1
|
Vasile VA, Pirvulescu RA, Iancu RC, Garhöfer G, Schmetterer L, Ghita AM, Ionescu D, Istrate S, Piticescu RM, Cursaru LM, Popa-Cherecheanu A. Titanium Implants Coated with Hydroxyapatite Used in Orbital Wall Reconstruction-A Literature Review. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1676. [PMID: 38612189 PMCID: PMC11012370 DOI: 10.3390/ma17071676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024]
Abstract
With the increasing incidences of orbital wall injuries, effective reconstruction materials and techniques are imperative for optimal clinical outcomes. In this literature review, we delve into the efficacy and potential advantages of using titanium implants coated with nanostructured hydroxyapatite for the reconstruction of the orbital wall. Titanium implants, recognized for their durability and mechanical strength, when combined with the osteoconductive properties of hydroxyapatite, present a potentially synergistic solution. The purpose of this review was to critically analyze the recent literature and present the state of the art in orbital wall reconstruction using titanium implants coated with nanostructured hydroxyapatite. This review offers clinicians detailed insight into the benefits and potential drawbacks of using titanium implants coated with nanostructured hydroxyapatite for orbital wall reconstruction. The highlighted results advocate for its benefits in terms of osseointegration and provide a novel strategy for orbital reconstruction, though further studies are essential to establish long-term efficacy and address concerns.
Collapse
Affiliation(s)
- Victor A. Vasile
- Department of Ophthalmology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania; (V.A.V.)
- Department of Ophthalmology, Emergency University Hospital, 050098 Bucharest, Romania
| | - Ruxandra A. Pirvulescu
- Department of Ophthalmology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania; (V.A.V.)
- Department of Ophthalmology, Emergency University Hospital, 050098 Bucharest, Romania
| | - Raluca C. Iancu
- Department of Ophthalmology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania; (V.A.V.)
- Department of Ophthalmology, Emergency University Hospital, 050098 Bucharest, Romania
| | - Gerhard Garhöfer
- Department of Clinical Pharmacology, Medical University of Vienna, 1090 Vienna, Austria
| | - Leopold Schmetterer
- Department of Clinical Pharmacology, Medical University of Vienna, 1090 Vienna, Austria
- Singapore National Eye Centre, Singapore Eye Research Institute, Singapore 168751, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, National University of Singapore, Singapore 169857, Singapore
- SERI-NTU Advanced Ocular Engineering (STANCE), Singapore 639798, Singapore
- School of Chemical and Biological Engineering, Nanyang Technological University, Singapore 637459, Singapore
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, 1090 Vienna, Austria
- Institute of Molecular and Clinical Ophthalmology, 4056 Basel, Switzerland
| | - Aurelian M. Ghita
- Department of Ophthalmology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania; (V.A.V.)
- Department of Ophthalmology, Emergency University Hospital, 050098 Bucharest, Romania
| | - Diana Ionescu
- Department of ENT, Children’s Clinical Hospital “Dr. V. Gomoiu”, 022102 Bucharest, Romania
| | | | - Roxana M. Piticescu
- Nanostructured Materials Laboratory, National R&D Institute for Nonferrous and Rare Metals, 077145 Pantelimon, Romania
| | - Laura M. Cursaru
- Nanostructured Materials Laboratory, National R&D Institute for Nonferrous and Rare Metals, 077145 Pantelimon, Romania
| | - Alina Popa-Cherecheanu
- Department of Ophthalmology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania; (V.A.V.)
- Department of Ophthalmology, Emergency University Hospital, 050098 Bucharest, Romania
| |
Collapse
|
2
|
Özmeriç N, Çakal GÖ, Gökmenoğlu C, Özmeriç A, Oduncuoğlu BF, Hacaloğlu T, Kaftanoğlu B. Histomorphometric and biomechanical evaluation of the osseointegration around micro- and nano-level boron-nitride coated titanium dental implants. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2022; 123:e694-e700. [PMID: 35724866 DOI: 10.1016/j.jormas.2022.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/08/2022] [Accepted: 06/16/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Titanium dental implants has been coated with different materials such as polymers and biomimetic agents, bone morphogenetic protein, calcium phosphate to enhance surface properties of the titanium implants for osseointegration. The aim of this study was to evaluate the bone tissue healing around Boron Nitride-coated (BN-coated) titanium implants histomorphometrically and biomechanically and also observe the effect of different coating thicknesses on osseointegration. MATERIALS AND METHODS BN was coated on dental titanium implants with two different coating thicknesses by using RF magnetron sputtering system. Totally fifty-four implants were inserted into the tibias' of 12 New Zealand rabbits bilaterally under general anesthesia. All animals were sacrificed after 4-weeks. Bone-implant contact (BIC) and new bone area/total area ratios (BATA) were calculated. Also, the removal torque (RT) test was performed. RESULTS The highest new bone area in the medullary cavity was around the nano-BN-coated surface with 15.70%. In micro-BN-coated surface and control group, this ratio was determined as 10.48% and 8.23%, respectively. The BIC ratios in upper-side of implants and cortical-associated BIC ratios in lower-side were found significantly higher in control and micro-BN-coated group than nano-BN-coated group (p < 0.05). Similar BIC values were observed between control and micro-BN-coated groups (p > 0.05). BATA values did not show statistically significant differences between all three groups (p > 0.05). The RT values measured in all groups were found comparable and no statistically significant differences were found (p > 0.05). CONCLUSION No inflammatory reaction developed around any implant. Relatively more new bone formation around nano-BN-coated titanium implants indicates the promising osseoinductive effect of BN coating. BN-coated implants showed similar biomechanical and histomorphometrical outcomes to that of the conventional titanium implants through a 4-week evaluation period.
Collapse
Affiliation(s)
- Nurdan Özmeriç
- Department of Periodontology, Faculty of Dentistry, Gazi University, Bişkek Caddesi, 06510 Ankara, Turkey
| | - Gaye Özgür Çakal
- Institute of Nuclear Sciences, Ankara University, Tandoğan Campus, 06100 Ankara, Turkey
| | - Ceren Gökmenoğlu
- Department of Periodontology, Faculty of Dentistry, Ordu University, 52100, Ordu, Turkey.
| | - Ahmet Özmeriç
- Department of Orthopedics and Traumatology, SBU Ankara Training and Research Hospital, 06340 Ankara, Turkey
| | - Bahar Füsun Oduncuoğlu
- Department of Periodontology, Faculty of Dentistry, Baskent University, 06590 Ankara, Turkey
| | - Tuğçe Hacaloğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
| | - Bilgin Kaftanoğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
| |
Collapse
|
3
|
Medical Adhesives and Their Role in Laparoscopic Surgery—A Review of Literature. MATERIALS 2022; 15:ma15155215. [PMID: 35955150 PMCID: PMC9369661 DOI: 10.3390/ma15155215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/15/2022] [Accepted: 07/20/2022] [Indexed: 01/27/2023]
Abstract
Laparoscopic surgery is undergoing rapid development. Replacing the traditional method of joining cut tissues with sutures or staples could greatly simplify and speed up laparoscopic procedures. This alternative could undoubtedly be adhesives. For decades, scientists have been working on a material to bond tissues together to create the best possible conditions for tissue regeneration. The results of research on tissue adhesives achieved over the past years show comparable treatment effects to traditional methods. Tissue adhesives are a good alternative to surgical sutures in wound closure. This article is a review of the most important groups of tissue adhesives including their properties and possible applications. Recent reports on the development of biological adhesives are also discussed.
Collapse
|
4
|
Safi IN, Hussein BMA, Al-Shammari AM. Bio-hybrid dental implants prepared using stem cells with β-TCP-coated titanium and zirconia. J Periodontal Implant Sci 2022; 52:242-257. [PMID: 35775699 PMCID: PMC9253282 DOI: 10.5051/jpis.2006080304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/07/2021] [Accepted: 10/20/2021] [Indexed: 11/08/2022] Open
Abstract
Purpose This study investigated periodontal ligament (PDL) restoration in osseointegrated implants using stem cells. Methods Commercial pure titanium and zirconium oxide (zirconia) were coated with beta-tricalcium phosphate (β-TCP) using a long-pulse Nd:YAG laser (1,064 nm). Isolated bone marrow mesenchymal cells (BMMSCs) from rabbit tibia and femur, isolated PDL stem cells (PDLSCs) from the lower right incisor, and co-cultured BMMSCs and PDLSCs were tested for periostin markers using an immunofluorescent assay. Implants with 3D-engineered tissue were implanted into the lower right central incisors after extraction from rabbits. Forty implants (Ti or zirconia) were subdivided according to the duration of implantation (healing period: 45 or 90 days). Each subgroup (20 implants) was subdivided into 4 groups (without cells, PDLSC sheets, BMMSC sheets, and co-culture cell sheets). All groups underwent histological testing involving haematoxylin and eosin staining and immunohistochemistry, stereoscopic analysis to measure the PDL width, and field emission scanning electron microscopy (FESEM). The natural lower central incisors were used as controls. Results The BMMSCs co-cultured with PDLSCs generated a well-formed PDL tissue that exhibited positive periostin expression. Histological analysis showed that the implantation of coated (Ti and zirconia) dental implants without a cell sheet resulted in a well-osseointegrated implant at both healing intervals, which was confirmed with FESEM analysis and negative periostin expression. The mesenchymal tissue structured from PDLSCs only or co-cultured (BMMSCs and PDLSCs) could form a natural periodontal tissue with no significant difference between Ti and zirconia implants, consequently forming a biohybrid dental implant. Green fluorescence for periostin was clearly detected around the biohybrid implants after 45 and 90 days. FESEM showed the invasion of PDL-like fibres perpendicular to the cementum of the bio-hybrid implants. Conclusions β-TCP-coated (Ti and zirconia) implants generated periodontal tissue and formed biohybrid implants when mesenchymal-tissue-layered cell sheets were isolated from PDLSCs alone or co-cultured BMMSCs and PDLSCs.
Collapse
Affiliation(s)
- Ihab Nabeel Safi
- Prosthetics Department, Collage of Dentistry, University of Baghdad, Baghdad, Iraq
| | | | - Ahmed Majeed Al-Shammari
- Experimental Therapy Department, Iraqi Center for Cancer and Medical Genetic Research, Mustansiriyah University, Baghdad, Iraq
| |
Collapse
|
5
|
Majhi R, Majhi RK, Garhnayak L, Patro TK, Dhal A, Kumar S, Guha P, Goswami L, Goswami C. Comparative evaluation of surface-modified zirconia for the growth of bone cells and early osseointegration. J Prosthet Dent 2021; 126:92.e1-92.e8. [PMID: 34049698 DOI: 10.1016/j.prosdent.2021.04.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/04/2021] [Accepted: 04/05/2021] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Rapid osseointegration between implant and bone tissue for early loading of a prosthesis with sufficient primary stability depends on the surface characteristics of the implant. The development and characterization of suitable surface coatings on dental implants is a major challenge. PURPOSE The purpose of this in vitro study was to evaluate and compare the osteogenic potential and cytotoxicity of unmodified zirconia, acid-etched zirconia, bioactive glass-coated zirconia, and tamarind kernel polysaccharide with hydrophilic acrylic acid (TKP-AA) hydrogel-coated zirconia. MATERIAL AND METHODS Thirty-six disks each of unmodified zirconia, acid-etched, 45S5 bioactive glass-coated, and TKP-AA hydrogel-coated zirconia were evaluated for osteogenic potential and cytotoxic effect by using human osteoblast Saos-2 cells. The surface topography of the disks and the morphology of the cells grown on these surfaces were examined by scanning electron microscopy (n=3). The cell attachment was evaluated by confocal imaging (n=3). The cytotoxic effect was evaluated by cell viability assay (n=9). Osteoblast maturation was assessed by alkaline phosphatase assay (n=9) and cell mineralization by alizarin red staining (n=9). ANOVA and Bonferroni multiple comparison post hoc tests were used to evaluate the statistical significance of the intergroup differences in these characteristics (α=.05). RESULTS The surface modifications resulted in distinct changes in the surface morphology of zirconia disks and the growth of Saos-2 cells. Zirconia disks coated with TKP-AA promoted higher proliferation of osteoblasts compared with unmodified disks (P<.001). Similarly, the surface modifications significantly increased the differentiation of mesenchymal stem cells to osteoblasts as compared with uncoated zirconia (P<.001). However, the rate of differentiation to osteoblasts was similar among the surface modifications. Acid-etched and TKP-AA-coated disks promoted mineralization of osteoblasts to the same extent, except bioactive glass coating, which significantly increased the rate of mineralization (P<.001). CONCLUSIONS Surface modification of zirconia by acid etching and coating with Bioglass or TKP-AA hydrogel resulted in the improved growth and differentiation of osteoblasts. TKP-AA hydrogel coating promoted the proliferation of osteoblasts, whereas Bioglass coating showed better mineralization. TKP-AA hydrogel coating is a promising candidate for improving the osseointegration of dental implants that warrants further investigation.
Collapse
Affiliation(s)
- Rashmita Majhi
- Master in Dental Surgery, Department of Prosthodontics, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Rakesh Kumar Majhi
- Postdoctoral Researcher, School of Biological Sciences, National Institute of Science Education and Research, Jatni, Bhubaneswar, Odisha, India
| | - Lokanath Garhnayak
- Associate Professor, Department of Prosthodontics, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Tapan Kumar Patro
- Professor and Head of Department, Department of Prosthodontics, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Angurbala Dhal
- Associate Professor, Department of Prosthodontics, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Satish Kumar
- Research Fellow, School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT), Bhubaneswar, Odisha, India
| | - Puspendu Guha
- Postdoctoral Researcher, Institute of Physics, Sachivalaya Marg, Bhubaneswar, India
| | - Luna Goswami
- Associate Professor, School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT), Bhubaneswar, Odisha, India; Associate Professor, School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Bhubaneswar, Odisha, India
| | - Chandan Goswami
- Associate Professor, School of Biological Sciences, National Institute of Science Education and Research, Jatni, Bhubaneswar, Odisha, India; Associate Professor, Homi Bhabha National Institute, Training School Complex, Mumbai, India.
| |
Collapse
|
6
|
Safi IN, Hussein BMA, Al Shammari AM, Tawfiq TA. Implementation and characterization of coating pure titanium dental implant with sintered β-TCP by using Nd:YAG laser. Saudi Dent J 2019; 31:242-250. [PMID: 30983835 PMCID: PMC6445442 DOI: 10.1016/j.sdentj.2018.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 12/22/2018] [Accepted: 12/26/2018] [Indexed: 02/04/2023] Open
Abstract
Objectives This work presents laser coating of grade 1 pure titanium (Ti) dental implant surface with sintered biological apatite beta-tricalcium phosphate (β-TCP), which has a chemical composition close to bone. Materials and methods Pulsed Nd:YAG laser of single pulse capability up to 70 J/10 ms and pulse peak power of 8 kW was used to implement the task. Laser pulse peak power, pulse duration, repetition rate and scanning speed were modulated to achieve the most homogenous, cohesive and highly adherent coat layer. Scanning electron microscopy (SEM), energy dispersive X-ray microscopy (EDX), optical microscopy and nanoindentation analyses were conducted to characterise and evaluate the microstructure, phases, modulus of elasticity of the coating layer and calcium-to-phosphate ratio and composition. Results showed that the laser power and scanning speed influenced coating adherence. The cross-sectional field-emission scanning electron microscopy images at low power and high speed showed poor adherence and improved as the laser power increased to 2 kW. Decreasing the scanning speed to 0.2 mm/s at the same power of 2 kW increased adherence. EDX results of the substrate demonstrated that the chemical composition of the coat layer did not change after processing. Moreover, the maps revealed proper distribution of Ca and P with some agglomeration on the surface. The sharp peaks on the X-ray diffraction patterns indicated that β-TCPs in the coat layer were mostly crystalline. The elastic modulus was low at the surface and increased gradually with depth to reach 19 GPa at 200 nm; this value was close to that of bone. The microhardness of the coated substrate increased by about 88%. The laser pulse energy of 8.3 J, pulse peak power of 2 kW, pulse duration of 4.3 min, repetition rate of 10 Hz and scanning speed of 0.2 ms−1 yielded the best results. Conclusion Both processing and coating have potential use for dental implant applications.
Collapse
Affiliation(s)
| | | | - Ahmed Majeed Al Shammari
- Experimental Therapy Department, Iraqi Center for Cancer and Medical Genetic Research, Mustansiriyah University, Iraq
| | - Thaier Abid Tawfiq
- Institute of Laser for Postgraduate Studies, University of Baghdad, Iraq
| |
Collapse
|
7
|
Sivaraman K, Shanthi C. Matrikines for therapeutic and biomedical applications. Life Sci 2018; 214:22-33. [PMID: 30449450 DOI: 10.1016/j.lfs.2018.10.056] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 12/25/2022]
Abstract
Matrikines, peptides originating from the fragmentation of extracellular matrix proteins are identified to play important role in both health and disease. They possess biological activities, much different from their parent protein. Identification of such bioactive cryptic regions in the extracellular matrix proteins has attracted the researchers all over the world in the recent decade. These bioactive peptides could find use in preparation of biomaterials and tissue engineering applications. Matrikines identified in major extracellular matrix (ECM) proteins like collagen, elastin, fibronectin, and laminin are being extensively studied for use in tissue engineering and regenerative medicine. They are identified to modulate cellular activity like cell growth, proliferation, migration and may induce apoptosis. RGD, a well-known peptide identified in fibronectin with cell adhesive property is being investigated in designing biomaterials. Collagen hexapeptide GFOGER was found to promote cell adhesion and differentiation. Laminin also possesses regions with strong cell adhesion property. Recently, cell-penetrating peptides from elastin are used as a targeted delivery system for therapeutic drugs. The continued search for cryptic sequences in the extracellular matrix proteins along with advanced peptide coupling chemistries would lead to biomaterials with improved surface properties. This review article outlines the peptides derived from extracellular matrix and some of the possible applications of these peptides in therapeutics and tissue engineering applications.
Collapse
Affiliation(s)
- K Sivaraman
- School of Biosciences and Technology, VIT, Vellore 632014, Tamilnadu, India
| | - C Shanthi
- School of Biosciences and Technology, VIT, Vellore 632014, Tamilnadu, India.
| |
Collapse
|
8
|
Staehlke S, Rebl H, Finke B, Mueller P, Gruening M, Nebe JB. Enhanced calcium ion mobilization in osteoblasts on amino group containing plasma polymer nanolayer. Cell Biosci 2018; 8:22. [PMID: 29588849 PMCID: PMC5863460 DOI: 10.1186/s13578-018-0220-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/14/2018] [Indexed: 11/23/2022] Open
Abstract
Background Biomaterial modifications—chemical and topographical—are of particular importance for the integration of materials in biosystems. Cells are known to sense these biomaterial characteristics, but it has remained unclear which physiological processes bio modifications trigger. Hence, the question arises of whether the dynamic of intracellular calcium ions is important for the characterization of the cell–material interaction. In our prior research we could demonstrate that a defined geometrical surface topography affects the cell physiology; this was finally detectable in a reduced intracellular calcium mobilization after the addition of adenosine triphosphate (ATP). Results This new contribution examines the cell physiology of human osteoblasts concerning the relative cell viability and the calcium ion dynamic on different chemical modifications of silicon–titanium (Ti) substrates. Chemical modifications comprising the coating of Ti surfaces with a plasma polymerized allylamine (PPAAm)-layer or with a thin layer of collagen type-I were compared with a bare Ti substrate as well as tissue culture plastic. For this purpose, the human osteoblasts (MG-63 and primary osteoblasts) were seeded onto the surfaces for 24 h. The relative cell viability was determined by colorimetric measurements of the cell metabolism and relativized to the density of cells quantified using crystal violet staining. The calcium ion dynamic of osteoblasts was evaluated by the calcium imaging analysis of fluo-3 stained vital cells using a confocal laser scanning microscope. The positively charged nano PPAAm-layer resulted in enhanced intracellular calcium ion mobilization after ATP-stimulus and cell viability. This study underlines the importance of the calcium signaling for the manifestation of the cell physiology. Conclusions Our current work provides new insights into the intracellular calcium dynamic caused by diverse chemical surface compositions. The calcium ion dynamic appears to be a sensitive parameter for the cell physiology and, thus, may represent a useful approach for evaluating a new biomaterial. In this regard, reliable in vitro-tests of cell behavior at the interface to a material are crucial steps in securing the success of a new biomaterial in medicine.
Collapse
Affiliation(s)
- Susanne Staehlke
- Dept. of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057 Rostock, Germany
| | - Henrike Rebl
- Dept. of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057 Rostock, Germany
| | - Birgit Finke
- 2Leibniz-Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany
| | - Petra Mueller
- Dept. of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057 Rostock, Germany
| | - Martina Gruening
- Dept. of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057 Rostock, Germany
| | - J Barbara Nebe
- Dept. of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057 Rostock, Germany
| |
Collapse
|
9
|
|
10
|
Rapamycin/sodium hyaluronate binding on nano-hydroxyapatite coated titanium surface improves MC3T3-E1 osteogenesis. PLoS One 2017; 12:e0171693. [PMID: 28182765 PMCID: PMC5300161 DOI: 10.1371/journal.pone.0171693] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 01/23/2017] [Indexed: 11/19/2022] Open
Abstract
Endosseous titanium (Ti) implant failure due to poor biocompatibility of implant surface remains a major problem for osseointegration. Improving the topography of Ti surface may enhance osseointegration, however, the mechanism remains unknown. To investigate the effect of modified Ti surface on osteogenesis, we loaded rapamycin (RA) onto nano-hydroxyapatite (HAp) coated Ti surface which was acid-etched, alkali-heated and HAp coated sequentially. Sodium hyaluronate (SH) was employed as an intermediate layer for the load of RA, and a steady release rate of RA was maintained. Cell vitality of MC3T3-E1 was assessed by MTT. Osteogenesis of MC3T3-E1 on this modified Ti surface was evaluated by alkaline phosphatase (ALP) activity, mineralization and related osteogenesis genes osteocalcin (OCN), osteopontin (OPN), Collagen-I and Runx2. The result revealed that RA/SH-loaded nano-HAp Ti surface was innocent for cell vitality and even more beneficial for cell osteogenesis in vitro. Furthermore, osteogenesis of MC3T3-E1 showed significant association with the mammalian target of rapamycin (mTOR) phosphorylation by RA, which required further study about the mechanism. The approach to this modified Ti surface presented in this paper has high research value for the development of Ti-based implant.
Collapse
|
11
|
Pramono S, Pugdee K, Suwanprateep J, Koontongkaew S. Sandblasting and fibronectin-derived peptide immobilization on titanium surface increase adhesion and differentiation of osteoblast-like cells (MC3T3-E1). J Dent Sci 2016; 11:427-436. [PMID: 30895008 PMCID: PMC6395237 DOI: 10.1016/j.jds.2016.07.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 07/19/2016] [Indexed: 11/23/2022] Open
Abstract
Background/purpose Various chemical titanium (Ti) surface modifications have been reported for enhancing cellular activities that promote early osseointegration. The purpose of this study was to determine if sandblasted Ti coated with or without fibronectin (FN) or FN-derived peptides stimulated osteoblast-like cell adhesion, spreading, proliferation, and differentiation. Materials and methods Osteoblast-like cells (MC3T3-E1) were cultured on sandblasted Ti disks immobilized with FN or FN-derived peptides [GRGDSP (Gly-Arg-Gly-Asp-Ser), PHSRN (Pro-His-Ser-Arg-Asn), or GRGDSP/PHSRN]. Surface topography, cell morphology, cell adhesion, cell proliferation, analysis of osteogenesis-related genes and protein expression, alkaline phosphatase, and alizarin red staining of mineralization were evaluated. Results The sandblasted Ti coated with FN or FN-derived peptides enhanced cell adhesion and cell proliferation. However, the Ti coated with FN or FN-derived peptides groups were similar in cell spreading. Osteogenic differentiation was observed in the peptide-modified Ti surface groups, compared with that of the noncoated Ti group. FN and GRGDSP/PHSRN coating enhanced the gene and protein expression of Runx2, osteocalcin, and bone sialoprotein. Alkaline phosphatase activity and matrix mineralization were also markedly enhanced in the Ti coated groups. Conclusion The sandblasted Ti coated with FN or FN-derived peptides (GRGDSP/PHSRN) markedly enhance adhesion, proliferation, and differentiation of osteoblast-like cells compared with uncoated sandblasted Ti.
Collapse
Affiliation(s)
- Samdharu Pramono
- Faculty of Dentistry, Thammasat University, Patholyothin Road, Klongluang, Prathumtani 12121, Thailand.,Department of Prosthodontics, Faculty of Dentistry, Trisakti University, Jakarta, Indonesia
| | - Kamolparn Pugdee
- Faculty of Dentistry, Thammasat University, Patholyothin Road, Klongluang, Prathumtani 12121, Thailand
| | - Jintamai Suwanprateep
- Biomedical Engineering Research Unit, National Metal and Materials Technology Center, Ministry of Science and Technology, Patholyothin Road, Klongluang, Prathumtani 12121, Thailand
| | - Sittichai Koontongkaew
- Faculty of Dentistry, Thammasat University, Patholyothin Road, Klongluang, Prathumtani 12121, Thailand
| |
Collapse
|
12
|
Alhilou A, Do T, Mizban L, Clarkson BH, Wood DJ, Katsikogianni MG. Physicochemical and Antibacterial Characterization of a Novel Fluorapatite Coating. ACS OMEGA 2016; 1:264-276. [PMID: 27656690 PMCID: PMC5026462 DOI: 10.1021/acsomega.6b00080] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
Peri-implantitis remains the major impediment to the long-term use of dental implants. With increasing concern over the growth in antibiotic resistance, there is considerable interest in the preparation of antimicrobial dental implant coatings that also induce osseointegration. One such potential coating material is fluorapatite (FA). The aim of this study was to relate the antibacterial effectiveness of FA coatings against pathogens implicated in peri-implantitis to the physicochemical properties of the coating. Ordered and disordered FA coatings were produced on the under and upper surfaces of stainless steel (SS) discs, respectively, using a hydrothermal method. Surface charge, surface roughness, wettability, and fluoride release were measured for each coating. Surface chemistry was assessed using X-ray photoelectron spectroscopy and FA crystallinity using X-ray diffraction. Antibacterial activity against periodontopathogens was assessed in vitro using viable counts, confocal microscopy, and scanning electron microscopy (SEM). SEM showed that the hydrothermal method produced FA coatings that were predominately aligned perpendicular to the SS substrate or disordered FA coatings consisting of randomly aligned rodlike crystals. Both FA coatings significantly reduced the growth of all examined bacterial strains in comparison to the control. The FA coatings, especially the disordered ones, presented significantly lower charge, greater roughness, and higher area when compared to the control, enhancing bacteria-material interactions and therefore bacterial deactivation by fluoride ions. The ordered FA layer reduced not only bacterial viability but adhesion too. The ordered FA crystals produced as a potential novel implant coating showed significant antibacterial activity against bacteria implicated in peri-implantitis, which could be explained by a detailed understanding of their physicochemical properties.
Collapse
Affiliation(s)
- Ahmed Alhilou
- Biomaterials
and Tissue Engineering Research Group and Microbiology and Cell Biology Research
Group, School of Dentistry, University of
Leeds, Clarendon Way, Leeds LS2 9LU, West Yorkshire, U.K.
| | - Thuy Do
- Biomaterials
and Tissue Engineering Research Group and Microbiology and Cell Biology Research
Group, School of Dentistry, University of
Leeds, Clarendon Way, Leeds LS2 9LU, West Yorkshire, U.K.
| | - Laith Mizban
- Biomaterials
and Tissue Engineering Research Group and Microbiology and Cell Biology Research
Group, School of Dentistry, University of
Leeds, Clarendon Way, Leeds LS2 9LU, West Yorkshire, U.K.
| | - Brian H. Clarkson
- Cariology,
Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor 48109-1078, United States
| | - David J. Wood
- Biomaterials
and Tissue Engineering Research Group and Microbiology and Cell Biology Research
Group, School of Dentistry, University of
Leeds, Clarendon Way, Leeds LS2 9LU, West Yorkshire, U.K.
| | - Maria G. Katsikogianni
- Biomaterials
and Tissue Engineering Research Group and Microbiology and Cell Biology Research
Group, School of Dentistry, University of
Leeds, Clarendon Way, Leeds LS2 9LU, West Yorkshire, U.K.
- Advanced
Materials Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, U.K.
| |
Collapse
|
13
|
Growth Factors in Bone Marrow Blood of the Mandible With Application of Extracorporeal Shock Wave Therapy. IMPLANT DENT 2016; 25:606-12. [PMID: 27504532 DOI: 10.1097/id.0000000000000452] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Enhancement of bone regeneration is crucial to dental implantology. Growth factors play a significant role during osteogenesis and angiogenesis. Extracorporeal shock wave therapy (ESWT) enhances bone healing; however, no studies have yet been performed in oral implantology. MATERIALS AND METHODS Twenty patients who underwent bilateral mandibular wisdom tooth removal were included. ESWT was applied to 1 side of the jaw. Blood samples were collected from the peripheral vein (PB), mandibular bone marrow without and with ESWT (BM-/+SW). Quantity and quality of the growth factors bone morphogenetic protein (BMP)-2, BMP-4, insulin-like growth factor 1 (IGF-1), vascular endothelial growth factor (VEGF), and transforming growth factor-beta (TGF-β) were investigated via ELISA and cell proliferation assay. RESULTS ELISA revealed superior amounts of IGF-1 and VEGF in BM-/+SW compared to PB (P < 0.05). TGF-β demonstrated no variance. Levels of BMP-2 and BMP-4 were too low for adequate detection in the ELISA. No difference was noticed upon ESWT. The cell proliferation assay did not identify any changes comparing PB versus BM-SW versus BM + SW. CONCLUSION IGF-1 and VEGF are present at higher levels in mandibular bone marrow than in peripheral blood (PB). This study did not identify any benefits of extracorporeal shock wave therapy to increase the investigated growth factors.
Collapse
|
14
|
Li X, Wu F, Zhang Y, Yang J, Shinohara A, Kagami H. Discontinuation of simvastatin leads to a rebound phenomenon and results in immediate peri-implant bone loss. Clin Exp Dent Res 2016; 2:65-72. [PMID: 29744151 PMCID: PMC5839186 DOI: 10.1002/cre2.23] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/14/2016] [Accepted: 01/26/2016] [Indexed: 12/20/2022] Open
Abstract
Although administration of simvastatin has been reported to promote bone formation, the effect of short-term simvastatin administration is not well known. Following implant installation, 10-week-old male Wistar rats (n = 24) were divided into two groups randomly. The experimental group received 10 mg/kg of simvastatin daily for seven days. Then simvastatin administration was discontinued, and the animals were observed up to 28 days. Animals in the control group underwent the same procedure but received saline instead of simvastatin. All animals were analyzed by micro-computed tomography. Samples at days 14 and 21 were subjected to histological analyses. After seven days of simvastatin administration, more new bone formation around the implant was observed in the simvastatin group compared with the control group. Seven days after simvastatin discontinuation, however, the amount of peri-implant trabecular bone began to decrease. Results from morphometric analysis also showed a reduction in new bone area after day 7, which was lowest at day 14. These results were confirmed by histological analyses. In contrast, both the peri-implant trabecular bone and new bone area were maintained in the control group. Short-term administration of simvastatin may affect implant stability owing to a rebound phenomenon and an immediate loss of peri-implant bone.
Collapse
Affiliation(s)
- Xianqi Li
- Department of Hard Tissue Research, Institute for Oral ScienceMatsumoto Dental UniversityShiojiriJapan
- School of DentistryShanxi Medical UniversityTaiyuanChina
| | - Feng Wu
- School of DentistryShanxi Medical UniversityTaiyuanChina
| | - Yiming Zhang
- Center of Health‐Care in StomatologyTenth People's Hospital of Tongji UniversityShanghaiChina
| | - Jing Yang
- Department of Oral Health Promotion, Institute for Oral ScienceMatsumoto Dental UniversityShiojiriJapan
| | - Atsushi Shinohara
- Department of Hard Tissue Research, Institute for Oral ScienceMatsumoto Dental UniversityShiojiriJapan
- Department of Oral and Maxillofacial Surgery, School of DentistryMatsumoto Dental UniversityShiojiriJapan
| | - Hideaki Kagami
- Department of Hard Tissue Research, Institute for Oral ScienceMatsumoto Dental UniversityShiojiriJapan
- Department of Oral and Maxillofacial Surgery, School of DentistryMatsumoto Dental UniversityShiojiriJapan
| |
Collapse
|
15
|
Hao J, Cheng KCK, Kruger LG, Larsson L, Sugai JV, Lahann J, Giannobile WV. Multigrowth Factor Delivery via Immobilization of Gene Therapy Vectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:3145-3151. [PMID: 26919685 PMCID: PMC5687504 DOI: 10.1002/adma.201600027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Indexed: 05/29/2023]
Abstract
Molecules can be immobilized onto biomaterials by a chemical vapor deposition (CVD) coating strategy. Pentafluorophenolester groups react with amine side chains on antibodies, which can selectively immobilize adenoviral vectors for gene delivery of growth factors. These vectors can produce functional proteins within defined regions of biomaterials to produce customizable structures for targeted tissue regeneration.
Collapse
Affiliation(s)
- Jie Hao
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Kenneth C K Cheng
- Biointerfaces Institute, Department of Materials Science and Engineering, B26-115S NCRC, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI, 48109-2800, USA
| | - Laura G Kruger
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Lena Larsson
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
- Department of Periodontology, Institute of Odontology, Medicinaregatan 12F, 6th Floor, University of Gothenburg, SE-405 30 Gothenburg, Sweden
| | - James V Sugai
- Periodontics and Oral Medicine, School of Dentistry, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| | - Joerg Lahann
- Biointerfaces Institute, Department of Chemical Engineering, Materials Science and Engineering, Biomedical Engineering, Macromolecular Science and Engineering, B10-A175 NCRC, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI, 48109-2800, USA
| | - William V Giannobile
- Department of Periodontics and Oral Medicine and Department of Biomedical Engineering, University of Michigan, 1011 North University Avenue, Ann Arbor, MI, 48109-1078, USA
| |
Collapse
|
16
|
Shuto T, Nakatani T, Okamoto K, Saizaki N, Mimura S, Kunitsugu S, Nikawa H. Differentiation of Osteoblast and Osteoclast Cells on Hydrogenated-Tetrahedral Amorphous Carbon Coated Titanium. J PHOTOPOLYM SCI TEC 2016. [DOI: 10.2494/photopolymer.29.413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
17
|
Abstract
Dental implants restore function to near normal in partially or completely edentulous patients. A root-form implant is the most frequently used type of dental implant today. The basis for dental implants is osseointegration, in which osteoblasts grow and directly integrate with the surface of titanium posts surgically embedded into the jaw. Radiologic assessment is critical in the preoperative evaluation of the dental implant patient, as the exact height, width, and contour of the alveolar ridge must be determined. Moreover, the precise locations of the maxillary sinuses and mandibular canals, as well as their relationships to the site of implant surgery must be ascertained. As such, radiologists must be familiar with implant design and surgical placement, as well as augmentation procedures utilized in those patients with insufficient bone in the maxilla and mandible to support dental implants.
Collapse
Affiliation(s)
- Vahe M Zohrabian
- Department of Diagnostic Radiology, Yale School of Medicine, New Haven, CT; Yale-New Haven Hospital, New Haven, CT.
| | - Michael Sonick
- Department of Diagnostic Radiology, Yale School of Medicine, New Haven, CT; Yale-New Haven Hospital, New Haven, CT
| | - Debby Hwang
- Department of Diagnostic Radiology, Yale School of Medicine, New Haven, CT; Yale-New Haven Hospital, New Haven, CT
| | - James J Abrahams
- Department of Diagnostic Radiology, Yale School of Medicine, New Haven, CT; Yale-New Haven Hospital, New Haven, CT
| |
Collapse
|
18
|
Albertini M, Fernandez-Yague M, Lázaro P, Herrero-Climent M, Rios-Santos JV, Bullon P, Gil FJ. Advances in surfaces and osseointegration in implantology. Biomimetic surfaces. Med Oral Patol Oral Cir Bucal 2015; 20:e316-25. [PMID: 25662555 PMCID: PMC4464919 DOI: 10.4317/medoral.20353] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 12/04/2014] [Indexed: 11/18/2022] Open
Abstract
The present work is a revision of the processes occurring in osseointegration of titanium dental implants according to different types of surfaces -namely, polished surfaces, rough surfaces obtained from subtraction methods, as well as the new hydroxyapatite biomimetic surfaces obtained from thermochemical processes. Hydroxyapatite’s high plasma-projection temperatures have proven to prevent the formation of crystalline apatite on the titanium dental implant, but lead to the formation of amorphous calcium phosphate (i.e., with no crystal structure) instead. This layer produce some osseointegration yet the calcium phosphate layer will eventually dissolve and leave a gap between the bone and the dental implant, thus leading to osseointegration failure due to bacterial colonization. A new surface -recently obtained by thermochemical processes- produces, by crystallization, a layer of apatite with the same mineral content as human bone that is chemically bonded to the titanium surface. Osseointegration speed was tested by means of minipigs, showing bone formation after 3 to 4 weeks, with the security that a dental implant can be loaded. This surface can be an excellent candidate for immediate or early loading procedures.
Key words:Dental implants, implants surfaces, osseointegration, biomimetics surfaces.
Collapse
|
19
|
Surface Characterization and In Vivo Evaluation of Dual Acid-Etched and Grit-Blasted/Acid-Etched Implants in Sheep. IMPLANT DENT 2015; 24:256-62. [DOI: 10.1097/id.0000000000000248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
20
|
Morra M, Giavaresi G, Sartori M, Ferrari A, Parrilli A, Bollati D, Baena RRY, Cassinelli C, Fini M. Surface chemistry and effects on bone regeneration of a novel biomimetic synthetic bone filler. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:159. [PMID: 25786396 PMCID: PMC4365274 DOI: 10.1007/s10856-015-5483-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 02/09/2015] [Indexed: 06/04/2023]
Abstract
The paper presents results of physico-chemical and biological investigations of a surface-engineered synthetic bone filler. Surface analysis confirms that the ceramic phosphate granules present a collagen nanolayer to the surrounding environment. Cell cultures tests show that, in agreement with literature reports, surface-immobilized collagen molecular cues can stimulate progression along the osteogenic pathway of undifferentiated human mesenchymal cells. Finally, in vivo test in a rabbit model of critical bone defects shows statistically significant increase of bone volume and mineral apposition rate between the biomimetic bone filler and collagen-free control. All together, obtained data confirm that biomolecular surface engineering can upgrade the properties of implant device, by promoting more specific and targeted implant-host cells interactions.
Collapse
Affiliation(s)
- Marco Morra
- Nobil Bio Ricerche Srl, Via Valcastellana 26, 14037 Portacomaro, AT Italy
| | - Gianluca Giavaresi
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department-Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
- Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Maria Sartori
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department-Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Andrea Ferrari
- Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Annapaola Parrilli
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department-Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Daniele Bollati
- Nobil Bio Ricerche Srl, Via Valcastellana 26, 14037 Portacomaro, AT Italy
| | - Ruggero Rodriguez Y. Baena
- Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, School of Dentistry, University of Pavia, Viale Brambilla 74, 27100 Pavia, Italy
| | - Clara Cassinelli
- Nobil Bio Ricerche Srl, Via Valcastellana 26, 14037 Portacomaro, AT Italy
| | - Milena Fini
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department-Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
- Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| |
Collapse
|
21
|
Nakatani T, Shiraishi K, Kunitsugu S. Development of New Hydrogen-containing Tetrahydral Amorphous Carbon Thin Films using Cathodic Arc Plasma for Dental Implant. J PHOTOPOLYM SCI TEC 2015. [DOI: 10.2494/photopolymer.28.471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
22
|
Abraham CM. A brief historical perspective on dental implants, their surface coatings and treatments. Open Dent J 2014; 8:50-5. [PMID: 24894638 PMCID: PMC4040928 DOI: 10.2174/1874210601408010050] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 01/27/2014] [Accepted: 02/12/2014] [Indexed: 11/22/2022] Open
Abstract
This review highlights a brief, chronological sequence of the history of dental implants. This historical perspective begins with ancient civilizations and spotlights predominant dentists and their contributions to implant development through time. The physical, chemical and biologic properties of various dental implant surfaces and coatings are discussed, and specific surface treatments include an overview of machined implants, etched implants, and sand-blasted implants. Dental implant coatings such as hydroxyapatite, fluoride, and statin usage are further reviewed.
Collapse
Affiliation(s)
- Celeste M Abraham
- Texas A and M University Health Science Center, Baylor College of Dentistry, Department of Periodontics, 3302 Gaston Avenue, Room 142, Dallas, Texas, 75246
| |
Collapse
|
23
|
Park IP, Kang TJ, Heo SJ, Koak JY, Kim JH, Lee JH, Lee SJ, Kim SK. Investigation of anodized titanium implants coated with triterpenoids extracted from black cohosh: an animal study. J Adv Prosthodont 2014; 6:14-21. [PMID: 24605201 PMCID: PMC3942522 DOI: 10.4047/jap.2014.6.1.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 12/10/2013] [Accepted: 12/25/2013] [Indexed: 11/23/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate bone response to anodized titanium implants coated with the extract of black cohosh, Asarum Sieboldii, and pharbitis semen. MATERIALS AND METHODS Forty anodized titanium implants were prepared as follows: group 1 was for control; group 2 were implants soaked in a solution containing triterpenoids extracted from black cohosh for 24 hours; group 3 were implants soaked in a solution containing extracts of black cohosh and Asarum Sieboldii for 24 hours; group 4 were implants soaked in a solution containing extracts of pharbitis semen for 24 hours. The implants from these groups were randomly and surgically implanted into the tibiae of ten rabbits. After 1, 2, and 4 weeks of healing, the nondecalcified ground sections were subjected to histological observation, and the percentage of bone-to-implant contact (BIC%) was calculated. RESULTS All groups exhibited good bone healing with the bone tissue in direct contact with the surface of the implant. Group 2 (52.44 ± 10.98, 25.54 ± 5.56) showed a significantly greater BIC% compared to that of group 3 (45.34 ± 5.00, 22.24 ± 2.20) with respect to the four consecutive threads and total length, respectively. The BIC% of group 1 (25.22 ± 6.00) was significantly greater than that of group 3 (22.24 ± 2.20) only for total length. CONCLUSION This study did not show any remarkable effects of the extract of black coshosh and the other natural products on osseointegration of anodized titanium implants as coating agents. Further studies about the application method of the natural products on to the surface of implants are required.
Collapse
Affiliation(s)
- In-Phill Park
- Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Tae-Joo Kang
- Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Seong-Joo Heo
- Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Jai-Young Koak
- Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Ju-Han Kim
- Department of Oriental Medicinal Materials & Processing, College of Life Sciences, KyungHee University, Seoul, Republic of Korea
| | - Joo-Hee Lee
- Department of Prosthodontics, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Republic of Korea
| | - Shin-Jae Lee
- Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Seong-Kyun Kim
- Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| |
Collapse
|
24
|
Galli S, Naito Y, Karlsson J, He W, Andersson M, Wennerberg A, Jimbo R. Osteoconductive Potential of Mesoporous Titania Implant Surfaces Loaded with Magnesium: An Experimental Study in the Rabbit. Clin Implant Dent Relat Res 2014; 17:1048-59. [PMID: 25178845 DOI: 10.1111/cid.12211] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mesoporous coatings enable incorporation of functional substances and sustainedly release them at the implant site. One bioactive substance that can be incorporated in mesoporous is magnesium, which is strongly involved in bone metabolism and in osteoblast interaction. PURPOSE The aim of this experimental study was to evaluate the effect of incorporation of magnesium into mesoporous coatings of oral implants on early stages of osseointegration. MATERIAL AND METHODS Titanium implants were coated with thin films of mesoporous TiO2 having pore diameters of 6 nm and were loaded with magnesium. The implant surfaces were extensively characterized by means of interferometry, atomic force microscopy, scanning electron microscopy, and energy-dispersive spectroscopy and then placed in the tibiae of 10 rabbits. After 3 weeks of healing, osseointegration was evaluated by means of removal torque testing and histology and histomorphometry. RESULTS Histological and biomechanical analyses revealed no side effects and successful osseointegration of the implants. The biomechanical evaluation evidenced a significant effect of magnesium doping on strengthening the implant-bone interface. CONCLUSIONS A local release of magnesium from the implant surfaces enhances implant retention at the early stage of healing (3 weeks after implantation), which is highly desirable for early loading of the implant.
Collapse
Affiliation(s)
- Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Yoshihito Naito
- Department of Oral and Maxillofacial Prosthodontics and Oral Implantology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Johan Karlsson
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Wenxiao He
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Martin Andersson
- Applied Surface Chemistry Research Group, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| |
Collapse
|
25
|
|
26
|
Kim YJ, Jin YH, Salieb-Beugelaar GB, Nam CH, Stieglitz T. Genetically engineered bacteriophage delivers a tumor necrosis factor alpha antagonist coating on neural electrodes. Biomed Mater 2014; 9:015009. [PMID: 24448635 DOI: 10.1088/1748-6041/9/1/015009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This paper reports a novel approach for the formation of anti-inflammatory surface coating on a neural electrode. The surface coating is realized using a recombinant f88 filamentous bacteriophage, which displays a short platinum binding motif and a tumor necrosis factor alpha antagonist (TNF-α antagonist) on p3 and p8 proteins, respectively. The recombinant bacteriophages are immobilized on the platinum surface by a simple dip coating process. The selective and stable immobilization of bacteriophages on a platinum electrode is confirmed by quartz crystal microbalance with dissipation monitoring, atomic force microscope and fluorescence microscope. From the in vitro cell viability test, the inflammatory cytokine (TNF-α) induced cell death was prevented by presenting recombinant bacteriophage coating, albeit with no significant cytotoxic effect. It is also observed that the bacteriophage coating does not have critical effects on the electrochemical properties such as impedance and charge storage capacities. Thus, this approach demonstrates a promising anti-apoptotic as well as anti-inflammatory surface coating for neural implant applications.
Collapse
Affiliation(s)
- Young Jun Kim
- Laboratory of Nanomedicine, Korea Institute of Science and Technology Europe (KIST-Europe) Forschungsgesellschaft mbH, Campus E 7 1, Saarbruecken, Germany
| | | | | | | | | |
Collapse
|
27
|
Mine Y, Nakatani T, Okamoto K, Hara S, Takagi K, Nikawa H. Impact of Biomimetic Diamond-like Carbon coated Titanium on Osteoblast and Osteoclast Differentiation in vitro. J PHOTOPOLYM SCI TEC 2014. [DOI: 10.2494/photopolymer.27.373] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
28
|
Zuffetti F, Testori T, Capelli M, Rossi MC, Del Fabbro M. The topical administration of bisphosphonates in implant surgery: a randomized split-mouth prospective study with a follow-up up to 5 years. Clin Implant Dent Relat Res 2013; 17 Suppl 1:e168-76. [PMID: 24107257 DOI: 10.1111/cid.12151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To evaluate the efficacy of the topical administration of bisphosphonates in implant therapy. MATERIALS AND METHODS Thirty-nine consecutive patients were selected for a split-mouth study. Inclusion criteria were: presence of a bilateral or total edentulism, ability to tolerate conventional implant procedures, older than 18 years. Ten patients were smokers. Ten patients were fully edentulous in both maxilla and mandible, 12 patients had fully edentulous maxilla or mandible, and 17 were bilaterally partially edentulous (9 in the mandible and 8 in the maxilla). A one-stage procedure was adopted in all cases. The prosthetic phase started 10 weeks after implant insertion. Each patient received implants on the control side and the test side, with insertion performed in the conventional way on the control side; on the test side, a 3% clodronate solution mixed with a surfactant (Tween-20) at a 1:3 ratio was topically administered both at the implant surface and at the implant site. RESULTS One hundred fifty-five implants were inserted. The test and control groups included 75 and 80 implants, respectively. The implant insertion torque was no less than 30 Ncm. A total of 7 implants failed in the control group (6 before loading and one after 12 months of loading). No failure occurred on the test side. By the 5-year follow-up, no further implant failure had been recorded. Overall, implant survival rates at 5 years for the test and control groups were, respectively, 100% and 91.3%, the difference being significant (p < .01). Mean marginal bone loss was 0.85 ± 0.71 mm in the test group and 1.12 ± 0.85 mm in the control group after 1 year of loading and stable thereafter. The difference was not significant. CONCLUSIONS The topical administration of bisphosphonates may positively affect implant survival in the preloading and postloading phases in partially and fully edentulous patients. However, a larger study population is needed to verify these promising clinical results.
Collapse
Affiliation(s)
- Francesco Zuffetti
- Section of Implant Dentistry and Oral Rehabilitation, Dental Clinic, Department of Biomedical, Surgical and Dental Sciences, IRCCS Galeazzi Orthopedic Institute, University of Milan, Italy
| | | | | | | | | |
Collapse
|
29
|
Li X, Li Y, Peng S, Ye B, Lin W, Hu J. Effect of zinc ions on improving implant fixation in osteoporotic bone. Connect Tissue Res 2013; 54:290-6. [PMID: 23971976 DOI: 10.3109/03008207.2013.813495] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The application of titanium (Ti) and its alloys in tooth restoration and joint replacement for aged patients with unfavorable conditions is gaining popularity. Therefore, strategies aiming at improving the fixation of Ti-based implants are worth investigating. This study was designed to observe whether modification of Ti implants by zinc (Zn) could enhance the fixation capability in osteoporotic bone. Two kinds of implants, hydroxyapatite (HA) coated Ti and Zn-incorporated HA (ZnHA) coated Ti, were inserted into the femoral metaphysis longitudinally in ovariectomized (OVX) rats. Specimens were harvested and subjected to double fluorescence labeling examination at week 6 after surgery. At week 12, samples were evaluated with histomorphometry, micro-CT (μCT) analysis and biomechanical test. Compared to the HA coated implants, ZnHA coating improved mineral apposition rate (MAR) of peri-implant bone, which was revealed by double fluorescence labeling; bone area ratio (BA) and bone-to-implant contact (BIC) were also higher for the latter group by histomorphometry. μCT images suggested that more bone mass was formed around the ZnHA coated implants as compared to the HA coated implants. Biomechanical push-out test showed that the ZnHA coated implants demonstrated higher strength of osseointegration than the HA group. The current study suggested that Zn ions could enhance bone formation and improve implant fixation in OVX rats.
Collapse
Affiliation(s)
- Xudong Li
- State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University , Chengdu , China and
| | | | | | | | | | | |
Collapse
|
30
|
Bougas K, Jimbo R, Vandeweghe S, Hayashi M, Bryington M, Kozai Y, Schwartz-Filho H, Tovar N, Adolfsson E, Ono D, Coelho P, Wennerberg A. Bone apposition to laminin-1 coated implants: histologic and 3D evaluation. Int J Oral Maxillofac Surg 2013; 42:677-82. [DOI: 10.1016/j.ijom.2012.11.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 11/04/2012] [Accepted: 11/08/2012] [Indexed: 01/30/2023]
|
31
|
Luo Q, Huang Y, Deng X, Zhang J, Li X, Zhao S, Li X. Polyelectrolyte multilayer coating with two regulatory molecules on titanium: construction and its biological effects. Nanomedicine (Lond) 2013; 8:739-55. [PMID: 23384699 DOI: 10.2217/nnm.12.151] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: This study aimed at constructing a novel disulfide-crosslinked collagen I/hyaluronic acid polyelectrolyte multilayer (PEM) coating incorporated with bFGF and arginine–glycine–aspartic acid on titanium via the layer-by-layer technique, and evaluating its biological effects. Materials & methods: The surface topography and components, thickness, degradation behaviors and bFGF release profiles of the PEM coating were investigated. The effects of the PEM coating on osteoprogenitor cell growth and bone implant interfacial binding strength in the rabbit femur model were evaluated separately. Results: The formation of disulfide bonds improved the stability of the PEM coating, resulting in a coating that can release bFGF in a slow and sustained manner. Biological evaluations revealed that the resultant PEM coating on titanium promoted various cell behaviors and enhanced the binding strength. Conclusion: The employed cotreatment regimen enabled bFGF and arginine–glycine–aspartic acid to have a synergistic effect on the cell responses, which, in turn, improved the osseointegration. Original submitted 26 January 2012; Revised submitted 10 June 2012; Published online 5 February 2013
Collapse
Affiliation(s)
- Qiaojie Luo
- Department of Oral & Maxillofacial Surgery, The Affiliated Stomatology Hospital, College of Medicine, Zhejiang University, 395 Yan’an Road, Hangzhou 310006, China
| | - Ying Huang
- Department of Oral & Maxillofacial Surgery, The Affiliated Stomatology Hospital, College of Medicine, Zhejiang University, 395 Yan’an Road, Hangzhou 310006, China
| | - Xuliang Deng
- School & Hospital of Stomatology, Peking University, Beijing 100871, China
| | - Jianxiang Zhang
- Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Xiaohui Li
- Department of Pharmaceutics, College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Shifang Zhao
- Department of Oral & Maxillofacial Surgery, The Affiliated Stomatology Hospital, College of Medicine, Zhejiang University, 395 Yan’an Road, Hangzhou 310006, China
| | - Xiaodong Li
- Department of Oral & Maxillofacial Surgery, The Affiliated Stomatology Hospital, College of Medicine, Zhejiang University, 395 Yan’an Road, Hangzhou 310006, China.
| |
Collapse
|
32
|
Ohno M, Kimoto K, Toyoda T, Kawata K, Arakawa H. Fluoride-Treated Bio-Resorbable Synthetic Hydroxyapatite Promotes Proliferation and Differentiation of Human Osteoblastic MG-63 Cells. J ORAL IMPLANTOL 2013; 39:154-60. [DOI: 10.1563/aaid-joi-d-10-00175] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
When resorbable hydroxyapatite (HA) granules, which are used as a bone supplement material, were treated in neutral 4% sodium fluoride (NaF) solution, formation of a reactant resembling calcium fluoride was observed on the surface of the granules. Immediate and slow release of fluoride from fluoridated HA (HA+F) granules was observed after immersion in culture fluid, and the concentration increased over time to 1.25 ± 0.05 ppm F at 0.5 hours, 1.57 ± 0.12 ppm F at 24 hours, and 1.73 ± 0.15 ppm F at 48 hours. On invasion assay, migration of human osteoblast-like MG-63 cells exposed to the released fluoride was confirmed in comparison to the cells incubated with a nonfluoridated control sample (P < .01). In addition, fluoride added to the medium increased MG-63 cell proliferation in a manner dependent on fluoride concentrations up to 2.0 ppm (P < .05). At 5.0 ppm, however, fluoride significantly inhibited cell proliferation (P < .005). Activity of the osteogenic differentiation marker, alkaline phosphatase (ALP), also increased with fluoride after exposure for 1 week, increasing significantly at 1.0 ppm (P < .05). The promotion of MG-63 cell migration and proliferation, as well as increased ALP activity, suggested that fluoride released from the surface of resorbable HA granules, which were fluoridated by prior treatment with neutral 4% NaF solution, can provide a superb method to supply fluoride and promote osteogenic cell differentiation.
Collapse
Affiliation(s)
- Motofumi Ohno
- Division of Oral Health, Department of Health Science, Kanagawa Dental College, Yokosuka, Japan
| | - Kazunari Kimoto
- Division of Oral Health, Department of Health Science, Kanagawa Dental College, Yokosuka, Japan
| | | | - Kazushige Kawata
- Division of Oral Health, Department of Health Science, Kanagawa Dental College, Yokosuka, Japan
| | - Hirohisa Arakawa
- Division of Oral Health, Department of Health Science, Kanagawa Dental College, Yokosuka, Japan
| |
Collapse
|
33
|
Early Bone Healing Around 2 Different Experimental, HA Grit-Blasted, and Dual Acid-Etched Titanium Implant Surfaces. A Pilot Study in Rabbits. IMPLANT DENT 2012; 21:454-60. [DOI: 10.1097/id.0b013e3182611cd7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
34
|
|
35
|
|
36
|
Yu HS, Jin GZ, Won JE, Wall I, Kim HW. Macrochanneled bioactive ceramic scaffolds in combination with collagen hydrogel: a new tool for bone tissue engineering. J Biomed Mater Res A 2012; 100:2431-40. [PMID: 22566478 DOI: 10.1002/jbm.a.34163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 02/01/2012] [Accepted: 02/29/2012] [Indexed: 11/08/2022]
Abstract
New tissue-engineering tool for bone regeneration is described to facilitate homogeneous cell seeding and effective osteogenic development. Calcium phosphate (CaP) scaffolds with macrochanneled and well-defined pore structure was developed, however, a large portion of the cells seeded directly within the scaffold easily penetrates without good adhesion to the scaffold surface. To overcome this, a method was exploited to dispense cells evenly throughout the CaP scaffold using collagen hydrogel. Rat bone marrow-derived mesenchymal stem cells (MSCs) were mixed within a neutralized collagen solution, which was then infiltrated into the macrochanneled pore space and gelled to result in macrochanneled bioceramic scaffold combined with MSCs-hydrogel. MSCs contained within the hydrogel-CaP scaffolds were highly viable, with similar growth pattern to those in the collagen hydrogel. Cells seeded by this approach were initially almost double in number compared with those seeded directly onto the CaP scaffold and had an active proliferation more than 14 days. Assessments of the MSCs showed significantly higher alkaline phosphatase levels in the combined scaffold, which was accompanied by enhanced osteogenesis including the expression of genes [collagen type I, bone sialoprotein, and osteopontin (OPN)] and proteins (OPN and osteocalcin). Extracellular calcium was also elevated significantly in the combined scaffold compared to the CaP scaffold. In addition, mechanical strength of the constructs was improved significantly in the combined scaffold compared to the CaP scaffold. Based on these, the cell culturing and tissue engineering strategy within the macrochanneled bioactive ceramic scaffolds could be improved greatly by the combinatory approach of using collagen hydrogel.
Collapse
Affiliation(s)
- Hye-Sun Yu
- Department of Nanobiomedical Science & WCU Research Center, Dankook University Graduate School, Cheonan 330-714, Korea
| | | | | | | | | |
Collapse
|
37
|
Travan A, Marsich E, Donati I, Foulc MP, Moritz N, Aro HT, Paoletti S. Polysaccharide-Coated Thermosets for Orthopedic Applications: From Material Characterization to In Vivo Tests. Biomacromolecules 2012; 13:1564-72. [DOI: 10.1021/bm3002683] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Andrea Travan
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Eleonora Marsich
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Ivan Donati
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Marie-Pierre Foulc
- Rescoll, Société
de Recherche, 8 Allée Geoffroy Saint-Hilaire,
33615 Pessac, France
| | - Niko Moritz
- Orthopaedic
Research Unit, Department of Orthopaedic Surgery and Traumatology, University of Turku, Kiinamyllynkatu
10, 20520, Turku,
Finland
| | - Hannu T. Aro
- Orthopaedic
Research Unit, Department of Orthopaedic Surgery and Traumatology, University of Turku, Kiinamyllynkatu
10, 20520, Turku,
Finland
| | - Sergio Paoletti
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| |
Collapse
|
38
|
Cao X, Yu WQ, Qiu J, Zhao YF, Zhang YL, Zhang FQ. RGD peptide immobilized on TiO2 nanotubes for increased bone marrow stromal cells adhesion and osteogenic gene expression. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:527-536. [PMID: 22143905 DOI: 10.1007/s10856-011-4479-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
Recently, TiO(2) nanotube layers are widely used in orthopedics and dental applications because of their good promotion effect on bone cells. Furthermore, peptide sequences such as arginine-glycine-aspartic acid are used to modify Ti implant for binding to cell surface integrins through motif. In this study, a cellular adhesive peptide of arginine-glycine-aspartic acid-cysteine (RGDC) was immobilized onto anodized TiO(2) nanotubes on Ti to examine its in vitro responses on rat bone marrow stromal cells (BMSCs). Materials were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy techniques. High-resolution C1s scans suggested the presence of RGDC on the surface and SEM images confirmed the nanotubes were not destroyed after modification. BMSCs adhesion and osteogenic gene expression were detected in TiO(2) nanotube layers with and without RGDC modification by fluorescence microscopy, confocal laser scanning microscopy, SEM, and realtime polymerase chain reaction (Real-time PCR). Results showed that the TiO(2) nanotube layers immobilized with RGDC increased BMSCs adhesion compared to nonfunctionalized nanotubes after 4 h of cultivation. Furthermore, the osteogenic gene expression of BMSCs was dramatically enhanced on the TiO(2) nanotube layers immobilized with RGDC (10 mM) compared to the TiO(2) nanotube layers immobilized with RGDC (1 mM) and non-functionalized anodized Ti. Our results from in vitro study provided evidence that Ti anodized to possess nanotubes and then further functionalized with RGDC should be further studied for the design of better biomedical implant surfaces.
Collapse
Affiliation(s)
- Xin Cao
- Department of Prosthodontics, School of Stomatology and Affiliated Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | | | | | | | | | | |
Collapse
|
39
|
Makihira S, Nikawa H, Shuto T, Nishimura M, Mine Y, Tsuji K, Okamoto K, Sakai Y, Sakai M, Imari N, Iwata S, Takeda M, Suehiro F. Evaluation of trabecular bone formation in a canine model surrounding a dental implant fixture immobilized with an antimicrobial peptide derived from histatin. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:2765-2772. [PMID: 21901371 DOI: 10.1007/s10856-011-4440-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Accepted: 08/26/2011] [Indexed: 05/31/2023]
Abstract
JH8194 induces osteoblast differentiation, although it was originally designed to improve antifungal activity. This suggests that JH8194 is useful for implant treatment. Therefore, the aim of this study was to evaluate the osseointegration capacity of JH8194-modified titanium dental implant fixtures (JH8194-Fi). The implants were randomly implanted into the edentulous ridge of dog mandibles. Healing abutments were inserted immediately after implant placement. Three weeks later, peri-implant bone levels, the first bone-to-implant contact points, and trabecular bone formation surrounding the implants were assessed by histological and digital image analyses based on microcomputed tomography (microCT). The histological analysis revealed an enhancement of mature trabecular bone around the JH8194-Fi compared with untreated fixtures (control-Fi). Similarly, microCT combined with analysis by Zed View™ also showed increased trabecular bone formation surrounding the JH8194-Fi compared with the control-Fi (Student's t-test, P < 0.05). JH8194 may offer an alternative biological modification of titanium surfaces to enhance trabecular bone formation around dental implants, which may contribute to the transient acquirement of osseointegration and the long-term success of implant therapy.
Collapse
Affiliation(s)
- Seicho Makihira
- Department of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Schroeder JE, Mosheiff R. Tissue engineering approaches for bone repair: concepts and evidence. Injury 2011; 42:609-13. [PMID: 21489529 DOI: 10.1016/j.injury.2011.03.029] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Accepted: 03/17/2011] [Indexed: 02/02/2023]
Abstract
Over the last decades, the medical world has advanced dramatically in the understanding of fracture repair. The three components needed for fracture healing are osteoconduction, osteoinduction and osteogenesis. With newly designed scaffolds, ex vivo produced growth factors and isolated stem cells, most of the challenges of critical size bone defects have been resolved in vitro, and in some cases in animal models as well. However, there are still challenges needed to be overcome before these technologies can be fully converted from the bench to the bedside. These technological and biological advancements need to be converted to mass production of affordable products that can be used in every part of the world. Vascularity, full substation of scaffolds by native bone, and bio-safety are the three most critical steps to be challenged before reaching the clinical setting.
Collapse
Affiliation(s)
- Josh E Schroeder
- Orthopedic Surgery Department, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | | |
Collapse
|
41
|
Kämmerer PW, Gabriel M, Al-Nawas B, Scholz T, Kirchmaier CM, Klein MO. Early implant healing: promotion of platelet activation and cytokine release by topographical, chemical and biomimetical titanium surface modifications in vitro. Clin Oral Implants Res 2011; 23:504-10. [DOI: 10.1111/j.1600-0501.2011.02153.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
42
|
Variola F, Brunski J, Orsini G, de Oliveira PT, Wazen R, Nanci A. Nanoscale surface modifications of medically relevant metals: state-of-the art and perspectives. NANOSCALE 2011; 3:335-53. [PMID: 20976359 PMCID: PMC3105323 DOI: 10.1039/c0nr00485e] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Evidence that nanoscale surface properties stimulate and guide various molecular and biological processes at the implant/tissue interface is fostering a new trend in designing implantable metals. Cutting-edge expertise and techniques drawn from widely separated fields, such as nanotechnology, materials engineering and biology, have been advantageously exploited to nanoengineer surfaces in ways that control and direct these processes in predictable manners. In this review, we present and discuss the state-of-the-art of nanotechnology-based approaches currently adopted to modify the surface of metals used for orthopedic and dental applications, and also briefly consider their use in the cardiovascular field. The effects of nanoengineered surfaces on various in vitro molecular and cellular events are firstly discussed. This review also provides an overview of in vivo and clinical studies with nanostructured metallic implants, and addresses the potential influence of nanotopography on biomechanical events at interfaces. Ultimately, the objective of this work is to give the readership a comprehensive picture of the current advances, future developments and challenges in the application of the infinitesimally small to biomedical surface science. We believe that an integrated understanding of the in vitro and particularly of the in vivo behavior is mandatory for the proper exploitation of nanostructured implantable metals and, indeed, of all biomaterials.
Collapse
Affiliation(s)
- Fabio Variola
- Faculty of Engineering, Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, K1N 6N5 (Canada)
- Laboratory for the Study of Calcified Tissues and Biomaterials, Faculté de Médecine Dentaire, Université de Montréal, Montréal, QC, H3C 3J7 (Canada)
| | - John Brunski
- Division of Plastic & Reconstructive Surgery, Department of Surgery PSRL, School of Medicine, Stanford University, 257 Campus Drive Stanford, CA 94305 (USA)
| | - Giovanna Orsini
- Department of Clinical Sciences and Stomatology, University of Marche, Via Tronto 10, 66026 Ancona (Italy)
| | - Paulo Tambasco de Oliveira
- Department of Morphology, Stomatology and Physiology, University of São Paulo, Ribeirão Preto, SP, 14040-904 (Brazil)
| | - Rima Wazen
- Laboratory for the Study of Calcified Tissues and Biomaterials, Faculté de Médecine Dentaire, Université de Montréal, Montréal, QC, H3C 3J7 (Canada)
| | - Antonio Nanci
- Laboratory for the Study of Calcified Tissues and Biomaterials, Faculté de Médecine Dentaire, Université de Montréal, Montréal, QC, H3C 3J7 (Canada)
| |
Collapse
|
43
|
Lee YH, Lee NH, Bhattarai G, Oh YT, Yu MK, Yoo ID, Jhee EC, Yi HK. Enhancement of osteoblast biocompatibility on titanium surface with Terrein treatment. Cell Biochem Funct 2010; 28:678-85. [PMID: 21104936 DOI: 10.1002/cbf.1708] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2010] [Revised: 09/28/2010] [Accepted: 10/01/2010] [Indexed: 12/31/2022]
Abstract
Titanium is biocompatible with bodily tissues. However, the formation of ROS on the titanium surfaces might have negative response of the activity of the surroundings cells. Terrein was isolated from Penicullium sp. 20135 and found to reduce the effects of LPS-induced inflammation. This study examined the role of Terrein on the biocompatibility of titanium to determine if it can help improve osseointegration. MC-3T3 E1 cells were grown on titanium surfaces. The biocompatibility of Terrein was examined by adding it directly to the culture media at the indicated concentration. The cells on the titanium surface produced excessive ROS and decreased the activity of Cu/Zn SOD and Mn SOD. Moreover, the cells had higher activity towards oxidative stress molecules, such as MAPK, FAK and iNOS expression. In addition, MC-3T3 E1 osteoblast-like cells promoted osteoclast differentiation but reduced osteoblast differentiation and mineralization on the titanium surface. Interestingly, the cells given the Terrein treatment showed higher resistance towards oxidative stress through the up-regulation of ERK1/2 and FAK activity but the down-regulation of SAPK/JNK and iNOS activity. Moreover, Terrein promoted osteoblast differentiation and bone mineralization to elevate the activity of ALP, SPARC and down-regulate RANKL expression after blocking NF-κB translocation from the cytosol to the nucleus. In conclusion, the presence of Terrein on titanium surfaces increases osteoblast cell growth without inflammation. Moreover, Terrein, as a putative antioxidant agent, may enhance osseointegration by decreasing the level of ROS and having a potentially synergistic effect on osteoblast differentiation.
Collapse
Affiliation(s)
- Young-Hee Lee
- Department of Oral Biochemistry, School of Dentistry and Institute of Oral Bioscience, BK21 Program, Chonbuk National University, Jeonju, Republic of Korea
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Se-Ho P, Bin SW, Ho KK, Ju SD, Sung-Am C. The effect of water pyrolysis on the removal torque of titanium implant inserted in rabbit tibias. Clin Oral Implants Res 2010; 22:157-64. [PMID: 20678134 DOI: 10.1111/j.1600-0501.2010.01971.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of this study is to examine the effect of oxidation with water pyrolysis (OWP) method on titanium (Ti) implants by comparing the bonding strength between bone and Ti implants that were inserted in the proximal tibia metaphysic of a rabbit for 12 weeks. The removal torque was measured to evaluate the bonding strength for different Ti implants with and without the OWP method. MATERIAL AND METHODS Nine sets of threaded Ti implants (ASTM grade 2) of diameter 3.75 mm and length 5 mm were prepared for the experiment. Each set was composed of four specimens; one was machine-prepared (group D) and the other three were threaded followed by the OWP method at 300°C (group A), 600°C (group B), and 800°C (group C) for 10 min, respectively. Each set was used for each adult rabbit. To eliminate the effect of the sites or the legs, each rabbit received all four implants, two in the left and two in the right leg, inserted in the proximal tibia metaphyses of the left leg, using a fixed block randomization. After 12 weeks, removal torque tests were carried out. RESULTS The mean removal torque for the control group D was 16.19 N cm, while the mean removal torque values for the OWP groups A, B, and C were 26.75, 31.51, and 41.05 N cm, respectively. The removal torques obtained from the OWP groups B and C (showing the rutile oxide structure) were significantly greater than that for the control group by Bonferroni's-corrected Wilcoxon's signed-rank test (P<0.05). CONCLUSION The strongest bonding between bone and group C (OWP method at 800°C) was confirmed by the comparison of removal torques.
Collapse
Affiliation(s)
- Park Se-Ho
- Department of Prosthodontics, College of Dentistry, Kyungpook National University, 188-1 Samduck 2-Ga, Daegu, South Korea
| | | | | | | | | |
Collapse
|
45
|
Luongo G, Oteri G. A Noninterventional Study Documenting Use and Success of Implants With a New Chemically Modified Titanium Surface in Daily Dental Practice. J ORAL IMPLANTOL 2010; 36:305-14. [DOI: 10.1563/aaid-joi-d-09-00069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
A new chemically modified titanium surface, SLActive, has recently been developed. The results obtained in controlled clinical trials indicate that this implant can be safely used and that it offers predictable results. The goal of this noninterventional study was to verify that the success rates of implants used in daily dental practice are comparable to those reported in controlled clinical trials. This study was a prospective, noninterventional study using implants with a chemically modified surface according to the daily dental practice procedures applied by private practitioners. The choice of the implantation procedure and the loading protocol were the responsibility of the investigator and were chosen according to the patient's needs. Thirty clinical centers actively participated in this study, and 226 patients were treated, of which, 8 patients were lost to follow-up. Because of the noninterventional design of the study, the patients were not selected according to strictly defined inclusion/exclusion criteria. Thus, the study included individuals with risk factors such as smoking (24%), untreated gingivitis or periodontitis (9%), and bruxism (6%). The implants were equally distributed between mandible (46%) and maxilla (54%). A bone augmentation procedure was done in 31% of the cases. Early loading (functional loading between 48 hours and 3 months after implant insertion) was applied most frequently (48%), followed by the conventional loading protocol (3 to 6 months after implant placement, 34%). Immediate restoration and immediate loading were rare (7% and 2%, respectively). Of 276 implants inserted and documented, 5 implants failures were reported, all of which were associated with a sinus floor augmentation procedure. The survival rate was 98.2% at the 1-year follow-up visit. The results showed that implants with a chemically modified surface can be successfully restored with success rates similar to those reported in formal clinical trials under more controlled conditions.
Collapse
Affiliation(s)
| | - Giacomo Oteri
- Department of Dentistry, University of Messina, Messina, Italy
| |
Collapse
|
46
|
Hung YC, Pan HA, Tai SM, Huang GS. A nanodevice for rapid modulation of proliferation, apoptosis, invasive ability, and cytoskeletal reorganization in cultured cells. LAB ON A CHIP 2010; 10:1189-1198. [PMID: 20390139 DOI: 10.1039/b921354f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We have fabricated a nanodevice composed of a matrix of nine nanodot arrays with various dot sizes, ranging from a flat surface to 10 nm, 50 nm, 100 nm, and 200 nm arrays. HELA, C33A, ES2, PA-1, TOV-112D, TOV-21G, MG63, and NIH-3T3 cells were seeded onto the device and cultured for three days. To evaluate the size-dependent effect of nanodot arrays on cell growth, indices corresponding to cell proliferation, apoptosis, cell adhesion, and cytoskeletal organization were defined. VD50 is defined as the diameter of nanodots on which 50% of the cell population remains viable. AD50 is defined as the diameter of nanodots on which 50% of the cell population appears to have an apoptosis-like morphology. FD50 is the diameter of nanodots that promotes the formation of 50% of the focal adhesions compared to cells grown on a flat surface. CD50 is defined as the diameter of nanodots on which cells have half the amount of microfilament bundles compared to cells grown on a flat surface. We were able to distinguish between the invasive ability of HELA versus later-staged C33A cells. Ovarian cancer cell lines (ES2, PA-1, TOV-112D, and TOV-21G) also exhibited differential growth parameters that are associated with cell type, grade, and stage. Modulation of the growth of MG63 cells was also achieved. More broadly, we have established a platform that can be used to assess basic parameters of cell growth. A simplified fabrication process ensures mass production and lowers cost. According to our results, the device is capable of distinguishing among cancer cell lines at various stages and also provides basic design parameters for artificial implants. Our device will serve as a convenient and fast tool for tissue engineering and cancer treatment.
Collapse
Affiliation(s)
- Yao-Ching Hung
- Section of Gynecologic Oncology, Department of Obstetrics and Gynecology, China Medical University and Hospital, 91 Hsueh Shih Rd, Taichung, 404, Taiwan, ROC
| | | | | | | |
Collapse
|
47
|
Makihira S, Shuto T, Nikawa H, Okamoto K, Mine Y, Takamoto Y, Ohara M, Tsuji K. Titanium immobilized with an antimicrobial peptide derived from histatin accelerates the differentiation of osteoblastic cell line, MC3T3-E1. Int J Mol Sci 2010; 11:1458-1470. [PMID: 20480030 PMCID: PMC2871126 DOI: 10.3390/ijms11041458] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 03/23/2010] [Accepted: 03/23/2010] [Indexed: 11/16/2022] Open
Abstract
The objective of this study was to evaluate the effect of titanium immobilized with a cationic antimicrobial peptide (JH8194) derived from histatin on the biofilm formation of Porphyromonas gingivalis and differentiation of osteoblastic cells (MC3T3-E1). The titanium specimens (Ti) were immobilized with JH8194, according to the method previously described. The colonization of P. gingivalis on JH8194-Ti was significantly lower than that on control- and blocking-Ti. JH8194-Ti enhanced the mRNA expressions of Runx2 and OPN, and ALPase activity in the MC3T3-E1, as compared with those of control- and blocking-Ti. These results, taken together, suggested the possibility that JH8194-Ti may be a potential aid to shorten the period of acquiring osseointegration.
Collapse
Affiliation(s)
- Seicho Makihira
- Division of Oral Health Sciences, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mails:
(T.S.);
(H.N.);
(Y.M.);
(Y.T.)
- Author to whom correspondence should be addressed; E-Mail:
; Tel.: +81-82-257-5622; Fax: +81-82-257-5797
| | - Takahiro Shuto
- Division of Oral Health Sciences, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mails:
(T.S.);
(H.N.);
(Y.M.);
(Y.T.)
| | - Hiroki Nikawa
- Division of Oral Health Sciences, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mails:
(T.S.);
(H.N.);
(Y.M.);
(Y.T.)
| | - Keishi Okamoto
- Toyo Advanced Technologies Co., LTD. 5-3-38, Ujina-Higashi, Minami-ku, Hiroshima 734-8501, Japan; E-Mail:
(K.O.)
| | - Yuichi Mine
- Division of Oral Health Sciences, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mails:
(T.S.);
(H.N.);
(Y.M.);
(Y.T.)
| | - Yuko Takamoto
- Division of Oral Health Sciences, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mails:
(T.S.);
(H.N.);
(Y.M.);
(Y.T.)
| | - Masaru Ohara
- Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mail:
(M.O.)
| | - Koichiro Tsuji
- Two cell Co. LTD., 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan; E-Mail:
(K.T.)
| |
Collapse
|
48
|
Zhang Y, Xiang Q, Dong S, Li C, Zhou Y. Fabrication and characterization of a recombinant fibronectin/cadherin bio-inspired ceramic surface and its influence on adhesion and ossification in vitro. Acta Biomater 2010; 6:776-85. [PMID: 19703596 DOI: 10.1016/j.actbio.2009.08.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Revised: 08/09/2009] [Accepted: 08/19/2009] [Indexed: 10/20/2022]
Abstract
This study has investigated the effects of a bio-inspired ceramic surface modified with a novel recombinant protein on surface parameters and cell behavior. The surface of a biphasic calcium phosphate ceramic was functionalized with a recombinant protein spanning the fragments of fibronectin module III7-10 and extracellular domains 1 and 2 of cadherin 11 (rFN/CDH) using a dimethyl-3,3'-dithiobispropionimidate cross-linking method. The surface was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and protein adsorption and surface density measurements. The material exhibited desirable properties for cell adhesion and proliferation. The effects of the surface on the adhesion and proliferation of human mesenchymal stem cells (hMSC) were investigated using a cell adhesion centrifugal assay and the 3-(4,5-dmethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method. The data demonstrated that the adhesive capacity and proliferation rate were significantly improved as compared with fibronectin and cadherin positive controls. Moreover, the rFN/CDH bio-inspired ceramic surface also induced osteoblastic differentiation, as evidenced by the higher alkaline phosphatase activity and osteocalcin mRNA expression level of hMSC cultured in osteogenic media for 7-10days. Furthermore, a functional blocking assay with a site-specific antibody against phosphotyrosine 397 (pY397) of focal adhesion kinase revealed that pY397 is involved in adhesion and ossification. These results suggest that the rFN/CDH bio-inspired BCP surface possesses enhanced functionality in adhesion, proliferation and ossification and may be a promising scaffold for tissue engineering.
Collapse
|
49
|
Beyeler M, Schild C, Lutz R, Chiquet M, Trueb B. Identification of a fibronectin interaction site in the extracellular matrix protein ameloblastin. Exp Cell Res 2010; 316:1202-12. [PMID: 20043904 DOI: 10.1016/j.yexcr.2009.12.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 12/11/2009] [Accepted: 12/21/2009] [Indexed: 11/16/2022]
Abstract
Mammalian teeth are composed of hydroxyapatite crystals that are embedded in a rich extracellular matrix. This matrix is produced by only two cell types, the mesenchymal odontoblasts and the ectodermal ameloblasts. Ameloblasts secrete the enamel proteins amelogenin, ameloblastin, enamelin and amelotin. Odontoblasts secrete collagen type I and several calcium-binding phosphoproteins including dentin sialophosphoprotein, dentin matrix protein, bone sialoprotein and osteopontin. The latter four proteins have recently been grouped in the family of the SIBLINGs (small integrin-binding ligand, N-linked glycoproteins) because they display similar gene structures and because they contain an RGD tripeptide sequence that binds to integrin receptors and thus mediates cell adhesion. We have prepared all the other tooth-specific proteins in recombinant form and examined whether they might also promote cell adhesion similar to the SIBLINGs. We found that only ameloblastin consistently mediated adhesion of osteoblastic and fibroblastic cells to plastic or titanium surfaces. The activity was dependent on the intact three-dimensional structure of ameloblastin and required de novo protein synthesis of the adhering cells. By deletion analysis and in vitro mutagenesis, the active site could be narrowed down to a sequence of 13 amino acid residues (VPIMDFADPQFPT) derived from exon 7 of the rat ameloblastin gene or exons 7-9 of the human gene. Kinetic studies and RNA interference experiments further demonstrated that this sequence does not directly bind to a cell surface receptor but that it interacts with cellular fibronectin, which in turn binds to integrin receptors. The identification of a fibronectin-binding domain in ameloblastin might permit interesting applications for dental implantology. Implants could be coated with peptides containing the active sequence, which in turn would recruit fibronectin from the patient's blood. The recruited fibronectin should then promote cell adhesion on the implant surface, thereby accelerating osseointegration of the implant.
Collapse
Affiliation(s)
- Michael Beyeler
- Department of Clinical Research, University of Bern, Bern, Switzerland
| | | | | | | | | |
Collapse
|