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Liu Z, Xiao K, Hou Z, Yan F, Chen Y, Cai L. Multifunctional Coating with Both Thermal Insulation and Antibacterial Properties Applied to Nickel-Titanium Alloy. Int J Nanomedicine 2020; 15:7215-7234. [PMID: 33061377 PMCID: PMC7532895 DOI: 10.2147/ijn.s266247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 08/25/2020] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND With excellent shape memory and superelastic properties, shape memory alloy (SMA) is an ideal actuator, and it can form smart structure for different applications in medical field. However, SMA devices cause apparent thermal damage to the surrounding tissues when it works in vivo, making the application of smart structure that is composed of SMA actuator in vivo is greatly limited. METHODS In this paper, coating (APA) with PLA as the main body to limit the heat conduction, a multifunctional Ag nanoparticles (AgNPs)/polylactic acid (PLA)/Al2O3 was synthesized. The Al2O3 layer was formed by micro-arc oxidation (MAO) and AgNPs were synthesized by silver nitrate and ethylene glycol. Scanning electron microscopy, transmission electron microscope, and Fourier transform infrared spectra were applied to analyze the morphology and characterization of APA coating. The antimicrobial activity, thermal insulation activity, and biocompatibility of APA coating were furtherly explored and verified through animal experiments and immunohistochemistry. RESULTS With different particle sizes and concentrations of AgNPs, APA multi-functional films were successfully prepared. The Al2O3 layer was closely combined with SMA and formed a porous surface, so the PLA and AgNPs layers can firmly adhere to SMA, thus reducing the release of nickel ions in SMA. AgNPs gave APA coating excellent antibacterial activity and effectively inhibited the growth of Staphylococcus aureus. In addition, coupled with the low thermal conductivity of PLA and Al2O3, AgNPs were tightly anchored on the surface of PLA, which has high infrared reflectivity, making the APA coating obtain good thermal insulation performance. CONCLUSION We have successfully prepared the APA coating and obtained the optimum amount of AgNPs, which makes it have good thermal insulation performance, good antibacterial activity and good biocompatibility, which provides a new prospect for the application of SMA.
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Affiliation(s)
- ZhiBo Liu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
| | - KangWen Xiao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
| | - ZhiQiang Hou
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
| | - FeiFei Yan
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
| | - Yan Chen
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
| | - Lin Cai
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei430071, People’s Republic of China
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López-Valverde N, Flores-Fraile J, Ramírez JM, Macedo de Sousa B, Herrero-Hernández S, López-Valverde A. Bioactive Surfaces vs. Conventional Surfaces in Titanium Dental Implants: A Comparative Systematic Review. J Clin Med 2020; 9:jcm9072047. [PMID: 32610687 PMCID: PMC7408888 DOI: 10.3390/jcm9072047] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/17/2020] [Accepted: 06/21/2020] [Indexed: 12/15/2022] Open
Abstract
Animal studies and the scarce clinical trials available that have been conducted suggest that bioactive surfaces on dental implants could improve the osseointegration of such implants. The purpose of this systematic review was to compare the effectiveness of osseointegration of titanium (Ti) dental implants using bioactive surfaces with that of Ti implants using conventional surfaces such as sandblasted large-grit acid-etched (SLA) or similar surfaces. Applying the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement, the MEDLINE, PubMed Central and Web of Science databases were searched for scientific articles in April 2020. The keywords used were “dental implants”, “bioactive surfaces”, “biofunctionalized surfaces”, and “osseointegration”, according to the question: “Do bioactive dental implant surfaces have greater osseointegration capacity compared with conventional implant surfaces?” Risk of bias was assessed using the Cochrane Collaboration tool. 128 studies were identified, of which only 30 met the inclusion criteria: 3 clinical trials and 27 animal studies. The average STROBE (STrengthening the Reporting of OBservational studies in Epidemiology) and ARRIVE (Animal Research: Reporting of In Vivo Experiments) scores were 15.13 ± 2.08 and 17.7±1.4, respectively. Implant stability quotient (ISQ) was reported in 3 studies; removal torque test (RTT)—in 1 study; intraoral periapical X-ray and microcomputed tomography radiological evaluation (RE)—in 4 studies; shear force (SF)—in 1 study; bone-to-implant contact (BIC)—in 12 studies; and BIC and bone area (BA) jointly—in 5 studies. All animal studies reported better bone-to-implant contact surface for bioactive surfaces as compared to control implants with a statistical significance of p < 0.05. Regarding the bioactive surfaces investigated, the best results were yielded by the one where mechanical and chemical treatment methods of the Ti surfaces were combined. Hydroxyapatite (HA) and calcium–phosphate (Ca–Ph) were the most frequently used bioactive surfaces. According to the results of this systematic review, certain bioactive surfaces have a positive effect on osseointegration, although certain coating biomolecules seem to influence early peri-implant bone formation. Further and more in-depth research in this field is required to reduce the time needed for osseointegration of dental implants.
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Affiliation(s)
- Nansi López-Valverde
- Department of Surgery, University of Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain; (N.L.-V.); (J.F.-F.); (S.H.-H.)
| | - Javier Flores-Fraile
- Department of Surgery, University of Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain; (N.L.-V.); (J.F.-F.); (S.H.-H.)
| | - Juan Manuel Ramírez
- Department of Morphological Sciences, University of Cordoba, Avenida Menéndez Pidal s/n, 14071 Cordoba, Spain;
| | - Bruno Macedo de Sousa
- Institute for Occlusion and Orofacial Pain Faculty of Medicine, University of Coimbra, Polo I - Edifício Central Rua Larga, 3004-504 Coimbra, Portugal;
| | - Silvia Herrero-Hernández
- Department of Surgery, University of Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain; (N.L.-V.); (J.F.-F.); (S.H.-H.)
| | - Antonio López-Valverde
- Department of Surgery, University of Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain; (N.L.-V.); (J.F.-F.); (S.H.-H.)
- Correspondence:
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Coelho PG, Gil LF, Neiva R, Jimbo R, Tovar N, Lilin T, Bonfante EA. Microrobotized blasting improves the bone-to-textured implant response. A preclinical in vivo biomechanical study. J Mech Behav Biomed Mater 2015; 56:175-182. [PMID: 26703231 DOI: 10.1016/j.jmbbm.2015.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 11/06/2015] [Accepted: 11/09/2015] [Indexed: 01/25/2023]
Abstract
This study evaluated the effect of microrobotized blasting of titanium endosteal implants relative to their manually blasted counterparts. Two different implant systems were utilized presenting two different implant surfaces. Control surfaces (Manual) were fabricated by manually grit blasting the implant surfaces while experimental surfaces (Microblasted) were fabricated through a microrobotized system that provided a one pass grit blasting routine. Both surfaces were created with the same ~50µm average particle size alumina powder at ~310KPa. Surfaces were then etched with 37% HCl for 20min, washed, and packaged through standard industry procedures. The surfaces were characterized through scanning electron microscopy (SEM) and optical interferometry, and were then placed in a beagle dog radius model remaining in vivo for 3 and 6 weeks. The implant removal torque was recorded and statistical analysis evaluated implant system and surface type torque levels as a function of time in vivo. Histologic sections were qualitatively evaluated for tissue response. Electron microscopy depicted textured surfaces for both manual and microblasted surfaces. Optical interferometry showed significantly higher Sa, Sq, values for the microblasted surface and no significant difference for Sds and Sdr values between surfaces. In vivo results depicted that statistically significant gains in biomechanical fixation were obtained for both implant systems tested at 6 weeks in vivo, while only one system presented significant biomechanical gain at 3 weeks. Histologic sections showed qualitative higher amounts of new bone forming around microblasted implants relative to the manually blasted group. Microrobotized blasting resulted in higher biomechanical fixation of endosteal dental implants and should be considered as an alternative for impant surface manufacturing.
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Affiliation(s)
- Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University, 433 1st Ave., Room 844, New York, NY 10010, USA; Director for Research, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, 345E 24th Street, New York, NY 10010, USA; Affiliated Faculty, Department of Engineering, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
| | - Luiz F Gil
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, Universidade Federal de Santa Catarina, R. Eng. Agronômico Andrei Cristian Ferreira, s/n-Trindade, Florianópolis, SC 88040-900, Brazil
| | - Rodrigo Neiva
- Department of Periodontology, University of Florida at Gainesville, 1395 Center Dr, Gainesville, FL 32610, USA
| | - Ryo Jimbo
- Department of Prosthodontics, Malmo University, Malmo 205 06, Sweden
| | - Nick Tovar
- Department of Biomaterials and Biomimetics, New York University, 433 1st Ave., Room 844, New York, NY 10010, USA
| | - Thomas Lilin
- École Nationale Vétérinaire d׳Alfort, 7 Avenue du Général de Gaulle, 94704 Mainsons-Alfort, France
| | - Estevam A Bonfante
- Department of Prosthodontics, University of Sao Paulo - Bauru College of Dentistry, Alameda Otávio Pinheiro Brisola 9-75, Bauru, SP 17.012-901, Brazil.
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Beutel BG, Danna NR, Granato R, Bonfante EA, Marin C, Tovar N, Suzuki M, Coelho PG. Implant design and its effects on osseointegration over time within cortical and trabecular bone. J Biomed Mater Res B Appl Biomater 2015; 104:1091-7. [PMID: 26034012 DOI: 10.1002/jbm.b.33463] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 05/07/2015] [Accepted: 05/13/2015] [Indexed: 01/03/2023]
Abstract
Healing chambers present at the interface between implant and bone have become a target for improving osseointegration. The objective of the present study was to compare osseointegration of several implant healing chamber configurations at early time points and regions of interest within bone using an in vivo animal femur model. Six implants, each with a different healing chamber configuration, were surgically implanted into each femur of six skeletally mature beagle dogs (n = 12 implants per dog, total n = 72). The implants were harvested at 3 and 5 weeks post-implantation, non-decalcified processed to slides, and underwent histomorphometry with measurement of bone-to-implant contact (BIC) and bone area fraction occupied (BAFO) within healing chambers at both cortical and trabecular bone sites. Microscopy demonstrated predominantly woven bone at 3 weeks and initial replacement of woven bone by lamellar bone by 5 weeks. BIC and BAFO were both significantly increased by 5 weeks (p < 0.001), and significantly higher in cortical than trabecular bone (p < 0.001). The trapezoidal healing chamber design demonstrated a higher BIC than other configurations. Overall, a strong temporal and region-specific dependence of implant osseointegration in femurs was noted. Moreover, the findings suggest that a trapezoidal healing chamber configuration may facilitate the best osseointegration. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1091-1097, 2016.
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Affiliation(s)
- Bryan G Beutel
- Department of Biomaterials and Biomimetics, New York University, New York, New York, 10010
| | - Natalie R Danna
- Department of Biomaterials and Biomimetics, New York University, New York, New York, 10010
| | - Rodrigo Granato
- Department of Dentistry, UNIGRANRIO University, School of Health Sciences, 25071-202 Duque de Caxias, Rua da Lapa, 86, Centro, RJ, Brazil
| | - Estevam A Bonfante
- Department of Prosthodontics, University of Sao Paulo, Bauru College of Dentistry, Al. Dr. Octávio Pinheiro Brisola, 9-75, Bauru, Sao Paulo, 17012-901, Brazil
| | - Charles Marin
- Department of Dentistry, UNIGRANRIO University, School of Health Sciences, 25071-202 Duque de Caxias, Rua da Lapa, 86, Centro, RJ, Brazil
| | - Nick Tovar
- Department of Biomaterials and Biomimetics, New York University, New York, New York, 10010
| | - Marcelo Suzuki
- Department of Prosthodontics and Operative Dentistry, Tufts University School of Dental Medicine, Boston, Massachusetts, 02111
| | - Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University, New York, New York, 10010
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Osseointegration of Plateau Root Form Implants: Unique Healing Pathway Leading to Haversian-Like Long-Term Morphology. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 881:111-28. [PMID: 26545747 DOI: 10.1007/978-3-319-22345-2_7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Endosteal dental implants have been utilized as anchors for dental and orthopedic rehabilitations for decades with one of the highest treatment success rates in medicine. Such success is due to the phenomenon of osseointegration where after the implant surgical placement, bone healing results into an intimate contact between bone and implant surface. While osseointegration is an established phenomenon, the route which osseointegration occurs around endosteal implants is related to various implant design factors including surgical instrumentation and implant macro, micro, and nanometer scale geometry. In an implant system where void spaces (healing chambers) are present between the implant and bone immediately after placement, its inherent bone healing pathway results in unique opportunities to accelerate the osseointegration phenomenon at the short-term and its maintenance on the long-term through a haversian-like bone morphology and mechanical properties.
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Osseointegration: hierarchical designing encompassing the macrometer, micrometer, and nanometer length scales. Dent Mater 2014; 31:37-52. [PMID: 25467952 DOI: 10.1016/j.dental.2014.10.007] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 09/14/2014] [Accepted: 10/31/2014] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Osseointegration has been a proven concept in implant dentistry and orthopedics for decades. Substantial efforts for engineering implants for reduced treatment time frames have focused on micrometer and most recently on nanometer length scale alterations with negligible attention devoted to the effect of both macrometer design alterations and surgical instrumentation on osseointegration. This manuscript revisits osseointegration addressing the individual and combined role of alterations on the macrometer, micrometer, and nanometer length scales on the basis of cell culture, preclinical in vivo studies, and clinical evidence. METHODS A critical appraisal of the literature was performed regarding the impact of dental implant designing on osseointegration. Results from studies with different methodological approaches and the commonly observed inconsistencies are discussed. RESULTS It is a consensus that implant surface topographical and chemical alterations can hasten osseointegration. However, the tailored combination between multiple length scale design parameters that provides maximal host response is yet to be determined. SIGNIFICANCE In spite of the overabundant literature on osseointegration, a proportional inconsistency in findings hitherto encountered warrants a call for appropriate multivariable study designing to ensure that adequate data collection will enable osseointegration maximization and/or optimization, which will possibly lead to the engineering of endosteal implant designs that can be immediately placed/loaded regardless of patient dependent conditions.
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Gil LF, Suzuki M, Janal MN, Tovar N, Marin C, Granato R, Bonfante EA, Jimbo R, Gil JN, Coelho PG. Progressive plateau root form dental implant osseointegration: A human retrieval study. J Biomed Mater Res B Appl Biomater 2014; 103:1328-32. [PMID: 25367155 DOI: 10.1002/jbm.b.33311] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 08/20/2014] [Accepted: 10/18/2014] [Indexed: 11/10/2022]
Abstract
Although preclinical and sparse human histology retrieval studies have shown that the interface between implant and bone is constantly remodeling, no human retrieval database has been developed to determine the effect of functional loading time and other clinical/implant design variables on osseointegration. The present study tested the hypothesis that bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) increase over functional loading time around dental implants. Due to prosthetic retreatment reasons, 93 human implant retrievals from the same manufacturer (Bicon LLC, Boston, MA, USA) were obtained over a period of approximately 15 years. The retrieved implants were under functional loading from 120 days to ∼18 years and were histomorphologic/metrically evaluated. BIC/BAFO were assessed as a function of multiple independent variables: implant surface type, diameter, length, jaw (maxilla/mandible), region (anterior/posterior), and time of functional loading. The results showed that both BIC and BAFO increased over time independently of implant design/clinical variables, supporting the postulated hypothesis.
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Affiliation(s)
- Luiz F Gil
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Marcelo Suzuki
- Department of Prosthodontics and Operative Dentistry, Tufts University School of Dental Medicine, Boston, Massachusetts
| | - Malvin N Janal
- Department of Epidemiology, New York University College of Dentistry, New York, New York
| | - Nick Tovar
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York
| | - Charles Marin
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.,Department of Dentistry, UNIGRANRIO, Duque de Caxias, Rio de Janeiro, Brazil
| | - Rodrigo Granato
- Department of Dentistry, UNIGRANRIO, Duque de Caxias, Rio de Janeiro, Brazil
| | - Estevam A Bonfante
- Department of Prosthodontics, University of Sao Paulo, Bauru College of Dentistry, Bauru, São Paulo, Brazil
| | - Ryo Jimbo
- Department of Prosthodontics, Malmo University, Sweden
| | - Jose N Gil
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York.,Director for Research, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York.,Affiliated Faculty, Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
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Beutel BG, Danna NR, Gangolli R, Granato R, Manne L, Tovar N, Coelho PG. Evaluation of bone response to synthetic bone grafting material treated with argon-based atmospheric pressure plasma. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:484-90. [PMID: 25491854 DOI: 10.1016/j.msec.2014.09.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 09/11/2014] [Accepted: 09/30/2014] [Indexed: 11/25/2022]
Abstract
Bone graft materials are utilized to stimulate healing of bone defects or enhance osseointegration of implants. In order to augment these capabilities, various surface modification techniques, including atmospheric pressure plasma (APP) surface treatment, have been developed. This in vivo study sought to assess the effect of APP surface treatment on degradation and osseointegration of Synthograft™, a beta-tricalcium phosphate (β-TCP) synthetic bone graft. The experimental (APP-treated) grafts were subjected to APP treatment with argon for a period of 60s. Physicochemical characterization was performed by environmental scanning electron microscopy, surface energy (SE), and x-ray photoelectron spectroscopy analyses both before and after APP treatment. Two APP-treated and two untreated grafts were surgically implanted into four critical-size calvarial defects in each of ten New Zealand white rabbits. The defect samples were explanted after four weeks, underwent histological analysis, and the percentages of bone, soft tissue, and remaining graft material were quantified by image thresholding. Material characterization showed no differences in particle surface morphology and that the APP-treated group presented significantly higher SE along with higher amounts of the base material chemical elements on it surface. Review of defect composition showed that APP treatment did not increase bone formation or reduce the amount of soft tissue filling the defect when compared to untreated material. Histologic cross-sections demonstrated osteoblastic cell lines, osteoid deposition, and neovascularization in both groups. Ultimately, argon-based APP treatment did not enhance the osseointegration or degradation of the β-TCP graft. Future investigations should evaluate the utility of gases other than argon to enhance osseointegration through APP treatment.
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Affiliation(s)
- Bryan G Beutel
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA.
| | - Natalie R Danna
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
| | - Riddhi Gangolli
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
| | - Rodrigo Granato
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
| | - Lakshmiprada Manne
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
| | - Nick Tovar
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
| | - Paulo G Coelho
- New York University, Department of Biomaterials and Biomimetics, 345 East 24th Street, Room 804 S, New York, NY 10010, USA
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Marin C, Bonfante EA, Jeong R, Granato R, Giro G, Suzuki M, Heitz C, Coelho PG. Histologic and Biomechanical Evaluation of 2 Resorbable-Blasting Media Implant Surfaces at Early Implantation Times. J ORAL IMPLANTOL 2013; 39:445-53. [DOI: 10.1563/aaid-joi-d-10-00156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study evaluated 3 implant surfaces in a dog model: (1) resorbable-blasting media + acid-etched (RBMa), alumina-blasting + acid-etching (AB/AE), and AB/AE + RBMa (hybrid). All of the surfaces were minimally rough, and Ca and P were present for the RBMa and hybrid surfaces. Following 2 weeks in vivo, no significant differences were observed for torque, bone-to-implant contact, and bone-area fraction occupied measurements. Newly formed woven bone was observed in proximity with all surfaces.
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Affiliation(s)
- Charles Marin
- Postgraduate Program in Dentistry, UNIGRANRIO University, School of Health Sciences, Duque de Caxias, RJ, Brazil
| | - Estevam A. Bonfante
- Postgraduate Program in Dentistry, UNIGRANRIO University, School of Health Sciences, Duque de Caxias, RJ, Brazil
| | - Ryan Jeong
- Department of Biomaterials and Biomimetics, New York University, New York, NY
| | - Rodrigo Granato
- Postgraduate Program in Dentistry, UNIGRANRIO University, School of Health Sciences, Duque de Caxias, RJ, Brazil
| | - Gabriela Giro
- Department of Oral Surgery and Diagnosis, Faculdade de Odontologia de Araraquara, UNESP, Araraquara, SP, Brazil
| | - Marcelo Suzuki
- Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Mass
| | - Claiton Heitz
- Department of Oral and Maxillofacial Surgery, Pontificia Universidade Catolica do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Paulo G. Coelho
- Department of Biomaterials and Biomimetics, New York University, New York, NY
- Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY
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Irish J, Virdi AS, Sena K, McNulty MA, Sumner DR. Implant placement increases bone remodeling transiently in a rat model. J Orthop Res 2013; 31:800-6. [PMID: 23280449 DOI: 10.1002/jor.22294] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/22/2012] [Indexed: 02/04/2023]
Abstract
To examine bone remodeling following implant placement, 88 female Sprague-Dawley rats underwent either sham ovariectomy (sham-ovx) or ovariectomy (ovx) at 4.5 months. At 11 months, 17 baseline control animals were euthanized, while 71 rats received bilateral intramedullary femoral implants. Implanted rats were randomized to 4-, 8-, or 12-week follow-up times. Microcomputed tomography was used to assess cortical area and trabecular architecture in all rats. Dynamic and static histomorphometry were performed in a subset to examine the trabecular and endocortical bone in the distal femoral metaphysis adjacent to the implant and the periosteal surface at the midshaft superior to the implant (n = 59). Implantation did not affect bone volume in either sham-ovx or ovx rats compared to baseline controls. Implant placement significantly increased mineralizing surface, mineral apposition rate, and bone formation rate in both sham-ovx and ovx rats at the trabecular and endocortical surfaces at four and sometimes 8 weeks, with a return to baseline values by 12 weeks. At the periosteal surface, implant placement increased bone formation at 4 weeks with a return to baseline levels by 8 weeks. Thus, implant placement increases bone remodeling transiently without affecting bone volume in sham-ovx and ovx rats.
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Affiliation(s)
- John Irish
- Department of Anatomy & Cell Biology, Rush University Medical Center, 600 South Paulina, Suite 507, Chicago, IL 60612, USA
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Baldassarri M, Bonfante E, Suzuki M, Marin C, Granato R, Tovar N, Coelho PG. Mechanical properties of human bone surrounding plateau root form implants retrieved after 0.3-24 years of function. J Biomed Mater Res B Appl Biomater 2012; 100:2015-21. [DOI: 10.1002/jbm.b.32786] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 05/24/2012] [Accepted: 06/15/2012] [Indexed: 11/08/2022]
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12
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Giro G, Tovar N, Witek L, Marin C, Silva NRF, Bonfante EA, Coelho PG. Osseointegration assessment of chairside argon-based nonthermal plasma-treated Ca-P coated dental implants. J Biomed Mater Res A 2012; 101:98-103. [PMID: 22826209 DOI: 10.1002/jbm.a.34304] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 03/06/2012] [Accepted: 04/23/2012] [Indexed: 11/11/2022]
Abstract
This study investigated the effect of an Argon-based nonthermal plasma (NTP) surface treatment-operated chairside at atmospheric pressure conditions applied immediately prior to dental implant placement in a canine model. Surfaces investigated comprised: Calcium-Phosphate (CaP) and CaP + NTP (CaP-Plasma). Surface energy was characterized by the Owens-Wendt-Rabel-Kaelble method and chemistry by X-ray photoelectron spectroscopy (XPS). Six adult beagles dogs received 2 plateau-root form implants (n = 1 each surface) in each radii, providing implants that remained 1 and 3 weeks in vivo. Histometric parameters assessed were bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO). Statistical analysis was performed by Kruskall-Wallis (95% level of significance) and Dunn's post-hoc test. The XPS analysis showed peaks of Ca, C, O, and P for the CaP and CaP-Plasma surfaces. Both surfaces presented carbon primarily as hydrocarbon (C-C, C-H) with lower levels of oxidized carbon forms. The CaP surface presented atomic percent values of 38, 42, 11, and 7 for C, O, Ca, and P, respectively, and the CaP-Plasma presented increases in O, Ca, and P atomic percent levels at 53, 12, and 13, respectively, in addition to a decrease in C content at 18 atomic percent. At 1 week no difference was found in histometric parameters between groups. At 3 weeks significantly higher BIC and BAFO were observed for CaP-Plasma treated surfaces. Surface elemental chemistry was modified by the Ar-based NTP. Ar-based NTP improved bone formation around plateau-root form implants at 3 weeks compared with CaP treatment alone.
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Affiliation(s)
- Gabriela Giro
- Department of Oral Diagnosis and Surgery, Araraquara Dental School, UNESP-Universidade Estadual Paulista, Araraquara, SP, Brazil
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Experimental study of bone response to hydroxyapatite coating implants: bone-implant contact and removal torque test. Oral Surg Oral Med Oral Pathol Oral Radiol 2012; 114:411-8. [PMID: 22749706 DOI: 10.1016/j.oooo.2011.10.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 10/04/2011] [Accepted: 10/09/2011] [Indexed: 11/23/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the early osseointegration of hydroxyapatite (HA)-coated implant. STUDY DESIGN Twelve adult male miniature pigs were used in this study. The removal torque of implants placed in the tibia of miniature pigs was measured. For implants placed in the mandible, histomorphometric evaluation was performed for the evaluation of the bone-implant contact (BIC) ratio. RESULTS After 4, 8, and 12 weeks, removal torque values were increased. Among the 3 groups, the HA-coated group showed the highest values (P < .05). At 4 and 8 weeks, the BIC ratio of HA was significantly higher than that of resorbable blast medium or sand blasted with alumina and acid etched (P < .05). CONCLUSIONS It was concluded that HA-coated implants are relatively favorable in early loading stages.
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Coelho PG, Giro G, Teixeira HS, Marin C, Witek L, Thompson VP, Tovar N, Silva NRFA. Argon-based atmospheric pressure plasma enhances early bone response to rough titanium surfaces. J Biomed Mater Res A 2012; 100:1901-6. [PMID: 22492543 DOI: 10.1002/jbm.a.34127] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 01/21/2012] [Accepted: 02/07/2012] [Indexed: 11/08/2022]
Abstract
This study investigated the effect of an Argon-based atmospheric pressure plasma (APP) surface treatment operated chairside at atmospheric pressure conditions applied immediately prior to dental implant placement in a canine model. Surfaces investigated comprised: rough titanium surface (Ti) and rough titanium surface + Argon-based APP (Ti-Plasma). Surface energy was characterized by the Owens-Wendt-Rabel-Kaelble method and chemistry by X-ray photoelectron spectroscopy (XPS). Six adult beagles dogs received two plateau-root form implants (n = 1 each surface) in each radii, providing implants that remained 1 and 3 weeks in vivo. Histometric parameters assessed were bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO). Statistical analysis was performed by Kruskall-Wallis (95% level of significance) and Dunn's post-hoc test. The XPS analysis showed peaks of Ti, C, and O for the Ti and Ti- Plasma surfaces. Both surfaces presented carbon primarily as hydrocarbon (C-C, C-H) with lower levels of oxidized carbon forms. The Ti-Plasma presented large increase in the Ti (+11%) and O (+16%) elements for the Ti- Plasma group along with a decrease of 23% in surface-adsorbed C content. At 1 week no difference was found in histometric parameters between groups. At 3 weeks significantly higher BIC (>300%) and mean BAFO (>30%) were observed for Ti-Plasma treated surfaces. From a morphologic standpoint, improved interaction between connective tissue was observed at 1 week, likely leading to more uniform and higher bone formation at 3 weeks for the Ti-Plasma treated implants was observed.
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Affiliation(s)
- Paulo G Coelho
- Department of Biomaterials and Biomimetics, New York University, New York, New York 10010, USA.
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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.
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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)
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