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D'Agostino A, Tana F, Ettorre A, Pavarini M, Serafini A, Cochis A, Scalia AC, Rimondini L, De Giglio E, Cometa S, Chiesa R, De Nardo L. Mesoporous zirconia surfaces with anti-biofilm properties for dental implants. Biomed Mater 2021; 16. [PMID: 33857927 DOI: 10.1088/1748-605x/abf88d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/15/2021] [Indexed: 01/30/2023]
Abstract
Cytocompatible bioactive surface treatments conferring antibacterial properties to osseointegrated dental implants are highly requested to prevent bacteria-related peri-implantitis. Here we focus on a newly designed family of mesoporous coatings based on zirconia (ZrO2) microstructure doped with gallium (Ga), exploiting its antibacterial and pro-osseo-integrative properties. The ZrO2films were obtained via sol-gel synthesis route using Pluronic F127 as templating agent, while Ga doping was gained by introducing gallium nitrate hydrate. Chemical characterization by means of x-ray photoelectron spectroscopy and glow discharge optical emission spectroscopy confirmed the effective incorporation of Ga. Then, coatings morphological and structural analysis were carried out by transmission electron microscopy and selected area electron diffraction unveiling an effective stabilization of both the mesoporous structure and the tetragonal ZrO2phase. Specimens' cytocompatibility was confirmed towards gingival fibroblast and osteoblasts progenitors cultivated directly onto the coatings showing comparable metabolic activity and morphology in respect to controls cultivated on polystyrene. The presence of Ga significantly reduced the metabolic activity of the adhered oral pathogensPorphyromonas gingivalisandAggregatibacter actinomycetemcomitansin comparison to untreated bulk zirconia (p< 0.05); on the opposite, Ga ions did not significantly reduce the metabolism of the oral commensalStreptococcus salivarius(p> 0.05) thus suggesting for a selective anti-pathogens activity. Finally, the coatings' ability to preserve cells from bacterial infection was proved in a co-culture method where cells and bacteria were cultivated in the same environment: the presence of Ga determined a significant reduction of the bacteria viability while allowing at the same time for cells proliferation. In conclusion, the here developed coatings not only demonstrated to satisfy the requested antibacterial and cytocompatibility properties, but also being promising candidates for the improvement of implantable devices in the field of implant dentistry.
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Affiliation(s)
- Agnese D'Agostino
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Francesca Tana
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy.,National Interuniversity Consortium of Materials Science and Technology (INSTM), Local Unit Politecnico di Milano, Florence, Italy
| | - Alessandro Ettorre
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Matteo Pavarini
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy
| | - Andrea Serafini
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Local Unit Politecnico di Milano, Florence, Italy
| | - Andrea Cochis
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases CAAD, Università del Piemonte Orientale UPO, Novara, Italy
| | - Alessandro Calogero Scalia
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases CAAD, Università del Piemonte Orientale UPO, Novara, Italy
| | - Lia Rimondini
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases CAAD, Università del Piemonte Orientale UPO, Novara, Italy
| | - Elvira De Giglio
- Department of Chemistry, Università di Bari Aldo Moro, Bari, Italy
| | | | - Roberto Chiesa
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy.,National Interuniversity Consortium of Materials Science and Technology (INSTM), Local Unit Politecnico di Milano, Florence, Italy
| | - Luigi De Nardo
- Department of Chemistry, Materials and Chemical Engineering 'G. Natta', Politecnico di Milano, Milan, Italy.,National Interuniversity Consortium of Materials Science and Technology (INSTM), Local Unit Politecnico di Milano, Florence, Italy
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2
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Pihl M, Galli S, Jimbo R, Andersson M. Osseointegration and antibacterial effect of an antimicrobial peptide releasing mesoporous titania implant. J Biomed Mater Res B Appl Biomater 2021; 109:1787-1795. [PMID: 33763981 DOI: 10.1002/jbm.b.34838] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/21/2020] [Accepted: 02/22/2021] [Indexed: 01/18/2023]
Abstract
Medical devices such as orthopedic and dental implants may get infected by bacteria, which results in treatment using antibiotics. Since antibiotic resistance is increasing in society there is a need of finding alternative strategies for infection control. One potential strategy is the use of antimicrobial peptides, AMPs. In this study, we investigated the antibiofilm effect of the AMP, RRP9W4N, using a local drug-delivery system based on mesoporous titania covered titanium implants. Biofilm formation was studied in vitro using a safranine biofilm assay and LIVE/DEAD staining. Moreover, we investigated what effect the AMP had on osseointegration of commercially available titanium implants in vivo, using a rabbit tibia model. The results showed a sustained release of AMP with equal or even better antibiofilm properties than the traditionally used antibiotic Cloxacillin. In addition, no negative effects on osseointegration in vivo was observed. These combined results demonstrate the potential of using mesoporous titania as an AMP delivery system and the potential use of the AMP RRP9W4N for infection control of osseointegrating implants.
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Affiliation(s)
- Maria Pihl
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, Göteborg, Sweden
| | - Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, Göteborg, Sweden
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Trincă LC, Mareci D, Solcan C, Fantanariu M, Burtan L, Vulpe V, Hriţcu LD, Souto RM. RETRACTED: In vitro corrosion resistance and in vivo osseointegration testing of new multifunctional beta-type quaternary TiMoZrTa alloys. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110485. [PMID: 31924054 DOI: 10.1016/j.msec.2019.110485] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 07/26/2018] [Accepted: 11/21/2019] [Indexed: 02/02/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of authors. Due to communication issues between Professor dr. Lucia Carmen Trincă and Professor dr. Vizureanu Petrica and Assist. dr. Bălţatu Simona, the first author was not aware that the specimens processed by corrosion by Assoc. Professor dr. Daniel Mareci and evaluated in the aforementioned article would be included by Assistant dr. Bălţatu Simona in her PhD thesis that was defended in June 2017 and then in an international patent application (Indonesia) No: PI 2019006569, in November 2019. The authors understand and respect the intellectual property rights of the international (Indonesia) patent application holders no: PI 2019006569/2019 and thus request the retraction of the article.
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Affiliation(s)
- Lucia Carmen Trincă
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Exact Sciences Department, 700490, Iasi, Romania.
| | - Daniel Mareci
- "Gheorghe Asachi" Technical University of Iasi, Department of Chemical Engineering, 700050, Iasi, Romania
| | - Carmen Solcan
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Preclinics Department, 700489, Iasi, Romania
| | - Mircea Fantanariu
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Clinics Department, 700489, Iasi, Romania
| | - Liviu Burtan
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Clinics Department, 700489, Iasi, Romania.
| | - Vasile Vulpe
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Clinics Department, 700489, Iasi, Romania
| | - Luminiţa-Diana Hriţcu
- "Ion Ionescu de la Brad" University of Agricultural Science and Veterinary Medicine, Clinics Department, 700489, Iasi, Romania
| | - Ricardo Manuel Souto
- Department of Chemistry, Universidad de La Laguna, Avda. Astrofisico Sanchez s/n, 38205 La Laguna, Tenerife (Canary Islands), Spain; Instituto Universitario de Materiales y Nanotecnologias, Universidad de La Laguna, P.O. Box 456, 38200 La Laguna, Tenerife (Canary Islands), Spain.
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Lu X, Xiong S, Chen Y, Zhao F, Hu Y, Guo Y, Wu B, Huang P, Yang B. Effects of statherin on the biological properties of titanium metals subjected to different surface modification. Colloids Surf B Biointerfaces 2020; 188:110783. [PMID: 32004907 DOI: 10.1016/j.colsurfb.2020.110783] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/23/2019] [Accepted: 01/07/2020] [Indexed: 12/13/2022]
Abstract
The failure of dental implants is usually caused by bacteria infection, poor bioactivity and biocompatibility. It is a common phenomenon clinically. Statherin, a salivary protein, plays a crucial role of mediator between materials and cells/bacteria. However, the conformation of statherin might be changed by the implants in vivo. In this study, we investigated the effects of statherin on the bioactivities, antibacterial abilities and biocompatibilities of the titanium metals and the reaction mechanism. We found that the conformation of statherin was mainly influenced by surface composition, surface structure, surface roughness, surface hydrophilia and Ti-OH groups of materials. Statherin could decrease the cell biocompatibility of the titanium metals including pure titanium (PT), anodic oxidation (AO), sandblasting and etching (SLA) and plasma spraying hydroxyapatite (HA) coating in HGF cell experiments, regulate the bio-mineralization ability of HA coating in SBF, and enhance the antibacterial properties of PT and HA coating. This study revealed that surface properties of materials could change the conformation of statherin, which influenced the bioactivities, antibacterial properties and biocompatibilities of the materials in return.
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Affiliation(s)
- Xugang Lu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Shibing Xiong
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yangmei Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Fenghua Zhao
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yi Hu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Yuqiang Guo
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Boyao Wu
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China
| | - Ping Huang
- Panzhihua International Research Institute of Vanadium and Titanium, Panzhihua University, 617000, Panzhihua, Sichuan, China
| | - Bangcheng Yang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610064, China; National Engineering Research Center for Biomaterials, Chengdu, 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu, 610064, China; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, Nanjing, 210046, China.
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5
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Alenezi A, Galli S, Atefyekta S, Andersson M, Wennerberg A. Osseointegration effects of local release of strontium ranelate from implant surfaces in rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:116. [PMID: 31606798 PMCID: PMC6790188 DOI: 10.1007/s10856-019-6314-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 09/21/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Numerous studies have reported the beneficial effects of strontium on bone growth, particularly by stimulating osteoblast proliferation and differentiation. Thus, strontium release around implants has been suggested as one possible strategy to enhance implant osseointegration. AIM This study aimed to evaluate whether the local release of strontium ranelate (Sr-ranelate) from implants coated with mesoporous titania could improve bone formation around implants in an animal model. MATERIALS AND METHODS Mesoporous titania (MT) thin coatings were formed utilizing the evaporation induced self-assembly (EISA) method using Pluronic (P123) with or without the addition of poly propylene glycol (PPG) to create materials with two different pore sizes. The MT was deposited on disks and mini-screws, both made of cp Ti grade IV. Scanning electron microscopy (SEM) was performed to characterize the MT using a Leo Ultra55 FEG instrument (Zeiss, Oberkochen, Germany). The MT was loaded with Sr-ranelate using soaking and the drug uptake and release kinetics to and from the surfaces were evaluated using quartz crystal microbalance with dissipation monitoring (QCM-D) utilizing a Q-sense E4 instrument. For the in vivo experiment, 24 adult rats were analyzed at two time points of implant healing (2 and 6 weeks). Titanium implants shaped as mini screws were coated with MT films and divided into two groups; supplied with Sr-ranelate (test group) and without Sr-ranelate (control group). Four implants (both test and control) were inserted in the tibia of each rat. The in vivo study was evaluated using histomorphometric analyses of the implant/bone interphase using optical microscopy. RESULTS SEM images showed the successful formation of evenly distributed MT films covering the entire surface with pore sizes of 6 and 7.2 nm, respectively. The QCM-D analysis revealed an absorption of 3300 ng/cm2 of Sr-ranelate on the 7.2 nm MT, which was about 3 times more than the observed amount on the 6 nm MT (1200 ng/cm2). Both groups showed sustained release of Sr-ranelate from MT coated disks. The histomorphometric analysis revealed no significant differences in bone implant contact (BIC) and bone area (BA) between the implants with Sr-ranelate and implants in the control groups after 2 and 6 weeks of healing (BIC with a p-value of 0.43 after 2 weeks and 0.172 after 6 weeks; BA with a p-value of 0.503 after 2 weeks, and 0.088 after 6 weeks). The mean BIC and BA values within the same group showed significant increase among all groups between 2 and 6 weeks. CONCLUSION This study could not confirm any positive effects of Sr-ranelate on implant osseointegration.
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Affiliation(s)
- Ali Alenezi
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
- Department of Prosthodontics, College of Dentistry, Qassim University, Buraidah, Saudi Arabia.
| | - Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Saba Atefyekta
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Ann Wennerberg
- Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
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Ghadami F, Saber-Samandari S, Rouhi G, Amani Hamedani M, Dehghan MM, Farzad Mohajeri S, Mashhadi-Abbas F, Gholami H. The effects of bone implants' coating mechanical properties on osseointegration: In vivo, in vitro, and histological investigations. J Biomed Mater Res A 2019; 106:2679-2691. [PMID: 29901269 DOI: 10.1002/jbm.a.36465] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/20/2018] [Accepted: 05/11/2018] [Indexed: 12/26/2022]
Abstract
The main goal of this work was to investigate the effects of implants coatings' mechanical properties and morphology on the osseointegration. In order to produce different mechanical properties of coatings, two thermal spray techniques, high velocity oxy-fuel (HVOF) and air plasma spray (APS) were employed. Titanium pins were coated and implanted into the distal femurs and proximal tibias of fifteen New Zealand white rabbits, equally distributed in three study groups, and a total of 20 pins implanted in each group. Eight weeks after insertion, the rabbits were euthanized and the femur samples were taken out for biomechanical tests and tibia samples for histological evaluations of osseointegration. Scanning electron microscopy results showed enhanced density and a better morphology of HVOF coatings, compared to APS samples, and X-ray diffraction characterized an enhanced crystallinity of HVOF coatings. Nanoindentation tests revealed greater hardness and elastic modulus of HVOF coatings, whereas greater tensile residual stress and more pronounced creep was observed for APS coatings. Neither in biomechanical tests, nor in the histological analyses, a significant difference was observed between HVOF and APS coated samples (p > 0.05, and p > 0.05, respectively). The lack of significant difference between the HVOF and APS coated implants' osseointegration rejected our hypothesis to have a more enhanced osseointegration due to a better morphology, as well as stronger mechanical properties of HA coatings. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2679-2691, 2018.
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Affiliation(s)
- Farhad Ghadami
- Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | | | - Gholamreza Rouhi
- Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | | | - Mohammad Mehdi Dehghan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Saeed Farzad Mohajeri
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Fatemeh Mashhadi-Abbas
- Department of Oral and Maxillofacial Pathology, Dental School, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Hossein Gholami
- Department of Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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7
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Símonarson G, Sommer S, Lotsari A, Elgh B, Iversen BB, Palmqvist AE. Evolution of the Polymorph Selectivity of Titania Formation under Acidic and Low-Temperature Conditions. ACS OMEGA 2019; 4:5750-5757. [PMID: 31459727 PMCID: PMC6648717 DOI: 10.1021/acsomega.8b03440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 02/12/2019] [Indexed: 06/10/2023]
Abstract
Evolution of the polymorph selectivity of titanium dioxide was studied under acidic and low-temperature synthesis conditions. Short synthesis times resulted in high relative amounts of the rutile phase, and long synthesis times resulted in high relative amounts of the brookite and anatase phases. The effect of titania precursor concentration was investigated and found to have a large impact on the polymorph selectivity. As the reaction proceeds with time, changes in the chemical environment, caused in particular by the gradually decreasing titania precursor concentration, are therefore likely the cause of the change in polymorph selectivity observed.
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Affiliation(s)
- Gunnar Símonarson
- Applied
Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Sanna Sommer
- Center
for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
| | - Antiope Lotsari
- Applied
Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Björn Elgh
- Applied
Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Bo B. Iversen
- Center
for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000 Aarhus, Denmark
| | - Anders E.C. Palmqvist
- Applied
Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden
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8
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Zhang R, Elkhooly TA, Huang Q, Liu X, Yang X, Yan H, Xiong Z, Ma J, Feng Q, Shen Z. Effects of the hierarchical macro/mesoporous structure on the osteoblast-like cell response. J Biomed Mater Res A 2018. [DOI: 10.1002/jbm.a.36387] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ranran Zhang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Tarek A. Elkhooly
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
- Department of Ceramics; Inorganic Chemical Industries Division, National Research Center; Cairo 12622 Egypt
| | - Qianli Huang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Xujie Liu
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
- Graduate School at Shenzhen, Tsinghua University; Shenzhen 518055 China
| | - Xing Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Hao Yan
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Zhiyuan Xiong
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Jing Ma
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
| | - Qingling Feng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Key Laboratory of Advanced Materials of Ministry of Education of China; Tsinghua University; Beijing 100084 China
| | - Zhijian Shen
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory; Stockholm University; Stockholm S-106 91 Sweden
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9
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Babitha S, Annamalai M, Dykas MM, Saha S, Poddar K, Venugopal JR, Ramakrishna S, Venkatesan T, Korrapati PS. Fabrication of a biomimetic ZeinPDA nanofibrous scaffold impregnated with BMP-2 peptide conjugated TiO 2 nanoparticle for bone tissue engineering. J Tissue Eng Regen Med 2017; 12:991-1001. [PMID: 28871656 DOI: 10.1002/term.2563] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 07/19/2017] [Accepted: 08/25/2017] [Indexed: 12/28/2022]
Abstract
A biomimetic Zein polydopamine based nanofiber scaffold was fabricated to deliver bone morphogenic protein-2 (BMP-2) peptide conjugated titanium dioxide nanoparticles in a sustained manner for investigating its osteogenic differentiation potential. To prolong its retention time at the target site, BMP-2 peptide has been conjugated to titanium dioxide nanoparticles owing to its high surface to volume ratio. The effect of biochemical cues from BMP-2 peptide and nanotopographical stimulation of electrospun Zein polydopamine nanofiber were examined for its enhanced osteogenic expression of human fetal osteoblast cells. The sustained delivery of bioactive signals, improved cell adhesion, mineralization, and differentiation could be attributed to its highly interconnected nanofibrous matrix with unique material composition. Further, the expression of osteogenic markers revealed that the fabricated nanofibrous scaffold possess better cell-biomaterial interactions. These promising results demonstrate the potential of the composite nanofibrous scaffold as an effective biomaterial substrate for bone regeneration.
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Affiliation(s)
- S Babitha
- Biomaterials Department, CSIR-Central Leather Research Institute, Chennai, India
| | | | - Michal Marcin Dykas
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore
| | - Surajit Saha
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore
| | - Kingshuk Poddar
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore
| | - Jayarama Reddy Venugopal
- Center for Nanofibers and Nanotechnology, Dept of Mechanical Engineering, National University of Singapore (NUS), Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, Dept of Mechanical Engineering, National University of Singapore (NUS), Singapore.,Guangdong-Hongkong-Macau Institute of CNS Regeneration (GHMICR), Jinan University, Guangzhou, China
| | - Thirumalai Venkatesan
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore.,Department of Electrical Engineering, National University of Singapore (NUS), Singapore.,Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore.,Department of Physics, Faculty of Science, National University of Singapore (NUS), Singapore
| | - Purna Sai Korrapati
- Biomaterials Department, CSIR-Central Leather Research Institute, Chennai, India
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10
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Zemtsova EG, Arbenin AY, Yudintceva NM, Valiev RZ, Orekhov EV, Smirnov VM. Bioactive Coating with Two-Layer Hierarchy of Relief Obtained by Sol-Gel Method with Shock Drying and Osteoblast Response of Its Structure. NANOMATERIALS 2017; 7:nano7100323. [PMID: 29027930 PMCID: PMC5666488 DOI: 10.3390/nano7100323] [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: 09/08/2017] [Revised: 10/09/2017] [Accepted: 10/09/2017] [Indexed: 11/16/2022]
Abstract
In this work, we analyze the efficiency of the modification of the implant surface. This modification was reached by the formation of a two-level relief hierarchy by means of a sol-gel approach that included dip coating with subsequent shock drying. Using this method, we fabricated a nanoporous layer with micron-sized defects on the nanotitanium surface. The present work continues an earlier study by our group, wherein the effect of osteoblast-like cell adhesion acceleration was found. In the present paper, we give the results of more detailed evaluation of coating efficiency. Specifically, cytological analysis was performed that included the study of the marker levels of osteoblast-like cell differentiation. We found a significant increase in the activity of alkaline phosphatase at the initial incubation stage. This is very important for implantation, since such an effect assists the decrease in the induction time of implant engraftment. Moreover, osteopontin expression remains high for long expositions. This indicates a prolonged osteogenic effect in the coating. The results suggest the acceleration of the pre-implant area mineralization and, correspondingly, the potential use of the developed coatings for bone implantation.
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Affiliation(s)
- Elena G Zemtsova
- Saint Petersburg State University, Universitetskii pr.26, 198504 Saint Petersburg, Russia.
| | - Andrei Y Arbenin
- Saint Petersburg State University, Universitetskii pr.26, 198504 Saint Petersburg, Russia.
| | - Natalia M Yudintceva
- Institute of Cytology of the Russian Academy of Sciences (RAS), Tikhoretsky ave., 4, 194064 Saint Petersburg, Russia.
| | - Ruslan Z Valiev
- Saint Petersburg State University, Universitetskii pr.26, 198504 Saint Petersburg, Russia.
| | - Evgeniy V Orekhov
- Saint Petersburg State University, Universitetskii pr.26, 198504 Saint Petersburg, Russia.
| | - Vladimir M Smirnov
- Saint Petersburg State University, Universitetskii pr.26, 198504 Saint Petersburg, Russia.
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11
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Zhang R, Elkhooly TA, Huang Q, Liu X, Yang X, Yan H, Xiong Z, Ma J, Feng Q, Shen Z. A dual-layer macro/mesoporous structured TiO 2 surface improves the initial adhesion of osteoblast-like cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:443-451. [DOI: 10.1016/j.msec.2017.04.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 04/13/2017] [Accepted: 04/15/2017] [Indexed: 12/12/2022]
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12
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Galli S, Stocchero M, Andersson M, Karlsson J, He W, Lilin T, Wennerberg A, Jimbo R. The effect of magnesium on early osseointegration in osteoporotic bone: a histological and gene expression investigation. Osteoporos Int 2017; 28:2195-2205. [PMID: 28349251 PMCID: PMC5486930 DOI: 10.1007/s00198-017-4004-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/08/2017] [Indexed: 12/27/2022]
Abstract
UNLABELLED Magnesium has a key role in osteoporosis and could enhance implant osseointegration in osteoporotic patients. Titanium implants impregnated with Mg ions were installed in the tibia of ovariectomized rats. The release of Mg induced a significant increase of bone formation and the expression of anabolic markers in the peri-implant bone. INTRODUCTION The success of endosseous implants is highly predictable in patients possessing normal bone status, but it may be impaired in patients with osteoporosis. Thus, the application of strategies that adjuvate implant healing in compromized sites is of great interest. Magnesium has a key role in osteoporosis prevention and it is an interesting candidate for this purpose. In this study, the cellular and molecular effects of magnesium release from implants were investigated at the early healing stages of implant integration. METHODS Osteoporosis was induced in 24 female rats by means of ovariectomy and low-calcium diet. Titanium mini-screws were coated with mesoporous titania films and were loaded with magnesium (test group) or left as native (control group). The implants were inserted in the tibia and femur of the rats. One, 2 and 7 days after implantation, the implants were retrieved and histologically examined. In addition, expression of genes was evaluated in the peri-implant bone tissue at day 7 by means of quantitative polymerase chain reactions with pathway-oriented arrays. RESULTS The histological evaluation revealed that new bone formation started already during the first week of healing for both groups. However, around the test implants, new bone was significantly more abundant and spread along a larger surface of the implants. In addition, the release of magnesium induced a significantly higher expression of BMP6. CONCLUSIONS These results provide evidence that the release of magnesium promoted rapid bone formation and the activation of osteogenic signals in the vicinity of implants placed in osteoporotic bone.
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Affiliation(s)
- S Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden.
| | - M Stocchero
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - M Andersson
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - J Karlsson
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - W He
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - T Lilin
- Center for Biomedical Research, ECole Nationale Vétérinaire d'Alfort, 94700, Maisons Alfort, France
| | - A Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
| | - R Jimbo
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
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13
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Galli S, Andersson M, Jinno Y, Karlsson J, He W, Xue Y, Mustafa K, Wennerberg A, Jimbo R. Magnesium release from mesoporous carriers on endosseus implants does not influence bone maturation at 6 weeks in rabbit bone. J Biomed Mater Res B Appl Biomater 2016; 105:2118-2125. [PMID: 27405685 DOI: 10.1002/jbm.b.33752] [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: 02/11/2016] [Revised: 06/20/2016] [Accepted: 06/26/2016] [Indexed: 11/10/2022]
Abstract
OBJECTIVES The release of magnesium ions (Mg2+ ) from titanium surfaces has been shown to boost the initial biological response of peri-implant bone and to increase the biomechanical strength of osseointegration. The objective of the present paper was to investigate if the initial improvement in osseointegration would influence the bone remodeling also during the maturation stage of bone healing. METHODS Titanium implants were coated with mesoporous titania layers and either loaded with Mg2+ (test group) or left untreated (control group). The implants were inserted in the tibiae of 10 New Zealand White rabbits. Osseointegration was assessed after 6 weeks by means of biomechanical testing (RTQ), non-decalcified histology and histomorphometry (BIC%, BA%, NBA%). The expression of genes involved in the bone formation and remodeling was quantified using qPCR. RESULTS Mg2+ releasing mesoporous titania coatings showed, on average, higher removal torques and histomorphometrical outcomes (RTQ: 17.2 Ncm vs. 15 Ncm; BIC: 38.8% vs. 32.1%; BA%: 71.6% vs. 64%; NBA% 62.5% vs. 54% for the tests vs the controls); however, the differences were not statistically significant. Three osteogenic markers, osteocalcin (OC), collagen 1 alpha 1 (COL1A1), and alkalin phosphatase (ALPL), were respectively 2-fold, 1.53-fold, and 1.13-fold up-regulated in the control group compared to the test. The expression of COL1A1 was particularly high in both groups, while the biomarkers for remodeling and inflammation showed a low expression in both groups. SIGNIFICANCE The results suggested that the initial enhancement in osseointegration induced by magnesium release from mesoporous titania coatings has no detrimental effects during bone maturation. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2118-2125, 2017.
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Affiliation(s)
- Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - Yohei Jinno
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
| | - Johan Karlsson
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - Wenxiao He
- Department of Chemistry and Chemical Engineering, Applied Chemistry, Chalmers University of Technology, 412 96, Gothenburg, Sweden
| | - Ying Xue
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden.,Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden
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Cecchinato F, Atefyekta S, Wennerberg A, Andersson M, Jimbo R, Davies JR. Modulation of the nanometer pore size improves magnesium adsorption into mesoporous titania coatings and promotes bone morphogenic protein 4 expression in adhering osteoblasts. Dent Mater 2016; 32:e148-58. [DOI: 10.1016/j.dental.2016.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 03/18/2016] [Accepted: 04/22/2016] [Indexed: 12/24/2022]
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15
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Karlsson J, Harmankaya N, Palmquist A, Atefyekta S, Omar O, Tengvall P, Andersson M. Stem cell homing using local delivery of plerixafor and stromal derived growth factor-1alpha for improved bone regeneration around Ti-implants. J Biomed Mater Res A 2016; 104:2466-75. [DOI: 10.1002/jbm.a.35786] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/16/2016] [Accepted: 05/18/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Johan Karlsson
- Department Of Chemistry and Chemical Engineering; Applied Chemistry, Chalmers University of Technology; Gothenburg Sweden
| | - Necati Harmankaya
- Department Of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm Sweden
| | - Anders Palmquist
- Department Of Biomaterials; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
| | - Saba Atefyekta
- Department Of Chemistry and Chemical Engineering; Applied Chemistry, Chalmers University of Technology; Gothenburg Sweden
| | - Omar Omar
- Department Of Biomaterials; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
| | - Pentti Tengvall
- Department Of Biomaterials; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
| | - Martin Andersson
- Department Of Chemistry and Chemical Engineering; Applied Chemistry, Chalmers University of Technology; Gothenburg Sweden
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16
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Atefyekta S, Ercan B, Karlsson J, Taylor E, Chung S, Webster TJ, Andersson M. Antimicrobial performance of mesoporous titania thin films: role of pore size, hydrophobicity, and antibiotic release. Int J Nanomedicine 2016; 11:977-90. [PMID: 27022263 PMCID: PMC4790524 DOI: 10.2147/ijn.s95375] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Implant-associated infections are undesirable complications that might arise after implant surgery. If the infection is not prevented, it can lead to tremendous cost, trauma, and even life threatening conditions for the patient. Development of an implant coating loaded with antimicrobial substances would be an effective way to improve the success rate of implants. In this study, the in vitro efficacy of mesoporous titania thin films used as a novel antimicrobial release coating was evaluated. Mesoporous titania thin films with pore diameters of 4, 6, and 7 nm were synthesized using the evaporation-induced self-assembly method. The films were characterized and loaded with antimicrobial agents, including vancomycin, gentamicin, and daptomycin. Staphylococcus aureus and Pseudomonas aeruginosa were used to evaluate their effectiveness toward inhibiting bacterial colonization. Drug loading and delivery were studied using a quartz crystal microbalance with dissipation monitoring, which showed successful loading and release of the antibiotics from the surfaces. Results from counting bacterial colony-forming units showed reduced bacterial adhesion on the drug-loaded films. Interestingly, the presence of the pores alone had a desired effect on bacterial colonization, which can be attributed to the documented nanotopographical effect. In summary, this study provides significant promise for the use of mesoporous titania thin films for reducing implant infections.
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Affiliation(s)
- Saba Atefyekta
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Batur Ercan
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA; Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey
| | - Johan Karlsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Erik Taylor
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Stanley Chung
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Thomas J Webster
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
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17
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Karlsson J, Martinelli A, Fathali HM, Bielecki J, Andersson M. The effect of alendronate on biomineralization at the bone/implant interface. J Biomed Mater Res A 2015; 104:620-629. [PMID: 26507381 DOI: 10.1002/jbm.a.35602] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/20/2015] [Accepted: 10/22/2015] [Indexed: 11/11/2022]
Abstract
A recent approach to improve the osseointegration of implants is to utilize local drug administration. The presence of an osteoporosis drug may influence both bone quantity and quality at the bone/implant interface. Despite this, the performance of bone-anchoring implants is traditionally evaluated only by quantitative measurements. In the present study, the osteoporosis drug alendronate (ALN) was administrated from mesoporous titania thin films that were coated onto titanium implants. The effect that the drug had on biomineralization was explored both in vitro using simulated body fluid (SBF) and in vivo in a rat tibia model. The SBF study showed that the apatite formation was completely hindered at a high concentration of ALN (0.1 mg/mL). However, when ALN was administrated from the mesoporous coating the surface became completely covered with apatite. Ex vivo characterization of the bone/implant interface using Raman spectroscopy demonstrated that the presence of ALN enhanced the bone mineralization, and that the chemical signature of newly formed bone in the presence of ALN had a higher resemblance to the pre-existing mature bone than to the bone formed without drug. Taken together, this study demonstrates the importance of evaluating the quality of the formed bone to better understand the performance of implants. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part A 104A: 620-629, 2016.
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Affiliation(s)
- Johan Karlsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Anna Martinelli
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Hoda M Fathali
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Johan Bielecki
- Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden
| | - Martin Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
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18
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Karlsson J, Atefyekta S, Andersson M. Controlling drug delivery kinetics from mesoporous titania thin films by pore size and surface energy. Int J Nanomedicine 2015; 10:4425-36. [PMID: 26185444 PMCID: PMC4501225 DOI: 10.2147/ijn.s83005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The osseointegration capacity of bone-anchoring implants can be improved by the use of drugs that are administrated by an inbuilt drug delivery system. However, to attain superior control of drug delivery and to have the ability to administer drugs of varying size, including proteins, further material development of drug carriers is needed. Mesoporous materials have shown great potential in drug delivery applications to provide and maintain a drug concentration within the therapeutic window for the desired period of time. Moreover, drug delivery from coatings consisting of mesoporous titania has shown to be promising to improve healing of bone-anchoring implants. Here we report on how the delivery of an osteoporosis drug, alendronate, can be controlled by altering pore size and surface energy of mesoporous titania thin films. The pore size was varied from 3.4 nm to 7.2 nm by the use of different structure-directing templates and addition of a swelling agent. The surface energy was also altered by grafting dimethylsilane to the pore walls. The drug uptake and release profiles were monitored in situ using quartz crystal microbalance with dissipation (QCM-D) and it was shown that both pore size and surface energy had a profound effect on both the adsorption and release kinetics of alendronate. The QCM-D data provided evidence that the drug delivery from mesoporous titania films is controlled by a binding-diffusion mechanism. The yielded knowledge of release kinetics is crucial in order to improve the in vivo tissue response associated to therapeutic treatments.
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Affiliation(s)
- Johan Karlsson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Saba Atefyekta
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Martin Andersson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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19
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Cecchinato F, Karlsson J, Ferroni L, Gardin C, Galli S, Wennerberg A, Zavan B, Andersson M, Jimbo R. Osteogenic potential of human adipose-derived stromal cells on 3-dimensional mesoporous TiO2 coating with magnesium impregnation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 52:225-34. [DOI: 10.1016/j.msec.2015.03.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 02/18/2015] [Accepted: 03/21/2015] [Indexed: 01/21/2023]
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20
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Assessment of Atmospheric Pressure Plasma Treatment for Implant Osseointegration. BIOMED RESEARCH INTERNATIONAL 2015; 2015:761718. [PMID: 26090443 PMCID: PMC4452268 DOI: 10.1155/2015/761718] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/18/2015] [Accepted: 01/23/2015] [Indexed: 01/05/2023]
Abstract
This study assessed the osseointegrative effects of atmospheric pressure plasma (APP) surface treatment for implants in a canine model. Control surfaces were untreated textured titanium (Ti) and calcium phosphate (CaP). Experimental surfaces were their 80-second air-based APP-treated counterparts. Physicochemical characterization was performed to assess topography, surface energy, and chemical composition. One implant from each control and experimental group (four in total) was placed in one radius of each of the seven male beagles for three weeks, and one implant from each group was placed in the contralateral radius for six weeks. After sacrifice, bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) were assessed. X-ray photoelectron spectroscopy showed decreased surface levels of carbon and increased Ti and oxygen, and calcium and oxygen, posttreatment for Ti and CaP surfaces, respectively. There was a significant (P < 0.001) increase in BIC for APP-treated textured Ti surfaces at six weeks but not at three weeks or for CaP surfaces. There were no significant (P = 0.57) differences for BAFO between treated and untreated surfaces for either material at either time point. This suggests that air-based APP surface treatment may improve osseointegration of textured Ti surfaces but not CaP surfaces. Studies optimizing APP parameters and applications are warranted.
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21
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Galli S, Naito Y, Karlsson J, He W, Miyamoto I, Xue Y, Andersson M, Mustafa K, Wennerberg A, Jimbo R. Local release of magnesium from mesoporous TiO2 coatings stimulates the peri-implant expression of osteogenic markers and improves osteoconductivity in vivo. Acta Biomater 2014; 10:5193-5201. [PMID: 25153781 DOI: 10.1016/j.actbio.2014.08.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 08/03/2014] [Accepted: 08/10/2014] [Indexed: 11/17/2022]
Abstract
Local release of Mg ions from titanium implant surfaces has been shown to enhance implant retention and integration. To clarify the biological events that lead to this positive outcome, threaded implants coated with mesoporous TiO2 thin films were loaded with Mg-ions and placed in the tibia of rabbits for 3weeks, after surface characterization. Non-loaded mesoporous coated implants were used as controls. Peri-implant gene expression of a set of osteogenic and inflammatory assays was quantified by means of real-time quantitative polymerase chain reaction. The expression of three osteogenic markers (OC, RUNX-2 and IGF-1) was significantly more pronounced in the test specimens, suggesting that the release of Mg ions directly at the implant sites may stimulate an osteogenic environment. Furthermore, bone healing around implants was evaluated on histological slides and by diffraction-enhanced imaging (DEI), using synchrotron radiation. The histological analysis demonstrated new bone formation around all implants, without negative responses, with a significant increase in the number of threads filled with new bone for test surfaces. DEI analysis attested the high mineral content of the newly formed bone. Improved surface osteoconductivity and increased expression of genes involved in the bone regeneration were found for magnesium-incorporation of mesoporous TiO2 coatings.
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Affiliation(s)
- Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06 Malmö, Sweden.
| | - Yoshihito Naito
- Oral Implant Center, Tokushima University Hospital, Tokushima, Japan
| | - Johan Karlsson
- Department of Chemical and Biological Engineering, Applied Surface Chemistry, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Wenxiao He
- Department of Chemical and Biological Engineering, Applied Surface Chemistry, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Ikuya Miyamoto
- Division of Oral Medicine, Kyushu Dental University, Fukuoka, Japan
| | - Ying Xue
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Martin Andersson
- Department of Chemical and Biological Engineering, Applied Surface Chemistry, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Kamal Mustafa
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06 Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, 205 06 Malmö, Sweden; Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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Antibacterial Activity of As-Annealed TiO2 Nanotubes Doped with Ag Nanoparticles against Periodontal Pathogens. Bioinorg Chem Appl 2014; 2014:829496. [PMID: 25202230 PMCID: PMC4151538 DOI: 10.1155/2014/829496] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/26/2014] [Accepted: 07/26/2014] [Indexed: 11/18/2022] Open
Abstract
It is important to develop functional transmucosal implant surfaces that reduce the number of initially adhering bacteria and they need to be modified to improve the anti-bacterial performance. Commercially pure Ti sheets were anodized in an electrolyte containing ethylene glycol, distilled water and ammonium fluoride at room temperature to produce TiO2 nanotubes. These structures were then annealed at 450°C to transform them to anatase. As-annealed TiO2 nanotubes were then treated in an electrolyte containing 80.7 g/L NiSO4·7H2O, 41 g/L MgSO4·7H2O, 45 g/L H3BO3, and 1.44 g/L Ag2SO4 at 20°C by the application of 9 V AC voltage for doping them with silver. As-annealed TiO2 nanotubes and as-annealed Ag doped TiO2 nanotubes were evaluated by SEM, FESEM, and XRD. Antibacterial activity was assessed by determining the adherence of A. actinomycetemcomitans, T. forsythia, and C. rectus to the surface of the nanotubes. Bacterial morphology was examined using an SEM. As-annealed Ag doped TiO2 nanotubes revealed intense peak of Ag. Bacterial death against the as-annealed Ag doped TiO2 nanotubes were detected against A. actinomycetemcomitans, T. forsythia, and C. rectus indicating antibacterial efficacy.
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Karlsson J, Sundell G, Thuvander M, Andersson M. Atomically resolved tissue integration. NANO LETTERS 2014; 14:4220-4223. [PMID: 24989063 DOI: 10.1021/nl501564f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In the field of biomedical technology, a critical aspect is the ability to control and understand the integration of an implantable device in living tissue. Despite the technical advances in the development of biomaterials, the elaborate interplay encompassing materials science and biology on the atomic level is not very well understood. Within implantology, anchoring a biomaterial device into bone tissue is termed osseointegration. In the most accepted theory, osseointegration is defined as an interfacial bonding between implant and bone; however, there is lack of experimental evidence to confirm this. Here we show that atom probe tomography can be used to study the implant-tissue interaction, allowing for three-dimensional atomic mapping of the interface region. Interestingly, our analyses demonstrated that direct contact between Ca atoms and the implanted titanium oxide surface is formed without the presence of a protein interlayer, which means that a pure inorganic interface is created, hence giving experimental support to the current theory of osseointegration. We foresee that this result will be of importance in the development of future biomaterials as well as in the design of in vitro evaluation techniques.
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Affiliation(s)
- Johan Karlsson
- Department of Chemical and Biological Engineering, Chalmers University of Technology , Kemivägen 10 SE-412 96 Gothenburg, Sweden
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Nguyen TDT, Moon SH, Oh TJ, Park IS, Lee MH, Bae TS. The effect of APH treatment on surface bonding and osseointegration of Ti-6Al-7Nb implants: an in vitro and in vivo study. J Biomed Mater Res B Appl Biomater 2014; 103:641-8. [PMID: 24976109 DOI: 10.1002/jbm.b.33210] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 04/13/2014] [Accepted: 04/29/2014] [Indexed: 01/29/2023]
Abstract
This study investigated the effects of anodization-cyclic precalcification-heat (APH) treatment on the bonding ability of Ca-P coating to the parent metal and osseointegration of Ti-6Al-7Nb implants. Eighteen Ti-6Al-7Nb discs, 9 untreated and 9 APH-treated, were cultured with osteoblast cells in vitro, and the cellular differentiation ability was assayed at 1, 2, and 3 weeks. For in vivo testing, 28 Ti-6Al-7Nb implants (14 implants of each group) were inserted to rat tibias, and after each 4 and 6 weeks of implantation, bone bonding, and osseointegration were evaluated through removal torque and histological analysis. Osteoblast-culturing showed twice as much of the alkaline phosphatase activity on the treated surface at 3 weeks than on the untreated surface (p < 0.05). The treated implants exhibited higher removal torque values than the untreated ones (15.5 vs. 1.8 Ncm at 4 weeks and 19.7 vs. 2.6 Ncm at 6 weeks, p < 0.05). Moreover, the excellent bonding quality of coats was confirmed by the existence of cohesive fractures on the surface of removed APH implants (field emission scanning electron microscopy and histological observation). Within the limits of this study, it can be concluded that the APH treatment significantly enhanced osseointegration of the Ti-6Al-7Nb implant, with the stable bonding between the coating and the implant surface.
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Affiliation(s)
- Thuy-Duong Thi Nguyen
- Department of Dental Biomaterials and Institute of Oral Bioscience, Brain Korea 21 Plus Project, School of Dentistry, Chonbuk National University, Jeonju, 561-756, South Korea
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Zhu M, Zhu Y, Ni B, Xie N, Lu X, Shi J, Zeng Y, Guo X. Mesoporous silica nanoparticles/hydroxyapatite composite coated implants to locally inhibit osteoclastic activity. ACS APPLIED MATERIALS & INTERFACES 2014; 6:5456-5466. [PMID: 24666121 DOI: 10.1021/am405013t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In an attempt to improve implant-bone integration and accelerate bone fracture healing from resisting osteoclastic resorption point of view, we have employed a novel procedure to develop a mesoporous silica nanoparticles/hydroxyapatite (MSNs/HA) composite coating onto stainless Kirschner wire substrate. Characterizations of the surface microstructures indicated enlarged specific surface area compared to HA-coated wires as control, thus the MSNs/HA composite coated implants are endowed with abilities to locally deliver biomedical substances and enhance fracture healing. Herein, zoledronic acid (ZOL) as a model drug, different doses of which were immobilized in the mesoporous coating toward decreasing osteoclastic resorption activity. The loading capacities of ZOL increased almost eight-folds to that of pure HA coating, and the introduction of MSNs obviously retarded ZOL release to achieve a more sustained release profile. After certain periods of osteoclast like cells co-culturing with ZOL contained wires, tartrat-resistant acid phosphatases (TRAP) staining of polynucleated cells and a pit formation assay were performed to investigate the ZOL dose-dependent anti-resorption activity. The promoted local effect on osteoclasts will be of clinical benefit to support implant integration and bone repair.
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Affiliation(s)
- Min Zhu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology , Shanghai, P. R. China
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Galli S, Naito Y, Karlsson J, He W, Andersson M, Wennerberg A, Jimbo R. Osteoconductive Potential of Mesoporous Titania Implant Surfaces Loaded with Magnesium: An Experimental Study in the Rabbit. Clin Implant Dent Relat Res 2014; 17:1048-59. [PMID: 25178845 DOI: 10.1111/cid.12211] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mesoporous coatings enable incorporation of functional substances and sustainedly release them at the implant site. One bioactive substance that can be incorporated in mesoporous is magnesium, which is strongly involved in bone metabolism and in osteoblast interaction. PURPOSE The aim of this experimental study was to evaluate the effect of incorporation of magnesium into mesoporous coatings of oral implants on early stages of osseointegration. MATERIAL AND METHODS Titanium implants were coated with thin films of mesoporous TiO2 having pore diameters of 6 nm and were loaded with magnesium. The implant surfaces were extensively characterized by means of interferometry, atomic force microscopy, scanning electron microscopy, and energy-dispersive spectroscopy and then placed in the tibiae of 10 rabbits. After 3 weeks of healing, osseointegration was evaluated by means of removal torque testing and histology and histomorphometry. RESULTS Histological and biomechanical analyses revealed no side effects and successful osseointegration of the implants. The biomechanical evaluation evidenced a significant effect of magnesium doping on strengthening the implant-bone interface. CONCLUSIONS A local release of magnesium from the implant surfaces enhances implant retention at the early stage of healing (3 weeks after implantation), which is highly desirable for early loading of the implant.
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Affiliation(s)
- Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Yoshihito Naito
- Department of Oral and Maxillofacial Prosthodontics and Oral Implantology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Johan Karlsson
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Wenxiao He
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Martin Andersson
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
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Cecchinato F, Xue Y, Karlsson J, He W, Wennerberg A, Mustafa K, Andersson M, Jimbo R. In vitro evaluation of human fetal osteoblast response to magnesium loaded mesoporous TiO2 coating. J Biomed Mater Res A 2013; 102:3862-71. [PMID: 24339394 DOI: 10.1002/jbm.a.35062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/21/2013] [Accepted: 12/09/2013] [Indexed: 11/08/2022]
Abstract
This work aimed to evaluate the in vitro response of Transfected Human Foetal Osteoblast (hFOB) cultured on a magnesium-loaded mesoporous TiO2 coating. The application of mesoporous films on titanium implant surfaces has shown very promising potential to enhance osseointegration. This type of coating has the ability to act as a framework to sustain bioactive agents and different drugs. Magnesium is the element that, after calcium, is the most frequently used to dope titanium implant surfaces, since it is crucial for protein formation, growth factor expression, and aids for bone mineral deposition on implant surfaces. Mesoporous TiO2 films with an average pore-size of 6 nm were produced by the evaporation-induced self-assembly method (EISA) and deposited onto titanium discs. Magnesium loading was performed by soaking the mesoporous TiO2 discs in a magnesium chloride solution. Surface characterization was conducted by SEM, XPS, optical interferometry, and AFM. Magnesium release profile was assessed at different time points using a Magnesium Detection kit. Cell morphology and spreading were observed with SEM. The cytoskeletal organization was stained with TRITC-conjugated Phalloidin and cell viability was evaluated through a mitochondrial colorimetric (MTT) assay. Furthermore, gene expression of bone markers and cell mineralization were analyzed by real time RT-PCR and alizarin-red staining, respectively. The surface chemical analysis by XPS revealed the successful adsorption of magnesium to the mesoporous coating. The AFM measurements revealed the presence of a nanostructured surface roughness. Osteoblasts viability and adhesion as well as the gene expression were unaffected by the addition of magnesium possibly due to its rapid burst release, however, were enhanced by the 3D nanostructure of the TiO2 layer.
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Affiliation(s)
- Francesca Cecchinato
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
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Jimbo R, Janal MN, Marin C, Giro G, Tovar N, Coelho PG. The effect of implant diameter on osseointegration utilizing simplified drilling protocols. Clin Oral Implants Res 2013; 25:1295-1300. [PMID: 25040139 DOI: 10.1111/clr.12268] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To observe and to compare histologically and histomorphometrically, the combined effect of drilling sequence and implant diameter in vivo. MATERIAL AND METHODS A total of 72 alumina-blasted and acid-etched Ti-6Al-4V implants with three different diameters (3.75, 4.2, and 5 mm, n = 24 for each group) were placed in the right and left tibiae of 12 beagle dogs. Within the same diameter group, half of the implants were inserted after a simplified drilling procedure (pilot drill + final diameter drill) on one tibia and the other half were placed using the conventional drilling procedure on the other tibia. After 1 week, half of the animals (n = 6) were sacrificed, and the other half was sacrificed after 5 weeks (n = 6). The retrieved bone-implant samples were subjected to non-decalcified histologic sectioning, and the bone-to-implant contact (BIC) and the bone area fraction occupancy (BAFO) were analyzed. Primary statistical analysis used a mixed model analysis of variance with significance level set at P < 0.05. RESULTS Histologic observation showed that at 1 week, immature woven bone formed in vicinity of the implant, whereas at 5 weeks, the woven bone was replaced by lamellar bone, which formed in proximity with the implant. Histomorphometrically, the simplified technique was associated with significantly greater BIC and BAFO after 1 week. Differences between techniques were not longer apparent after 5 weeks, but BAFO was inversely and significantly associated with implant diameter at that time. CONCLUSIONS The simplified technique did not impair either early or late bone formation for any tested implant diameter; however, wider diameters were associated with less bone formation at longer healing times for both techniques.
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Affiliation(s)
- Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Malvin N Janal
- Department of Epidemiology and Health Promotion, New York University, New York, NY, USA
| | - Charles Marin
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, Universidade Federal de Santa Catarina, Brazil
| | - Gabriela Giro
- Department of Biomaterials and Biomimetics, New York University, New York, NY, USA
| | - Nick Tovar
- Department of Biomaterials and Biomimetics, New York University, New York, NY, USA
| | - Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University, New York, NY, USA
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Characteristics of 2 Different Commercially Available Implants with or without Nanotopography. Int J Dent 2013; 2013:769768. [PMID: 24223592 PMCID: PMC3808707 DOI: 10.1155/2013/769768] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 07/21/2013] [Indexed: 12/19/2022] Open
Abstract
The aim of this study was to assess histologically and histomorphometrically the early bone forming properties after 3 weeks for 2 commercially available implants, one supposedly possessing nanotopography and one without, in a rabbit femur model. Twenty-four implants divided equally into 2 groups were utilized in this study. The first group (P-I MICRO+NANO) was a titanium oxide (TiO2) microblasted and noble gas ion bombarded surface while the second group (Ospol) was anodic oxidized surface with calcium and phosphate incorporation. The implants were placed in the rabbit femur unicortically and were allowed to heal for 3 weeks. After euthanasia, the samples were subjected to histologic sectioning and bone-implant contact and bone area were evaluated histomorphometrically under an optical microscope. The histomorphometric evaluation presented that the P-I MICRO+NANO implants demonstrated significantly higher new bone formation as compared to the Ospol implants. Within the limitations of this study, the results suggested that nanostructures presented significantly higher bone formation after 3 weeks in vivo, and the effect of chemistry was limited, which is indicative that nanotopography is effective at early healing periods.
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Harmankaya N, Karlsson J, Palmquist A, Halvarsson M, Igawa K, Andersson M, Tengvall P. Raloxifene and alendronate containing thin mesoporous titanium oxide films improve implant fixation to bone. Acta Biomater 2013; 9:7064-73. [PMID: 23467043 DOI: 10.1016/j.actbio.2013.02.040] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 02/22/2013] [Accepted: 02/23/2013] [Indexed: 10/27/2022]
Abstract
This study tested the hypothesis that osteoporosis drug-loaded mesoporous TiO2 implant coatings can be used to improve bone-implant integration. Two osteoporosis drugs, Alendronate (ALN) and Raloxifene (RLX), were immobilized in nanoporous oxide films prepared on Ti screws and evaluated in vivo in rat tibia. The drug release kinetics were monitored in vitro by quartz crystal microbalance with dissipation and showed sustained release of both drugs. The osteogenic response after 28days of implantation was evaluated by quantitative polymerase chain reaction (qPCR), removal torque, histomorphometry and ultrastructural interface analysis. The drug-loaded implants showed significantly improved bone fixation. In the case of RLX, stronger bone-remodelling activity was observed compared with controls and ALN-loaded implants. The ultrastructural interface analysis revealed enhanced apatite formation inside the RLX coating and increased bone density outside the ALN coating. Thus, this novel combination of a thin mesoporous TiO2 carrier matrix and appropriate drugs can be used to accelerate implant fixation in trabecular bone.
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Plasma treatment maintains surface energy of the implant surface and enhances osseointegration. Int J Biomater 2013; 2013:354125. [PMID: 23365578 PMCID: PMC3556447 DOI: 10.1155/2013/354125] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 11/25/2012] [Indexed: 11/22/2022] Open
Abstract
The surface energy of the implant surface has an impact on osseointegration. In this study, 2 surfaces: nonwashed resorbable blasting media (NWRBM; control) and Ar-based nonthermal plasma 30 days (Plasma 30 days; experimental), were investigated with a focus on the surface energy. The surface energy was characterized by the Owens-Wendt-Rabel-Kaelble method and the chemistry by X-ray photoelectron spectroscopy (XPS). Five adult beagle dogs received 8 implants (n = 2 per surface, per tibia). After 2 weeks, the animals were euthanized, and half of the implants (n = 20) were removal torqued and the other half were histologically processed (n = 20). The bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) were evaluated on the histologic sections. The XPS analysis showed peaks of C, Ca, O, and P for the control and experimental surfaces. While no significant difference was observed for BIC parameter (P > 0.75), a higher level for torque (P < 0.02) and BAFO parameter (P < 0.01) was observed for the experimental group. The surface elemental chemistry was modified by the plasma and lasted for 30 days after treatment resulting in improved biomechanical fixation and bone formation at 2 weeks compared to the control group.
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