation of mouse osteoblastic cells (MC3T3-E1) cultured on the treated discs. Compared with intact discs, biofilm contamination lowered cell proliferation on the specimen surface, whereas H2O2 photolysis recovered cell proliferation. Thus, H2O2 photolysis can recover the degraded biocompatibility of biofilm-contaminated titanium surfaces and can potentially be utilised for peri-implantitis treatment. However, to verify the findings of this study in relation to clinical settings, assessment using a more clinically relevant multi-species biofilm model is necessary.
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156
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Comparison of low-pressure oxygen plasma and chemical treatments for surface modifications of Ti6Al4V. Biodes Manuf 2019. [DOI: 10.1007/s42242-019-00036-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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157
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Hirota M, Ikeda T, Sugita Y, Ishijima M, Hirota S, Ogawa T. Impaired osteoblastic behavior and function on saliva-contaminated titanium and its restoration by UV treatment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:165-177. [PMID: 30948050 DOI: 10.1016/j.msec.2019.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 03/01/2019] [Accepted: 03/03/2019] [Indexed: 01/19/2023]
Abstract
The objective of this study was to examine behavior and function of osteoblasts on saliva-contaminated titanium and its potential improvement after UV light treatment. Acid-etched titanium disks were contaminated with human saliva. Osteoblasts derived from rat femur were cultured on contaminated and clean titanium disks. Contaminated disks further treated with UV light were also tested. The number of attached cells, the degree of cell spreading, and the expression of adhesion protein were significantly decreased on saliva-contaminated surfaces compared with clean surfaces. The gene expression of osteocalcin was also downregulated on contaminated surfaces, whereas ALP activity and mineralization were not significantly influenced. The impaired functions on contaminated surfaces were significantly increased if the surfaces were further treated with UV and even outperformed the ones on clean titanium surfaces. XPS analysis revealed that the atomic percentage of carbon and nitrogen detected on contaminated surfaces were substantially decreased after UV treatment. These results suggest that osteoblastic behavior and function were compromised on titanium surfaces contaminated with saliva. The compromised functions no longer happened if the surfaces were further treated with UV light, providing the basis to understand the effect of biological contamination on osseointegration and to explore UV treatment as a decontaminating technology.
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Affiliation(s)
- Makoto Hirota
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America; Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Japan.
| | - Takayuki Ikeda
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America
| | - Yoshihiko Sugita
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America
| | - Manabu Ishijima
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America
| | - Satoko Hirota
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America
| | - Takahiro Ogawa
- Laboratory for bone and implant Sciences, The Jane and Jerry Weintraub center for reconstructive biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, United States of America
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158
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In Vitro and In Vivo Evaluation of Titanium Surface Modification for Biological Aging by Electrolytic Reducing Ionic Water. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9040713] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, using electrolytic reducing ionic water (S-100®), a novel surface treatment method safely and easily modifying the surface properties was evaluated in vitro and in vivo. Ti-6Al-4V disks were washed and the disks were kept standing on a clean bench for one and four weeks for aging. These disks were immersed in S-100® (S-100 group), immersed in ultra-pure water (Control group), or irradiated with ultraviolet light (UV group), and surface analysis, cell experiment, and animal experiment were performed using these disks. The titanium surface became hydrophilic in the S-100 group and the amount of protein adsorption and cell adhesion rate were improved in vitro. In vivo, new bone formation was noted around the disk. These findings suggested that surface treatment with S-100® adds bioactivity to the biologically aged titanium surface. We are planning to further investigate it and accumulate evidence for clinical application.
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159
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Harder S, Quabius ES, Meinke F, Mehl C, Kern M. Changes in proinflammatory gene expression in human whole blood after contact with UV-conditioned implant surfaces. Clin Oral Investig 2019; 23:3731-3738. [PMID: 30666479 DOI: 10.1007/s00784-019-02801-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 01/10/2019] [Indexed: 12/27/2022]
Abstract
OBJECTIVES The aim of this in vitro study was to assess changes in the gene expression of proinflammatory cytokines in human whole blood after contact with titanium implant surfaces conditioned by UV light. To this end, expression levels of proinflammatory cytokines were analyzed in vitro in human whole blood. MATERIALS AND METHODS Dental implants made of grade 4 titanium were conditioned by UV light in a UV device and submerged in human whole blood. Unconditioned implants served as controls, and blood samples without implants served as the negative control group. Sampling was performed at 1, 8, and 24 h. Changes in the expression levels of interleukin-1β (IL1B) and tumor necrosis factor alpha (TNF) were assessed using RT-qPCR at the mRNA level. RESULTS The gene expression of IL1B was significantly suppressed in the test group over the observation period compared to the control group during the 1-8 h after having contact between the implant surface and the blood. The gene expression of TNF was not significantly altered by UV conditioning after 1 and 8 h of observation, but both cytokine expression levels were increased significantly after 24 h. CONCLUSIONS Differences in the gene expression of proinflammatory cytokines after insertion of UV-conditioned titanium implants can be assessed using a human whole blood test. UV-conditioned implant surfaces apparently suppress the release of IL1B in vitro. CLINICAL RELEVANCE The results of our publication demonstrate that modulation of the early inflammatory response in human whole blood is possible by surface treatment with UV light. In particular, the suppression of IL1B expression, especially after the initial contact of blood cells, may be beneficial in the osseointegration of titanium implants by positively influence the balance between rejection and acceptance of an implant.
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Affiliation(s)
- Sönke Harder
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University Kiel, Arnold-Heller Str. 16, 24105, Kiel, Germany.
| | - Elgar Susanne Quabius
- Institute of Immunology, Christian-Albrechts University Kiel, Kiel, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, Christian-Albrechts University Kiel, Kiel, Germany
| | - Fabian Meinke
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University Kiel, Arnold-Heller Str. 16, 24105, Kiel, Germany
| | - Christian Mehl
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University Kiel, Arnold-Heller Str. 16, 24105, Kiel, Germany
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University Kiel, Arnold-Heller Str. 16, 24105, Kiel, Germany
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160
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Biological and Physicochemical Characteristics of 2 Different Hydrophilic Surfaces Created by Saline-Storage and Ultraviolet Treatment. IMPLANT DENT 2019; 27:405-414. [PMID: 29851661 DOI: 10.1097/id.0000000000000773] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Hydrophilicity/hydrophobicity of titanium surfaces may affect osseointegration. Ordinary titanium surfaces are hydrophobic. Recently, 2 different methods of storing titanium in saline solution or treating it with ultraviolet (UV) light were introduced to generate surface hydrophilicity. This study compared biological and physicochemical properties of 2 different hydrophilic titanium surfaces created by these methods. MATERIALS Acid-etched control, saline-stored, and UV-treated titanium surfaces were assessed by scanning electron microscopy, energy dispersive spectroscopy, and x-ray photoelectron spectroscopy. The attachment, spreading behaviors, mineralization, and gene expression of osteoblasts were examined. RESULTS Similar microroughness was found on control and UV-treated surfaces, whereas foreign deposits were observed on saline-stored surfaces. Control and UV-treated surfaces consisted of Ti, O, and C, whereas saline-stored surfaces showed Na and Cl in addition to these 3 elements. Atomic percentage of surface carbon was higher in order of control, saline-stored, and UV-treated surfaces. Osteoblasts cultured on saline-stored surfaces showed higher levels of calcium deposition and collagen I expression than control. Osteoblasts on UV-treated surfaces showed significantly increased levels for all parameters related to cell attachment, cell spreading, the expression of adhesion and cytoskeletal proteins, mineralization, and gene expression compared with control, outperforming saline-stored surfaces for most parameters. CONCLUSION Despite similar hydrophilicity, saline-stored and UV light-treated surfaces showed substantially different biological effects on osseointegration, associated with different surface chemistry and morphology.
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161
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Early Biofilm Formation on UV Light Activated Nanoporous TiO 2 Surfaces In Vivo. Int J Biomater 2019; 2018:7275617. [PMID: 30595694 PMCID: PMC6282137 DOI: 10.1155/2018/7275617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 11/08/2018] [Indexed: 12/22/2022] Open
Abstract
Purpose To explore early S. mutans biofilm formation on hydrothermally induced nanoporous TiO2 surfaces in vivo and to examine the effect of UV light activation on the biofilm development. Materials and Methods Ti-6Al-4V titanium alloy discs (n = 40) were divided into four groups with different surface treatments: noncoated titanium alloy (NC); UV treated noncoated titanium alloy (UVNC); hydrothermally induced TiO2 coating (HT); and UV treated titanium alloy with hydrothermally induced TiO2 coating (UVHT). In vivo plaque formation was studied in 10 healthy, nonsmoking adult volunteers. Titanium discs were randomly distributed among the maxillary first and second molars. UV treatment was administered for 60 min immediately before attaching the discs in subjects' molars. Plaque samples were collected 24h after the attachment of the specimens. Mutans streptococci (MS), non-mutans streptococci, and total facultative bacteria were cultured, and colonies were counted. Results The plaque samples of NC (NC + UVNC) surfaces showed over 2 times more often S. mutans when compared to TiO2 surfaces (HT + UVHT), with the number of colonized surfaces equal to 7 and 3, respectively. Conclusion This in vivo study suggested that HT TiO2 surfaces, which we earlier showed to improve blood coagulation and encourage human gingival fibroblast attachment in vitro, do not enhance salivary microbial (mostly mutans streptococci) adhesion and initial biofilm formation when compared with noncoated titanium alloy. UV light treatment provided Ti-6Al-4V surfaces with antibacterial properties and showed a trend towards less biofilm formation when compared with non-UV treated titanium surfaces.
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162
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Karthigeyan S, Ravindran AJ, Bhat RTR, Nageshwarao MN, Murugesan SV, Angamuthu V. Surface Modification Techniques for Zirconia-Based Bioceramics: A Review. J Pharm Bioallied Sci 2019; 11:S131-S134. [PMID: 31198324 PMCID: PMC6555344 DOI: 10.4103/jpbs.jpbs_45_19] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Zirconia is gaining interest as a ceramic biomaterial for implant applications due to its biocompatibility and desirable mechanical properties. At present, zirconia-based bioceramics is often seen in the applications of hip replacement and dental implants. This article briefly reviews different surface modification techniques that have been applied to zirconia such as polishing, sandblasting, acid etching, biofunctionalization, coating, laser treatment, and ultraviolet light treatment. The potential of surface modification to make zirconia a successful implant material in the future is highly dependent on the establishment of successful in vitro and in vivo studies. Hence, further effort should be made in order to deepen the understanding of tissue response to implant and tissue regeneration process.
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Affiliation(s)
- Suma Karthigeyan
- Department of Prosthodontics, Rajah Mutiah Dental College, Madurai, Tamil Nadu, India
| | | | - Ramesh T R Bhat
- Department of Prosthodontics, Best Dental Science College, Madurai, Tamil Nadu, India
| | | | - Sree Varun Murugesan
- Department of Prosthodontics, Best Dental Science College, Madurai, Tamil Nadu, India
| | - Vignesswary Angamuthu
- Department of Oral Medicine and Radiology, Best Dental Science College, Madurai, Tamil Nadu, India
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163
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Kim S, Bark CW, Van Quy H, Seo S, Lim J, Lee J, Suh J, Lee Y, Um H, Kim Y. Photofunctionalizing effects of hydroxyapatite combined with TiO
2
on bone regeneration in rabbit calvarial defects. J Biomed Mater Res B Appl Biomater 2018; 107:1953-1959. [DOI: 10.1002/jbm.b.34288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/12/2018] [Accepted: 11/04/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Shin‐Young Kim
- Department of PeriodontologySchool of Dentistry, Kyungpook National University Daegu 41940 Republic of Korea
| | - Chung Wung Bark
- Department of Electrical EngineeringGachon University, Seongnam Gyeonggi 13120 Republic of Korea
| | - Hoang Van Quy
- Department of Electrical EngineeringGachon University, Seongnam Gyeonggi 13120 Republic of Korea
| | - Seung‐Jun Seo
- Department of PeriodontologySchool of Dentistry, A3DI, Kyungpook National University Daegu 41940 Republic of Korea
| | - Jae‐Hong Lim
- Industrial Technology Convergence Center, Pohang Accelerator Laboratory, POSTECH Pohang 37673 Gyeongbuk Republic of Korea
| | - Jae‐Mok Lee
- Department of PeriodontologySchool of Dentistry, Kyungpook National University Daegu 41940 Republic of Korea
| | - Jo‐Young Suh
- Department of PeriodontologySchool of Dentistry, Kyungpook National University Daegu 41940 Republic of Korea
| | - Youngkyun Lee
- Department of BiochemistrySchool of Dentistry, Kyungpook National University Daegu 41940 Republic of Korea
| | - Heung‐Sik Um
- Department of PeriodontologyResearch Institute for Oral Sciences, College of Dentistry, Gangneung‐Wonju National University Gangneung 25457 Republic of Korea
| | - Yong‐Gun Kim
- Department of PeriodontologySchool of Dentistry, Kyungpook National University Daegu 41940 Republic of Korea
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164
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Yuan Z, Liu P, Hao Y, Ding Y, Cai K. Construction of Ag-incorporated coating on Ti substrates for inhibited bacterial growth and enhanced osteoblast response. Colloids Surf B Biointerfaces 2018; 171:597-605. [DOI: 10.1016/j.colsurfb.2018.07.064] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 07/03/2018] [Accepted: 07/27/2018] [Indexed: 10/28/2022]
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165
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Jeong WS, Kwon JS, Choi EH, Kim KM. The Effects of Non-Thermal Atmospheric Pressure Plasma treated Titanium Surface on Behaviors of Oral Soft Tissue Cells. Sci Rep 2018; 8:15963. [PMID: 30374034 PMCID: PMC6206130 DOI: 10.1038/s41598-018-34402-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 10/12/2018] [Indexed: 02/01/2023] Open
Abstract
Here, we investigated the possible use of the technology known as non-thermal atmospheric pressure plasma on integration and control of cytokine release of soft tissue on titanium surface. After NTAPP was applied to titanium samples, changes of surface characteristics were measured as topographical features, contact angle, surface tension, and with X-ray photoelectron spectroscopy (XPS). Protein absorption was evaluated using a bovine serum albumin absorption assay. The attachment, viability, morphology, proliferation, and cytokine release of soft tissue on titanium were assessed. No change in topographical features was observed between control and NTAPP-treated groups. However, NTAPP treatment resulted in significant lowering of the contact angle for polar and non-polar liquids and increase of surface tension. Protein absorption was significantly enhanced on the NTAPP-treated samples. Normal soft tissue attachment was improved on the NTAPP-treated groups with good viability. Cellular morphology was improved in NTAPP-treated groups whereas cellular proliferation was not enhanced. There was a significant reduction in the amounts of cytokine release for inflamed IHOK and hTERT-hNOF on the NTAPP-treated groups; except for IL-8 for IHOKs. This study demonstrates that surface functional consequences by NTAPP exposure enhanced behavior of oral soft tissue cells without topographical change.
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Affiliation(s)
- Won-Seok Jeong
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, Korea.,BK21 Plus Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, Korea
| | - Jae-Sung Kwon
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, Korea
| | - Eun-Ha Choi
- Plasma Bioscience Research Center, Kwangwoon University, Seoul, 01897, Korea
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, Korea. .,BK21 Plus Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seodaemungu, Seoul, 03722, Korea.
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166
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Mehl C, Kern M, Neumann F, Bähr T, Wiltfang J, Gassling V. Effect of ultraviolet photofunctionalization of dental titanium implants on osseointegration. J Zhejiang Univ Sci B 2018; 19:525-534. [PMID: 29971991 DOI: 10.1631/jzus.b1600505] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The aim of the current study was to evaluate the effect of ultraviolet (UV) photofunctionalization of dental titanium implants with exposure to the oral cavity on osseointegration in an animal model. METHODS Forty-eight titanium implants (Camlog® Conelog® 4.3 mmx9.0 mm) were placed epicrestally into the edentulous jaws of three minipigs and implant stability was assessed by measuring the implant stability quotient (ISQ). Prior to implantation half of the implants were photofunctionalized with intense UV-light. After three months, the implants were exposed and ISQ was measured again. After six months of implant exposure, the minipigs were sacrificed and the harvested specimens were analyzed using histomorphometric, light, and fluorescence microscopy. MAIN RESULTS Forty-two of 48 implants osseointegrated. The overall mean bone-implant contact area (BIC) was (64±22)%. No significant differences were found in BIC or ISQ value (multivariate analysis of variance (MANOVA), P>0.05) between implants with and without exposure to UV photofunctionalization. CONCLUSIONS No significant effects were observed on osseointegration of dental titanium implants nine months after exposure of UV photofunctionalization.
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Affiliation(s)
- Christian Mehl
- Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105, Kiel, Germany
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105, Kiel, Germany
| | - Friederike Neumann
- Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105, Kiel, Germany
| | - Telse Bähr
- Private Practice, Lassabeker Weg 3, 24211, Lehmkuhlen, Germany
| | - Jörg Wiltfang
- Department of Oral and Maxillofacial Surgery, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105, Kiel, Germany
| | - Volker Gassling
- Department of Oral and Maxillofacial Surgery, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105, Kiel, Germany
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167
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Elkhidir Y, Lai R, Feng Z. The impact of photofunctionalized gold nanoparticles on osseointegration. Heliyon 2018; 4:e00662. [PMID: 30094359 PMCID: PMC6077240 DOI: 10.1016/j.heliyon.2018.e00662] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/10/2018] [Accepted: 06/18/2018] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES The aims of this study were to create a new surface topography using simulated body fluids (SBF) and Gold Nanoparticles (GNPs) and then to assess the influence of UV Photofunctionalization (PhF) on the osteogenic capacity of these surfaces. MATERIALS AND METHODS Titanium plates were divided into six groups All were acid etched with 67% Sulfuric acid, 4 were immersed in SBF and 2 of these were treated with 10 nm GNPs. Half of the TiO2 plates were photofunctionalized to be compared with the non-PhF ones. Rat's bone marrow stem cells were seeded into the plates and then CCK8 assay, cell viability assay, immunofluorescence, and Scanning electron microscopy (SEM) were done after 24 hours. Gene expression analysis was done using real time quantitative PCR (qPCR) one week later to check for the mRNA expression of Collagen-1, Osteopontin and Osteocalcin. Alkaline phosphatase (ALP) activity was assessed after 2 weeks of cell seeding. RESULTS Our new topography has shown remarkable osteogenic potential. The new surface was the most biocompatible, and the 10 nm GNPs did not show any cytotoxicity. There was a significant increase in bioactivity, enhanced gene expressions and ALP activity. CONCLUSIONS GNPs enhances osteogenic differentiation of stem cells and Photofunctionalizing GNPs highly increases this. We have further created a novel highly efficient topography which highly enhances the speed and extent of osseointegration. This may have great potential for improving treatment outcomes for implant, maxillofacial as well as orthopedic patients.
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Affiliation(s)
| | | | - Zhiqiang Feng
- Implant Department – Suihua, The First Affiliated Stomatological Hospital of Jinan University, PR China
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168
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Kumasaka T, Ohno A, Hori N, Hoshi N, Maruo K, Kuwabara A, Seimiya K, Toyoda M, Kimoto K. Influence of ultraviolet irradiation treatment on porcelain bond strength of titanium surfaces. Dent Mater J 2018; 37:422-428. [PMID: 29375090 DOI: 10.4012/dmj.2016-417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To determine the effect of titanium (Ti) surface modification by ultraviolet irradiation (UVI) on the bond strength between Ti and porcelain. Grade 2 Ti plates were allotted to five groups: sandblasted (SA), 15 min UVI (UV), SA+5 min UVI (SA+UV5), SA+10 min UVI (SA+UV10), and SA+15 min UVI (SA+UV15). After surface treatment, porcelain was added. A precious metal (MC) was used for comparison with Ti. The effects of 24-h storage at room temperature versus thermal cycling only at 5 and 55°C in water were evaluated. Subsequently, the tensile strength of each sample was tested. Data were analyzed using one-way analysis of variance and the Tukey test. In both the room temperature and thermal cycling groups, the MC and SA+15 min UVI samples showed significantly greater bond strengths than the other samples (p<0.05). UVI processing efficiently increases the bond strength between porcelain and the Ti surface.
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Affiliation(s)
- Tomonari Kumasaka
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Akinori Ohno
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Norio Hori
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Noriyuki Hoshi
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Katsuichiro Maruo
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | - Atsushi Kuwabara
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University
| | | | | | - Katsuhiko Kimoto
- Division of Prosthodontics and Oral Rehabilitation, Department of Oral Function and Restoration, Graduate School of Dentistry, Kanagawa Dental University.,Department of Dental Laboratory, Kanagawa Dental University
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169
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Rezaei NM, Hasegawa M, Ishijima M, Nakhaei K, Okubo T, Taniyama T, Ghassemi A, Tahsili T, Park W, Hirota M, Ogawa T. Biological and osseointegration capabilities of hierarchically (meso-/micro-/nano-scale) roughened zirconia. Int J Nanomedicine 2018; 13:3381-3395. [PMID: 29922058 PMCID: PMC5997135 DOI: 10.2147/ijn.s159955] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
PURPOSE Zirconia is a potential alternative to titanium for dental and orthopedic implants. Here we report the biological and bone integration capabilities of a new zirconia surface with distinct morphology at the meso-, micro-, and nano-scales. METHODS Machine-smooth and roughened zirconia disks were prepared from yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), with rough zirconia created by solid-state laser sculpting. Morphology of the surfaces was analyzed by three-dimensional imaging and profiling. Rat femur-derived bone marrow cells were cultured on zirconia disks. Zirconia implants were placed in rat femurs and the strength of osseointegration was evaluated by biomechanical push-in test. RESULTS The rough zirconia surface was characterized by meso-scale (50 µm wide, 6-8 µm deep) grooves, micro-scale (1-10 µm wide, 0.1-3 µm deep) valleys, and nano-scale (10-400 nm wide, 10-300 nm high) nodules, whereas the machined surface was flat and uniform. The average roughness (Ra) of rough zirconia was five times greater than that of machined zirconia. The expression of bone-related genes such as collagen I, osteopontin, osteocalcin, and BMP-2 was 7-25 times upregulated in osteoblasts on rough zirconia at the early stage of culture. The number of attached cells and rate of proliferation were similar between machined and rough zirconia. The strength of osseointegration for rough zirconia was twice that of machined zirconia at weeks two and four of healing, with evidence of mineralized tissue persisting around rough zirconia implants as visualized by electron microscopy and elemental analysis. CONCLUSION This unique meso-/micro-/nano-scale rough zirconia showed a remarkable increase in osseointegration compared to machine-smooth zirconia associated with accelerated differentiation of osteoblasts. Cell attachment and proliferation were not compromised on rough zirconia unlike on rough titanium. This is the first report introducing a rough zirconia surface with distinct hierarchical morphology and providing an effective strategy to improve and develop zirconia implants.
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Affiliation(s)
- Naser Mohammadzadeh Rezaei
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Masakazu Hasegawa
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Manabu Ishijima
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Kourosh Nakhaei
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Takahisa Okubo
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Takashi Taniyama
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Amirreza Ghassemi
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Tania Tahsili
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Wonhee Park
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Makoto Hirota
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
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170
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Areid N, Peltola A, Kangasniemi I, Ballo A, Närhi TO. Effect of ultraviolet light treatment on surface hydrophilicity and human gingival fibroblast response on nanostructured titanium surfaces. Clin Exp Dent Res 2018; 4:78-85. [PMID: 29955391 PMCID: PMC6010723 DOI: 10.1002/cre2.108] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 03/04/2018] [Accepted: 04/02/2018] [Indexed: 01/19/2023] Open
Abstract
This study was designed to investigate the effect of nanostructured TiO2 coatings on human gingival fibroblast and to explore the influence of ultraviolet (UV) light on surface wettability and cellular response. Ti-6Al-4V titanium alloy discs (n = 96) were divided into three groups: a sol-gel-derived MetAlive™ (MA) coating; hydrothermal (HT) coating; and a non-coated (NC) group. Forty-eight titanium substrates were further treated with UV light for 15 min. The water contact angles of the substrates were measured using the sessile drop method. Human gingival fibroblasts were used to evaluate the cell adhesion strength and cell proliferation on experimental surfaces. The strength of cell adhesion against enzymatic detachment was studied after 6 hr of adhesion using gentle trypsinization for 15 min at room temperature. A fluorescence microscope was used for cell imaging (Zeiss-stereo-lumar-v12), and images were analyzed for cell counting, and the percentage of detached cells were calculated. The proliferation of cultured cells up to 10 days was determined according to the cell activity using Alamar Blue™assay. The HT group had the lowest contact angle value (31.1°) followed by MetAlive™ (35.3°), whereas the NC group had the highest contact angle (50.3°). After UV light treatment, all surfaces become considerably more hydrophilic. There was a significant difference in the amount of adherent cells between sol-gel and HT groups when compared with the NC group (p < .05) with detachment percentages of 35.8%, 36.4%, and 70.7%, respectively. All substrate types showed an increase in cell proliferation rate until 10 days. It can be concluded that nanostructured titanium oxide implant surfaces, obtained by sol-gel and HT coating methods, enhance the surface wettability and improve human gingival fibroblast function in terms of adhesion and proliferation rate when compared with non-coated surfaces. UV light treatment clearly enhances the wettability of all titanium surfaces.
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Affiliation(s)
- Nagat Areid
- Department of Prosthetic Dentistry, Stomatognathic PhysiologyUniversity of TurkuTurkuFinland
| | - Ari Peltola
- Turku Clinical Biomaterials CentreUniversity of TurkuTurkuFinland
| | | | - Ahmed Ballo
- Division of Prosthodontics and Dental Geriatrics, Department of Oral Health Sciences, Faculty of DentistryUniversity of British ColumbiaBCCanada
| | - Timo O. Närhi
- Department of Prosthetic Dentistry, Stomatognathic PhysiologyUniversity of TurkuTurkuFinland
- Department of Oral and Maxillofacial DiseaseTurku University HospitalTurkuFinland
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171
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Areid N, Kangasniemi I, Söderling E, Närhi TO. Ultraviolet photofunctionalization of nanostructured titanium surfaces enhances thrombogenicity and platelet response. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:56. [PMID: 29728865 DOI: 10.1007/s10856-018-6067-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 04/18/2018] [Indexed: 05/28/2023]
Abstract
The purpose of this study was to evaluate blood and platelet response to nanostructured TiO2 coatings and to investigate the effect of Ultraviolet (UV) light treatment on blood clotting ability, platelet activation and protein adhesion. Ti-6Al-4V titanium alloy plates (n = 138) were divided into three groups; a sol-gel derived MetAliveTM coating (MA); hydrothermal coating (HT); and a non-coated group (NC). Sixty nine titanium substrates were further treated with UV light for 1 h. The thrombogenicity of the titanium substrates was assessed using fresh human blood with a whole blood kinetic clotting time method. The platelet adhesion test was conducted to evaluate the morphology and adhesion behavior of the platelets on the titanium substrates. Human diluted plasma and bovine fibronectin were used to evaluate protein adsorption. Total clotting time for the UV treated HT, MA and NC titanium substrates was almost 40 min compared to 60 min for non-UV substrates, the total clotting time for the UV treated groups were significantly lower than that of the non UV NC group (p < 0.05). UV light treatment had significantly enhanced coagulation rates. The HT and MA substrates presented more platelet aggregation, spreading and pseudopod formation in comparison with the NC substrates. UV treatment did not affect the platelet activation and protein adsorption. This in vitro study concluded that nanostructured titanium dioxide implant surfaces obtained by sol-gel and hydrothermal coating methods increased coagulation rates and enhanced platelet response when compared with non-coated surfaces. UV light treatment clearly improved thrombogenicity of all examined Ti-6Al-4V surfaces.
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Affiliation(s)
- Nagat Areid
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland.
| | - Ilkka Kangasniemi
- Turku Clinical Biomaterials Centre, University of Turku, Turku, Finland
| | - Eva Söderling
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Timo O Närhi
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland
- Department of Oral and Maxillofacial Diseases, Turku University Hospital, Turku, Finland
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172
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Yuan X, Kang Y, Zuo J, Xie Y, Ma L, Ren X, Bian Z, Wei Q, Zhou K, Wang X, Yu Z. Micro/nano hierarchical structured titanium treated by NH4OH/H2O2 for enhancing cell response. PLoS One 2018; 13:e0196366. [PMID: 29723214 PMCID: PMC5933712 DOI: 10.1371/journal.pone.0196366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 04/11/2018] [Indexed: 01/08/2023] Open
Abstract
In this paper, two kinds of titanium surfaces with novel micro/nano hierarchical structures, namely Etched (E) surface and Sandblast and etched (SE) surface, were successfully fabricated by NH4OH and H2O2 mixture. And their cellular responses of MG63 were investigated compared with Sandblast and acid-etching (SLA) surface. Scanning electron microscope (SEM), Surface profiler, X-ray photoelectron spectroscopy (XPS), and Contact angle instrument were employed to assess the surface morphologies, roughness, chemistry and wettability respectively. Hierarchical structures with micro holes of 10-30 μm in diameter and nano pits of tens of nanometers in diameter formed on both E and SE surfaces. The size of micro holes is very close to osteoblast cell, which makes them wonderful beds for osteoblast. Moreover, these two kinds of surfaces possess similar roughness and superior hydrophilicity to SLA. Reactive oxygen species were detected on E and SE surface, and thus considerable antimicrobial performance and well fixation can be speculated on them. The cell experiments also demonstrated a boost in cell attachment, and that proliferation and osteogenic differentiation were achieved on them, especially on SE surface. The results indicate that the treatment of pure titanium with H2O2/NH4OH is an effective technique to improve the initial stability of implants and enhance the osseointegration, which may be a promising surface treatment to titanium implant.
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Affiliation(s)
- Xin Yuan
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
| | - Yi Kang
- The Third Xiangya Hospital, Central South University, Changsha, PR China
| | - Jun Zuo
- Xiangya Stomatological Hospital, Central South University, Changsha, PR China
| | - Youneng Xie
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
| | - Li Ma
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
- * E-mail: (LM); (QW)
| | - Xuelei Ren
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
| | - Zeyu Bian
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
| | - Qiuping Wei
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
- * E-mail: (LM); (QW)
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
| | - Xiyang Wang
- Hunan Provincial Engineering Laboratory for High-performance Bio-engineered Biomimetic Bone Materials, Xiangya Hospital, Central South University, Changsha, PR China
| | - Zhiming Yu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, PR China
- Hunan Provincial Engineering Laboratory for High-performance Bio-engineered Biomimetic Bone Materials, Xiangya Hospital, Central South University, Changsha, PR China
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173
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Henningsen A, Smeets R, Heuberger R, Jung OT, Hanken H, Heiland M, Cacaci C, Precht C. Changes in surface characteristics of titanium and zirconia after surface treatment with ultraviolet light or non-thermal plasma. Eur J Oral Sci 2018; 126:126-134. [PMID: 29336070 DOI: 10.1111/eos.12400] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Positive effects of irradiation with ultraviolet (UV) light or treatment with non-thermal plasma on titanium and zirconia surfaces have been described in various studies. The aim of this study was to assess and compare the changes in the physicochemical surface conditions of titanium and zirconia surfaces after a short treatment with UV light or with non-thermal plasmas of argon or oxygen. Titanium and zirconia samples with moderately rough surfaces were treated for 12 min either in a UV-light oven or in a non-thermal plasma reactor that generates non-thermal plasmas of oxygen or argon. Changes in surface conditions were assessed by confocal microscopy, dynamic contact angle measurement, and X-ray photoelectron spectroscopy (XPS). No changes in roughness occurred. Ultraviolet irradiation and non-thermal plasma significantly increased the wettability of the titanium and zirconia surfaces. X-ray photoelectron spectroscopy showed an increase of oxygen and a significant decrease of carbon after treatment with either method. Thus, ultraviolet light and non-thermal plasma were found to be able to improve the chemical surface conditions of titanium and zirconia following a short exposure time. However, further in vitro and in vivo studies are needed to determine the relevance of the results.
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Affiliation(s)
- Anders Henningsen
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany.,Department of Oral and Maxillofacial Surgery, German Armed Forces Hospital, Hamburg, Germany
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | | | - Ole T Jung
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Henning Hanken
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Max Heiland
- Department of Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | | | - Clarissa Precht
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
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174
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Kanuru RK, Sugita Y, Ikeda T, Shinwari H, Ishijima M, Honda Y, Maeda H, Ogawa T. Titanium Delivery of Osteoblastic Cell Sheets: An In Vitro Study. J HARD TISSUE BIOL 2018. [DOI: 10.2485/jhtb.27.43] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rajita K. Kanuru
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
| | - Yoshihiko Sugita
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Takayuki Ikeda
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
| | - Hasnain Shinwari
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
| | - Manabu Ishijima
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
| | - Yuma Honda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Hatsuhiko Maeda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Takahiro Ogawa
- The Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry
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175
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Niobium treated by Plasma Electrolytic Oxidation with calcium and phosphorus electrolytes. J Mech Behav Biomed Mater 2018; 77:347-352. [DOI: 10.1016/j.jmbbm.2017.08.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/01/2017] [Accepted: 08/04/2017] [Indexed: 12/11/2022]
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176
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Sato N, Isomura M, Kawai R, Yoshida W, Sugita Y, Kubo K, Funato A, Ueno N, Jinno M, Maeda H. Osteogenic Potential of Rat Dental Pulp-Derived Cells on Titanium Surfaces. J HARD TISSUE BIOL 2018. [DOI: 10.2485/jhtb.27.315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Nobuaki Sato
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Madoka Isomura
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Ryoko Kawai
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Research Institute of Advanced Oral Science, Graduate School of Dentistry, Aichi Gakuin University
| | - Waka Yoshida
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Research Institute of Advanced Oral Science, Graduate School of Dentistry, Aichi Gakuin University
| | - Yoshihiko Sugita
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Research Institute of Advanced Oral Science, Graduate School of Dentistry, Aichi Gakuin University
| | - Katsutoshi Kubo
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Research Institute of Advanced Oral Science, Graduate School of Dentistry, Aichi Gakuin University
| | - Akiyoshi Funato
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Noriyuki Ueno
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Masato Jinno
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Hatsuhiko Maeda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
- Research Institute of Advanced Oral Science, Graduate School of Dentistry, Aichi Gakuin University
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177
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Tateshima S, Kaneko N, Yamada M, Duckwiler G, Vinuela F, Ogawa T. Increased affinity of endothelial cells to NiTi using ultraviolet irradiation: An in vitro study. J Biomed Mater Res A 2017; 106:1034-1038. [PMID: 29218785 DOI: 10.1002/jbm.a.36304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/06/2017] [Accepted: 12/04/2017] [Indexed: 11/12/2022]
Abstract
Nickel-titanium alloy (NiTi) is one of the most popular materials used endovascularly because of its shape memory and superelasticity. The NiTi device needs to be covered by endothelial cells after being placed in the blood vessel to reduce ischemic complications. The objective of this study was to examine the impact of ultraviolet (UV) irradiation on the biocompatibility of NiTi surfaces with endothelial cells. NiTi sheets were treated with UV irradiation for 48 h and human aorta derived endothelial cells were used in this study. UV irradiation converted the NiTi surface to hydrophilic state and increased albumin adsorption. The number of endothelial cell migration, attachment, proliferation as well as their metabolic activity were significantly increased on UV treated NiTi. This study provides the first evidence of the photoactivation of NiTi surfaces by UV irradiation and demonstrates improved biocompatibility of UV-treated NiTi surfaces with vascular endothelial cells. These results suggest that UV irradiation may promote endothelialization of NiTi devices in blood vessels. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1034-1038, 2018.
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Affiliation(s)
- Satoshi Tateshima
- Division of Interventional Neuroradiology, Ronald Reagan UCLA Medical Center, Los Angeles, California
| | - Naoki Kaneko
- Division of Interventional Neuroradiology, Ronald Reagan UCLA Medical Center, Los Angeles, California
| | - Masahiro Yamada
- Laboratory for Bone and Implant Sciences (LBIS), The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, Los Angeles, California.,Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Gary Duckwiler
- Division of Interventional Neuroradiology, Ronald Reagan UCLA Medical Center, Los Angeles, California
| | - Fernando Vinuela
- Division of Interventional Neuroradiology, Ronald Reagan UCLA Medical Center, Los Angeles, California
| | - Takahiro Ogawa
- Laboratory for Bone and Implant Sciences (LBIS), The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry, UCLA School of Dentistry, Los Angeles, California
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178
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Liu C, Zhou Y, Sun M, Li Q, Dong L, Ma L, Cheng K, Weng W, Yu M, Wang H. Light-Induced Cell Alignment and Harvest for Anisotropic Cell Sheet Technology. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36513-36524. [PMID: 28984126 DOI: 10.1021/acsami.7b07202] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Well-organized orientation of cells and anisotropic extracellular matrix (ECM) are crucial in engineering biomimetic tissues, such as muscles, arteries, and nervous system, and so on. This strategy, however, is only beginning to be explored. Here, we demonstrated a light-induced cell alignment and harvest for anisotropic cell sheets (ACS) technology using light-responsive TiO2 nanodots film (TNF) and photo-cross-linkable gelatin methacrylate (GelMA). Cell initial behaviors on TNF might be controlled by micropatterns of light-induced distinct surface hydroxyl features, owing to a sensing mechanism of myosin II-driven retraction of lamellipodia. Further light treatment allowed ACS detachment from TNF surface while simultaneously solidified the GelMA, realizing the automatic transference of ACS. Moreover, two detached ACS were successfully stacked into a 3D bilayer construct with controllable orientation of individual layer and maintained cell alignment for more than 7 days. Interestingly, the anisotropic HFF-1 cell sheets could further induce the HUVECs to form anisotropic capillary-like networks via upregulating VEGFA and ANGPT1 and producing anisotropic ECM. This developed integrated-functional ACS technology therefore provides a novel route to produce complex tissue constructs with well-defined orientations and may have a profound impact on regenerative medicine.
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Affiliation(s)
- Chao Liu
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Ying Zhou
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Miao Sun
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Qi Li
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Lingqing Dong
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Liang Ma
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Kui Cheng
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Wenjian Weng
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Mengfei Yu
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Huiming Wang
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
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Choi SH, Jeong WS, Cha JY, Lee JH, Lee KJ, Yu HS, Choi EH, Kim KM, Hwang CJ. Effect of the ultraviolet light treatment and storage methods on the biological activity of a titanium implant surface. Dent Mater 2017; 33:1426-1435. [PMID: 29033191 DOI: 10.1016/j.dental.2017.09.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE We evaluated whether the biological activity of the surface of titanium, when stored in an aqueous solution, in low vacuum, and under ambient conditions after ultraviolet light (UV) treatment is comparable to that of the surface immediately after UV treatment for 15min and that after dielectric barrier discharge (DBD) plasma treatment for 15min. METHODS Grade IV titanium discs with machined surfaces were irradiated with UV and their surface properties were evaluated immediately and after storage for 28days in distilled H2O (dH2O), a vacuum desiccator (31.325kPa), and a sealed container under air. Their surface characteristics were evaluated by atomic force microscopy, X-ray diffraction, contact angle analysis, and X-ray photoelectron spectroscopy. Biological activities were determined by analyzing the albumin adsorption, MC3T3-E1 cell adhesion, and cytoskeleton development. RESULTS Hydrophilicity of titanium surfaces stored in dH2O was comparable to that immediately after UV treatment and higher than that immediately after DBD plasma treatment (P<0.001). Storage in dH2O and in low vacuum immediately after UV treatment prevented hydrocarbon contamination and maintained elevated amounts of titanium and oxygen. After 28 days, protein adsorption, cellular adhesion, and cytoskeletal development of MC3T3-E1 cells on the titanium surfaces stored in dH2O were significantly enhanced compared to those stored in low vacuum and under ambient conditions while being comparable to those immediately after UV and DBD plasma treatments. SIGNIFICANCE UV treatment of the titanium implants followed by wet storage is useful for maintaining enhanced biological activity and overcoming biological aging during shelf storage.
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Affiliation(s)
- Sung-Hwan Choi
- Department of Orthodontics, The Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Won-Seok Jeong
- Department and Research Institute of Dental Biomaterials and Bioengineering, BK21 PLUS Project, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Jung-Yul Cha
- Department of Orthodontics, The Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Jae-Hoon Lee
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Kee-Joon Lee
- Department of Orthodontics, The Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyung-Seog Yu
- Department of Orthodontics, The Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Eun-Ha Choi
- Plasma Bioscience Research Center, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, BK21 PLUS Project, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Chung-Ju Hwang
- Department of Orthodontics, The Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea.
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Pereira BL, Lepienski CM, Mazzaro I, Kuromoto NK. Apatite grown in niobium by two-step plasma electrolytic oxidation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:1235-1241. [DOI: 10.1016/j.msec.2016.10.073] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/06/2016] [Accepted: 10/16/2016] [Indexed: 12/25/2022]
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Yasuda K, Okazaki Y, Abe Y, Tsuga K. Effective UV/Ozone irradiation method for decontamination of hydroxyapatite surfaces. Heliyon 2017; 3:e00372. [PMID: 28795167 PMCID: PMC5542418 DOI: 10.1016/j.heliyon.2017.e00372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/06/2017] [Accepted: 07/26/2017] [Indexed: 12/04/2022] Open
Abstract
The purpose of this study was to establish whether UV/ozone (O3) irradiation method can effectively decontaminate hydroxyapatite surfaces, including those modified by the treatment with 30% phosphoric acid solution through morphological and chemical surface analyses (surface roughness, X-ray photoelectron spectroscopy and wettability), and to evaluate the in vitro response of osteoblast-like MC3T3-E1 cells to the modified hydroxyapatite surface decontaminated via this method. The amount of carbon and the contact angle of hydroxyapatite surfaces were significantly decreased by UV/O3 irradiation that lasted for ≥ 5 and ≥ 3 min, respectively (P < 0.01). Additionally, 7-day storage of H3PO4-modified hydroxyapatite surface decontaminated with 5-min irradiation did not affect contact angle values (P > 0.05). MC3T3-E1 cell proliferation, differentiation (as assessed by relative ALP and OCN mRNA levels), and mineralisation were significantly promoted on irradiated surfaces (P < 0.05). These findings show that UV/O3 irradiation for ≥ 5 min significantly decontaminated H3PO4-modified hydroxyapatite surface, improved its wettability, and facilitated osteoblast growth and function.
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Affiliation(s)
- Keisuke Yasuda
- Department of Advanced Prosthodontics, Division of Dental Sciences, Biomedical Sciences Major, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Yohei Okazaki
- Department of Advanced Prosthodontics, Division of Dental Sciences, Biomedical Sciences Major, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Yasuhiko Abe
- Department of Advanced Prosthodontics, Division of Dental Sciences, Biomedical Sciences Major, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Division of Dental Sciences, Biomedical Sciences Major, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Improvement of Cr-Co-Mo Membrane Surface Used as Barrier for Bone Regeneration through UV Photofunctionalization: An In Vitro Study. MATERIALS 2017; 10:ma10070825. [PMID: 28773195 PMCID: PMC5551868 DOI: 10.3390/ma10070825] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 07/05/2017] [Accepted: 07/11/2017] [Indexed: 12/14/2022]
Abstract
Although there are several studies of the ultraviolet (UV) light-mediated photofunctionalization of titanium for use as implant material, the underlying mechanism is not fully understood. However, the results of in vitro and in vivo studies are very encouraging. The use of UV photofunctionalization as a surface treatment on other implant materials, as the Cr-Co-Mo alloy, has not been explored in depth. Using sandblasted Cr-Co-Mo discs, the surface photofunctionalization was studied for ultraviolet A (UVA, 365 nm) and ultraviolet C (UVC, 254 nm), and the surfaces were evaluated for their ability to sustain hydroxyapatite crystal growth through incubation in simulated body fluid for a seven-day period. The variation of the pre- and post-irradiation contact angle and surface composition was determined through the quantification of the weight percentage of Ca and P crystals by the EDAX ZAF method (EDS). Statistically significant differences (p < 0.05) were found for samples irradiated with UVA over 48 h, corresponding with hydrophilic surfaces, and the same result was found for samples exposed to 3 h of UVC. Superhydrophilic surfaces were found in samples irradiated for 12, 24 and 48 h with UVC. The decrease in the carbon content is related with the increase in the surface content of Ca and P, and vice versa over the Cr-Co-Mo surfaces.
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183
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Henningsen A, Smeets R, Hartjen P, Heinrich O, Heuberger R, Heiland M, Precht C, Cacaci C. Photofunctionalization and non-thermal plasma activation of titanium surfaces. Clin Oral Investig 2017; 22:1045-1054. [PMID: 28730456 DOI: 10.1007/s00784-017-2186-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVE The aim of this study was to compare UV light and non-thermal plasma (NTP) treatment regarding the improvement of physical material characteristics and cell reaction on titanium surfaces in vitro after short-term functionalization. MATERIALS AND METHODS Moderately rough (Ra 1.8-2.0 μm) sandblasted and acid-etched titanium disks were treated by UV light (0.05 mW/cm2 at λ = 360 nm and 2 mW/cm2 at λ = 250 nm) or by NTP (24 W, -0.5 mbar) of argon or oxygen for 12 min each. Surface structure was investigated by scanning electron microscopy, confocal microscopy and X-ray photoelectron spectroscopy (XPS). Hydrophilicity was assessed by dynamic contact angle measurement. Cell attachment, viability, cell proliferation and cytotoxicity were assessed in vitro using murine osteoblast-like cells. RESULTS UV irradiation or NTP treatment of titanium surfaces did not alter the surface structure. XPS analysis revealed a significantly increased oxidation of the surface and a decrease of carbon after the use of either method. NTP and UV light led to a significant better cell attachment of murine osteoblasts; significantly more osteoblasts grew on the treated surfaces at each time point (p < 0.001). CONCLUSIONS UV light as well as NTP modified the surface of titanium and significantly improved the conditions for murine osteoblast cells in vitro. However, results indicate a slight advantage for NTP of argon and oxygen in a short time interval of surface functionalization compared to UV. CLINICAL RELEVANCE UV light and NTP are able to improve surface conditions of dental implants made of titanium.
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Affiliation(s)
- Anders Henningsen
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany.
- Department of Oral and Maxillofacial Surgery, German Armed Forces Hospital, Lesserstrasse 180, 22049, Hamburg, Germany.
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Philip Hartjen
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Oliver Heinrich
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Roman Heuberger
- RMS Foundation, Bischmattstraße 12, 2544, Bettlach, Switzerland
| | - Max Heiland
- Department of Oral and Maxillofacial Surgery, Charité University Hospital, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Clarissa Precht
- Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Claudio Cacaci
- Implant Competence Centrum, Weinstr. 4, 80333, Munich, Germany
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Hydrothermal Sterilization Improves Initial Osteoblast Responses on Sandpaper-Polished Titanium. MATERIALS 2017; 10:ma10070812. [PMID: 28773174 PMCID: PMC5551855 DOI: 10.3390/ma10070812] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/09/2017] [Accepted: 07/14/2017] [Indexed: 11/17/2022]
Abstract
Hydrocarbon contamination accumulated on titanium (Ti) implant surfaces during storage and sterilization is unavoidable and difficult to remove. It impairs the bioactivity of implants, restricts initial interactions between implants and the surrounding biological environment, and has become a common challenge for Ti implants. To overcome this problem, sterilization was considered as the final surface modification and a novel method, hydrothermal sterilization (HS), was proposed. Briefly, stored sandpaper-polished Ti specimens were sterilized in a glass container with pure water at 121 °C for 20 min and kept in the same water until utilization. As a control, another group of specimens was sterilized with conventional autoclaving (AC) at 121 °C for 20 min and stored in sterilization pouches after being dried at 60 °C. Compared with AC, HS deposited numerous nano-sized particles on the substrates, reduced the atomic percentage of the surface carbon, and transformed the Ti surface to a super hydrophilic status. HS also increased the attachment rate, spread, proliferation, and the mineralized nodule areas of rat bone marrow-derived osteoblasts. These results suggest that HS enhances the bioactivity of Ti implants for osteoblasts, and that this biofunctionalization was attributed to nanostructure construction, hydrophilic conversion, and the effective removal of hydrocarbons. Hydrothermal sterilization is proposed to be used as a universal sterilization method for all kinds of titanium implants without apatite coating.
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Abstract
OBJECTIVES This study evaluated the effect of photofunctionalization on osseointegration under the biologically adverse conditions of aging. MATERIALS First of all, bone marrow-derived osteoblastic cells from young (8 weeks old) and aged (15 months old) rats were biologically characterized. Then, the osteoblasts from aged rats were seeded on titanium discs with and without photofunctionalization, and assessed for initial cell attachment and osteoblastic functions. Titanium mini-implants, with and without photofunctionalization, were placed in the femur of aged rats, and the strength of osseointegration was measured at week 2 of healing. Periimplant tissue was examined morphologically and chemically using scanning electron microscopy and energy dispersive x-ray spectroscopy, respectively. RESULTS Cells from the aged rats showed substantially reduced biological capabilities compared with those derived from young rats. The cells from aged rats showed significantly increased cell attachment and the expression of osteoblastic function on photofunctionalized titanium than on untreated titanium. In addition, the strength of osseointegration was increased by 40% in aged rats carrying the photofunctionalized implants. Robust bone formation was observed around the photofunctionalized implants with strong elemental peaks of calcium and phosphorus, whereas the tissue around untreated implants showed weaker calcium and phosphate signals than titanium ones. CONCLUSION These in vivo and in vitro results corroboratively demonstrate that photofunctionalization is effective for enhancing osseointegration in aged rats.
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Liao Y, Li L, Chen J, Yang P, Zhao A, Sun H, Huang N. Tailoring of TiO2 films by H2SO4 treatment and UV irradiation to improve anticoagulant ability and endothelial cell compatibility. Colloids Surf B Biointerfaces 2017; 155:314-322. [DOI: 10.1016/j.colsurfb.2017.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/05/2017] [Accepted: 04/10/2017] [Indexed: 10/19/2022]
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187
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Zhang H, Komasa S, Mashimo C, Sekino T, Okazaki J. Effect of ultraviolet treatment on bacterial attachment and osteogenic activity to alkali-treated titanium with nanonetwork structures. Int J Nanomedicine 2017; 12:4633-4646. [PMID: 28721040 PMCID: PMC5500560 DOI: 10.2147/ijn.s136273] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Purpose Alkali-treated titanium with nanonetwork structures (TNS) possesses good osteogenic activity; however, the resistance of this material to bacterial contamination remains inadequate. As such, TNS implants are prone to postoperative infection. In this work, we attempted to alter the biological properties of TNS by treatment with short-duration high-intensity ultraviolet (UV) irradiation. Methods TNS discs were treated with UV light (wavelength =254 nm, strength =100 mW/cm2) for 15 minutes using a UV-irradiation machine. We carried out a surface characterization and evaluated the discs for bacterial film formation, protein adsorption, and osteogenic features. Results The superhydrophilicity and surface hydrocarbon elimination exhibited by the treated material (UV-treated titanium with a nanonetwork structure [UV-TNS]) revealed that this treatment effectively changed the surface characteristics of TNS. Notably, UV-TNS also showed reduced colonization by Actinomyces oris during an initial attachment period and inhibition of biofilm formation for up to 6 hours. Moreover, compared to conventional TNS, UV-TNS showed superior osteogenic activity as indicated by increased levels of adhesion, proliferation, alkaline phosphatase activity, osteogenic factor production, and osteogenesis-related gene expression by rat bone marrow mesenchymal stem cells (rBMMSCs). This inverse relationship between bacterial attachment and cell adhesion could be due to the presence of electron–hole pairs induced by high-intensity UV treatment. Conclusion We suggest that simple UV treatment has great clinical potential for TNS implants, as it promotes the osseointegration of the TNS while reducing bacterial contamination, and can be conducted chair-side immediately prior to implantation.
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Affiliation(s)
- Honghao Zhang
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan.,Department of Stomatology, Nanfang Hospital and College of Stomatology, Southern Medical University, Guangzhou, Guangdong, China
| | - Satoshi Komasa
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
| | - Chiho Mashimo
- Department of Bacteriology, Osaka Dental University, Hirakata
| | - Tohru Sekino
- The Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka, Japan
| | - Joji Okazaki
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, Hirakata, Osaka, Japan
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Abstract
We evaluated whether the biological activity of the surface of titanium, when stored in an aqueous solution after ultraviolet (UV) treatment, is comparable to that of the surface immediately after UV treatment. We subjected Grade IV titanium discs with machined surfaces to UV radiation for 15 min and then tested them immediately and after storage for 28 days, with and without distilled H2O (dH2O). We evaluated the surface characteristics using surface profiling, contact angle analysis, X-ray photoelectron spectroscopy, and in terms of the surface zeta-potential. We determined the level of biological activity by analysing albumin adsorption, MC3T3-E1 and human mesenchymal cell adhesion and cytoskeleton development, as well as the production of intracellular reactive oxygen species between groups. The surface characteristics produced by the UV irradiation were maintained in dH2O for 28 days. We found that titanium stored in dH2O for 28 days after UV treatment exhibited enhanced protein adsorption, cell attachment, and cytoskeleton development. Titanium stored in dH2O for 28 days after UV irradiation exhibited a lower level of oxidative stress, comparable to that of the titanium immediately after UV treatment. UV treatment combined with wet storage can be used as a means of overcoming the biological aging of titanium.
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189
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Yu M, Gong J, Zhou Y, Dong L, Lin Y, Ma L, Weng W, Cheng K, Wang H. Surface hydroxyl groups regulate the osteogenic differentiation of mesenchymal stem cells on titanium and tantalum metals. J Mater Chem B 2017; 5:3955-3963. [PMID: 32264256 DOI: 10.1039/c7tb00111h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Titanium (Ti) and tantalum (Ta) metals have been widely used as implants for their favorable mechanical features and good biocompatibility. However, the results on their osteogenic capacity have been conflicting due to the synergistic effects of complex and multiple material surface features (such as topography, surface chemistries etc.) on cellular behaviors. Here, we directly compare the osteogenic response of mesenchymal stem cells (MSCs) to Ti and Ta metal surfaces with alterable surface hydroxyl groups. Although no difference was found on both surface topographies, cellular adhesion, proliferation, and the expression of osteogenic-related markers were upregulated with the increasing amount of surface hydroxyl groups (-OH) after ultraviolet (UV) light treatment. Moreover, Ti showed better effects in promoting osteogenic differentiation of MSCs than Ta before UV light treatment, but demonstrated the opposite after UV light treatment. These results might be attributed to the comparative quantity of the distinct type of surface hydroxyl groups (bridging-OH and terminal-OH), which regulated the conformation of the initial protein adsorption and subsequent cellular behaviors. Our results demonstrate the central role of the surface hydroxyl groups in mediating cell-material interactions and implicate this interface as helping in optimizing osteointegration of Ti and Ta based orthopaedic and dental implants.
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Affiliation(s)
- Mengfei Yu
- The Affiliated Stomatologic Hospital, Zhejiang University, Hangzhou 310003, China.
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Yamauchi R, Itabashi T, Wada K, Tanaka T, Kumagai G, Ishibashi Y. Photofunctionalised Ti6Al4V implants enhance early phase osseointegration. Bone Joint Res 2017; 6:331-336. [PMID: 28522447 PMCID: PMC5457646 DOI: 10.1302/2046-3758.65.bjr-2016-0221.r1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 01/31/2017] [Indexed: 11/29/2022] Open
Abstract
Objectives Ultraviolet (UV) light-mediated photofunctionalisation is known to improve osseointegration of pure titanium (Ti). However, histological examination of titanium alloy (Ti6Al4V), which is frequently applied in orthopaedic and dental surgery, has not yet been performed. This study examined the osseointegration of photofunctionalised Ti6Al4V implants. Methods Ti and Ti6Al4V implants were treated with UV light, and the chemical composition and contact angle on the surfaces were evaluated to confirm photofunctionalisation. The implants were inserted into femurs in rats, and the rats were killed two or four weeks after the surgery. For histomorphometric analysis, both the bone–implant contact (BIC) ratio and the bone volume (BV) ratio were calculated from histological analysis and microcomputed tomography data. Results The amount of carbon and the contact angle on both implants were significantly reduced after UV irradiation. The BIC ratios for both UV light-treated implants significantly increased at two weeks, but there was no significant difference at four weeks. There was no significant difference in the BV ratios between the UV light-treated and control implants at two or four weeks. Conclusions This study suggests that photofunctionalisation of Ti6Al4V implants, similar to that of Ti implants, may promotes osseointegration in early but not in the late phase of osseointegration. Cite this article: R. Yamauchi, T. Itabashi, K. Wada, T. Tanaka, G. Kumagai, Y. Ishibashi. Photofunctionalised Ti6Al4V implants enhance early phase osseointegration. Bone Joint Res 2017;6:331–336. DOI: 10.1302/2046-3758.65.BJR-2016-0221.R1.
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Affiliation(s)
- R Yamauchi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562 Aomori, Japan
| | - T Itabashi
- Department of Surgery, Kuroishi General Hospital, 1 Chome-70 Kitamicho, Kuroishi, Aomori Prefecture 036-0541, Japan
| | - K Wada
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562 Aomori, Japan
| | - T Tanaka
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562 Aomori, Japan
| | - G Kumagai
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562 Aomori, Japan
| | - Y Ishibashi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562 Aomori, Japan
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Lee JS, Kim K, Park JP, Cho SW, Lee H. Role of Pyridoxal 5'-Phosphate at the Titanium Implant Interface In Vivo: Increased Hemophilicity, Inactive Platelet Adhesion, and Osteointegration. Adv Healthc Mater 2017; 6. [PMID: 28081293 DOI: 10.1002/adhm.201600962] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 10/16/2016] [Indexed: 11/08/2022]
Abstract
Titanium is the most biocompatible inorganic biomaterial with a long history of use in orthopedic and dental implants. However, promoting rapid and effective bone formation and integration onto etched, rough TiO2 surfaces has been a challenging topic. Here, 21 commercially available molecules are examined that met the following criteria: (1) contain phosphonic acid for stable immobilization onto TiO2 surfaces and (2) have a molecular weight less than 500 Da for negligible coating thickness. Of these molecules, the surface immobilization of pyridoxal 5'-phosphate (PLP), an active form of vitamin B6 , dramatically increases the hemophilic property of the surface and accelerated osteointegration in vivo. Analysis shows that PLP promotes surface binding of serum albumin and other plasma proteins by Schiff-base formations via its aldehyde group, providing a platform suitable for osteoblast adhesion. PLP also retards blood coagulation more than the widely used citric acid at the TiO2 surface. As PLP is capable of maintaining an inactivated status of surface-adsorbed platelets, delayed coagulation at the implant-blood interface allows for sufficient supply of growth factors from blood plasma and migration of osteoblasts. The results suggest that PLP can be widely applicable as a biocompatible, effective coating compound to promote osteointegration of titanium-based implants.
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Affiliation(s)
- Jung Seung Lee
- Department of Biotechnology; Yonsei University; 50 Yonsei-ro Seodaemun-gu Seoul 120-749 Republic of Korea
| | - Kyuri Kim
- The Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 Republic of Korea
| | - Joseph P. Park
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 Republic of Korea
| | - Seung-Woo Cho
- Department of Biotechnology; Yonsei University; 50 Yonsei-ro Seodaemun-gu Seoul 120-749 Republic of Korea
| | - Haeshin Lee
- The Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 Republic of Korea
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 291 University Rd Daejeon 305-701 Republic of Korea
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Soltanzadeh P, Ghassemi A, Ishijima M, Tanaka M, Park W, Iwasaki C, Hirota M, Ogawa T. Success rate and strength of osseointegration of immediately loaded UV-photofunctionalized implants in a rat model. J Prosthet Dent 2017; 118:357-362. [PMID: 28222880 DOI: 10.1016/j.prosdent.2016.11.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 11/03/2016] [Accepted: 11/03/2016] [Indexed: 11/16/2022]
Abstract
STATEMENT OF PROBLEM Despite its clinical benefits, the immediate loading protocol might have a higher risk of implant failure than the regular protocol. Ultraviolet (UV) photofunctionalization is a novel surface enhancement technique for dental implants. However, the effect of photofunctionalization under loading conditions is unclear. PURPOSE The purpose of this animal study was to evaluate the effect of photofunctionalization on the biomechanical quality and strength of osseointegration under loaded conditions in a rat model. MATERIAL AND METHODS Untreated and photofunctionalized, acid-etched titanium implants were placed into rat femurs. The implants were immediately loaded with 0.46 N of constant lateral force. The implant positions were evaluated after 2 weeks of healing. The strength of osseointegration was evaluated by measuring the bone-implant interfacial breakdown point during biomechanical push-in testing. RESULTS Photofunctionalization induced hydrophilic surfaces on the implants. Osseointegration was successful in 28.6% of untreated implants and 100% of photofunctionalized implants. The strength of osseointegration in successful implants was 2.4 times higher in photofunctionalized implants than in untreated implants. The degree of tilt of untreated implants toward the origin of force was twice that of photofunctionalized implants. CONCLUSIONS Within the limit of an animal model, photofunctionalization significantly increased the success of osseointegration and prevented implant tilt. Even for the implants that underwent successful osseointegration, the strength of osseointegration was significantly higher for photofunctionalized implants than for untreated implants. Further experiments are warranted to determine the effectiveness of photofunctionalization on immediately loaded dental implants.
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Affiliation(s)
- Pooya Soltanzadeh
- Research Assistant, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif; and Resident, Advanced Specialty Education Program in Prosthodontics, Loma Linda University, School of Dentistry, Loma Linda, Calif
| | - Amirreza Ghassemi
- Research Assistant, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif; and Resident, Periodontics Department, Saint Louis University, Center for Advanced Dental Education, St Louis, Mo
| | - Manabu Ishijima
- Visiting Assistant Project Scientist, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif.
| | - Miyuki Tanaka
- Visiting scholar, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif
| | - Wonhee Park
- Visiting scholar, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif
| | - Chika Iwasaki
- Visiting scholar, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif
| | - Makoto Hirota
- Visiting scholar, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, Calif
| | - Takahiro Ogawa
- Professor, Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, Calif
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Ikawa H, Moroi A, Yoshizawa K, Saida Y, Hotta A, Tsutsui T, Fukaya K, Hiraide R, Takayama A, Tsunoda T, Saito Y, Ueki K. Bone regeneration enhancement by ultra-violet (UV) treatment for uHA/PLLA absorbable mesh. J Craniomaxillofac Surg 2017; 45:634-641. [PMID: 28325653 DOI: 10.1016/j.jcms.2017.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 12/01/2016] [Accepted: 02/01/2017] [Indexed: 10/20/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the effect of bone regeneration enhancement by ultra-violet (UV) treatment of an unsintered hydroxyapatite (u-HA)/poly-l-lactic acid (PLLA) mesh in rabbitnasal bone. MATERIALS AND METHODS Thirty adult male Japanese white rabbits (12-16 weeks, 2.5-3.0 kg) were used in this study. After incising along the nasal bone, 6 × 6 × depth 1 mm two bone defects were made on both sides. In the UV group (n = 30), the defects were covered with uHA/PLLA mesh, treated by UV (wavelength 172 nm, tube wall illumination 13 mW/cm2, period 8 min, intensity 6.26 J/cm2) and screwed. In the control group (n = 30), untreated uHA/PLLA was applied in a similar manner. The rabbits were sacrificed at 1, 2, 3, 4 and 6 weeks postoperatively, and formalin-fixed specimens were frozen. The specimens were stained with haematoxylin and eosin. For immunohistochemical analysis, the specimens were treated with anti-alkaline phosphatase (ALP). Finally, bone ratio and ALP expression were evaluated microscopically. RESULTS The UV group had a significantly higher number of ALP stained cells than the control group after 1, 2, and 3 weeks (P < 0.05). The bone ratio was also significantly higher in the UV group than in the control group after 1, 2, 3, and 4 weeks (P < 0.05). CONCLUSION This study suggests that bone regeneration can be enhanced by UV treatment using an uHA/PLLA mesh.
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Affiliation(s)
- Hiroumi Ikawa
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Akinori Moroi
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan.
| | - Kunio Yoshizawa
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Yuriko Saida
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Asami Hotta
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Takamitsu Tsutsui
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Kenichi Fukaya
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Ryota Hiraide
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Akihiro Takayama
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Tatsuya Tsunoda
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Yuki Saito
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
| | - Koichiro Ueki
- Department of Oral & Maxillofacial Surgery (Chief Professor: Koichiro Ueki), Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi, Japan
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Itabashi T, Narita K, Ono A, Wada K, Tanaka T, Kumagai G, Yamauchi R, Nakane A, Ishibashi Y. Bactericidal and antimicrobial effects of pure titanium and titanium alloy treated with short-term, low-energy UV irradiation. Bone Joint Res 2017; 6:108-112. [PMID: 28246094 PMCID: PMC5331176 DOI: 10.1302/2046-3758.62.2000619] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 01/17/2017] [Indexed: 11/25/2022] Open
Abstract
Objectives The surface of pure titanium (Ti) shows decreased histocompatibility over time; this phenomenon is known as biological ageing. UV irradiation enables the reversal of biological ageing through photofunctionalisation, a physicochemical alteration of the titanium surface. Ti implants are sterilised by UV irradiation in dental surgery. However, orthopaedic biomaterials are usually composed of the alloy Ti6Al4V, for which the antibacterial effects of UV irradiation are unconfirmed. Here we evaluated the bactericidal and antimicrobial effects of treating Ti and Ti6Al4V with UV irradiation of a lower and briefer dose than previously reported, for applications in implant surgery. Materials and Methods Ti and Ti6Al4V disks were prepared. To evaluate the bactericidal effect of UV irradiation, Staphylococcus aureus 834 suspension was seeded onto the disks, which were then exposed to UV light for 15 minutes at a dose of 9 J/cm2. To evaluate the antimicrobial activity of UV irradiation, bacterial suspensions were seeded onto the disks 0, 0.5, one, six, 24 and 48 hours, and three and seven days after UV irradiation as described above. In both experiments, the bacteria were then harvested, cultured, and the number of colonies were counted. Results No colonies were observed when UV irradiation was performed after the bacteria were added to the disks. When the bacteria were seeded after UV irradiation, the amount of surviving bacteria on the Ti and Ti6Al4V disks decreased at 0 hours and then gradually increased. However, the antimicrobial activity was maintained for seven days after UV irradiation. Conclusion Antimicrobial activity was induced for seven days after UV irradiation on both types of disk. Irradiated Ti6Al4V and Ti had similar antimicrobial properties. Cite this article: T. Itabashi, K. Narita, A. Ono, K. Wada, T. Tanaka, G. Kumagai, R. Yamauchi, A. Nakane, Y. Ishibashi. Bactericidal and antimicrobial effects of pure titanium and titanium alloy treated with short-term, low-energy UV irradiation. Bone Joint Res 2017;6:108–112. DOI: 10.1302/2046-3758.62.2000619.
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Affiliation(s)
- T Itabashi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - K Narita
- Department of Microbiology and Immunology, Hirosaki University Graduate School of Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - A Ono
- Department of Orthopaedic Surgery, Hirosaki Memorial Hospital, 59-1, Sakaizeki, Nishida, Hirosaki, Aomori, 036-8076, Japan
| | - K Wada
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - T Tanaka
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - G Kumagai
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - R Yamauchi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - A Nakane
- Department of Microbiology and Immunology, Hirosaki University Graduate School of Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
| | - Y Ishibashi
- Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori, 036-8562, Japan
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195
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Lee JH, Jeong WS, Seo SJ, Kim HW, Kim KN, Choi EH, Kim KM. Non-thermal atmospheric pressure plasma functionalized dental implant for enhancement of bacterial resistance and osseointegration. Dent Mater 2017; 33:257-270. [PMID: 28088458 DOI: 10.1016/j.dental.2016.11.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 10/06/2016] [Accepted: 11/29/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Even though roughened titanium (Ti) and Ti alloys have been clinically used as dental implant, they encourage bacterial adhesion, leading to failure of the initial stability. Here, the non-thermal atmospheric pressure plasma jet (NTAPPJ) functionalized Ti and Ti alloy were investigated to promote cellular activities but inhibit the initial attachment of the adherent pioneer bacterium, Streptococcus sanguinis, without topographical changes. METHODS After the produced radicals from NTAPPJ were characterized, bacterial adhesion to specimens was assessed by PrestoBlue assay and live-dead staining with or without the NTAPPJ functionalizing. After the surface was characterized using optical profilometry, X-ray photoelectron spectroscopy and contact angle analysis, the ions released from the specimens were investigated. In vitro initial cell attachment (4h or 24h) with adhesion images and alkaline phosphatase activity (ALP, 14 days) measurements were performed using rat bone marrow-derived mesenchymal stem cells. RESULTS The initial bacterial adhesion to the Ti and Ti alloy was significantly inhibited after NTAPPJ functionalizing (p<0.05) compared to those without NTAPPJ functionalizing. The bacterial adhesion-resistance effect was induced by carbon cleaning, which was dependent on the working gas used on the Ti specimens (nitrogen>ammonia and air, p<0.05). The initial cell adhesion with well-developed vinculin localization and consequent ALP activity at 14days to the NTAPPJ-functionalized specimens were superior to the non-treated specimens. SIGNIFICANCE For the promising success of dental implants, NTAPPJ functionalizing is suggested as a novel surface modification technique; this technique can help ensure the success of integration between the dental implants and bone tissues with less concern of inflammation.
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Affiliation(s)
- Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea; The Department of Oral Biology, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Won-Seok Jeong
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Seog-Jin Seo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 31116, Republic of Korea
| | - Kyoung-Nam Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Eun-Ha Choi
- Plasma Bioscience Research Center, Kwangwoon University, Kwangwoon-ro 20, Seoul 01897, Republic of Korea
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea.
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196
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Yadav A, Yadav R, Gupta A, Baranwal A, Bhatnagar A, Singh V. Effect of Ultraviolet Irradiation on the Osseointegration of a Titanium Alloy with Bone. Contemp Clin Dent 2017; 8:571-578. [PMID: 29326508 PMCID: PMC5754978 DOI: 10.4103/ccd.ccd_576_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Introduction: Attempt has been made to analyze the potential of titanium (Ti) alloy for osteointegration by the effect of surface photo functionalization in different aspects as follows: in Ringer's solution, in vitro cell growth, and in vivo study on rabbit. The present study was aimed to investigate the influence of ultraviolet (UV) light on surface topography, corrosion behavior, and bioactivity of indigenously manufactured samples of Ti alloy mini-implant. Materials and Methods: The study includes surface modification of Ti samples by UV treatment, corrosion testing of the specimens using Potentiostat (GAMRY System), qualitative examination of modified surface topography using scanning electron microscope, and cellular viability test on Ti alloy surface (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide ASSAY). To find the effect of UV light on implant bone integration, biochemical test was performed on the femur of rabbits. Results and Discussion: Corrosion resistance of untreated Ti alloy in Ringer's solution was found to be less, whereas corrosion rate was more. Corrosion resistance of UV-treated samples was found to increase significantly, thereby lowering the corrosion rate. Cell growth in UV-treated specimen was observed to be higher than that in untreated samples. It is important to mention that cell growth was significantly enhanced on samples which were UV treated for longer duration of time. Conclusions: There was a marked improvement in cell growth on UV-treated Ti alloy samples. Hence, it is expected that it would enhance the process of osseointegration of Ti with bone. Another important finding obtained was that the removal torque values of UV-treated implants were higher than that of untreated implants. The overall result reveals that UV treatment of implants does help us in speeding up the osseointegration process.
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Affiliation(s)
- Ashish Yadav
- Department of Dental Surgery, Government Medical College, Azamgarh, India
| | - Ranjana Yadav
- Department of Public Health Dentistry, Babu Banarasi Das College of Dental Sciences, Lucknow, India
| | - Aratee Gupta
- Department of Prosthodontics, Crown and Bridge, Implantology, Faculty of Dental Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Akash Baranwal
- Department of Conservative & Endodontics, Faculty of Dental Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Atul Bhatnagar
- Department of Prosthodontics, Crown and Bridge, Implantology, Faculty of Dental Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Vakil Singh
- Department of Metallurgical Engineering IIT, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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197
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Ohyama T, Yasuda H, Shibuya N, Tadokoro S, Nakabayashi S, Namaki S, Hara Y, Ogawa T, Ishigami T. Three-dimensional finite element analysis of the effects of implant diameter and photofunctionalization on peri-implant stress. J Oral Sci 2017. [DOI: 10.2334/josnusd.16-0144] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Tetsuo Ohyama
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Hiroyasu Yasuda
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Norio Shibuya
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Satomi Tadokoro
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Shinya Nakabayashi
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Shunsuke Namaki
- Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry
| | - Yaeko Hara
- Department of Oral and Maxillofacial Surgery, Nihon University School of Dentistry
| | - Takahiro Ogawa
- Laboratory for Bone and Implant Sciences, Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, Biomaterials, and Hospital Dentistry, UCLA School of Dentistry
| | - Tomohiko Ishigami
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
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Yokoi Y, Uozumi T, Matsuda S, Imanishi T, Toriya J, Shoumura M, Okafuji N, Osuga N. Proliferation and Alkaline Phosphatase Activity of Osteoblast-like Cells on the Sintered Rutile Titanium Dioxide. J HARD TISSUE BIOL 2017. [DOI: 10.2485/jhtb.26.37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yukiko Yokoi
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
- Department of Oral Health Promotion, Matsumoto Dental University Graduate School of Oral Medicine
| | - Tomoko Uozumi
- Department of Hard Tissue Research, Matsumoto Dental University Graduate School of Oral Medicine
| | - Saeka Matsuda
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
- Department of Hard Tissue Research, Matsumoto Dental University Graduate School of Oral Medicine
| | - Tohru Imanishi
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
| | - Jin Toriya
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
| | - Masahito Shoumura
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
- Department of Oral Health Promotion, Matsumoto Dental University Graduate School of Oral Medicine
| | - Norimasa Okafuji
- Department of Hard Tissue Research, Matsumoto Dental University Graduate School of Oral Medicine
| | - Naoto Osuga
- Department of Pediatric Dentistry, Matsumoto Dental University School of Dentistry
- Department of Oral Health Promotion, Matsumoto Dental University Graduate School of Oral Medicine
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Abstract
PURPOSE The aim of this study was to investigate the earlier phase of the osseointegration of a laser-treated implant surface in terms of human protein adsorption. MATERIALS AND METHODS Titanium surfaces were divided into machined (M), sandblasted (SB), and laser-treated (LT). The LT surfaces were created with an Nd diode-pumped laser in Q-switching, whereas the SB were treated with Al2O3. An x-ray photoelectron spectroscopy (XPS) analysis of titanium surface was performed. Titanium discs were used for albumin and fibronectin adsorption evaluation through fluorescence intensity. Fibronectin evaluation was also made with Western Blot analysis on experimental implants. RESULTS LT discs appeared to trigger a higher albumin and fibronectin adsorption with a regular pattern. The mean count of albumin adsorption was 0.29 and 3.8 for SB and LT, respectively (P = 0.016), whereas fibronectin values were 0.67 and 4.9 for (SB) and (LT) titanium (P = 0.02). XPS analysis showed that titanium, oxygen, carbon, and nitrogen were found on all 3 surfaces. CONCLUSION Laser-engineered porous titanium surface seems to promote, in vitro, the adsorption of albumin and fibronectin more than sandblasted (SB) or machined (M) implants.
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UV Photofunctionalization Effect on Bone Graft in Critical One-Wall Defect around Implant: A Pilot Study in Beagle Dogs. BIOMED RESEARCH INTERNATIONAL 2016; 2016:4385279. [PMID: 28116296 PMCID: PMC5225323 DOI: 10.1155/2016/4385279] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/03/2016] [Accepted: 12/01/2016] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to compare and evaluate, through histomorphometric and radiological analysis, the effects of UV photofunctionalization on an implant placed over a critical defect area with and without a bone graft. Four female beagle dogs were first divided into control and bone graft groups. Each group was then subdivided into UV-treated and UV-untreated groups. The mandibular premolars in each dog were extracted. 12 weeks after extraction, implants were placed according to the condition of each group. Four and 12 weeks after implantation on left and right mandible, the dogs were sacrificed. The specimens were prepared for histomorphometric and micro-computed tomographic analysis. In both 4-week and 12-week groups, UV-treated implant surfaces showed better osseointegration than SA implant surfaces. Also, with implant surfaces placed over the critical defect with bone graft, UV photofunctionalization increased bone-to-implant contact (BIC) and new bone formation at the initial stage (4 weeks). Based on the results of this study, it can be suggested that UV photofunctionalization on the surface of implants placed over large critical defects with bone graft aids initial osseointegration and osteogenesis.
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