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De Stefano M, Singh K, Raina A, Mohan S, Ul Haq MI, Ruggiero A. Tribocorrosion of 3D printed dental implants: An overview. J Taibah Univ Med Sci 2024; 19:644-663. [PMID: 38807965 PMCID: PMC11131088 DOI: 10.1016/j.jtumed.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/30/2024] [Accepted: 05/03/2024] [Indexed: 05/30/2024] Open
Abstract
With the advancements in dental science and the growing need for improved dental health, it has become imperative to develop new implant materials which possess better geometrical, mechanical, and physical properties. The oral environment is a corrosive environment and the relative motion between the teeth also makes the environment more hostile. Therefore, the combined corrosion and tribology commonly known as tribocorrosion of implants needs to be studied. The complex shapes of the dental implants and the high-performance requirements of these implants make manufacturing difficult by conventional manufacturing processes. With the advent of additive manufacturing or 3D-printing, the development of implants has become easy. However, the various requirements such as surface roughness, mechanical strength, and corrosion resistance further make the manufacturing of implants difficult. The current paper reviews the various studies related to3D-printed implants. Also, the paper tries to highlight the role of 3D-Printing can play in the area of dental implants. Further studies both experimental and numerical are needed to devise optimized conditions for 3D-printing implants to develop implants with improved mechanical, corrosion, and biological properties.
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Affiliation(s)
- Marco De Stefano
- Department of Industrial Engineering, University of Salerno, Fisciano, Italy
| | - Khushneet Singh
- School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Ankush Raina
- School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Sanjay Mohan
- School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Mir Irfan Ul Haq
- School of Mechanical Engineering, Shri Mata Vaishno Devi University, Katra, Jammu and Kashmir, India
| | - Alessandro Ruggiero
- Department of Industrial Engineering, University of Salerno, Fisciano, Italy
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2
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Drakou A, Sioutis S, Zafeiris I, Soucacos F, Karampikas V, Tsatsaragkou A, Mavrogenis AF, Koulalis D. Sucralfate Prevents Pin Site Infections of External Fixators in Open Tibia Fractures. J Long Term Eff Med Implants 2024; 34:1-7. [PMID: 37938199 DOI: 10.1615/jlongtermeffmedimplants.2023044966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Pin site infections are the main complication of external fixators. The most common pathogens are Staphylococcus epidermidis and Staphylococcus aureus. The incidence of pin site infections ranges from 2% to 30%. Until now, no satisfactory prevention strategy exists. Therefore, we performed this study to assess the effect of a sucralfate gel 25% applied around the pins of external fixation systems in trauma patients with open tibia fractures. We prospectively studied two groups of patients with open tibia fractures treated with external fixators. In group A patients, pin site care was performed with the use of normal saline and plain dressings once a day. In group B patients, pin site care was performed with the use of sucralfate gel 25%. The incidence of pin site infections was 33.33% for patients of group A and 16.67% for patients of group B. Patients of group B showed significantly lower rate of pin site infections compared to patients of group A (p-value = 0.032). No patient experienced any complications related to the local application of the drug. Sucralfate significantly prevents pin site infections of external fixators in open tibia fractures. Therefore, it can be used as a preventive antimicrobial agent for pin site infections in patients with external fixators.
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Affiliation(s)
| | - Spyridon Sioutis
- First Department of Orthopaedics, National and Kapodistrian University of Athens, University Medical School, Athens, Greece
| | - Ioannis Zafeiris
- First Department of Orthopaedics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Fotini Soucacos
- First Department of Orthopaedics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Vasileios Karampikas
- First Department of Orthopedics, National and Kapodistrian University of Athens, ATTIKON University General Hospital, Athens, Greece
| | | | - Andreas F Mavrogenis
- First Department of Orthopaedics, National and Kapodistrian University of Athens, School of Medicine, ATTIKON University Hospital, Athens, Greece
| | - Dimitrios Koulalis
- First Department of Orthopaedics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
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3
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Al-Noaman A, Rawlinson SCF. Polyether ether ketone coated with nanohydroxyapatite/graphene oxide composite promotes bioactivity and antibacterial activity at the surface of the material. Eur J Oral Sci 2023; 131:e12946. [PMID: 37528738 DOI: 10.1111/eos.12946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/15/2023] [Indexed: 08/03/2023]
Abstract
Polyether ether ketone (PEEK) is considered an alternative material for manufacturing dental implants. However, PEEK lacks bioactivity and antibacterial action. In a series of experiments designed to enhance the surface properties of PEEK, we present a nanohydroxyapatite (nHA) and graphene oxide (GO) composite as a coating for PEEK-based dental implants to improve biological properties and antibacterial action. PEEK discs were polished, cleaned, and coated with the composite consisting of nHA particles doped with 0.75 wt% graphene oxide by a micro-emulsion technique according to patent US8,206,813. X-ray diffraction, field emission scanning electron microscopy-energy dispersive spectroscopy, and atomic force microscopy were utilized to characterize the composite coating. The wettability of the coated and non-coated samples was assessed by optical contact angle measurement. Antibacterial action of the composite coating was explored against S. aureus and E. coli and cytotoxicity determined utilizing osteoblast-like cells and gingival fibroblasts. The findings showed that the nHA/GO composite coating, approximately 1.3 μm thick, was homogenous with few micro-cracks and adhered to the PEEK surface. The surface roughness was reduced to 21.26 nm and the wettability was improved to 54.6⁰ after coating with the composite coating. Antibacterial activity was moderate, killing 99% of S. aureus and E. coli, with acceptable levels of cytotoxicity to mammalian osteoblast-like cells and gingival fibroblasts.
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Affiliation(s)
- Ahmed Al-Noaman
- Department of Oral Surgery, College of Dentistry, University of Babylon, Babylon City, Iraq
| | - Simon C F Rawlinson
- School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Pushpalatha C, Gayathri V, Sowmya S, Augustine D, Alamoudi A, Zidane B, Hassan Mohammad Albar N, Bhandi S. Nanohydroxyapatite in dentistry: A comprehensive review. Saudi Dent J 2023; 35:741-752. [PMID: 37817794 PMCID: PMC10562112 DOI: 10.1016/j.sdentj.2023.05.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 04/13/2023] [Accepted: 05/19/2023] [Indexed: 10/12/2023] Open
Abstract
Enamel, being the hardest and the highest mineralized tissue of the human body, contains nearly 96% inorganic components and 4% organic compounds and water. Dentin contains 65% inorganic components and 35% organic and water content. The translucency and white appearance of enamel are attributed to Hydroxyapatite (HA), which constitutes the major part of the inorganic component of dental hard tissue. With the advent of nanotechnology, the application of Nanohydroxyapatite (nHA) has piqued interest in dentistry due to its excellent mechanical, physical, and chemical properties. Compared to HA, nHA is found to have superior properties such as increased solubility, high surface energy and better biocompatibility. This is due to the morphological and structural similarity of nanosized hydroxyapatite particles to tooth hydroxyapatite crystals. These nanoparticles have been incorporated into various dental formulations for different applications to ensure comprehensive oral healthcare. To prevent dental caries, several nHA based dentifrices, mouth rinsing solutions and remineralizing pastes have been developed. nHA-based materials, such as nanocomposites, nano impression materials, and nanoceramics, have proven to be very effective in restoring tooth deformities (decay, fracture, and tooth loss). The nHA coating on the surface of the dental implant helps it bind to the bone by forming a biomimetic coating. A recent innovative strategy involves using nHA to reduce dentinal hypersensitivity and to reconstruct periodontal bone defects. The purpose of the present review is to discuss the different applications of nHA in dentistry, especially in preventive and restorative dentistry, dental implantology, bleaching and dentine hypersensitivity management.
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Affiliation(s)
- C. Pushpalatha
- Department of Pedodontics and Preventive Dentistry, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bangalore, India
| | - V.S. Gayathri
- Department of Pedodontics and Preventive Dentistry, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bangalore, India
| | - S.V. Sowmya
- Department of Oral Pathology & Microbiology, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bangalore, India
| | - Dominic Augustine
- Department of Oral Pathology & Microbiology, Faculty of Dental Sciences, M.S. Ramaiah University of Applied Sciences, Bangalore, India
| | - Ahmed Alamoudi
- Oral Biology Department, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Bassam Zidane
- Restorative Dentistry Department, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - Shilpa Bhandi
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UT 84095, USA
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5
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Nguyen AK, Nelson SB, Skoog SA, Jaipan P, Petrochenko PE, Kaiser A, Lo L, Moreno J, Narayan RJ, Goering PL, Kumar G. Effect of simulated body fluid formulation on orthopedic device apatite-forming ability assessment. J Biomed Mater Res B Appl Biomater 2023; 111:987-995. [PMID: 36444900 DOI: 10.1002/jbm.b.35207] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/17/2022] [Accepted: 11/13/2022] [Indexed: 11/30/2022]
Abstract
Integration of native bone into orthopedic devices is a key factor in long-term implant success. The material-tissue interface is generally accepted to consist of a hydroxyapatite layer so bioactive materials that can spontaneously generate this hydroxyapatite layer after implantation may improve patient outcomes. Per the ISO 22317:2014 standard, "Implants for surgery - In vitro evaluation for apatite-forming ability of implant materials," bioactivity performance statements can be assessed by soaking the material in simulated body fluid (SBF) and evaluating the surface for the formation of a hydroxyapatite layer; however, variations in test methods may alter hydroxyapatite formation and result in false-positive assessments. The goal of this study was to identify the effect of SBF formulation on bioactivity assessment. Bioglass® (45S5 and S53P4) and non-bioactive Ti-6Al-4V were exposed to SBF formulations varying in calcium ion and phosphate concentrations as well as supporting ion concentrations. Scanning electron microscopy and X-ray powder diffraction evaluation of the resulting hydroxyapatite layers revealed that SBF enriched with double or quadruple the calcium and phosphate ion concentrations increased hydroxyapatite crystal size and quantity compared to the standard formulation and can induce hydroxyapatite crystallization on surfaces traditionally considered non-bioactive. Altering concentrations of other ions, for example, bicarbonate, changed hydroxyapatite induction time, quantity, and morphology. For studies evaluating the apatite-forming ability of a material to support bioactivity performance statements, test method parameters must be adequately described and controlled. It is unclear if apatite formation after exposure to any of the SBF formulations is representative of an in vivo biological response. The ISO 23317 standard test method should be further developed to provide additional guidance on apatite characterization and interpretation of the results.
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Affiliation(s)
- Alexander K Nguyen
- Joint Department of Biomedical Engineering, UNC/NCSU, Raleigh, North Carolina, USA.,Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Sarah B Nelson
- Office of Product Evaluation and Quality, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Shelby A Skoog
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Panupong Jaipan
- Joint Department of Biomedical Engineering, UNC/NCSU, Raleigh, North Carolina, USA
| | - Peter E Petrochenko
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Aric Kaiser
- Office of Product Evaluation and Quality, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Linh Lo
- Office of Product Evaluation and Quality, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Jose Moreno
- Office of Product Evaluation and Quality, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Roger J Narayan
- Joint Department of Biomedical Engineering, UNC/NCSU, Raleigh, North Carolina, USA
| | - Peter L Goering
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | - Girish Kumar
- Office of Product Evaluation and Quality, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, USA
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Jain S, Ponnada S, Chandrasekhar G. Comparison of Biomechanical Properties of Surface-Treated and Untreated Machined Orthodontic Mini-Implants: An In Vitro Study. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2022. [DOI: 10.1177/03015742221088628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background and Objectives: The use of mini-implants has become more popular, and there has been a heightened focus on factors that contribute to their success. The purpose of the study is to compare the effects of various surface treatment methods of mini-implants on their bone cutting capacity, insertion torque required, and fracture resistance when compared with the untreated machined mini-implants. Materials and Methods: The study included 4 groups. Each group consisted of 10 orthodontic mini-implants (OMIs). The first experimental group contains titanium oxide coated mini-implants, the second group contains grit-blasted implants with aluminum oxide, the third group consists of mini-implants coated with hydroxyapatite crystals, and the control group is formed by untreated machined mini-implants. Each group is evaluated for cutting efficiency, maximum insertion torque, and fracture resistance using a customized torque testing gauge. Results: The results showed that surface treating OMIs with hydroxyapatite particles increases the surface roughness, thereby enhancing their stability without decreasing the bone cutting ability compared with OMIs without surface treatment. Conclusion: Roughened surface of OMIs with hydroxyapatite particles exhibited maximum fracture resistance without decreased corresponding bone cutting efficiency.
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Affiliation(s)
- Shristy Jain
- Department of Orthodontics and Dentofacial Orthopedics, Panineeya Mahavidyalaya Institute of Dental Sciences, Hyderabad, Telangana, India
| | - Swaroopa Ponnada
- Department of Orthodontics and Dentofacial Orthopedics, Panineeya Mahavidyalaya Institute of Dental Sciences, Hyderabad, Telangana, India
| | - Gandikota Chandrasekhar
- Department of Orthodontics and Dentofacial Orthopedics, Panineeya Mahavidyalaya Institute of Dental Sciences, Hyderabad, Telangana, India
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7
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Stoetzel S, Malhan D, Wild U, Helbing C, Hassan F, Attia S, Jandt KD, Heiss C, El Khassawna T. Osteocytes Influence on Bone Matrix Integrity Affects Biomechanical Competence at Bone-Implant Interface of Bioactive-Coated Titanium Implants in Rat Tibiae. Int J Mol Sci 2021; 23:374. [PMID: 35008800 PMCID: PMC8745552 DOI: 10.3390/ijms23010374] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 02/07/2023] Open
Abstract
Osseointegration is a prerequisite for the long-term success of implants. Titanium implants are preferred for their biocompatibility and mechanical properties. Nonetheless, the need for early and immediate loading requires enhancing these properties by adding bioactive coatings. In this preclinical study, extracellular matrix properties and cellular balance at the implant/bone interface was examined. Polyelectrolyte multilayers of chitosan and gelatin or with chitosan and Hyaluronic acid fabricated on titanium alloy using a layer-by-layer self-assembly process were compared with native titanium alloy. The study aimed to histologically evaluate bone parameters that correlate to the biomechanical anchorage enhancement resulted from bioactive coatings of titanium implants in a rat animal model. Superior collagen fiber arrangements and an increased number of active osteocytes reflected a significant improvement of bone matrix quality at the bone interface of the chitosan/gelatin-coated titan implants over chitosan/hyaluronic acid-coated and native implants. Furthermore, the numbers and localization of osteoblasts and osteoclasts in the reparative and remodeling phases suggested a better cellular balance in the chitosan/Gel-coated group over the other two groups. Investigating the micro-mechanical properties of bone tissue at the interface can elucidate detailed discrepancies between different promising bioactive coatings of titanium alloys to maximize their benefit in future medical applications.
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Affiliation(s)
- Sabine Stoetzel
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
| | - Deeksha Malhan
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
| | - Ute Wild
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
| | - Christian Helbing
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany; (C.H.); (K.D.J.)
| | - Fathi Hassan
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
| | - Sameh Attia
- Department of Oral and Maxillofacial Surgery, Justus-Liebig University of Giessen, Klinikstrasse 33, 35392 Giessen, Germany;
| | - Klaus D. Jandt
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany; (C.H.); (K.D.J.)
| | - Christian Heiss
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
- Department of Trauma, Hand and Reconstructive Surgery, Justus-Liebig University Giessen, Rudolf-Buchheim-Strasse 7, 35392 Giessen, Germany
| | - Thaqif El Khassawna
- Experimental Trauma Surgery, Faculty of Medicine, Justus-Liebig-University, Aulweg 128, 35392 Giessen, Germany; (S.S.); (D.M.); (U.W.); (F.H.); (C.H.)
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8
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Review on material parameters to enhance bone cell function in vitro and in vivo. Biochem Soc Trans 2021; 48:2039-2050. [PMID: 32940685 DOI: 10.1042/bst20200210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/19/2020] [Accepted: 08/21/2020] [Indexed: 02/07/2023]
Abstract
Bone plays critical roles in support, protection, movement, and metabolism. Although bone has an innate capacity for regeneration, this capacity is limited, and many bone injuries and diseases require intervention. Biomaterials are a critical component of many treatments to restore bone function and include non-resorbable implants to augment bone and resorbable materials to guide regeneration. Biomaterials can vary considerably in their biocompatibility and bioactivity, which are functions of specific material parameters. The success of biomaterials in bone augmentation and regeneration is based on their effects on the function of bone cells. Such functions include adhesion, migration, inflammation, proliferation, communication, differentiation, resorption, and vascularization. This review will focus on how different material parameters can enhance bone cell function both in vitro and in vivo.
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The limit of tolerable micromotion for implant osseointegration: a systematic review. Sci Rep 2021; 11:10797. [PMID: 34031476 PMCID: PMC8144379 DOI: 10.1038/s41598-021-90142-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/04/2021] [Indexed: 02/04/2023] Open
Abstract
Much research effort is being invested into the development of porous biomaterials that enhance implant osseointegration. Large micromotions at the bone-implant interface impair this osseointegration process, resulting in fibrous capsule formation and implant loosening. This systematic review compiled all the in vivo evidence available to establish if there is a universal limit of tolerable micromotion for implant osseointegration. The protocol was registered with the International Prospective Register for Systematic Reviews (ID: CRD42020196686). Pubmed, Scopus and Web of Knowledge databases were searched for studies containing terms relating to micromotion and osseointegration. The mean value of micromotion for implants that osseointegrated was 32% of the mean value for those that did not (112 ± 176 µm versus 349 ± 231 µm, p < 0.001). However, there was a large overlap in the data ranges with no universal limit apparent. Rather, many factors were found to combine to affect the overall outcome including loading time, the type of implant and the material being used. The tables provided in this review summarise these factors and will aid investigators in identifying the most relevant micromotion values for their biomaterial and implant development research.
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10
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Bonfante EA, Jimbo R, Witek L, Tovar N, Neiva R, Torroni A, Coelho PG. Biomaterial and biomechanical considerations to prevent risks in implant therapy. Periodontol 2000 2019; 81:139-151. [PMID: 31407440 DOI: 10.1111/prd.12288] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This paper is aimed to present a biomaterials perspective in implant therapy that fosters improved bone response and long-term biomechanical competence from surgical instrumentation to final prosthetic rehabilitation. Strategies to develop implant surface texturing will be presented and their role as an ad hoc treatment discussed in light of the interplay between surgical instrumentation and implant macrogeometric configuration. Evidence from human retrieved implants in service for several years and from in vivo studies will be used to show how the interplay between surgical instrumentation and implant macrogeometry design affect osseointegration healing pathways, and bone morphologic and long-term mechanical properties. Also, the planning of implant-supported prosthetic rehabilitations targeted at long-term performance will be appraised from a standpoint where personal preferences (eg, cementing or screwing a prosthesis) can very often fail to deliver the best patient care. Lastly, the acknowledgement that every rehabilitation will have its strength degraded over time once in function will be highlighted, since the potential occurrence of even minor failures is rarely presented to patients prior to treatment.
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Affiliation(s)
- Estevam A Bonfante
- Department of Prosthodontics and Periodontology, University of São Paulo Bauru School of Dentistry, Bauru, Brazil
| | - Ryo Jimbo
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Lukasz Witek
- Department of Biomaterials, New York University, New York City, New York, USA
| | - Nick Tovar
- Department of Biomaterials, New York University, New York City, New York, USA
| | - Rodrigo Neiva
- Department of Periodontology, University of Florida at Gainesville, Gainesville, Florida, USA
| | - Andrea Torroni
- Attending Oral and Maxillofacial Surgery, Hansjörg Wyss Department of Plastic Surgery, New York University Langone Medical Center, New York City, New York, USA
| | - Paulo G Coelho
- Department of Biomaterials, Hansjörg Wyss Department of Plastic Surgery, Mechanical and Aerospace Engineering, New York University, New York City, New York, USA
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11
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Yi Y, Men Y, Jing D, Luo W, Zhang S, Feng JQ, Liu J, Ge W, Wang J, Zhao H. 3-dimensional visualization of implant-tissue interface with the polyethylene glycol associated solvent system tissue clearing method. Cell Prolif 2019; 52:e12578. [PMID: 30714253 PMCID: PMC6536405 DOI: 10.1111/cpr.12578] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/14/2018] [Accepted: 12/28/2018] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Dental implants are major treatment options for restoring teeth loss. Biological processes at the implant-tissue interface are critical for implant osseointegration. Superior mechanical properties of the implant constitute a major challenge for traditional histological techniques. It is imperative to develop new technique to investigate the implant-tissue interface. MATERIALS AND METHODS Our laboratory developed the polyethylene glycol (PEG)-associated solvent system (PEGASOS) tissue clearing method. By immersing samples into various chemical substances, bones and teeth could be turned to transparent with intact internal structures and endogenous fluorescence being preserved. We combined the PEGASOS tissue clearing method with transgenic mouse line and other labelling technique to investigate the angiogenesis and osteogenesis processes occurring at the implant-bone interface. RESULTS Clearing treatment turned tissue highly transparent and implant could be directly visualized without sectioning. Implant, soft/hard tissues and fluorescent labels were simultaneously imaged in decalcified or non-decalcified mouse mandible samples without disturbing their interfaces. Multi-channel 3-dimensional image stacks at high resolution were acquired and quantified. The processes of angiogenesis and osteogenesis surrounding titanium or stainless steel implants were investigated. CONCLUSIONS Both titanium and stainless steel implants support angiogenesis at comparable levels. Successful osseointegration and calcium precipitation occurred only surrounding titanium, but not stainless steel implants. PEGASOS tissue clearing method provides a novel approach for investigating the interface between implants and hard tissue.
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Affiliation(s)
- Yating Yi
- State Key Laboratory of Oral Diseases, West China School of StomatologySichuan UniversityChengduChina
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Yi Men
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Dian Jing
- State Key Laboratory of Oral Diseases, West China School of StomatologySichuan UniversityChengduChina
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Wenjing Luo
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Shiwen Zhang
- State Key Laboratory of Oral Diseases, West China School of StomatologySichuan UniversityChengduChina
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Jian Q. Feng
- Department of Biomedical Sciences, College of DentistryTexas A&M UniversityDallasTexas
| | - Jin Liu
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China HospitalSichuan UniversityChengduChina
| | - Woo‐Ping Ge
- Children’s Research InstituteUniversity of Texas Southwestern Medical CentreDallasTexas
| | - Jun Wang
- State Key Laboratory of Oral Diseases, West China School of StomatologySichuan UniversityChengduChina
| | - Hu Zhao
- Department of Restorative Sciences, College of DentistryTexas A&M UniversityDallasTexas
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12
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Dos Santos ML, Dos Santos Riccardi C, de Almeida Filho E, Guastaldi AC. Sol-gel based calcium phosphates coatings deposited on binary Ti-Mo alloys modified by laser beam irradiation for biomaterial/clinical applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:82. [PMID: 29892909 DOI: 10.1007/s10856-018-6091-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 05/24/2018] [Indexed: 06/08/2023]
Abstract
Ti-15Mo alloy samples were irradiated by pulsed Yb: YAG laser beam under air and atmospheric pressure. Calcium phosphate coatings were deposited on the irradiated surfaces by the sol-gel method. The sol was prepared from the precursors Ca (NO3)2.4H2 O and H3 PO4. The modified surfaces were submitted to heat treatment conditions at 350 and 600 °C. The results showed that the two conditions established have a sufficient energy to promote ablation on the laser beam irradiated surfaces. Likewise, it has been demonstrated the processes of fusion and fast solidification from the laser beam irradiation, under ambient atmosphere, inducing the formation of stoichiometric TiO2 and non-stoichiometric titanium oxides, including Ti3O5, TiO, Ti3O and Ti6O with different oxide percentages depending on the fluency used. Besides that, laser modification has allowed a clean and reproducible process, providing no traces of contamination, an important feature for clinical applications. The physico-chemical and morphological properties indicated the formation of a mixture of phases: calcium pyrophosphate, hydroxyapatite and β-TCP for the procedure (PA: calcination temperature), whereas HA (hydroxyapatite) and β-TCP (tricalcium phosphate) were obtained by the procedure (PB: calcination temperature). Therefore, it was possible to obtain a Ti-15Mo alloy surface consisted on calcium phosphate ceramics of biological interest using the procedure (PB). Thus, the laser beam irradiation associated to bioactive coatings of calcium phosphates of biological interest have shown to be promising and economically feasible for use in dental and orthopedic implants.
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Affiliation(s)
- Marcio Luiz Dos Santos
- Center of Natural and Human Sciences, Federal University of ABC - UFABC, 09210-580, Santo André, São Paulo, Brazil.
- Biotechnology and Innovation in Health Program and Master Professional in Pharmacy Program - Anhanguera University of São Paulo (UNIAN - SP), 05145-200, São Paulo, SP, Brazil.
| | - Carla Dos Santos Riccardi
- College of Agricultural Sciences, Paulista State University - UNESP, 18610-307, Botucatu, São Paulo, Brazil
| | - Edson de Almeida Filho
- Institute of Chemistry, 14800-060, Biomaterials Group, Paulista State University - UNESP, Araraquara, Brazil
| | - Antonio C Guastaldi
- Institute of Chemistry, 14800-060, Biomaterials Group, Paulista State University - UNESP, Araraquara, Brazil
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Yazdani J, Ahmadian E, Sharifi S, Shahi S, Maleki Dizaj S. A short view on nanohydroxyapatite as coating of dental implants. Biomed Pharmacother 2018; 105:553-557. [PMID: 29886376 DOI: 10.1016/j.biopha.2018.06.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 06/01/2018] [Accepted: 06/02/2018] [Indexed: 02/01/2023] Open
Abstract
INTRODUCTION Titanium based (Ti-based) materials have been used as dental implants due to their high biocompatibility, good mechanical strength and ideal osseointegration properties. Osseointegration of an implant is dependent on surface characteristics such as surface chemistry and topography. Nanotechnology has presented new and interesting applications in dentistry in recent years. The presence of nanoparticles on the implant surface can affect both the topography and surface chemistry, leading to different and outstanding specifications for implant. METHOD A literature review was performed in electronic databases by means of MeSH keywords to collect relevant published literature in English about the effect of nanohydroxyapatite on osseointegration of titanium implants. No limitations on publication date were imposed. Data regarding titanium implants; nanotechnology; nanohydroxyapatite; osseointegration and cell attachment were collected and reviewed. RESULTS AND CONCLUSION According to reviewed literature, nanohydroxyapatites have a nanostructured surface with higher surface area and then higher reactivity, letting them to bind to bone creating a biomimetic coating on implants. However, more studies are needed on the cell-substrate interface to develop an effective implant due to the interaction of the cells and the biomaterial surface after the implantation.
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Affiliation(s)
- Javad Yazdani
- Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elham Ahmadian
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Simin Sharifi
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shahriar Shahi
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Dentistry, Department of Endodontics, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Solmaz Maleki Dizaj
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.
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14
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Ha SW, Park J, Habib MM, Beck GR. Nano-Hydroxyapatite Stimulation of Gene Expression Requires Fgf Receptor, Phosphate Transporter, and Erk1/2 Signaling. ACS APPLIED MATERIALS & INTERFACES 2017; 9:39185-39196. [PMID: 29045789 DOI: 10.1021/acsami.7b12029] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hydroxyapatite (HAp) is critical to health both as the main structural material of the skeleton and storage material of calcium and phosphate. Nanosized HAp (nHAp) is naturally produced by mineralizing cells during bone formation and remodeling and is the main constituent of the skeleton. As such, HAp is currently being investigated as a therapeutic biomaterial for orthopedic and dental purposes. Recent studies have suggested that extracellular nHAp can influence osteoblast lineage commitment and cell function through changes in gene expression; however, the mechanisms remain to be elucidated. Here, the cellular and molecular mechanism by which rod-shaped nHAp (10 × 100 nm) stimulates gene expression in preosteoblast bone marrow stromal cells was investigated. Electron microscopy detected a rapid and stable interaction of nHAp with the cell membrane, which correlated with a strong stimulation of the Erk1/2 signaling pathway. Results also identified the requirement of the Fgf receptor signaling and phosphate-transporters for nHAp regulated gene expression whereas a calcium-sensing receptor inhibitor had no effect. Collectively, the study uncovers novel signaling pathways and cellular events specifically stimulated by and required for the cellular response to free extracellular HAp. The results provide insight into the osteoblastic response to HAp relevant to functional mineralization and pathological calcification and could be used in the development of biomaterials for orthopedic purposes.
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Affiliation(s)
- Shin-Woo Ha
- Department of Medicine, Division of Endocrinology, Emory University , 101 Woodruff Circle, 1026 WMRB, Atlanta, Georgia 30322, United States
| | - Jonathan Park
- Department of Medicine, Division of Endocrinology, Emory University , 101 Woodruff Circle, 1026 WMRB, Atlanta, Georgia 30322, United States
| | - Mark M Habib
- The Atlanta Department of Veterans Affairs Medical Center , Decatur, Georgia 30033, United States
| | - George R Beck
- The Atlanta Department of Veterans Affairs Medical Center , Decatur, Georgia 30033, United States
- Department of Medicine, Division of Endocrinology, Emory University , 101 Woodruff Circle, 1026 WMRB, Atlanta, Georgia 30322, United States
- The Winship Cancer Institute, Emory University School of Medicine , Atlanta, Georgia 30322, United States
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15
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Cytotoxicity Evaluation of High-Temperature Annealed Nanohydroxyapatite in Contact with Fibroblast Cells. MATERIALS 2017; 10:ma10060590. [PMID: 28772950 PMCID: PMC5553407 DOI: 10.3390/ma10060590] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 04/21/2017] [Accepted: 05/23/2017] [Indexed: 11/16/2022]
Abstract
Biomaterials are substances manufactured for medical purposes in direct contact with the tissues of organisms. Prior to their use, they are tested to determine their usefulness and safety of application. Hydroxyapatites are used in medicine as a bony complement because of their similarity to the natural apatite therein. Thanks to their bioactivity, biocompatibility, stability and non-toxicity hydroxyapatite are the most commonly used materials in osteoimplantology. The use of materials at the nanoscale in medicine or biology may carry the risk of undesirable effects. The aim of the study was to evaluate the cytotoxic effect of high-temperature annealed nanohydroxyapatites on the L929 murine fibroblasts. Nanohydroxyapatites in powder form were obtained by the wet chemistry method: in the temperature range of 800–1000 °C and used for the study. Based on performed studies evaluating the morphology and fibroblast viability, it was found that nanohydroxyapatites show no cytotoxic effects on the L929 cell line.
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16
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Dhaliwal JS, Albuquerque RF, Murshed M, Feine JS. Osseointegration of standard and mini dental implants: a histomorphometric comparison. Int J Implant Dent 2017; 3:15. [PMID: 28462508 PMCID: PMC5411366 DOI: 10.1186/s40729-017-0079-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/26/2017] [Indexed: 11/17/2022] Open
Abstract
Background Mini dental implants (MDIs) are becoming increasingly popular for rehabilitation of edentulous patients because of their several advantages. However, there is a lack of evidence on the osseointegration potential of the MDIs. The objective of the study was to histomorphometrically evaluate and compare bone apposition on the surface of MDIs and standard implants in a rabbit model. Methods Nine New Zealand white rabbits were used for the study to meet statistical criteria for adequate power. Total 18 3M™ESPE™ MDIs and 18 standard implants (Ankylos® Friadent, Dentsply) were inserted randomly into the tibia of rabbits (four implants per rabbit); animals were sacrificed after a 6-week healing period. The specimens were retrieved en bloc and preserved in 10% formaldehyde solution. Specimens were prepared for embedding in a light cure acrylic resin (Technovit 9100). The most central sagittal histological sections (30–40 μm thick) were obtained using a Leica SP 1600 saw microtome. After staining, the Leica DM2000 microscope was used, the images were captured using Olympus DP72 camera and associated software. Bone implant contact (BIC) was measured using Infinity Analyze software. Results All implants were osseointegrated. Histologic measures show mineralized bone matrix in intimate contact with the implant surface in both groups. The median BIC was 58.5 % (IQR 8.0) in the MDI group and 57.0 % (IQR 5.5) in the control group (P > 0.05; Mann-Whitney test). There were no statistical differences in osseointegration at 6 weeks between MDIs and standard implants in rabbit tibias. Conclusions Based on these results, it is concluded that osseointegration of MDIs is similar to that of standard implants.
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Affiliation(s)
- Jagjit S Dhaliwal
- Faculty of Dentistry, McGill University, 2001 McGill College Avenue, Suite 500, Montreal, Quebec, H3A 1G1, Canada.
| | - Rubens F Albuquerque
- Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Monzur Murshed
- Faculty of Dentistry, McGill University, 2001 McGill College Avenue, Suite 500, Montreal, Quebec, H3A 1G1, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Jocelyne S Feine
- Faculty of Dentistry, McGill University, 2001 McGill College Avenue, Suite 500, Montreal, Quebec, H3A 1G1, Canada
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17
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Martínez-Ibáñez M, Juan-Díaz MJ, Lara-Saez I, Coso A, Franco J, Gurruchaga M, Suay Antón J, Goñi I. Biological characterization of a new silicon based coating developed for dental implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:80. [PMID: 26936366 DOI: 10.1007/s10856-016-5690-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 02/17/2016] [Indexed: 06/05/2023]
Abstract
Taking into account the influence of Si in osteoblast cell proliferation, a series of sol-gel derived silicon based coating was prepared by controlling the process parameters and varying the different Si-alkoxide precursors molar rate in order to obtain materials able to release Si compounds. For this purpose, methyltrimethoxysilane (MTMOS) and tetraethyl orthosilicate (TEOS) were hydrolysed together and the sol obtained was used to dip-coat the different substrates. The silicon release ability of the coatings was tested finding that it was dependent on the TEOS precursor content, reaching a Si amount value around ninefolds higher for coatings with TEOS than for the pure MTMOS material. To test the effect of this released Si, the in vitro performance of developed coatings was tested with human adipose mesenchymal stem cells finding a significantly higher proliferation and mineralization on the coating with the higher TEOS content. For in vivo evaluation of the biocompatibility, coated implants were placed in the tibia of the rabbit and a histological analysis was performed. The evaluation of parameters such as the bone marrow state, the presence of giant cells and the fibrous capsule proved the biocompatibility of the developed coatings. Furthermore, coated implants seemed to produce a qualitatively higher osteoblastic activity and a higher number of bone spicules than the control (uncoated commercial SLA titanium dental implant).
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Affiliation(s)
- M Martínez-Ibáñez
- Polymer Science and Technology Department, University of the Basque Country (UPV/EHU), P Manuel de Lardizabal, 3, 20018, San Sebastián, Spain
| | - M J Juan-Díaz
- Polymer Science and Technology Department, University of the Basque Country (UPV/EHU), P Manuel de Lardizabal, 3, 20018, San Sebastián, Spain
| | - I Lara-Saez
- Industrial Systems Engineering and Design Department, Jaime I University (UJI), 12071, Castellón de la Plana, Spain
| | - A Coso
- Ilerimplant SL, 25191, Lleida, Spain
| | - J Franco
- Ilerimplant SL, 25191, Lleida, Spain
| | - M Gurruchaga
- Polymer Science and Technology Department, University of the Basque Country (UPV/EHU), P Manuel de Lardizabal, 3, 20018, San Sebastián, Spain
| | - J Suay Antón
- Industrial Systems Engineering and Design Department, Jaime I University (UJI), 12071, Castellón de la Plana, Spain
| | - Isabel Goñi
- Polymer Science and Technology Department, University of the Basque Country (UPV/EHU), P Manuel de Lardizabal, 3, 20018, San Sebastián, Spain.
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Coelho PG, Takayama T, Yoo D, Jimbo R, Karunagaran S, Tovar N, Janal MN, Yamano S. Nanometer-scale features on micrometer-scale surface texturing: a bone histological, gene expression, and nanomechanical study. Bone 2014; 65:25-32. [PMID: 24813260 DOI: 10.1016/j.bone.2014.05.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 04/18/2014] [Accepted: 05/05/2014] [Indexed: 11/29/2022]
Abstract
Micro- and nanoscale surface modifications have been the focus of multiple studies in the pursuit of accelerating bone apposition or osseointegration at the implant surface. Here, we evaluated histological and nanomechanical properties, and gene expression, for a microblasted surface presenting nanometer-scale texture within a micrometer-scale texture (MB) (Ossean Surface, Intra-Lock International, Boca Raton, FL) versus a dual-acid etched surface presenting texture at the micrometer-scale only (AA), in a rodent femur model for 1, 2, 4, and 8weeks in vivo. Following animal sacrifice, samples were evaluated in terms of histomorphometry, biomechanical properties through nanoindentation, and gene expression by real-time quantitative reverse transcription polymerase chain reaction analysis. Although the histomorphometric, and gene expression analysis results were not significantly different between MB and AA at 4 and 8 weeks, significant differences were seen at 1 and 2 weeks. The expression of the genes encoding collagen type I (COL-1), and osteopontin (OPN) was significantly higher for MB than for AA at 1 week, indicating up-regulated osteoprogenitor and osteoblast differentiation. At 2 weeks, significantly up-regulated expression of the genes for COL-1, runt-related transcription factor 2 (RUNX-2), osterix, and osteocalcin (OCN) indicated progressive mineralization in newly formed bone. The nanomechanical properties tested by the nanoindentation presented significantly higher-rank hardness and elastic modulus for the MB compared to AA at all time points tested. In conclusion, the nanotopographical featured surfaces presented an overall higher host-to-implant response compared to the microtextured only surfaces. The statistical differences observed in some of the osteogenic gene expression between the two groups may shed some insight into the role of surface texture and its extent in the observed bone healing mechanisms.
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Affiliation(s)
- Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
| | - Tadahiro Takayama
- Department of Prosthodontics, New York University College of Dentistry, New York, NY, USA
| | - Daniel Yoo
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
| | - Ryo Jimbo
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
| | - Sanjay Karunagaran
- Department of Prosthodontics, University of Tennessee Health Science Center, College of Dentistry, Memphis, TN, USA
| | - Nick Tovar
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
| | - Malvin N Janal
- Department of Epidemiology and Health Promotion, New York University, New York, NY, USA
| | - Seiichi Yamano
- Department of Prosthodontics, New York University College of Dentistry, New York, NY, USA
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