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Leesungbok R, Hong SO, Lee SW, Htay PEE, Choi JJ, Park JJ. An eight-year retrospective study on the clinical outcomes of laser surface-treated implants. Int J Implant Dent 2024; 10:38. [PMID: 39101986 DOI: 10.1186/s40729-024-00558-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Accepted: 07/23/2024] [Indexed: 08/06/2024] Open
Abstract
PURPOSE To retrospectively evaluate peri-implant bone loss and health status associated with the long-term use of laser surface-treated implants. METHODS For control study, total of 23 titanium ASTM F136 grade 23 implants were placed in the edentulous molar area of the mandible. When the Implant Stability Quotient (ISQ) ≥ 70 and insertion torque value (ITV) ≥ 35-50 Ncm at the insertion site, an immediate provisional restoration was connected to the implant within a week after surgery. The definitive restorations were placed 2 months after surgery for all implants. 13 implants were immediately loaded, while 10 implants were conventionally loaded. For comparative study, Radiographs were taken from third years for and then annually for the subsequent eight years to monitor marginal bone loss. RESULTS After eight year of implant installation, the average change in vertical bone loss was 0.009 mm (P < 0.001), while the average change in horizontal bone loss 8 year after implant placement was 0.026 mm (P < 0.001). The mean marginal bone loss was < 0.2 mm on average. CONCLUSIONS In this retrospective study, laser-treated implants exhibit a low rate of bone absorption around the implants.
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Affiliation(s)
- Richard Leesungbok
- Department of Biomaterials and Prosthodontics, Kyung Hee University Dental Hospital at Gangdong, Kyung Hee University College of Dentistry, Dongnamro 892, Gangdong-Gu, Seoul, 05278, Republic of Korea.
- Professor Emeritus, Kyung Hee University School of Dentistry, Seoul, South Korea.
| | - Sung Ok Hong
- Department of Oral and Maxillofacial Surgery, Kyung Hee University Dental Hospital at Gangdong, Kyung Hee University College of Dentistry, Dongnamro 892, Gangdong-Gu, Seoul, 05278, Republic of Korea.
| | - Suk-Won Lee
- Department of Biomaterials and Prosthodontics, Kyung Hee University Dental Hospital at Gangdong, Kyung Hee University College of Dentistry, Dongnamro 892, Gangdong-Gu, Seoul, 05278, Republic of Korea
| | - Phyo Ei Ei Htay
- Department of Biomaterials and Prosthodontics, Kyung Hee University Dental Hospital at Gangdong, Kyung Hee University College of Dentistry, Dongnamro 892, Gangdong-Gu, Seoul, 05278, Republic of Korea
| | - Joseph Junesirk Choi
- Department of Biomaterials and Prosthodontics, Kyung Hee University Dental Hospital at Gangdong, Kyung Hee University College of Dentistry, Dongnamro 892, Gangdong-Gu, Seoul, 05278, Republic of Korea
| | - Jung Jin Park
- Department of Orthodontics, Dental Hospital, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea
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Komatsu K, Matsuura T, Cheng J, Kido D, Park W, Ogawa T. Nanofeatured surfaces in dental implants: contemporary insights and impending challenges. Int J Implant Dent 2024; 10:34. [PMID: 38963524 PMCID: PMC11224214 DOI: 10.1186/s40729-024-00550-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 05/27/2024] [Indexed: 07/05/2024] Open
Abstract
Dental implant therapy, established as standard-of-care nearly three decades ago with the advent of microrough titanium surfaces, revolutionized clinical outcomes through enhanced osseointegration. However, despite this pivotal advancement, challenges persist, including prolonged healing times, restricted clinical indications, plateauing success rates, and a notable incidence of peri-implantitis. This review explores the biological merits and constraints of microrough surfaces and evaluates the current landscape of nanofeatured dental implant surfaces, aiming to illuminate strategies for addressing existing impediments in implant therapy. Currently available nanofeatured dental implants incorporated nano-structures onto their predecessor microrough surfaces. While nanofeature integration into microrough surfaces demonstrates potential for enhancing early-stage osseointegration, it falls short of surpassing its predecessors in terms of osseointegration capacity. This discrepancy may be attributed, in part, to the inherent "dichotomy kinetics" of osteoblasts, wherein increased surface roughness by nanofeatures enhances osteoblast differentiation but concomitantly impedes cell attachment and proliferation. We also showcase a controllable, hybrid micro-nano titanium model surface and contrast it with commercially-available nanofeatured surfaces. Unlike the commercial nanofeatured surfaces, the controllable micro-nano hybrid surface exhibits superior potential for enhancing both cell differentiation and proliferation. Hence, present nanofeatured dental implants represent an evolutionary step from conventional microrough implants, yet they presently lack transformative capacity to surmount existing limitations. Further research and development endeavors are imperative to devise optimized surfaces rooted in fundamental science, thereby propelling technological progress in the field.
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Affiliation(s)
- Keiji Komatsu
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - Takanori Matsuura
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - James Cheng
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA
- Section of Periodontics, UCLA School of Dentistry, Los Angeles, USA
| | - Daisuke Kido
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
| | - Wonhee Park
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA
- Department of Dentistry, College of Medicine, Hanyang University, Seoul, Korea
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, USA.
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, USA.
- Weintraub Center for Reconstructive Biotechnology, Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue B3-087, Box951668, Los Angeles, CA, 90095-1668, USA.
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3
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Traver-Méndez V, Camps-Font O, Ventura F, Nicolau-Sansó MA, Subirà-Pifarré C, Figueiredo R, Valmaseda-Castellón E. In Vitro Characterization of an Anodized Surface of a Dental Implant Collar and Dental Abutment on Peri-Implant Cellular Response. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6012. [PMID: 37687706 PMCID: PMC10489139 DOI: 10.3390/ma16176012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 09/10/2023]
Abstract
The purpose of this paper was to determine the effect of anodization on the in vitro proliferation and adhesion of immortalized human keratinocytes (HaCats) and mouse bone marrow-derived mesenchymal stem cells (BM-MSCs) in Titanium Grade 23 (Ti6Al4V ELI) discs and to describe the surface topography, roughness, and composition of dental implants (body and collar) and abutments submitted to an area-specific anodization process. HaCat cells and BM-MSCs were seeded onto discs with three different surface treatments: machined, area-specific anodization for abutments, and area-specific anodization for implant collars. Cell proliferation was assessed using a resazurin-based fluorescent dye on days 1, 3, and 7, while cell adhesion was examined using scanning electron microscopy (SEM). Surface topography, roughness, and composition were evaluated for six implant bodies with an anodized rough surface, six anodized implant smooth collars, and six anodized prosthetic abutments. Both HaCats and BM-MSCs showed increased viability over time (p < 0.001) with no statistically significant differences among the different surfaces (p = 0.447 HaCats and p = 0.631 BM-MSCs). SEM analysis revealed an enhanced presence and adhesion of HaCat cells on the anodized surface for the implant collars and an increased adhesion of BM-MSCs on both the anodized and machined surface abutments. The topography characteristics of the treated implants and abutments varied depending on the specific implant region. Chemical analysis confirmed the presence of oxygen, calcium, phosphorus, and sodium on the anodized surfaces. The area-specific anodization process can be utilized to create variable topography, increase the specific surface area, and introduce oxygen, calcium, phosphorus, and sodium to dental implants and abutments. While BM-MSCs and HaCat cells showed similar adhesion and proliferation on anodized and machined surfaces, a positive interaction between anodized Ti6Al4V ELI surfaces and these two cell lines present in the peri-implant mucosa was observed. Due to the limitations of the present study, further research is necessary to confirm these findings.
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Affiliation(s)
- Valeria Traver-Méndez
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
| | - Octavi Camps-Font
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
| | - Francesc Ventura
- Department of Physiological Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Miquel Angel Nicolau-Sansó
- Adult Comprehensive Dentistry, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Carles Subirà-Pifarré
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
- Adult Comprehensive Dentistry, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Rui Figueiredo
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
| | - Eduard Valmaseda-Castellón
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
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Velasco-Ortega E, Fos-Parra I, Cabanillas-Balsera D, Gil J, Ortiz-García I, Giner M, Bocio-Núñez J, Montoya-García MJ, Jiménez-Guerra Á. Osteoblastic Cell Behavior and Gene Expression Related to Bone Metabolism on Different Titanium Surfaces. Int J Mol Sci 2023; 24:ijms24043523. [PMID: 36834936 PMCID: PMC9967211 DOI: 10.3390/ijms24043523] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/05/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The surface topography of titanium dental implants has a great influence on osseointegration. In this work, we try to determine the osteoblastic behavior and gene expression of cells with different titanium surfaces and relate them to the physicochemical properties of the surface. For this purpose, we have used commercial titanium discs of grade 3: as-received corresponds to machined titanium without any surface treatment (MA), chemically acid etched (AE), treated via sand blasting with Al2O3 particles (SB) and a sand-blasting treatment with acid etching (SB+AE). The surfaces have been observed using scanning electron microscopy (SEM) and the roughness, wettability and surface energy with dispersive and polar components have been characterized. Osteoblastic cultures were performed with SaOS-2 osteoblastic cells determining cell viability as well as alkaline phosphatase levels for 3 and 21 days, and osteoblastic gene expression was determined. The roughness values of the MA discs was 0.02 μm, which increases to 0.3 μm with acid attack and becomes the maximum for the sand-blasted samples, reaching values of 1.2 μm for SB and SB+AE. The hydrophilic behavior of the MA and AE samples with contact angles of 63° and 65° is superior to that of the rougher samples, being 75° for SB and 82° for SB+AE. In all cases, they show good hydrophilicity. GB and GB+AE surfaces present a higher polar component in the surface energy values, 11.96 and 13.18 mJ/m2, respectively, than AE and MA, 6.64 and 9.79 mJ/m2, respectively. The osteoblastic cell viability values at three days do not show statistically significant differences between the four surfaces. However, the viability of the SB and SB+AE surfaces at 21 days is much higher than that of the AE and MA samples. From the alkaline phosphatase studies, higher values were observed for those treated with sand blasting with and without acid etching compared to the other two surfaces, indicating a greater activity in osteoblastic differentiation. In all cases except in the Osterix (Ostx) -osteoblast-specific transcription factor-a decrease in gene expression is observed in relation to the MA samples (control). The most important increase was observed for the SB+AE condition. A decrease in the gene expression of Osteoprotegerine (OPG), Runt-related transcription factor 2 (Runx2), Receptor Activator of NF-κB Ligand (RANKL) and Alkaline Phosphatase (Alp) genes was observed in the AE surface.
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Affiliation(s)
- Eugenio Velasco-Ortega
- Faculty of Dentistry, University of Seville, c/Avicena s/n, 41009 Sevilla, Spain lomonsalve Hotmail.es
| | - Isabel Fos-Parra
- Faculty of Dentistry, University of Seville, c/Avicena s/n, 41009 Sevilla, Spain lomonsalve Hotmail.es
| | - Daniel Cabanillas-Balsera
- Faculty of Dentistry, University of Seville, c/Avicena s/n, 41009 Sevilla, Spain lomonsalve Hotmail.es
| | - Javier Gil
- Bioengineering Institute of Technology, Universitat Internacional de Catalunya, 08195 Sant Cugat del Vallés, Spain
- Correspondence:
| | - Iván Ortiz-García
- Faculty of Dentistry, University of Seville, c/Avicena s/n, 41009 Sevilla, Spain lomonsalve Hotmail.es
| | - Mercè Giner
- Departamento de Citología e Histología Normal y Patológica, Universidad de Sevilla, 41009 Sevilla, Spain
| | - Jesús Bocio-Núñez
- Bone Metabolism Unit, UGC Medicina Interna, Hospital Universitario Virgen Macarena, Avda. Dr. Fedriani s/n, 41009 Sevilla, Spain
| | | | - Álvaro Jiménez-Guerra
- Faculty of Dentistry, University of Seville, c/Avicena s/n, 41009 Sevilla, Spain lomonsalve Hotmail.es
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Effects of Different Titanium Surface Treatments on Adhesion, Proliferation and Differentiation of Bone Cells: An In Vitro Study. J Funct Biomater 2022; 13:jfb13030143. [PMID: 36135578 PMCID: PMC9503392 DOI: 10.3390/jfb13030143] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/17/2022] Open
Abstract
The objective of this study was to evaluate the impacts of different sandblasting procedures in acid etching of Ti6Al4V surfaces on osteoblast cell behavior, regarding various physicochemical and topographical parameters. Furthermore, differences in osteoblast cell behavior between cpTi and Ti6Al4V SA surfaces were evaluated. Sandblasting and subsequent acid etching of cpTi and Ti6Al4V discs was performed with Al2O3 grains of different sizes and with varying blasting pressures. The micro- and nano-roughness of the experimental SA surfaces were analyzed via confocal, atomic force and scanning electron microscopy. Surface free energy and friction coefficients were determined. hFOB 1.19 cells were seeded to evaluate adhesion, proliferation and osteoblastic differentiation for up to 12 d via crystal violet assays, MTT assays, ALP activity assays and Alizarin Red staining assays. Differences in blasting procedures had significant impacts on surface macro- and micro-topography. The crystal violet assay revealed a significant inverse relationship between blasting grain size and hFOB cell growth after 7 days. This trend was also visible in the Alizarin Red assays staining after 12 d: there was significantly higher biomineralization visible in the group that was sandblasted with smaller grains (F180) when compared to standard-grain-size groups (F70). SA samples treated with reduced blasting pressure exhibited lower hFOB adhesion and growth capabilities at initial (2 h) and later time points for up to 7 days, when compared to the standard SA surface, even though micro-roughness and other relevant surface parameters were similar. Overall, etched-only surfaces consistently exhibited equivalent or higher adhesion, proliferation and differentiation capabilities when compared to all other sandblasted and etched surfaces. No differences were found between cpTi and Ti6Al4V SA surfaces. Subtle modifications in the blasting protocol for Ti6Al4V SA surfaces significantly affect the proliferative and differentiation behavior of human osteoblasts. Surface roughness parameters are not sufficient to predict osteoblast behavior on etched Ti6Al4V surfaces.
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6
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Contemporary Concepts in Osseointegration of Dental Implants: A Review. BIOMED RESEARCH INTERNATIONAL 2022; 2022:6170452. [PMID: 35747499 PMCID: PMC9213185 DOI: 10.1155/2022/6170452] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/26/2022] [Indexed: 11/18/2022]
Abstract
In a society highly conscious of esthetics, prosthetic rehabilitation of lost teeth with tissue-integrated implants has gained wide acceptance and demand by patients and clinicians. The backbone of these tissue-integrated implants is the biotechnical process of osseointegration. Although the concept has been introduced and discussed for ages, the deepening knowledge about its cellular and molecular mechanisms has led the researchers to borrow further into the factors influencing the process of osseointegration. This has aided in the hastening and improving the process of osseointegration by exploiting several, even the minutest, details and events taking place in this natural process. Recently, due to the high esthetic expectations of the patients, the implants are being loaded immediately, which demands a high degree of implant stability. Implant stability, especially secondary stability, largely depends on bone formation and integration of implants to the osseous tissues. Various factors that influence the rate and success of osseointegration can either be categorized as those related to implant characteristics like the physical and chemical macro- and microdesign of implants or the bone characteristics like the amount and quality of bone and the local and systemic host conditions, or the time or protocol followed for the functional loading of the dental implant. To address the shortcomings in osseointegration due to any of the factors, it is mandatory that continuous and reliable monitoring of the status of osseointegration is done. This review attempts to encompass the mechanisms, factors affecting, and methods to assess osseointegration, followed by a discussion on the recent advances and future perspectives in dental implantology to enhance the process of osseointegration. The review was aimed at igniting the inquisitive minds to usher further the development of technology that enhances osseointegration.
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Lafuente-Merchan M, Ruiz-Alonso S, Zabala A, Gálvez-Martín P, Marchal JA, Vázquez-Lasa B, Gallego I, Saenz-Del-Burgo L, Pedraz JL. Chondroitin and Dermatan Sulfate Bioinks for 3D Bioprinting and Cartilage Regeneration. Macromol Biosci 2022; 22:e2100435. [PMID: 35029035 DOI: 10.1002/mabi.202100435] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/28/2021] [Indexed: 11/11/2022]
Abstract
Cartilage is a connective tissue which a limited capacity for healing and repairing. In this context, osteoarthritis disease may be developed with high prevalence in which the use of scaffolds may be a promising treatment. In addition, three-dimensional (3D) bioprinting has become an emerging additive manufacturing technology because of its rapid prototyping capacity and the possibility of creating complex structures. This study was focused on the development of nanocellulose-alginate (NC-Alg) based bioinks for 3D bioprinting for cartilage regeneration to which it was added chondroitin sulfate (CS) and dermatan sulfate (DS). First, rheological properties were evaluated. Then, sterilisation effect, biocompatibility and printability on developed NC-Alg-CS and NC-Alg-DS inks were evaluated. Subsequently, printed scaffolds were characterized. Finally, NC-Alg-CS and NC-Alg-DS inks were loaded with murine D1-MSCs-EPO and cell viability and functionality, as well as the chondrogenic differentiation ability were assessed. Results showed that the addition of both CS and DS to the NC-Alg ink improved its characteristics in terms of rheology and cell viability and functionality. Moreover, differentiation to cartilage was promoted on NC-Alg-CS and NC-Alg-DS scaffolds. Therefore, the utilization of MSCs containing NC-Alg-CS and NC-Alg-DS scaffolds may become a feasible tissue engineering approach for cartilage regeneration. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Markel Lafuente-Merchan
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Bioaraba Health Research Institute, Jose Atxotegi, s/n, Vitoria-Gasteiz, 01009, Spain
| | - Sandra Ruiz-Alonso
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Bioaraba Health Research Institute, Jose Atxotegi, s/n, Vitoria-Gasteiz, 01009, Spain
| | - Alaitz Zabala
- Mechanical and Industrial Manufacturing Department, Mondragon Unibertsitatea, Loramendi 4, Mondragón, 20500, Spain
| | | | - Juan Antonio Marchal
- Biopathology and Regenerative Medicine Institute (IBIMER), Centre for Biomedical Research, University of Granada, Granada, 18100, Spain.,Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Andalusian Health Service (SAS), University of Granada, Granada, Spain.,Department of Human Anatomy and Embryology, Faculty of Medicine, University of Granada, Granada, 18016, Spain.,BioFab i3D Lab - Biofabrication and 3D (bio)printing singular Laboratory, University of Granada, Granada, 18100, Spain
| | - Blanca Vázquez-Lasa
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, Madrid, 28006, Spain
| | - Idoia Gallego
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Bioaraba Health Research Institute, Jose Atxotegi, s/n, Vitoria-Gasteiz, 01009, Spain
| | - Laura Saenz-Del-Burgo
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Bioaraba Health Research Institute, Jose Atxotegi, s/n, Vitoria-Gasteiz, 01009, Spain
| | - Jose Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.,Bioaraba Health Research Institute, Jose Atxotegi, s/n, Vitoria-Gasteiz, 01009, Spain
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8
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Jurak M, Wiącek AE, Ładniak A, Przykaza K, Szafran K. What affects the biocompatibility of polymers? Adv Colloid Interface Sci 2021; 294:102451. [PMID: 34098385 DOI: 10.1016/j.cis.2021.102451] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 02/07/2023]
Abstract
In recent decades synthetic polymers have gained increasing popularity, and nowadays they are an integral part of people's daily lives. In addition, owing to their competitive advantage and being susceptible to modification, polymers have stimulated the fast development of innovative technologies in many areas of science. Biopolymers are of particular interest in various branches of medicine, such as implantology of bones, cartilage and skin tissues as well as blood vessels. Biomaterials with such specific applications must have appropriate mechanical and strength characteristics and above all they must be compatible with the surrounding tissues, human blood and its components, i.e. exhibit high hemo- and biocompatibility, low or no thrombo- and carcinogenicity, foreign body response (host response), appropriate osteoconduction, osteoinduction and mineralization. For biocompatibility improvement many surface treatment techniques have been utilized leading to fabricate the polymer biomaterials of required properties, also at nanoscale. This review paper discusses the most important physicochemical and biological factors that affect the biocompatibility, thus the reaction of the living organism after insertion of the polymer-based biomaterials, i.e. surface modification and/or degradation, surface composition (functional groups and charge), size and shapes, hydrophilic-hydrophobic character, wettability and surface free energy, topography (roughness, stiffness), crystalline and amorphous structure, nanostructure, cell adhesion and proliferation, cellular uptake. Particularly, the application of polysaccharides (chitosan, cellulose, starch) in the tissue engineering is emphasized.
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9
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Romanos GE, Fischer GA, Delgado-Ruiz R. Titanium Wear of Dental Implants from Placement, under Loading and Maintenance Protocols. Int J Mol Sci 2021; 22:1067. [PMID: 33494539 PMCID: PMC7865642 DOI: 10.3390/ijms22031067] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/05/2021] [Accepted: 01/19/2021] [Indexed: 12/13/2022] Open
Abstract
The objective of this review was to analyze the process of wear of implants leading to the shedding of titanium particles into the peri-implant hard and soft tissues. Titanium is considered highly biocompatible with low corrosion and toxicity, but recent studies indicate that this understanding may be misleading as the properties of the material change drastically when titanium nanoparticles (NPs) are shed from implant surfaces. These NPs are immunogenic and are associated with a macrophage-mediated inflammatory response by the host. The literature discussed in this review indicates that titanium NPs may be shed from implant surfaces at the time of implant placement, under loading conditions, and during implant maintenance procedures. We also discuss the significance of the micro-gap at the implant-abutment interface and the effect of size of the titanium particles on their toxicology. These findings are significant as the titanium particles can have adverse effects on local soft and hard tissues surrounding implants, implant health and prognosis, and even the health of systemic tissues and organs.
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Affiliation(s)
- Georgios E. Romanos
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, 106 Rockland Hall, Stony Brook, NY 11794-8700, USA;
- Department of Oral Surgery and Implant Dentistry, School of Dentistry, Johann Wolfgang Goethe University, 60590 Frankfurt, Germany
| | - Gerard A. Fischer
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, 106 Rockland Hall, Stony Brook, NY 11794-8700, USA;
| | - Rafael Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, NY 11794-8700, USA;
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Keceli HG, Bayram C, Celik E, Ercan N, Demirbilek M, Nohutcu RM. Dual delivery of platelet-derived growth factor and bone morphogenetic factor-6 on titanium surface to enhance the early period of implant osseointegration. J Periodontal Res 2020; 55:694-704. [PMID: 32776328 DOI: 10.1111/jre.12756] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 04/01/2020] [Accepted: 04/06/2020] [Indexed: 01/12/2023]
Abstract
OBJECTIVE To test the surface properties and in vitro effects of a new sequential release system on MC3T3-E1 cells for improved osseointegration. BACKGROUND BMP6-loaded anodized titanium coated with PDGF containing silk fibroin (SF) may improve osseointegration. METHODS Titanium surfaces were electrochemically anodized, and SF layer was covered via electrospinning. Five experimental groups (unanodized Ti (Ti), anodized Ti (AnTi), anodized + BMP6-loaded Ti (AnTi-BMP6), anodized + BMP6 loaded + silk fibroin-coated Ti (AnTi-BMP6-SF), and anodized + BMP6-loaded + silk fibroin with PDGF-coated Ti (AnTi-BMP6-PDGF-SF)) were tested. After SEM characterization, contact angle analysis, and FTIR analysis, the amount of released PDGF and BMP6 was detected using ELISA. Cell proliferation (XTT), mineralization, and gene expression (RUNX2 and ALPL) were also evaluated. RESULTS After successful anodization and loading of PDGF and BMP6, contact angle measurements showed hydrophobicity for TiO2 and hydrophilicity for protein-adsorbed surfaces. In FTIR, protein-containing surfaces exhibited amide-I, amide-II, and amide-III bands at 1600 cm-1 -1700 cm-1 , 1520 cm-1 -1540 cm-1 , and 1220 cm-1 -1300 cm-1 spectrum levels with a significant peak in BMP6- and/or SF-loaded groups at 1100 cm-1 . PDGF release and BMP6 release were delayed, and relatively slower release was detected in SF-coated surfaces. Higher MC3T3-E1 proliferation and mineralization and lower gene expression of RUNX2 and ALPL were detected in AnTi-BMP6-PDGF-SF toward day 28. CONCLUSION The new system revealed a high potential for an improved early osseointegration period by means of a better factor release curve and contribution to the osteoblastic cell proliferation, mineralization, and associated gene expression.
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Affiliation(s)
- H Gencay Keceli
- Periodontology Department, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Cem Bayram
- Department of Nanotechnology and Nanomedicine, Institute of Science and Technology, Hacettepe University, Ankara, Turkey
| | - Ekin Celik
- Medical Biology Department, Faculty of Medicine, Kirsehir Ahi Evran University, Kirsehir, Turkey
| | - Nuray Ercan
- Periodontology Department, Faculty of Dentistry, Kirikkale University, Kirikkale, Turkey
| | - Murat Demirbilek
- Advanced Technologies Application and Research Center, Hacettepe University, Ankara, Turkey
| | - Rahime Meral Nohutcu
- Periodontology Department, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Komasa S, Takao S, Yang Y, Zeng Y, Li M, Yan S, Zhang H, Komasa C, Kobayashi Y, Nishizaki H, Nishida H, Kusumoto T, Okazaki J. Effects of UV Treatment on Ceria-Stabilized Zirconia/Alumina Nanocomposite (NANOZR). MATERIALS 2020; 13:ma13122772. [PMID: 32570895 PMCID: PMC7345710 DOI: 10.3390/ma13122772] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/08/2020] [Accepted: 06/15/2020] [Indexed: 12/12/2022]
Abstract
Nanostructured zirconia/alumina composite (NANOZR) has been explored as a suitable material for fabricating implants for patients with metal allergy. In this study, we examined the effect of UV treatment on the NANOZR surface. The experimental group was UV-treated NANOZR and the control group was untreated NANOZR. Observation of the surface of the UV-treated materials revealed no mechanical or structural change; however, the carbon content on the material surface was reduced, and the material surface displayed superhydrophilicity. Further, the effects of the UV-induced superhydrophilic properties of NANOZR plates on the adhesion behavior of various cells were investigated. Treatment of the NANOZR surface was found to facilitate protein adsorption onto it. An in vitro evaluation using rat bone marrow cells, human vascular endothelial cells, and rat periodontal ligament cells revealed high levels of adhesion in the experimental group. In addition, it was clarified that the NANOZR surface forms active oxygen and suppresses the generation of oxidative stress. Overall, the study results suggested that UV-treated NANOZR is useful as a new ceramic implant material.
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Affiliation(s)
- Satoshi Komasa
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Seiji Takao
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Yuanyuan Yang
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Yuhao Zeng
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Min Li
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Sifan Yan
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Honghao Zhang
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Chisato Komasa
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
| | - Yasuyuki Kobayashi
- Osaka Research Institute of Industrial Science and Technology, Morinomiya Center, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan;
| | - Hiroshi Nishizaki
- Department of Japan, Faculty of Health Sciences, Osaka Dental University, 1-4-4, Makino-honmachi, Hirakata-shi, Osaka 573-1121, Japan; (H.N.); (T.K.)
| | - Hisataka Nishida
- Department of Advanced Hard Materials, The Institute of Scientific and Industrial Research (ISIR), Osaka University, Osaka 567-0047, Japan;
| | - Tetsuji Kusumoto
- Department of Japan, Faculty of Health Sciences, Osaka Dental University, 1-4-4, Makino-honmachi, Hirakata-shi, Osaka 573-1121, Japan; (H.N.); (T.K.)
| | - Joji Okazaki
- Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 8-1 Kuzuha-hanazono-cho, Hirakata, Osaka 573-1121, Japan; (S.K.); (S.T.); (Y.Y.); (Y.Z.); (M.L.); (S.Y.); (H.Z.); (C.K.)
- Correspondence: ; Tel.: +81-72-864-3084; Fax: +81-72-864-3184
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Das S, Dholam K, Gurav S, Bendale K, Ingle A, Mohanty B, Chaudhari P, Bellare JR. Accentuated osseointegration in osteogenic nanofibrous coated titanium implants. Sci Rep 2019; 9:17638. [PMID: 31819073 PMCID: PMC6901521 DOI: 10.1038/s41598-019-53884-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 10/29/2019] [Indexed: 12/24/2022] Open
Abstract
Anchoring of endosseous implant through osseointegration continues to be an important clinical need. Here, we describe the development of superior endosseous implant demonstrating enhance osseointegration, achieved through surface modification via coating of osteogenic nanofibres. The randomized bio-composite osteogenic nanofibres incorporating polycaprolactone, gelatin, hydroxyapatite, dexamethasone, beta-glycerophosphate and ascorbic acid were electrospun on titanium implants mimicking bone extracellular matrix and subsequently induced osteogenesis by targeting undifferentiated mesenchymal stem cells present in the peri-implant niche to regenerate osseous tissue. In proof-of-concept experiment on rabbit study models (n = 6), micro-computed tomography (Micro-CT), histomorphometric analysis and biomechanical testing in relation to our novel osteogenic nanofibrous coated implants showed improved results when compared to uncoated controls. Further, no pathological changes were detected during gross examination and necropsy on peri-implant osseous tissues regenerated in response to such coated implants. The findings of the present study confirm that osteogenic nanofibrous coating significantly increases the magnitude of osteogenesis in the peri-implant zone and favours the dynamics of osseointegration.
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Affiliation(s)
- Siddhartha Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India
| | - Kanchan Dholam
- Department of Dental and Prosthetic Surgery, Tata Memorial Centre, HBNI, Mumbai, 400 012, Maharashtra, India
| | - Sandeep Gurav
- Department of Dental and Prosthetic Surgery, Tata Memorial Centre, HBNI, Mumbai, 400 012, Maharashtra, India
| | - Kiran Bendale
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410 210, Maharashtra, India
| | - Arvind Ingle
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410 210, Maharashtra, India
| | - Bhabani Mohanty
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410 210, Maharashtra, India
| | - Pradip Chaudhari
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410 210, Maharashtra, India
| | - Jayesh R Bellare
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India.
- Wadhwani Research Centre for Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, Maharashtra, India.
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3D inkjet printing of biomaterials with strength reliability and cytocompatibility: Quantitative process strategy for Ti-6Al-4V. Biomaterials 2019; 213:119212. [DOI: 10.1016/j.biomaterials.2019.05.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/10/2019] [Indexed: 02/01/2023]
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Sasikumar Y, Indira K, Rajendran N. Surface Modification Methods for Titanium and Its Alloys and Their Corrosion Behavior in Biological Environment: A Review. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40735-019-0229-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Günay-Bulutsuz A, Berrak Ö, Yeprem HA, Arisan ED, Yurci ME. Biological responses of ultrafine grained pure titanium and their sand blasted surfaces. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:382-388. [DOI: 10.1016/j.msec.2018.05.056] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 04/10/2018] [Accepted: 05/16/2018] [Indexed: 01/08/2023]
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Bergholt NL, Foss M, Saeed A, Gadegaard N, Lysdahl H, Lind M, Foldager CB. Surface chemistry, substrate, and topography guide the behavior of human articular chondrocytes cultured in vitro. J Biomed Mater Res A 2018; 106:2805-2816. [PMID: 29907992 DOI: 10.1002/jbm.a.36467] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/22/2018] [Accepted: 05/22/2018] [Indexed: 01/18/2023]
Abstract
Understanding the behavior of chondrocytes in contact with artificial culture surfaces is becoming increasingly important in attaining appropriate ex vivo culture conditions of chondrocytes in cartilage regeneration. Chondrocyte transplantation-based cartilage repair requires efficiently expanded chondrocytes, and the culture surface plays an important role in guiding the behavior of the cell. Micro- and nano-engineered surfaces make it possible to modulate cell behavior. We hypothesized that the combined influence of topography, substrate, and surface chemistry may affect the chondrocyte culturing in terms of proliferation and phenotypic means. Human chondrocytes were cultured on polystyrene fabricated microstructures, flat polydimethylsiloxane (PDMS), or polystyrene treated with fibronectin or oxygen plasma and cultured for 1, 4, 7, and 10 days. The behavior of chondrocytes was evaluated by proliferation, viability, chondrogenic gene expression, and cell morphology. Contrary to our hypothesis, microstructures in polystyrene did not significantly influence the behavior of chondrocytes neither under normoxic- nor hypoxic conditions. However, changes in the substrate stiffness and surface chemistry were found to influence cell viability, gene expression, and morphology of human chondrocytes. Oxygen plasma treatment was the most important parameter followed by the softer substrate type PDMS. The findings indicate the culture of human chondrocytes on softer substratum and surface activation by oxygen plasma may prevent dedifferentiation and may improve chondrocyte transplantation-based cartilage repair. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2805-2816, 2018.
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Affiliation(s)
| | - Morten Foss
- Interdisciplinary Nanoscience Center, iNANO, University Aarhus, Aarhus, Denmark
| | - Anwer Saeed
- Division of Biomedical Engineering, University of Glasgow, Glasgow, G12 8LT, United Kingdom
| | - Nikolaj Gadegaard
- Division of Biomedical Engineering, University of Glasgow, Glasgow, G12 8LT, United Kingdom
| | - Helle Lysdahl
- Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Martin Lind
- Sports Trauma Clinic, Aarhus University Hospital, Aarhus, Denmark
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Liang C, Wen J, Liao X. A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO 2 nanotubes with a hydrophobic layer. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1793-1801. [PMID: 29977712 PMCID: PMC6009292 DOI: 10.3762/bjnano.9.170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 05/24/2018] [Indexed: 05/28/2023]
Abstract
In this work, a visible-light-controlled drug release platform was constructed for localized and prolonged drug release based on two-layer titania nanotubes (TNTs) fabricated using by an in situ voltage up-anodization process. The visible-light photocatalytic activity is improved by loading Ag onto the TNTs by NaBH4 reduction. Then, the TNTs containing Ag nanoparticles were modified with dodecanethiol (NDM) to create a hydrophobic layer. To demonstrate the visible-light-controlled drug release, the Zn2+ release behavior of the samples was investigated. In the initial 12 h, TNTs without NDM displayed a faster release rate with 29.4% Zn2+ release, which was more than three times that of the TNTs with NDM (8.7% Zn2+ release). Upon visible-light illumination, drug release from the sample coated with NDM was shown to increase due to the photocatalytic decomposition of NDM. The amount of released Zn2+ for this sample increased up to 71.9% within 12 h, indicating visible-light-controlled drug release. This drug release system may exhibit promising application as a localized, prolonged drug delivery platform.
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Affiliation(s)
- Caihong Liang
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jiang Wen
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xiaoming Liao
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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Leesungbok R, Seo JH, Cho SA. Clinical outcome of immediately and early loaded implants with laser treated surface: a 3-year retrospective study. J Adv Prosthodont 2018; 10:163-166. [PMID: 29713438 PMCID: PMC5917109 DOI: 10.4047/jap.2018.10.2.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 03/29/2018] [Accepted: 04/16/2018] [Indexed: 11/23/2022] Open
Abstract
PURPOSE The marginal bone loss of implants with laser treated surface was investigated after six weeks of loading after implant installation to the mandible molar area. MATERIALS AND METHODS A total of 23 implants were placed in the edentulous molar area of the mandible: 13 implants were immediately loaded and 10 implants were early loaded. The implants used were made of titanium grade 23, screw shaped, 4.2 mm in diameter, and 10 mm in length. Patients were evaluated with resonance frequency analysis at implant fixture installation and 1, 2 (final prosthesis installation), 3, 5, 8, and 14 months later. X-rays were taken at 2 months after fixture installation and 1, 2, 3 years after to measure the marginal bone loss. RESULTS The mean ISQ value measured at the implant installation was over 70 at all-time points. The average of marginal bone loss was average 0.33 mm. CONCLUSION Immediate implant loading for laser treated implants would be possible.
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Affiliation(s)
- Richard Leesungbok
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Jin-Ho Seo
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Sung-Am Cho
- Department of Prosthodontics, School of Dentistry, Kyung-Pook National University, Daegu, Republic of Korea
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Bone Response to Two Dental Implants with Different Sandblasted/Acid-Etched Implant Surfaces: A Histological and Histomorphometrical Study in Rabbits. BIOMED RESEARCH INTERNATIONAL 2017; 2017:8724951. [PMID: 29445746 PMCID: PMC5763083 DOI: 10.1155/2017/8724951] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 11/23/2017] [Accepted: 12/05/2017] [Indexed: 01/24/2023]
Abstract
Background Scientific evidence in the field of implant dentistry of the past 20 years established that titanium rough surfaces have shown improved osseointegration rates. In a majority of dental implants, the surface microroughness was obtained by grit blasting and/or acid etching. The aim of the study was to evaluate in vivo two different highly hydrophilic surfaces at different experimental times. Methods Calcium-modified (CA) and SLActive surfaces were evaluated and a total of 18 implants for each type of surface were positioned into the rabbit articular femoral knee-joint in a split model experiment, and they were evaluated histologically and histomorphometrically at 15, 30, and 60 days of healing. Results Bone-implant contact (BIC) at the two-implant surfaces was significantly different in favor of the CA surface at 15 days (p = 0.027), while SLActive displayed not significantly higher values at 30 (p = 0.51) and 60 days (p = 0.061). Conclusion Both implant surfaces show an intimate interaction with newly formed bone.
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Huang L, Tian M, Wu D, Duscher G, Liaw PK, He W. Surface Mechanoengineering of a Zr-Based Bulk Metallic Glass via Ar-Nanobubble Doping To Probe Cell Sensitivity to Rigid Materials. ACS APPLIED MATERIALS & INTERFACES 2017; 9:43429-43437. [PMID: 29171273 DOI: 10.1021/acsami.7b12663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, a new materials platform, utilizing the amorphous microstructure of bulk metallic glasses (BMGs) and the versatility of ion implantation, was developed for the fundamental investigation of cell responses to substrate-rigidity variations in the gigapascal modulus range, which was previously unattainable with polymeric materials. The surface rigidity of a Zr-Al-Ni-Cu-Y BMG was modulated with low-energy Ar-ion implantation because of the impartment of Ar nanobubbles into the amorphous matrix. Surface softening was achieved due to the formation of nanobubble-doped transitional zones in the Zr-based BMG substrate. Bone-forming cell studies on this newly designed platform demonstrated that mechanical cues, accompanied by the potential effects of other surface properties (i.e., roughness, morphology, and chemistry), contributed to modulating cell behaviors. Cell adhesion and actin filaments were found to be less established on less stiff surfaces, especially on the surface with an elastic modulus of 51 GPa. Cell growth appeared to be affected by surface-mechanical properties. A lower stiffness was generally related to a higher growth rate. Findings in this study broadened our fundamental understanding concerning the mechanosensing of bone cells on stiff substrates. It also suggests that surface mechanoengineering of metallic materials could be a potential strategy to promote osseointegration of such materials for bone-implant applications. Further investigations are proposed to fine-tune the ion implantation variables in order to further distinguish the surface-mechanical effect on bone-forming cell activities from the contributions of other surface properties.
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Affiliation(s)
- Lu Huang
- Department of Materials Science and Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Mengkun Tian
- Department of Chemical and Biomaterials Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Dong Wu
- Department of Materials Science and Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Gerd Duscher
- Department of Materials Science and Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
- Materials Science and Technology Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Peter K Liaw
- Department of Materials Science and Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Wei He
- Department of Materials Science and Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
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Ai C, Sheng D, Chen J, Cai J, Wang S, Jiang J, Chen S. Surface modification of vascular endothelial growth factor-loaded silk fibroin to improve biological performance of ultra-high-molecular-weight polyethylene via promoting angiogenesis. Int J Nanomedicine 2017; 12:7737-7750. [PMID: 29118579 PMCID: PMC5659221 DOI: 10.2147/ijn.s148845] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Ultra-high-molecular-weight polyethylene (UHMWPE) has been applied in orthopedics, as the materials of joint prosthesis, artificial ligaments, and sutures due to its advantages such as high tensile strength, good wear resistance, and chemical stability. However, postoperative osteolysis induced by UHMWPE wear particles and poor bone–implant healing interface due to scarcity of osseointegration is a significant problem and should be solved imperatively. In order to enhance its affinity to bone tissue, vascular endothelial growth factor (VEGF) was loaded on the surface of materials, the loading was performed by silk fibroin (SF) coating to achieve a controlled-release delivery. Several techniques including field emission scanning electron microscopy (FESEM) and attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) and water contact angle measurement were used to validate the effectiveness of introduction of SF/VEGF. The result of ELISA demonstrated that the release of VEGF was well maintained up to 4 weeks. The modified UHMWPE was evaluated by both in vitro and in vivo experiments. According to the results of FESEM and cell counting kit-8 (CCK-8) assay, bone marrow mesenchymal stem cells cultured on the UHMWPE coated with SF/VEGF and SF exhibited a better proliferation performance than that of the pristine UHMWPE. The model rabbit of anterior cruciate ligament reconstruction was used to observe the graft–bone healing process in vivo. The results of histological evaluation, microcomputed tomography (micro-CT) analysis, and biomechanical tests performed at 6 and 12 weeks after surgery demonstrated that graft–bone healing could be significantly improved due to the effect of VEGF on angiogenesis, which was loaded on the surface by SF coating. This study showed that the method loading VEGF on UHMWPE by SF coating played an effective role on the biological performance of UHMWPE and displayed a great potential application for anterior cruciate ligament reconstruction.
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Affiliation(s)
- Chengchong Ai
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Dandan Sheng
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jun Chen
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jiangyu Cai
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Siheng Wang
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jia Jiang
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Shiyi Chen
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
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Surface characteristics of bioactive Ti fabricated by chemical treatment for cartilaginous-integration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:495-502. [DOI: 10.1016/j.msec.2017.03.250] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/23/2017] [Accepted: 03/26/2017] [Indexed: 12/23/2022]
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Eger M, Sterer N, Liron T, Kohavi D, Gabet Y. Scaling of titanium implants entrains inflammation-induced osteolysis. Sci Rep 2017; 7:39612. [PMID: 28059080 PMCID: PMC5216395 DOI: 10.1038/srep39612] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 11/24/2016] [Indexed: 12/26/2022] Open
Abstract
With millions of new dental and orthopedic implants inserted annually, periprosthetic osteolysis becomes a major concern. In dentistry, peri-implantitis management includes cleaning using ultrasonic scaling. We examined whether ultrasonic scaling releases titanium particles and induces inflammation and osteolysis. Titanium discs with machined, sandblasted/acid-etched and sandblasted surfaces were subjected to ultrasonic scaling and we physically and chemically characterized the released particles. These particles induced a severe inflammatory response in macrophages and stimulated osteoclastogenesis. The number of released particles and their chemical composition and nanotopography had a significant effect on the inflammatory response. Sandblasted surfaces released the highest number of particles with the greatest nanoroughness properties. Particles from sandblasted/acid-etched discs induced a milder inflammatory response than those from sandblasted discs but a stronger inflammatory response than those from machined discs. Titanium particles were then embedded in fibrin membranes placed on mouse calvariae for 5 weeks. Using micro-CT, we observed that particles from sandblasted discs induced more osteolysis than those from sandblasted/acid-etched discs. In summary, ultrasonic scaling of titanium implants releases particles in a surface type-dependent manner and may aggravate peri-implantitis. Future studies should assess whether surface roughening affects the extent of released wear particles and aseptic loosening of orthopedic implants.
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Affiliation(s)
- Michal Eger
- Department of Anatomy &Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Nir Sterer
- Department of Prosthodontics, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Tamar Liron
- Department of Anatomy &Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - David Kohavi
- Department of Prosthodontics, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Yankel Gabet
- Department of Anatomy &Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Israel
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Ai C, Cai J, Zhu J, Zhou J, Jiang J, Chen S. Effect of PET graft coated with silk fibroin via EDC/NHS crosslink on graft-bone healing in ACL reconstruction. RSC Adv 2017. [DOI: 10.1039/c7ra08636a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
SF coating via EDC/NHS crosslink improved the osseointegration of PET ligaments within the bone tunnel.
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Affiliation(s)
- Chengchong Ai
- Department of Sports Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | - Jiangyu Cai
- Department of Sports Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | - Jun Zhu
- National Engineering Research Center for Nanotechnology
- Shanghai 200241
- China
| | - Juan Zhou
- National Engineering Research Center for Nanotechnology
- Shanghai 200241
- China
| | - Jia Jiang
- Department of Sports Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
| | - Shiyi Chen
- Department of Sports Medicine
- Huashan Hospital
- Fudan University
- Shanghai 200040
- China
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Tran PA, Fox K, Tran N. Novel hierarchical tantalum oxide-PDMS hybrid coating for medical implants: One pot synthesis, characterization and modulation of fibroblast proliferation. J Colloid Interface Sci 2017; 485:106-115. [PMID: 27662021 DOI: 10.1016/j.jcis.2016.06.048] [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: 04/14/2016] [Revised: 06/20/2016] [Accepted: 06/20/2016] [Indexed: 10/25/2022]
Abstract
Surface properties such as morphology, roughness and charge density have a strong influence on the interaction of biomaterials and cells. Hierarchical materials with a combination of micron/submicron and nanoscale features for coating of medical implants could therefore have significant potential to modulate cellular responses and eventually improve the performance of the implants. In this study, we report a simple, one pot wet chemistry preparation of a hybrid coating system with hierarchical surface structures consisting of polydimethylsiloxane (PDMS) and tantalum oxide. Medical grade, amine functional PDMS was mixed with tantalum ethoxide which subsequently formed Ta2O5in situ through hydrolysis and condensation during coating process. The coatings were characterized by SEM, EDS, XPS, confocal scanning microscopy, contact angle measurement and in vitro cell culture. Varying PDMS and tantalum ethoxide ratios resulted in coatings of different surface textures ranging from smooth to submicro- and nano-structured. Strikingly, hierarchical surfaces containing both microscale (1-1.5μm) and nanoscale (86-163nm) particles were found on coatings synthesized with 20% and 40% (v/v) tantalum ethoxide. The coatings were similar in term of hydrophobicity but showed different surface roughness and chemical composition. Importantly, higher cell proliferation was observed on hybrid surface with hierarchical structures compared to pure PDMS or pure tantalum oxide. The coating process is simple, versatile, carried out under ambient condition and requires no special equipment.
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Affiliation(s)
- Phong A Tran
- Queensland University of Technology (QUT), Australia; Department of Chemical and Biomolecular Engineering, The Particulate Fluid Processing Centre, The University of Melbourne, Victoria 3010, Australia.
| | - Kate Fox
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Nhiem Tran
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.
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Yan Y, Chibowski E, Szcześ A. Surface properties of Ti-6Al-4V alloy part I: Surface roughness and apparent surface free energy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:207-215. [PMID: 27770882 DOI: 10.1016/j.msec.2016.08.080] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 01/20/2023]
Abstract
Titanium (Ti) and its alloys are the most often used implants material in dental treatment and orthopedics. Topography and wettability of its surface play important role in film formation, protein adhesion, following osseointegration and even duration of inserted implant. In this paper, we prepared Ti-6Al-4V alloy samples using different smoothing and polishing materials as well the air plasma treatment, on which contact angles of water, formamide and diiodomethane were measured. Then the apparent surface free energy was calculated using four different approaches (CAH, LWAB, O-W and Neumann's Equation of State). From LWAB approach the components of surface free energy were obtained, which shed more light on the wetting properties of samples surface. The surface roughness of the prepared samples was investigated with the help of optical profilometer and AFM. It was interesting whether the surface roughness affects the apparent surface free energy. It was found that both polar interactions the electron donor parameter of the energy and the work of water adhesion increased with decreasing roughness of the surfaces. Moreover, short time plasma treatment (1min) caused decrease in the surface hydrophilic character, while longer time (10min) treatment caused significant increase in the polar interactions and the work of water adhesion. Although Ti-6Al-4V alloy has been investigated many times, to our knowledge, so far no paper has been published in which surface roughness and changes in the surface free energy of the alloy were compared in the quantitative way in such large extent. This novel approach deliver better knowledge about the surface properties of differently smoothed and polished samples which may be helpful to facilitate cell adhesion, proliferation and mineralization. Therefore the results obtained present also potentially practical meaning.
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Affiliation(s)
- Yingdi Yan
- Department of Physical Chemistry-Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 2003, Lublin, Poland
| | - Emil Chibowski
- Department of Physical Chemistry-Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 2003, Lublin, Poland
| | - Aleksandra Szcześ
- Department of Physical Chemistry-Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 2003, Lublin, Poland.
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Relevant aspects in the surface properties in titanium dental implants for the cellular viability. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 64:1-10. [PMID: 27127022 DOI: 10.1016/j.msec.2016.03.049] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 01/02/2016] [Accepted: 03/14/2016] [Indexed: 11/21/2022]
Abstract
Roughness and topographical features are the most relevant of the surface properties for a dental implant for its osseointegration. For that reason, we studied the four surfaces more used in titanium dental implants: machined, sandblasted, acid etching and sandblasted plus acid etching. The roughness and wettability (contact angle and surface free energy) was studied by means 3D-interferometric microscope and sessile drop method. Normal human gingival fibroblasts (HGF) were obtained from small oral mucosa biopsies and were used for cell cultures. To analyze cell integrity, we first quantified the total amount of DNA and LDH released from dead cells to the culture medium. Then, LIVE/DEAD assay was used as a combined method assessing cell integrity and metabolism. All experiments were carried out on each cell type cultured on each Ti material for 24h, 48h and 72h. To evaluate the in vivo cell adhesion capability of each Ti surface, the four types of discs were grafted subcutaneously in 5 Wistar rats. Sandblasted surfaces were significantly rougher than acid etching and machined. Wettability and surface free energy decrease when the roughness increases in sand blasted samples. This fact favors the protein adsorption. The DNA released by cells cultured on the four Ti surfaces did not differ from that of positive control cells (p>0.05). The number of cells per area was significantly lower (p<0.05) in the sand-blasted surface than in the machined and surface for both cell types (7±2 cells for HGF and 10±5 cells for SAOS-2). The surface of the machined-type discs grafted in vivo had a very small area occupied by cells and/or connective tissue (3.5%), whereas 36.6% of the sandblasted plus acid etching surface, 75.9% of sandblasted discs and 59.6% of acid etching discs was covered with cells and connective tissue. Cells cultured on rougher surfaces tended to exhibit attributes of more differentiated osteoblasts than cells cultured on smoother surfaces. These surface properties justify that the sandblasted implants is able to significantly increase bone contact and bone growth with very good osseointegration results in vivo.
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Mahapatro A. Bio-functional nano-coatings on metallic biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:227-51. [DOI: 10.1016/j.msec.2015.05.018] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 03/20/2015] [Accepted: 05/07/2015] [Indexed: 11/28/2022]
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Im JH, Kim SG, Oh JS, Lim SC. A Comparative Study of Stability After the Installation of 2 Different Surface Types of Implants in the Maxillae of Dogs. IMPLANT DENT 2015; 24:586-91. [PMID: 26076390 DOI: 10.1097/id.0000000000000292] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE This study was performed to investigate the histologic and histomorphometric findings of 2 different types of implant. MATERIALS AND METHODS Resorbable blasting media (RBM) and sandblasted with larger grit and acid etched (SLA) surfaced implants (24 fixtures in each group) were installed in posterior maxilla of dogs. The initial stability was measured using Periotest (Periotest value [PTV]). After 6 or 12 weeks, fixtures with surrounding bone were harvested. RESULTS The average initial stability of the SLA group (-1.71 ± 2.9) was higher than that of the RBM group (-1.25 ± 3.21), but there was no significant difference. The mean PTV of the RBM surface was higher than the SLA surface at 12 weeks. The average bone-implant contacts were 67.6% ± 16.0% at 6 weeks and 82.7% ± 8.6% at 12 weeks in the SLA group and 69.9% ± 17.6% at 6 weeks and 78.3% ± 9.2% at 12 weeks in the RBM group. CONCLUSION The SLA and resorbable blasting media (RBM) surface implants demonstrated good stabilities and healing processes of the surrounding bone in the posterior maxilla. Therefore, the two domestic implants could provide predictable clinical results.
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Affiliation(s)
- Jae-Hyung Im
- *Graduate Student, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Republic of Korea
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Implant surface characteristics and their effect on osseointegration. Br Dent J 2015; 218:E9. [DOI: 10.1038/sj.bdj.2015.171] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2015] [Indexed: 11/08/2022]
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Scibior A, Adamczyk A, Mroczka R, Niedźwiecka I, Gołębiowska D, Fornal E. Effects of vanadium (V) and magnesium (Mg) on rat bone tissue: mineral status and micromorphology. Consequences of V-Mg interactions. Metallomics 2014; 6:2260-78. [PMID: 25371215 DOI: 10.1039/c4mt00234b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The extent to which the 12 week separate and combined administration of vanadium (as sodium metavanadate--SMV, 0.125 mg V per ml) and magnesium (as magnesium sulphate--MS, 0.06 mg Mg per ml) affects bone mineral status and micromorphology as well as the alkaline phosphatase (ALP) activity in femoral diaphysis (FD) was examined in male rats. The bone chemical composition of SMV-exposed rats was also investigated. SMV alone or in combination with MS (as SMV-MS) reduced the levels of MgFD (by 21% and 20%) and PFD (by 12% and 9%), lowered the CaFD content (by 7% and 10%), and caused a rise of the FeFD concentration (by 22.5% and 17%), compared with the control; SMV alone also reduced and enhanced the KFD and ZnFD concentrations (by 19% and 15%, respectively) but remained without significant effect on the femoral bone surface roughness (FBSR), whereas MS alone lowered the VFD, PFD, and CuFD levels (by 42%, 10%, and 20.6%), reduced FBSR, and created the regular femoral bone surface shape. The SMV-MS combination also induced a decline and rise in the levels of CuFD (by 30%) and NaFD (by 15%), respectively, compared with the control and the MS-supplemented rats; elevated ALPFD activity (by 24%, 35%, and 40%), compared with the control, SMV-exposed, and MS-supplemented animals; and increased FBSR. Relationships between the root mean square roughness (Sq) and skewness (Ssk): Sq [MS < SMV < Control < SMV-MS] ⇔ Ssk [SMV-MS > Control > SMV > MS], ALPFD and Sq: ALPFD⇔ Sq [SMV-MS > Control > SMV > MS], and between other variables were demonstrated. A partial limitation of the drop in the PFD and KFD levels and normalization of the ZnFD concentration were a consequence of the V-Mg antagonistic interaction whereas a consequence of the V-Mg synergistic interaction was the increase in the NaFD level, ALPFD activity, and FBSR. Ca10(PO4)5(SiO4)(OH) was part of the inorganic component of the bone of the SMV-exposed rats.
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Affiliation(s)
- Agnieszka Scibior
- Laboratory of Oxidative Stress, Center for Interdisciplinary Research, The John Paul II Catholic University of Lublin, Kraśnicka Ave, 20-718 Lublin, Poland.
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Kang NS, Li LJ, Cho SA. Comparison of removal torques between laser-treated and SLA-treated implant surfaces in rabbit tibiae. J Adv Prosthodont 2014; 6:302-8. [PMID: 25177474 PMCID: PMC4146731 DOI: 10.4047/jap.2014.6.4.302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 06/02/2014] [Accepted: 06/17/2014] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The purpose of this study was to compare removal torques and surface topography between laser treated and sandblasted, large-grit, acid-etched (SLA) treated implants. MATERIALS AND METHODS Laser-treated implants (experimental group) and SLA-treated implants (control group) 8 mm in length and 3.4 mm in diameter were inserted into both sides of the tibiae of 12 rabbits. Surface analysis was accomplished using a field emission scanning electron microscope (FE-SEM; Hitachi S-4800; Japan) under ×25, ×150 and ×1,000 magnification. Surface components were analyzed using energy dispersive spectroscopy (EDS). Rabbits were sacrificed after a 6-week healing period. The removal torque was measured using the MGT-12 digital torque meter (Mark-10 Co., Copiague, NY, USA). RESULTS In the experimental group, the surface analysis showed uniform porous structures under ×25, ×150 and ×1,000 magnification. Pore sizes in the experimental group were 20-40 mm and consisted of numerous small pores, whereas pore sizes in the control group were 0.5-2.0 mm. EDS analysis showed no significant difference between the two groups. The mean removal torque in the laser-treated and the SLA-treated implant groups were 79.4 Ncm (SD = 20.4; range 34.6-104.3 Ncm) and 52.7 Ncm (SD = 17.2; range 18.7-73.8 Ncm), respectively. The removal torque in the laser-treated surface implant group was significantly higher than that in the control group (P=.004). CONCLUSION In this study, removal torque values were significantly higher for laser-treated surface implants than for SLA-treated surface implants.
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Affiliation(s)
- Nam-Seok Kang
- Department of Prosthodontics, School of Dentistry, Kyung-Pook National University, Daegu, Republic of Korea
| | - Lin-Jie Li
- Department of Prosthodontics, School of Dentistry, Kyung-Pook National University, Daegu, Republic of Korea
| | - Sung-Am Cho
- Department of Prosthodontics, School of Dentistry, Kyung-Pook National University, Daegu, Republic of Korea
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Kaluđerović MR, Schreckenbach JP, Graf HL. First titanium dental implants with white surfaces: Preparation and in vitro tests. Dent Mater 2014; 30:759-68. [DOI: 10.1016/j.dental.2014.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 01/30/2014] [Accepted: 04/22/2014] [Indexed: 01/07/2023]
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Kwon H, Rainbow RS, Sun L, Hui CK, Cairns DM, Preda RC, Kaplan DL, Zeng L. Scaffold structure and fabrication method affect proinflammatory milieu in three-dimensional-cultured chondrocytes. J Biomed Mater Res A 2014; 103:534-44. [PMID: 24753349 DOI: 10.1002/jbm.a.35203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 04/13/2014] [Accepted: 04/18/2014] [Indexed: 01/08/2023]
Abstract
Cartilage tissue engineering has emerged as an attractive therapeutic option for repairing damaged cartilage tissue in the arthritic joint. High levels of proinflammatory cytokines present at arthritic joints can cause cartilage destruction and instability of the engineered cartilage tissue, and thus it is critical to engineer strong and stable cartilage that is resistant to the inflammatory environment. In this study, we demonstrate that scaffolding materials with different pore sizes and fabrication methods influence the microenvironment of chondrocytes and the response of these cells to proinflammatory cytokines, interleukin-1beta, and tumor necrosis factor alpha. Silk scaffolds prepared using the organic solvent hexafluoroisopropanol as compared to an aqueous-based method, as well as those with larger pore sizes, supported the deposition of higher cartilage matrix levels and lower expression of cartilage matrix degradation-related genes, as well as lower expression of endogenous proinflammatory cytokines IL-1β in articular chondrocytes. These biochemical properties could be related to the physical properties of the scaffolds such as the water uptake and the tendency to leach or adsorb proinflammatory cytokines. Thus, scaffold structure may influence the behavior of chondrocytes by influencing the microenvironment under inflammatory conditions, and should be considered as an important component for bioengineering stable cartilage tissues.
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Affiliation(s)
- Heenam Kwon
- Program in Cell, Molecular, and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, Massachusetts, 02111
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Abstract
Researchers are in constant search for the ideal implant surface condition in an attempt to improve osseointegration of the implant and to increase bone-to-implant contact. Although introduction of rough surfaces was able to overcome a lot of limitations that presented with machined surfaces, they are still incapable of ensuring predictable results and guaranteed success. Various techniques in implant surface modifications have been proposed, all aimed at improving bone formation around dental implants. Understanding how surface modification of dental implants can impact osseointegration might help the clinician to maximize the success rate of implants and diminish the complications that can be encountered after their placement. In view of that, this article is aimed at assessing the different surface conditioning techniques available and will present a review of the literature that focuses on the influence of microdesign of dental implants on their osseointegration.
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Herrero-Climent M, Lázaro P, Vicente Rios J, Lluch S, Marqués M, Guillem-Martí J, Gil FJ. Influence of acid-etching after grit-blasted on osseointegration of titanium dental implants: in vitro and in vivo studies. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2047-2055. [PMID: 23625320 DOI: 10.1007/s10856-013-4935-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 04/18/2013] [Indexed: 06/02/2023]
Abstract
Rough implant surfaces have shown improved osseointegration rates. In a majority of dental implants, the microrough surfaces are obtained by grit blasting and/or acid-etching. The aim of this contribution was to evaluate the effects of acid-etching, after the grit-blasted treatment in titanium dental implants, on surface wettability, surface energy, osteoblast responses and its osseointegration behavior. Four surfaces were studied: as-machined, acid-etched, micro-rough by grit-blasting and the combination grit-blasted surface with acid-etched. The surfaces with increasing roughness show more osteoblastic adhered cells. This effect was most pronounced on samples blasted and blasted with acid-etching. The roughness obtained by grit-blasting is the main factor in comparison with the acid etching treatment in the biological response. These results were confirmed in vivo tests and histological analysis. The results demonstrated that the combination of the grit-blasted and acid-etched accelerated lightly bone regeneration at the different periods of implantation in comparison with the grit-blasted implants.
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Nanosized fibers' effect on adult human articular chondrocytes behavior. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1539-45. [DOI: 10.1016/j.msec.2012.12.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/24/2012] [Accepted: 12/17/2012] [Indexed: 10/27/2022]
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Scarano A, Degidi M, Perrotti V, Degidi D, Piattelli A, Iezzi G. Experimental Evaluation in Rabbits of the Effects of Thread Concavities in Bone Formation with Different Titanium Implant Surfaces. Clin Implant Dent Relat Res 2013; 16:572-81. [DOI: 10.1111/cid.12033] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Antonio Scarano
- Department of Medical; Oral and Biotechnological Sciences, Dental School, University of Chieti-Pescara; Italy
| | | | - Vittoria Perrotti
- Department of Medical; Oral and Biotechnological Sciences, Dental School, University of Chieti-Pescara; Italy
| | | | - Adriano Piattelli
- Department of Medical; Oral and Biotechnological Sciences, Dental School, University of Chieti-Pescara; Italy
| | - Giovanna Iezzi
- Department of Medical; Oral and Biotechnological Sciences, Dental School, University of Chieti-Pescara; Italy
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Osseointegration—Molecular events at the bone–implant interface: A review. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY MEDICINE AND PATHOLOGY 2013. [DOI: 10.1016/j.ajoms.2012.01.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Microstructural and topographical characterization of different surface treatments of a surgical titanium alloy for dental implants. IMPLANT DENT 2012; 21:207-12. [PMID: 22584420 DOI: 10.1097/id.0b013e3182566e19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To perform a topographical characterization of a titanium alloy subjected to different surface treatments using roughness evaluation, scanning electron microscopy, and atomic force microscopy. MATERIALS AND METHODS For each group, 6 discs of a titanium alloy had their surfaces modified by 4 treatments. All surfaces were blasted with Al2O3, cleaned, and the specimens were divided into 4 groups: G1, immersion in a standardized acid solution (SAS) (control group); G2, immersion in acetone, followed by immersion in SAS; G3, immersion in acetone, followed by immersion in SAS, followed by immersion in nitric acid; G4, immersion in acetone, followed by immersion in SAS, followed by immersion in sulfuric acid. Roughness parameters were determined with a roughness tester, and data were statistically analyzed using analysis of variance and Tukey tests (α = 5%). RESULTS Regarding the roughness parameters, no significant differences were found. Scanning electron microscopy and atomic force microscopy showed irregular surfaces with the presence of particles uniformly deposited on the surfaces. CONCLUSION A similar roughness pattern was created for all the groups. The images and topographic profiles indicated that all the groups showed high levels of roughness.
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Sitasuwan P, Andrew Lee L, Bo P, Davis EN, Lin Y, Wang Q. A plant virus substrate induces early upregulation of BMP2 for rapid bone formation. Integr Biol (Camb) 2012; 4:651-60. [DOI: 10.1039/c2ib20041d] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Gulati K, Ramakrishnan S, Aw MS, Atkins GJ, Findlay DM, Losic D. Biocompatible polymer coating of titania nanotube arrays for improved drug elution and osteoblast adhesion. Acta Biomater 2012; 8:449-56. [PMID: 21930254 DOI: 10.1016/j.actbio.2011.09.004] [Citation(s) in RCA: 161] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 08/28/2011] [Accepted: 09/01/2011] [Indexed: 02/03/2023]
Abstract
Bacterial infection, extensive inflammation and poor osseointegration have been identified as the major reasons for [early] orthopaedic implant failures based on titanium. Creating implants with drug-eluting properties to locally deliver drugs is an appealing way to address some of these problems. To improve properties of titanium for orthopaedic applications, this study explored the modification of titanium surfaces with titaniananotube (TNT) arrays, and approach that combines drug delivery into bone and potentially improved bone integration. A titania layer with an array of nanotube structures (∼120 nm in diameter and 50 μm in length) was synthesized on titanium surfaces by electrochemical anodization and loaded with the water-insoluble anti-inflammatory drug indomethacin. A simple dip-coating process of polymer modification formed thin biocompatible polymer films over the drug-loaded TNTs to create TNTs with predictable drug release characteristics. Two biodegradable and antibacterial polymers, chitosan and poly(lactic-co-glycolic acid), were tested for their ability to extend the drug release time of TNTs and produce favourable bone cell adhesion properties. Dependent on polymer thickness, a significant improvement in the drug release characteristics was demonstrated, with reduced burst release (from 77% to >20%) and extended overall release from 4 days to more than 30 days. Excellent osteoblast adhesion and cell proliferation on polymer-coated TNTs compared with uncoated TNTs were also observed. These results suggest that polymer-modified implants with a TNT layer are capable of delivering a drug to a bone site over an extended period and with predictable kinetics. In addition, favourable bone cell adhesion suggests that such an implant would have good biocompatibility. The described approach is broadly applicable to a wide range of drugs and implants currently used in orthopaedic practice.
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Miranda ES, Silva TH, Reis RL, Mano JF. Nanostructured Natural-Based Polyelectrolyte Multilayers to Agglomerate Chitosan Particles into Scaffolds for Tissue Engineering. Tissue Eng Part A 2011; 17:2663-74. [DOI: 10.1089/ten.tea.2010.0635] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Emanuel Sá Miranda
- 3B's Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Tiago H. Silva
- 3B's Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L. Reis
- 3B's Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João F. Mano
- 3B's Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Taipas, Guimarães, Portugal
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Bhola R, Bhola SM, Mishra B, Ayers R, Olson DL, Ohno T. Cellular Response of Titanium and Its Alloys as Implants. J ORAL IMPLANTOL 2011; 37:387-99. [DOI: 10.1563/aaid-joi-d-09-00075.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
The cellular response of osteocytes to commercially pure titanium (α) and its alloys (α + β and β) has been tested in a culture media, and the results have been supplemented by analyses from various techniques such as inductively coupled plasma atomic emission spectroscopic (ICP-AES) analysis, X-ray photoemission spectroscopy (XPS), scanning electron microscopy (SEM), metallography, and electrochemical measurements. These results have been correlated with respect to the presence of various alloying elements in these alloys to qualify them for human application. The newer β alloys have been examined for their potential use as implants. These results serve as a preliminary baseline to characterize the best alloy system for a comprehensive long-term investigation.
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Affiliation(s)
- Rahul Bhola
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colo
| | - Shaily M Bhola
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colo
| | - Brajendra Mishra
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colo
| | - Reed Ayers
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colo
| | - David L Olson
- Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colo
| | - Timothy Ohno
- Department of Physics, Colorado School of Mines, Golden, Colo
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Pak HS, Yeo IS, Yang JH. A histomorphometric study of dental implants with different surface characteristics. J Adv Prosthodont 2010; 2:142-7. [PMID: 21264193 PMCID: PMC3024504 DOI: 10.4047/jap.2010.2.4.142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 11/15/2010] [Accepted: 12/16/2010] [Indexed: 11/08/2022] Open
Abstract
PURPOSE One of the major keys to achieve successful osseointegration of the implant is its surface properties. The aim of this study was to investigate the bone response to dental implants with different surface characteristics using the rabbit tibia model. Tricalcium phosphate (TCP) coated, anodic oxidized and turned (control) surfaces were compared. MATERIALS AND METHODS Seventy two implants were placed in the tibia of eighteen rabbits. Nine rabbits were sacrificed at 3 weeks of healing and the remaining nine were sacrificed at 6 weeks of healing. The bone-to-implant contact (BIC) and the bone volume density (BVD) were assessed by light microscope after 3 and 6 weeks of healing. RESULTS Statistical analysis showed that no significant differences in the BIC and BVD were observed between the different implant surfaces and the control group at 3 weeks and 6 weeks of healing. Data also suggested that the BVD of all the surfaces showed significant difference at 3 and 6 weeks. CONCLUSION The present study has showed that osseointegration occurred in all investigated types of surface-treated implants. In the current study all of the threads of the implants were observed to calculate BIC and BVD values (instead of choosing some of the threads from the bone cortex for example), which didn't make BIC or BVD percentage values better than in the control group, therefore the clinical relevance of these results remains to be shown.
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Affiliation(s)
- Hyun-Soon Pak
- Department of Prosthodontics, Graduate School, Seoul National University, Seoul, Korea
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Stenhamre H, Nannmark U, Lindahl A, Gatenholm P, Brittberg M. Influence of pore size on the redifferentiation potential of human articular chondrocytes in poly(urethane urea) scaffolds. J Tissue Eng Regen Med 2010; 5:578-88. [DOI: 10.1002/term.350] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Accepted: 07/08/2010] [Indexed: 01/16/2023]
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Mamalis AA, Silvestros SS. Analysis of osteoblastic gene expression in the early human mesenchymal cell response to a chemically modified implant surface: an in vitro study. Clin Oral Implants Res 2010; 22:530-7. [PMID: 21121959 DOI: 10.1111/j.1600-0501.2010.02049.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVES The effect of a chemical modification of the SLA surface (SLActive surface) on human bone marrow-derived mesenchymal cells (hMSCs) on; (1) adhesion, (2) proliferation and (3) early transcriptional control of osteogenic differentiation was investigated. We are based on the hypothesis that expression patterns of genes responsible for osteogenesis might be dependent on the characteristics of the implant surface. MATERIAL AND METHODS hMSCs were allowed to grow on smooth (SMO-control), SLA and SLActive implant surfaces (chemically modified). Cell attachment and proliferation were assessed at 3 and 24 h using a MTT dye reduction assay. At 24 h of culture, DNA microarray analysis examined alterations in early gene expression using a human osteogenesis gene array, including 109 cDNAs in quadruplicates of major regulatory genes for osteogenesis. RESULTS Initial attachment and proliferation were found to be significantly reduced. Nineteen genes were significantly upregulated when hMSCs were cultured on the SLA surfaces and 27 genes were significantly upregulated when hMSCs were cultured on the SLActive surfaces. Upregulated genes control cell differentiation, signal transduction, cell cycle regulation, angiogenesis, cell adhesion and extracellular matrix and bone formation. DISCUSSION Chemical modification decreases further cell attachment and proliferation and upregulates early osteoblastic differentiation genes. Hence, a microenvironment is created around chemically modified implants that may enhance osseointegration.
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Affiliation(s)
- Anastasios A Mamalis
- Department of Periodontics, University of Texas, Health Science Center at San Antonio, USA.
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Gunja NJ, Huey DJ, James RA, Athanasiou KA. Effects of agarose mould compliance and surface roughness on self-assembled meniscus-shaped constructs. J Tissue Eng Regen Med 2010; 3:521-30. [PMID: 19658151 DOI: 10.1002/term.191] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The meniscus is a fibrocartilaginous tissue that is critically important to the loading patterns within the knee joint. If the meniscus structure is compromised, there is little chance of healing, due to limited vascularity in the inner portions of the tissue. Several tissue-engineering techniques to mimic the complex geometry of the meniscus have been employed. Of these, a self-assembly, scaffoldless approach employing agarose moulds avoids drawbacks associated with scaffold use, while still allowing the formation of robust tissue. In this experiment two factors were examined, agarose percentage and mould surface roughness, in an effort to consistently obtain constructs with adequate geometric properties. Co-cultures of ACs and MCs (50:50 ratio) were cultured in smooth or rough moulds composed of 1% or 2% agarose for 4 weeks. Morphological results showed that constructs formed in 1% agarose moulds, particularly smooth moulds, were able to maintain their shape over the 4 week culture period. Significant increases were observed for the collagen II:collagen I ratio, total collagen, GAG and tensile and compressive properties in smooth wells. Cell number per construct was higher in the rough wells. Overall, it was observed that the topology of an agarose surface may be able to affect the phenotypic properties of cells that are on that surface, with smooth surfaces supporting a more chondrocytic phenotype. In addition, wells made from 1% agarose were able to prevent construct buckling potentially, due to their higher compliance.
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Affiliation(s)
- Najmuddin J Gunja
- Department of Bioengineering, Rice University, Houston, TX 77251, USA
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Spatial organization of osteoblast fibronectin matrix on titanium surfaces: effects of roughness, chemical heterogeneity and surface energy. Acta Biomater 2010; 6:291-301. [PMID: 19635598 DOI: 10.1016/j.actbio.2009.07.030] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Revised: 07/03/2009] [Accepted: 07/21/2009] [Indexed: 11/20/2022]
Abstract
We investigated the early events of bone matrix formation, and specifically the role of fibronectin (FN) in the initial osteoblast interaction and the subsequent organization of a provisional FN matrix on different rough titanium (Ti) surfaces. Fluorescein isothiocyanate-labelled FN was preadsorbed on these surfaces and studied for its three-dimensional (3-D) organization by confocal microscopy, while its amount was quantified after NaOH extraction. An irregular pattern of adsorption with a higher amount of protein on topographic peaks than on valleys was observed and attributed to the physicochemical heterogeneity of the rough Ti surfaces. MG63 osteoblast-like cells were further cultured on FN-preadsorbed Ti surfaces and an improved initial cellular interaction was observed with increasing roughness. 3-D reconstruction of the immunofluorescence images after 4 days of incubation revealed that osteoblasts deposit FN fibrils in a specific facet-like pattern that is organized within the secreted total matrix overlying the top of the samples. The thickness of this FN layer increased when the roughness of the underlying topography was increased, but not by more than half of the total maximum peak-to-valley distance, as demonstrated with images showing simultaneous reconstruction of fluorescence and topography after 7 days of cell culture.
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Rong M, Zhou L, Gou Z, Zhu A, Zhou D. The early osseointegration of the laser-treated and acid-etched dental implants surface: an experimental study in rabbits. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:1721-1728. [PMID: 19291368 DOI: 10.1007/s10856-009-3730-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Accepted: 03/03/2009] [Indexed: 05/27/2023]
Abstract
The aim of the study was to evaluate early osseointegration of the laser-treated and acid-etched implant surface after the installation in rabbit tibias for 4 weeks. A total of 56 screw-shaped implants were grouped as follows: group A: implants were turned surface; group B: implants were laser-treated surface; group C: implants were acid-etched; group D: Implants were laser-treated and acid-etched surface. After 4 weeks, the removal torques were: group A: 13.21 +/- 11.30 Ncm; group B: 29.73 +/- 8.32 Ncm; group C: 30.31 +/- 9.45 Ncm; group D: 35.76 +/- 7.58 Ncm; The averages of bone-to-implant contact (BIC) were as follows: group A: 27.30 +/- 6.55%; group B: 38.00 +/- 8.56%; group C: 42.71 +/- 8.48%; group D: 49.71 +/- 9.21%. The removal torque and bone-to-implant contact measurements yielded statistically significant differences between the treated groups and turned group (P < 0.05); The laser-treated and acid-etched surface achieved higher Bone-to-Implant Contact than the laser-treated surface (P < 0.05), but there was no statistically significant difference between the laser-treated and acid-etched surface and the acid-etched surface in bone-to-implant contact (P > 0.05). In the present study, it was concluded that the laser-treated and acid-etched implants had good osteoconductivity and was a potential material for dental implantation.
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Affiliation(s)
- Mingdeng Rong
- Department of Oral and Maxillofacial Surgery, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, China
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