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Fernandes F, Oliveira S, Monteiro F, Gasik M, Silva FS, Sousa N, Carvalho Ó, Catarino SO. Devices used for photobiomodulation of the brain-a comprehensive and systematic review. J Neuroeng Rehabil 2024; 21:53. [PMID: 38600582 PMCID: PMC11007916 DOI: 10.1186/s12984-024-01351-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 04/02/2024] [Indexed: 04/12/2024] Open
Abstract
A systematic review was conducted to determine the trends in devices and parameters used for brain photobiomodulation (PBM). The revised studies included clinical and cadaveric approaches, in which light stimuli were applied to the head and/or neck. PubMed, Scopus, Web of Science and Google Scholar databases were used for the systematic search. A total of 2133 records were screened, from which 97 were included in this review. The parameters that were extracted and analysed in each article were the device design, actuation area, actuation site, wavelength, mode of operation, power density, energy density, power output, energy per session and treatment time. To organize device information, 11 categories of devices were defined, according to their characteristics. The most used category of devices was laser handpieces, which relate to 21% of all devices, while 28% of the devices were not described. Studies for cognitive function and physiological characterisation are the most well defined ones and with more tangible results. There is a lack of consistency when reporting PBM studies, with several articles under defining the stimulation protocol, and a wide variety of parameters used for the same health conditions (e.g., Alzheimer's or Parkinson's disease) resulting in positive outcomes. Standardization for the report of these studies is warranted, as well as sham-controlled comparative studies to determine which parameters have the greatest effect on PBM treatments for different neurological conditions.
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Affiliation(s)
- Filipa Fernandes
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal.
| | - Sofia Oliveira
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
| | - Francisca Monteiro
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
| | - Michael Gasik
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University Foundation, Espoo, Finland
| | - Filipe S Silva
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
- LABBELS-Associate Laboratory, Braga, Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), University of Minho, 4710-057, Braga, Portugal
- ICVS/3BS, PT Government Associate Laboratory, 4710-057, Braga, Portugal
- 2CA-Braga, CVS/3BS, PT Government Associate Laboratory, 4710-057, Braga, Portugal
| | - Óscar Carvalho
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
- LABBELS-Associate Laboratory, Braga, Guimarães, Portugal
| | - Susana O Catarino
- Center for Micro-ElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal.
- LABBELS-Associate Laboratory, Braga, Guimarães, Portugal.
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Melo-Fonseca F, Gasik M, Cruz A, Moreira D, S. Silva F, Miranda G, Mendes Pinto I. Engineering a Hybrid Ti6Al4V-Based System for Responsive and Consistent Osteogenesis. ACS Omega 2024; 9:8985-8994. [PMID: 38434873 PMCID: PMC10905591 DOI: 10.1021/acsomega.3c07232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/17/2023] [Accepted: 01/05/2024] [Indexed: 03/05/2024]
Abstract
As the aging population increases worldwide, the incidence of musculoskeletal diseases and the need for orthopedic implants also arise. One of the most desirable goals in orthopedic reconstructive therapies is de novo bone formation. Yet, reproducible, long-lasting, and cost-effective strategies for implants that strongly induce osteogenesis are still in need. Nanoengineered titanium substrates (and their alloys) are among the most used materials in orthopedic implants. Although having high biocompatibility, titanium alloys hold a low bioactivity profile. The osteogenic capacity and osseointegration of Ti-based implantable systems are limited, as they critically depend on the body-substrate interactions defined by blood proteins adsorbed into implant surfaces that ultimately lead to the recruitment, proliferation, and differentiation of mesenchymal stem cells (MSCs) to comply bone formation and regeneration. In this work, a hybrid Ti6Al4V system combining micro- and nanoscale modifications induced by hydrothermal treatment followed by functionalization with a bioactive compound (fibronectin derived from human plasma) is proposed, aiming for bioactivity improvement. An evaluation of the biological activity and cellular responses in vitro with respect to bone regeneration indicated that the integration of morphological and chemical modifications into Ti6Al4V surfaces induces the osteogenic differentiation of MSCs to improve bone regeneration by an enhancement of mineral matrix formation that accelerates the osseointegration process. Overall, this hybrid system has numerous competitive advantages over more complex treatments, including reproducibility, low production cost, and potential for improved long-term maintenance of the implant.
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Affiliation(s)
- Francisca Melo-Fonseca
- Center
for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Guimarães 4800-058, Portugal
- LABBELS—Associate
Laboratory, Braga, Guimarães 4710-057, Portugal
- International
Iberian Nanotechnology Laboratory (INL), Braga 4715-330, Portugal
| | - Michael Gasik
- School
of Chemical Engineering, Aalto University
Foundation, Espoo 00076, Finland
| | - Andrea Cruz
- International
Iberian Nanotechnology Laboratory (INL), Braga 4715-330, Portugal
| | - Daniel Moreira
- Institute
for Research and Innovation in Health (i3S), Porto 4200-135, Portugal
| | - Filipe S. Silva
- Center
for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Guimarães 4800-058, Portugal
- LABBELS—Associate
Laboratory, Braga, Guimarães 4710-057, Portugal
| | - Georgina Miranda
- CICECO, Aveiro
Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Aveiro 3810-193, Portugal
| | - Inês Mendes Pinto
- International
Iberian Nanotechnology Laboratory (INL), Braga 4715-330, Portugal
- Institute
for Research and Innovation in Health (i3S), Porto 4200-135, Portugal
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Pascoal S, Oliveira S, Monteiro F, Padrão J, Costa R, Zille A, Catarino SO, Silva FS, Pinho T, Carvalho Ó. Influence of Ultrasound Stimulation on the Viability, Proliferation and Protein Expression of Osteoblasts and Periodontal Ligament Fibroblasts. Biomedicines 2024; 12:361. [PMID: 38397963 PMCID: PMC10886604 DOI: 10.3390/biomedicines12020361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 02/25/2024] Open
Abstract
Among the adjunctive procedures to accelerate orthodontic tooth movement (OTM), ultrasound (US) is a nonsurgical form of mechanical stimulus that has been explored as an alternative to the currently available treatments. This study aimed to clarify the role of US in OTM by exploring different stimulation parameters and their effects on the biological responses of cells involved in OTM. Human fetal osteoblasts and periodontal ligament fibroblasts cell lines were stimulated with US at 1.0 and 1.5 MHz central frequencies and power densities of 30 and 60 mW/cm2 in continuous mode for 5 and 10 min. Cellular proliferation, metabolic activity and protein expression were analyzed. The US parameters that significantly improved the metabolic activity were 1.0 MHz at 30 mW/cm2 for 5 min and 1.0 MHz at 60 mW/cm2 for 5 and 10 min for osteoblasts; and 1.0 MHz at 30 mW/cm2 for 5 min and 1.5 MHz at 60 mW/cm2 for 5 and 10 min for fibroblasts. By stimulating with these parameters, the expression of alkaline phosphatase was maintained, while osteoprotegerin synthesis was induced after three days of US stimulation. The US stimulation improved the biological activity of both osteoblasts and periodontal ligament fibroblasts, inducing their osteogenic differentiation.
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Affiliation(s)
- Selma Pascoal
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (S.P.)
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
| | - Sofia Oliveira
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
| | - Francisca Monteiro
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
| | - Jorge Padrão
- Center for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal; (J.P.); (A.Z.)
| | - Rita Costa
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (S.P.)
| | - Andrea Zille
- Center for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal; (J.P.); (A.Z.)
| | - Susana O. Catarino
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - Filipe S. Silva
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - Teresa Pinho
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (S.P.)
- IBMC—Instituto Biologia Molecular e Celular, i3S—Inst. Inovação e Investigação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Óscar Carvalho
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal (S.O.C.); (Ó.C.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
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Gonçalves A, Monteiro F, Oliveira S, Costa I, Catarino SO, Carvalho Ó, Padrão J, Zille A, Pinho T, Silva FS. Optimization of a Photobiomodulation Protocol to Improve the Cell Viability, Proliferation and Protein Expression in Osteoblasts and Periodontal Ligament Fibroblasts for Accelerated Orthodontic Treatment. Biomedicines 2024; 12:180. [PMID: 38255285 PMCID: PMC10813108 DOI: 10.3390/biomedicines12010180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/08/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
Numerous pieces of evidence have supported the therapeutic potential of photobiomodulation (PBM) to modulate bone remodeling on mechanically stimulated teeth, proving PBM's ability to be used as a coadjuvant treatment to accelerate orthodontic tooth movement (OTM). However, there are still uncertainty and discourse around the optimal PBM protocols, which hampers its optimal and consolidated clinical applicability. Given the differential expression and metabolic patterns exhibited in the tension and compression sides of orthodontically stressed teeth, it is plausible that different types of irradiation may be applied to each side of the teeth. In this sense, this study aimed to design and implement an optimization protocol to find the most appropriate PBM parameters to stimulate specific bone turnover processes. To this end, three levels of wavelength (655, 810 and 940 nm), two power densities (5 and 10 mW/cm2) and two regimens of single and multiple sessions within three consecutive days were tested. The biological response of osteoblasts and periodontal ligament (PDL) fibroblasts was addressed by monitoring the PBM's impact on the cellular metabolic activity, as well as on key bone remodeling mediators, including alkaline phosphatase (ALP), osteoprotegerin (OPG) and receptor activator of nuclear factor κ-B ligand (RANK-L), each day. The results suggest that daily irradiation of 655 nm delivered at 10 mW/cm2, as well as 810 and 940 nm light at 5 mW/cm2, lead to an increase in ALP and OPG, potentiating bone formation. In addition, irradiation of 810 nm at 5 mW/cm2 delivered for two consecutive days and suspended by the third day promotes a downregulation of OPG expression and a slight non-significant increase in RANK-L expression, being suitable to stimulate bone resorption. Future studies in animal models may clarify the impact of PBM on bone formation and resorption mediators for longer periods and address the possibility of testing different stimulation periodicities. The present in vitro study offers valuable insights into the effectiveness of specific PBM protocols to promote osteogenic and osteoclastogenesis responses and therefore its potential to stimulate bone formation on the tension side and bone resorption on the compression side of orthodontically stressed teeth.
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Affiliation(s)
- Aline Gonçalves
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (A.G.); (I.C.); (T.P.)
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
| | - Francisca Monteiro
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
- ICVS/3B’s-PT Government Associate Laboratory, 4710-057 Braga, Portugal
| | - Sofia Oliveira
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
| | - Inês Costa
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (A.G.); (I.C.); (T.P.)
| | - Susana O. Catarino
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - Óscar Carvalho
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
| | - Jorge Padrão
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Azurém Campus, 4800-058 Guimarães, Portugal; (J.P.); (A.Z.)
| | - Andrea Zille
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Azurém Campus, 4800-058 Guimarães, Portugal; (J.P.); (A.Z.)
| | - Teresa Pinho
- UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal; (A.G.); (I.C.); (T.P.)
- IBMC—Instituto Biologia Molecular e Celular, i3S—Instituto de Inovação e Investigação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Filipe S. Silva
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal; (S.O.); (S.O.C.); (Ó.C.); (F.S.S.)
- LABBELS—Associate Laboratory, 4710-057 Braga, Portugal
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5
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Gomes E, Andrade R, Valente C, Santos JV, Nunes J, Carvalho Ó, Correlo VM, Silva FS, Oliveira JM, Reis RL, Espregueira-Mendes J. Inconsistency in Shoulder Arthrometers for Measuring Glenohumeral Joint Laxity: A Systematic Review. Bioengineering (Basel) 2023; 10:799. [PMID: 37508826 PMCID: PMC10376824 DOI: 10.3390/bioengineering10070799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
There is no consensus on how to measure shoulder joint laxity and results reported in the literature are not well systematized for the available shoulder arthrometer devices. This systematic review aims to summarize the results of currently available shoulder arthrometers for measuring glenohumeral laxity in individuals with healthy or injured shoulders. Searches were conducted on the PubMed, EMBASE, and Web of Science databases to identify studies that measure glenohumeral laxity with arthrometer-assisted assessment. The mean and standard deviations of the laxity measurement from each study were compared based on the type of population and arthrometer used. Data were organized according to the testing characteristics. A total of 23 studies were included and comprised 1162 shoulders. Populations were divided into 401 healthy individuals, 278 athletes with asymptomatic shoulder, and 134 individuals with symptomatic shoulder. Sensors were the most used method for measuring glenohumeral laxity and stiffness. Most arthrometers applied an external force to the humeral head or superior humerus by a manual-assisted mechanism. Glenohumeral laxity and stiffness were mostly assessed in the sagittal plane. There is substantial heterogeneity in glenohumeral laxity values that is mostly related to the arthrometer used and the testing conditions. This variability can lead to inconsistent results and influence the diagnosis and treatment decision-making.
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Affiliation(s)
- Eluana Gomes
- Clínica Espregueira-FIFA Medical Centre of Excellence, 4350-415 Porto, Portugal
| | - Renato Andrade
- Clínica Espregueira-FIFA Medical Centre of Excellence, 4350-415 Porto, Portugal
- Dom Henrique Research Centre, 4350-415 Porto, Portugal
- Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sports, University of Porto, 4200-450 Porto, Portugal
| | - Cristina Valente
- Clínica Espregueira-FIFA Medical Centre of Excellence, 4350-415 Porto, Portugal
- Dom Henrique Research Centre, 4350-415 Porto, Portugal
| | - J Victor Santos
- Centre for Microelectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Jóni Nunes
- Clínica Espregueira-FIFA Medical Centre of Excellence, 4350-415 Porto, Portugal
- Serviço de Ortopedia e Traumatologia do Hospital de Santa Maria Maior, 4750-333 Barcelos, Portugal
- School of Medicine, University of Minho, 4710-057 Braga, Portugal
| | - Óscar Carvalho
- Centre for Microelectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4800-058 Guimarães, Portugal
| | - Vitor M Correlo
- ICVS/3B's-PT Government Associate Laboratory, 4805-017 Guimarães, Portugal
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência E Tecnologia, University of Minho, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
- Pro2B, Consultoria e Gestão de Projetos, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
| | - Filipe S Silva
- Centre for Microelectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4800-058 Guimarães, Portugal
| | - J Miguel Oliveira
- ICVS/3B's-PT Government Associate Laboratory, 4805-017 Guimarães, Portugal
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência E Tecnologia, University of Minho, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
| | - Rui L Reis
- ICVS/3B's-PT Government Associate Laboratory, 4805-017 Guimarães, Portugal
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência E Tecnologia, University of Minho, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
| | - João Espregueira-Mendes
- Clínica Espregueira-FIFA Medical Centre of Excellence, 4350-415 Porto, Portugal
- Dom Henrique Research Centre, 4350-415 Porto, Portugal
- School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4805-017 Guimarães, Portugal
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência E Tecnologia, University of Minho, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal
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Gonçalves A, Collard A, Monteiro F, Matos D, Carvalho Ó, Azevedo R, Silva FS, Pinho T. Accuracy of Invisalign ® on Upper Incisors: A Systematic Review. Turk J Orthod 2023; 36:126-133. [PMID: 37346374 PMCID: PMC10318852 DOI: 10.4274/turkjorthod.2022.2021.0254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 06/04/2022] [Indexed: 02/22/2023]
Abstract
The current systematic review appraises the effectiveness of the types of tooth movements performed with Invisalign® clear aligner on the maxillary incisors. An electronic literature search of published trials was performed through PubMed, LILACS, Scopus, Cochrane Library, and Web of Science databases, and selected journals, from 2009 to 2020. Out of 291 references, five relevant publications were identified for analysis: four studies were performed retrospectively and one prospectively, all non-randomized. Despite the limited set of selected articles, the sample size is significant, with 148 subjects included in the reviewed studies involving the orthodontic treatment of upper incisors. We concluded that movements with the Invisalign® clear aligner on the upper incisors present distinct accuracy, possibly related with movement complexity; intrusion of the incisors has low accuracy (in some cases, 0% of accuracy was reported when the tooth extruded), while incisor extrusion exhibit some of the highest accuracy values reported in the included studies (45%-142%, when the achieved movement was greater than the predicted). Besides, axial (i.e., torque and tip) and horizontal (i.e., translation and rotation) movements are usually effective, with accuracy values between 39%-156% and 42%-79%, respectively. Overall, we determined that the efficiency of aligner to reach the desired movements in the upper incisors was low, as often refinements were required in the included studies. The use of aligner features must be more often considered to improve movement accuracy.
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Affiliation(s)
- Aline Gonçalves
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, Guimarães, Portugal
| | - Athénaïs Collard
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Francisca Monteiro
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, Guimarães, Portugal
- Life and Health Sciences Research Institute (ICVS), Medical School, University of Minho, Campus Gualtar, Braga, Portugal
- LABBELS - Associate Laboratory, Braga, Guimarães, Portugal
| | - David Matos
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - Óscar Carvalho
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, Guimarães, Portugal
- LABBELS - Associate Laboratory, Braga, Guimarães, Portugal
| | - Rui Azevedo
- TOXRUN, Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Gandra, Portugal
| | - Filipe S. Silva
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, Guimarães, Portugal
- LABBELS - Associate Laboratory, Braga, Guimarães, Portugal
| | - Teresa Pinho
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
- IBMC - Instituto Biologia Molecular e Celular, i3S - Inst. Inovação e Investigação em Saúde, Universidade do Porto, Porto, Portugal
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Gonçalves A, Ayache S, Monteiro F, Silva FS, Pinho T. Efficiency of Invisalign First® to promote expansion movement in mixed dentition: a retrospective study and systematic review. Eur J Paediatr Dent 2023. [PMID: 37038757 DOI: 10.23804/ejpd.2023.1754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Aim The present study aimed: i) to retrospectively evaluate the expansion movement predicted by the Clincheck® software and the achieved expansion using Invisalign First® in children needing maxillary expansion to correct malocclusions; and ii) to critically compare these clinical results with the outcomes obtained for maxillary expansion using conventional removable and cemented expanders. Material and Methods The 3D digital models of the dental arches of 24 children undergoing orthodontic treatment exclusively with Invisalign First® aligners between 2018 and 2021 were sequentially selected for this study. Three digital models were analysed: pre-treatment (P0), the Clincheck®-predicted tooth positions (P1), and post-treatment (P2) models. The maxillary dental arch width and expansion efficiency were measured andcalculated. An in-depth review of the available literature on maxillary expansion was performed following PRISMA guidelines. Results Invisalign First® was able to achieve a total effectiveness of maxillary expansion of 62.6%, compared to the predicted movement. Similarly, the total effectiveness of mandibular expansion was 61.6%. Conclusions Our data shows that Invisalign First® system can increase the arch width with maxillary expansion effectiveness, providing similar results to those achieved with conventional removable appliances. However, neither Invisalign First® aligners nor conventional removable expanders are as much efficient as cemented-retained appliances.
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Affiliation(s)
- A Gonçalves
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal - Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - S Ayache
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal - Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
| | - F Monteiro
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga, Guimarães, Portugal
- LABBELS - Associate Laboratory, Braga, Guimarães, Portugal
| | - F S Silva
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
- LABBELS - Associate Laboratory, Braga, Guimarães, Portugal
| | - T Pinho
- UNIPRO - Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal - Center for MicroElectroMechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- IBMC - Instituto Biologia Molecular e Celular, i3S - Inst. Inovação e Investigação em Saúde, Universidade do Porto, Porto, Portugal
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8
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Magalhães T, Fidalgo-Pereira R, Torres O, Carvalho Ó, Silva FS, Henriques B, Özcan M, Souza JCM. Microscopic Inspection of the Adhesive Interface of Composite Onlays after Cementation on Low Loading: An In Vitro Study. J Funct Biomater 2023; 14:jfb14030148. [PMID: 36976072 PMCID: PMC10058625 DOI: 10.3390/jfb14030148] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/22/2023] [Accepted: 03/02/2023] [Indexed: 03/12/2023] Open
Abstract
Purpose: This study aimed to assess the layer thickness and microstructure of traditional resin-matrix cements and flowable resin-matrix composites at dentin and enamel to composite onlay interfaces after cementation on low loading magnitude. Materials and Methods: Twenty teeth were prepared and conditioned with an adhesive system for restoration with resin-matrix composite onlays manufactured by CAD-CAM. On cementation, tooth-to-onlay assemblies were distributed into four groups, including two traditional resin-matrix cements (groups M and B), one flowable resin-matrix composite (group G), and one thermally induced flowable composite (group V). After the cementation procedure, assemblies were cross-sectioned for inspection by optical microscopy at different magnification up to ×1000. Results: The layer thickness of resin-matrix cementation showed the highest mean values at around 405 µm for a traditional resin-matrix cement (group B). The thermally induced flowable resin-matrix composites showed the lowest layer thickness values. The resin-matrix layer thickness revealed statistical differences between traditional resin cement (groups M and B) and flowable resin-matrix composites (groups V and G) (p < 0.05). However, the groups of flowable resin-matrix composites did not reveal statistical differences (p < 0.05). The thickness of the adhesive system layer at around 7 µm and 12 µm was lower at the interfaces with flowable resin-matrix composites when compared to the adhesive layer at resin-matrix cements, which ranged from 12 µm up to 40 µm. Conclusions: The flowable resin-matrix composites showed adequate flowing even though the loading on cementation was performed at low magnitude. Nevertheless, significant variation in thickness of the cementation layer was noticed for flowable resin-matrix composites and traditional resin-matrix cements that can occur in chair-side procedures due to the clinical sensitivity and differences in rheological properties of the materials.
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Affiliation(s)
- Tiago Magalhães
- University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
| | - Rita Fidalgo-Pereira
- Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa (UCP), 3504-505 Viseu, Portugal
| | - Orlanda Torres
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
| | - Óscar Carvalho
- Centre for MicroElectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4710-057 Braga, Portugal
| | - Filipe S. Silva
- Centre for MicroElectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4710-057 Braga, Portugal
| | - Bruno Henriques
- Centre for MicroElectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4710-057 Braga, Portugal
- Ceramic and Composite Materials Research Group (CERMAT), Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Mutlu Özcan
- Division of Dental Biomaterials, Center of Dental Medicine, Clinic of Reconstructive Dentistry, University of Zurich, 8032 Zurich, Switzerland
| | - Júlio C. M. Souza
- University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
- Centre for MicroElectromechanical Systems (CMEMS-UMINHO), Campus Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4710-057 Braga, Portugal
- Correspondence:
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9
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Fidalgo-Pereira R, Torres O, Carvalho Ó, Silva FS, Catarino SO, Özcan M, Souza JCM. A Scoping Review on the Polymerization of Resin-Matrix Cements Used in Restorative Dentistry. Materials (Basel) 2023; 16:1560. [PMID: 36837188 PMCID: PMC9961405 DOI: 10.3390/ma16041560] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
In dentistry, clinicians mainly use dual-cured or light-cured resin-matrix cements to achieve a proper polymerization of the organic matrix leading to enhanced physical properties of the cement. However, several parameters can affect the polymerization of resin-matrix cements. The main aim of the present study was to perform a scoping review on the degree of conversion (DC) of the organic matrix, the polymerization, and the light transmittance of different resin-matrix cements used in dentistry. A search was performed on PubMed using a combination of the following key terms: degree of conversion, resin cements, light transmittance, polymerization, light curing, and thickness. Articles in the English language published up to November 2022 were selected. The selected studies' results demonstrated that restorative structures with a thickness higher than 1.5 mm decrease the light irradiance towards the resin-matrix cement. A decrease in light transmission provides a low energy absorption through the resin cement leading to a low DC percentage. On the other hand, the highest DC percentages, ranging between 55 and 75%, have been reported for dual-cured resin-matrix cements, although the polymerization mode and exposure time also influence the DC of monomers. Thus, the polymerization of resin-matrix cements can be optimized taking into account different parameters of light-curing, such as adequate light distance, irradiance, exposure time, equipment, and wavelength. Then, optimum physical properties are achieved that provide a long-term clinical performance of the cemented restorative materials.
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Affiliation(s)
- Rita Fidalgo-Pereira
- University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
- Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa (UCP), 3504-505 Viseu, Portugal
| | - Orlanda Torres
- University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - Óscar Carvalho
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4805-017 Guimarães, Portugal
| | - Filipe S. Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4805-017 Guimarães, Portugal
| | - Susana O. Catarino
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4805-017 Guimarães, Portugal
| | - Mutlu Özcan
- Division of Dental Biomaterials, Center of Dental Medicine, Clinic of Reconstructive Dentistry, University of Zurich, 8032 Zurich, Switzerland
| | - Júlio C. M. Souza
- University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal
- LABBELS Associate Laboratory, University of Minho, 4805-017 Guimarães, Portugal
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10
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Bartolomeu F, Carvalho O, Gasik M, Silva FS. Multi-functional Ti6Al4V-CoCrMo implants fabricated by multi-material laser powder bed fusion technology: A disruptive material's design and manufacturing philosophy. J Mech Behav Biomed Mater 2023; 138:105583. [PMID: 36442369 DOI: 10.1016/j.jmbbm.2022.105583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/27/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022]
Abstract
A home-made 3D Multi-Material Laser Powder Bed Fusion (3DMMLPBF) technology was exploited to manufacture novel multi-material Ti6Al4V-CoCrMo parts. This multi-material concept aims to bring to life a new and disruptive material's design concept for the acetabular cup. Only using a layer-by-layer approach it is possible to manufacture an acetabular cup capable to combine CoCrMo alloy wear resistance and Ti6Al4V alloy bone-friendly nature, in a single component, fabricated at once. This system works with multiple powder deposition functions and vacuum cleaning procedures allowing to use two different powders (Ti6Al4V and CoCrMo) in each layer and thus, allowing to construct 3D Multi-Material transition between distinct materials, point-by-point and layer-by-layer. In this sense, the manufacturing strategies and the functional transition between Ti6Al4V and CoCrMo with a mechanical interlocking were analyzed and discussed both from mechanical and metallurgical point of view. A small diffusion area and no evidence of defects or cracks can be found in the transition's regions between the distinct materials which are strong evidences of a solid metallurgical bonding at the interfacial regions of Ti6Al4V and CoCrMo materials. A functional transition is also obtained through a design capable to provide a 3D mechanical interlocking with potential of assuring, simultaneously, tensile and compressive strength. This proof of concept might be a step-ahead in Laser Powder Bed Fusion in which the most desired intrinsic of individual materials can be combined in a single component targeting biomedical disruptive solutions.
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Affiliation(s)
- F Bartolomeu
- Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal.
| | - O Carvalho
- Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
| | - M Gasik
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University Foundation, 00076, Aalto, Espoo, Finland
| | - F S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
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11
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Arnoni CP, Vendrame TAP, Silva FS, Cortez AJP, Latini FRM, Castilho L. RHCE variant alleles and risk of alloimmunization in Brazilians. Immunohematology 2022; 38:123-129. [PMID: 36789463 DOI: 10.21307/immunohematology-2022-054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Variant RHCE alleles are found mainly in Afro-descendant individuals, as well as in patients with sickle cell disease (SCD). The most common variants are related to the RHCE*ce allele, which can generate partial e and c antigens. Although RHCE variant alleles have been extensively studied, defining their clinical significance is a difficult task. We evaluated the risk of RhCE alloimmunization as a consequence of partial antigens in patients with a positive phenotype transfused with red blood cell (RBC) units with the corresponding antigen. A retrospective study was performed with Brazilian patients, evaluating the number of antigen-positive transfused RBC units (incompatible due to partial antigen) in 27 patients with SCD carrying RHCE variant alleles who did not develop antibodies as well as evaluating the variants present in 12 patients with partial phenotype and correlated antibody (one patient with SCD and 11 patients with other pathologies). Two patients showed variant alleles with molecular changes that had not yet been described. Variant RHCE alleles were identified in a previous study using molecular methods. RHCE*ceVS.01 was the most frequent allele found among the patients without antibodies. Six patients with partial c antigen had a mean of 3.8 c+ RBC units transfused, and 10 patients with partial e antigen were exposed for a mean of 7.2 e+ RBC units. Among the variant alleles found in alloimmunized patients, the most frequent was RHCE*ceAR, which was found in five patients; the antibodies developed were anti-hrS and/or anti-c. Our results showed that RHCE*ceVS.01 is indeed the most frequent variant allele in our cohort of patients with SCD, but the partial antigens that were identified have low risk of alloimmunization. RHCE*ceAR is the most impactful variant in the Brazilian population with high risk of alloimmunization and clinically significant anti-hrS formation.
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Affiliation(s)
- C P Arnoni
- Technical and Scientific Department, Colsan-Associação Beneficente de Coleta de Sangue, Avenida Jandira 1260, Indianópolis-CEP 04080-006, São Paulo, SP, Brazil
| | - T A P Vendrame
- Technical and Scientific Department, Colsan- Associação Beneficente de Coleta de Sangue, São Paulo, SP, Brazil
| | - F S Silva
- Technical and Scientific Department, Colsan-Associação Beneficente de Coleta de Sangue, São Paulo, SP, Brazil
| | - A J P Cortez
- Medical Department, Colsan-Associação Beneficente de Coleta de Sangue, São Paulo, SP, Brazil
| | - F R M Latini
- Technical and Scientific Department, Colsan-Associação Beneficente de Coleta de Sangue, São Paulo, SP, Brazil
| | - L Castilho
- Hemocentro-Unicamp, Campinas, SP, Brazil
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12
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Madeira S, Buciumeanu M, Nobre D, Carvalho O, Silva FS. Development of a novel hybrid Ti6Al4V-ZrO 2 surface with high wear resistance by laser and hot pressing techniques for dental implants. J Mech Behav Biomed Mater 2022; 136:105508. [PMID: 36265278 DOI: 10.1016/j.jmbbm.2022.105508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/27/2022] [Accepted: 10/02/2022] [Indexed: 11/06/2022]
Abstract
The development of implant metal-free surfaces has gained attention since non-benefic results have been reported related to the metallic ions released from metal implants to the human body. Ceramic coatings have been proposed as a possible solution however, the detachment of these coatings, during implantation or even in function, can compromise its function. In order to overcome this problem, this work proposes a novel hybrid Ti6Al4V-ZrO2 surface, starting with laser texturing of the Ti6Al4V substrate by Laser Nd:YV04, followed by the allocation of the zirconia (ZrO2) powder and its subsequent sintering by hot pressing process. Results revealed that zirconia strongly adheres to titanium textured surfaces since no detachment was found under tribological and adhesion scratch tests. Moreover, the tribological results showed that the incorporation of zirconia into textured titanium surface reduces significantly the wear rate of titanium (≈93%), which is a good indicator of low metallic particles/ions released to the body. These results suggest that this novel surface with good aesthetic properties and improved wear resistance (given by zirconia) and mechanical resistance (from titanium) can be a promising solution for dental implants, especially for implant/abutment or abutment/ceramic contact zones, and thus have a huge impact on the long-term performance of implants.
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Affiliation(s)
- S Madeira
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal.
| | - M Buciumeanu
- Faculty of Engineering, "Dunărea de Jos" University of Galaţi, Domnească 47, 800008, Galati, Romania
| | - D Nobre
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - O Carvalho
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
| | - F S Silva
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal
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13
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Moraes JDS, Magalhães-Gama F, Silva FS, mas B, Araújo ND, Hanna FSA, Carvalho MDPSS, Tarragô AM, Malheiro A, Costa AG. AVALIAÇÃO DO PERFIL DE ANAFILOTOXINAS EM PACIENTES PEDIÁTRICOS COM LEUCEMIA LINFOBLÁSTICA AGUDA DE CÉLULAS B SUBMETIDOS À QUIMIOTERAPIA DE REMISSÃO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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14
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Silva FS, Magalhães-Gama F, Neves WLL, Garcia NP, Ibiapina HNS, Tarragô AM, Leon EB, Costa AG, Malheiro A, Araújo ND. GRANULOCYTE-COLONY STIMULATING FACTOR (G-CSF) ENHANCES THE MOBILIZATION OF BONE MARROW-DERIVED MESENCHYMAL STEM CELLS IN THE PERIPHERAL BLOOD OF BALB/C MICE. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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15
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Cunha W, Carvalho O, Henriques B, Silva FS, Özcan M, Souza JCM. Surface modification of zirconia dental implants by laser texturing. Lasers Med Sci 2022; 37:77-93. [PMID: 35022871 DOI: 10.1007/s10103-021-03475-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 11/16/2021] [Indexed: 12/19/2022]
Abstract
The aim of this work was to perform an integrative literature review on the influence of laser irradiation on zirconia implants to enhance surface topographic aspects and the biological response for osseointegration. An electronic search was carried out on the PubMed database using the following search terms: "zirconia" AND "laser" AND "surface modification" OR "surface treatment" AND "dental implants" OR "bone" OR "osteoblast" OR "osseointegration." Of the identified articles, 12 studies were selected in this review. Results reported that the laser irradiation was capable of promoting changes on the zirconia surfaces regarding topographic aspects, roughness, and wettability. An increase in roughness was recorded at micro- and nano-scale and it resulted in an enhanced wettability and biological response. Also, adhesion, spreading, proliferation, and differentiation of osteogenic cells were also enhanced after laser irradiation mainly by using a femtosecond laser at 10nJ and 80 MHz. After 3 months of osseointegration, in vivo studies in dogs revealed a similar average percentage of bone-to-implant contact (BIC) on zirconia surfaces (around 47.9 ± 16%) when compared to standard titanium surfaces (61.73 ±16.27%), denoting that there is no significant difference between such different materials. The laser approach revealed several parameters that can be used for zirconia surface modification such as irradiation intensity, time, and frequency. Laser irradiation parameters can be optimized and well-controlled to reach desirable surface morphologic aspects and biological response concerning the osseointegration process.
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Affiliation(s)
- Welson Cunha
- School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal
| | - Oscar Carvalho
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
| | - Bruno Henriques
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal.,Ceramic and Composite Materials Research Group (CERMAT), Dept. of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis, 88040-900, Brazil
| | - Filipe S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
| | - Mutlu Özcan
- Division of Dental Biomaterials, Clinic for Reconstructive Dentistry, Center of Dental Medicine, University of Zürich, Zürich, 8032, Switzerland
| | - Júlio C M Souza
- School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal. .,Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal.
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16
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Monteiro F, Carvalho Ó, Sousa N, Silva FS, Sotiropoulos I. Photobiomodulation and visual stimulation against cognitive decline and Alzheimer's disease pathology: A systematic review. A&D Transl Res & Clin Interv 2022; 8:e12249. [DOI: 10.1002/trc2.12249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 12/01/2021] [Accepted: 12/15/2021] [Indexed: 11/27/2022]
Affiliation(s)
- Francisca Monteiro
- Center for Microelectromechanical Systems (CMEMS) Campus Azurém University of Minho Guimarães Portugal
- ICVS/3B's ‐ PT Government Associate Laboratory Braga/Guimarães Portugal
- LABBELS—Associate Laboratory University of Minho Guimarães Portugal
| | - Óscar Carvalho
- Center for Microelectromechanical Systems (CMEMS) Campus Azurém University of Minho Guimarães Portugal
- LABBELS—Associate Laboratory University of Minho Guimarães Portugal
| | - Nuno Sousa
- ICVS/3B's ‐ PT Government Associate Laboratory Braga/Guimarães Portugal
- Life and Health Sciences Research Institute (ICVS) School of Medicine University of Minho Campus de Gualtar Braga Portugal
| | - Filipe S. Silva
- Center for Microelectromechanical Systems (CMEMS) Campus Azurém University of Minho Guimarães Portugal
- LABBELS—Associate Laboratory University of Minho Guimarães Portugal
| | - Ioannis Sotiropoulos
- ICVS/3B's ‐ PT Government Associate Laboratory Braga/Guimarães Portugal
- Life and Health Sciences Research Institute (ICVS) School of Medicine University of Minho Campus de Gualtar Braga Portugal
- Institute of Biosciences and Applications NCSR Demokritos Athens Greece
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Monteiro F, Oliveira S, Gasik M, Sousa N, Sotiropoulos I, Silva FS, Carvalho Ó. How does the Alzheimer’s disease brain respond to optomechanical stimuli? A narrative review. Brain Stimul 2021. [DOI: 10.1016/j.brs.2021.10.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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18
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Arnoni CP, Vendrame TAP, Silva FS, Cortez AJP, Latini F. DIVERSIDADE DE VARIANTES RHD EM PACIENTES D-POSITIVO QUE DESENVOLVERAM ANTI-D. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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19
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Monteiro F, Sotiropoulos I, Carvalho Ó, Sousa N, Silva FS. Multi-mechanical waves against Alzheimer's disease pathology: a systematic review. Transl Neurodegener 2021; 10:36. [PMID: 34560902 PMCID: PMC8464104 DOI: 10.1186/s40035-021-00256-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/03/2021] [Indexed: 01/18/2023] Open
Abstract
Alzheimer’s disease (AD) is the most common cause of dementia, affecting approximately 40 million people worldwide. The ineffectiveness of the available pharmacological treatments against AD has fostered researchers to focus on alternative strategies to overcome this challenge. Mechanical vibrations delivered in different stimulation modes have been associated with marked improvements in cognitive and physical performance in both demented and non-demented elderly. Some of the mechanical-based stimulation modalities in efforts are earlier whole-body vibration, transcranial ultrasound stimulation with microbubble injection, and more recently, auditory stimulation. However, there is a huge variety of treatment specifications, and in many cases, conflicting results are reported. In this review, a search on Scopus, PubMed, and Web of Science databases was performed, resulting in 37 papers . These studies suggest that mechanical vibrations delivered through different stimulation modes are effective in attenuating many parameters of AD pathology including functional connectivity and neuronal circuit integrity deficits in the brains of AD patients, as well as in subjects with cognitive decline and non-demented older adults. Despite the evolving preclinical and clinical evidence on these therapeutic modalities, their translation into clinical practice is not consolidated yet. Thus, this comprehensive and critical systematic review aims to address the most important gaps in the reviewed protocols and propose optimal regimens for future clinical application.
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Affiliation(s)
- Francisca Monteiro
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal. .,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Ioannis Sotiropoulos
- Life and Health Sciences Research Institute (ICVS), Medical School, University of Minho, Campus Gualtar, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Institute of Biosciences & Applications NCSR "Demokritos", Athens, Greece
| | - Óscar Carvalho
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), Medical School, University of Minho, Campus Gualtar, 4710-057, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Filipe S Silva
- Center for Microelectromechanical Systems (CMEMS), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
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Fabris D, Moura JPA, Fredel MC, Souza JCM, Silva FS, Henriques B. Biomechanical analyses of one-piece dental implants composed of titanium, zirconia, PEEK, CFR-PEEK, or GFR-PEEK: Stresses, strains, and bone remodeling prediction by the finite element method. J Biomed Mater Res B Appl Biomater 2021; 110:79-88. [PMID: 34173713 DOI: 10.1002/jbm.b.34890] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/22/2021] [Accepted: 06/07/2021] [Indexed: 11/06/2022]
Abstract
This work aimed to assess the biomechanics, using the finite element method (FEM), of traditional titanium Morse taper (MT) dental implants compared to one-piece implants composed of zirconia, polyetheretherketone (PEEK), carbon fiber-reinforced PEEK (CFR-PEEK), or glass fiber-reinforced PEEK (GFR-PEEK). MT and one-piece dental implants were modeled within a mandibular bone section and loaded on an oblique force using FEM. A MT implant system involving a Ti6Al4V abutment and a cp-Ti grade IV implant was compared to one-piece implants composed of cp-Ti grade IV, zirconia (3Y-TZP), PEEK, CFR-PEEK, or GFR-PEEK. Stress on bone and implants was computed and analyzed while bone remodeling prediction was evaluated considering equivalent strain. In comparison to one-piece implants, the traditional MT implant revealed higher stress peak (112 MPa). The maximum stresses on the one-piece implants reached ~80 MPa, regardless their chemical composition. MT implant induced lower bone stimulus, although excessive bone strain was recorded for PEEK implants. Balanced strain levels were noticed for reinforced PEEK implants of which CFR-PEEK one-piece implants showed proper biomechanical behavior. Balanced strain levels might induce bone remodeling at the peri-implant region while maintaining low risks of mechanical failures. However, the strength of the PEEK-based composite materials is still low for long-term clinical performance.
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Affiliation(s)
- Douglas Fabris
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Florianópolis, 88040-900, Brazil
| | - José P A Moura
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Florianópolis, 88040-900, Brazil.,Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Braga, 4800-058, Portugal
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Florianópolis, 88040-900, Brazil
| | - Júlio C M Souza
- Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Braga, 4800-058, Portugal.,School of Dental Sciences, University Institute of Health Sciences (IUCS), CESPU, Gandra PRD, 4585-116, Portugal
| | - Filipe S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Braga, 4800-058, Portugal
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Florianópolis, 88040-900, Brazil.,Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Braga, 4800-058, Portugal
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21
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Fabris D, Fredel MC, Souza JCM, Silva FS, Henriques B. Biomechanical behavior of functionally graded S53P4 bioglass-zirconia dental implants: Experimental and finite element analyses. J Mech Behav Biomed Mater 2021; 120:104565. [PMID: 34087536 DOI: 10.1016/j.jmbbm.2021.104565] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The aim of this work was to evaluate the biomechanical behavior of one-piece zirconia implants with a functionally graded bioglass (BG) layer as compared to monolithic zirconia and BG-coated implants, using the finite element method (FEM). METHODS Zirconia disks were infiltrated with bioglass S53P4 and then morphologically inspected by scanning electron microscopy (SEM) followed by mechanical analyses on micro-indentation tests for further biomechanical validation using the finite element method (FEM). On modeling, zirconia dental implants anchored into mandibular bone were simulated on occlusal loading as recorded under mastication. Three types of implants were simulated: i) free of BG coating, ii) with 100 μm or 150 μm thick conventional BG coatings; and iii) with graded BG coatings involving 3 different chemical composition distributions. The stress state at both implant and bone were evaluated using the FEM. The mechanically-induced bone remodelling was analyzed through the bone strain results. RESULTS Infiltration of BG into a zirconia structure resulted in a ∼100 μm thick layer with an exponential-like gradation of chemical composition and properties. Regarding the FEM calculations, the BG coating induced up to 30% decrease on stress in the implant body when compared to the monolithic zirconia implant. The gradient of chemical composition also improved the stresses' distribution. The stresses distribution towards the BG-coatings were significantly high and could lead to failure. Stresses on the bone were recorded down to its strength threshold, with insignificant influence of the coating layer. The bone strain values on all models indicates further bone remodelling although BG-coated and BG-graded zirconia implants showed the highest strain magnitude that may enhance the mechanical stimulation for bone maintenance. SIGNIFICANCE Graded BG-zirconia dental implants showed enhanced overall biomechanical behaviour as compared to the BG-coated or monolithic zirconia dental implants. Also, such biomechanical improvements noticed for the BG-graded system should be considered in combination with the well-known osseointegration benefits of bioactive glasses.
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Affiliation(s)
- Douglas Fabris
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, 88040-900, Florianópolis, SC, Brazil
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, 88040-900, Florianópolis, SC, Brazil
| | - Júlio C M Souza
- Department of Dental Sciences, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal; CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Filipe S Silva
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, 88040-900, Florianópolis, SC, Brazil; Department of Dental Sciences, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil.
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22
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Gonçalves IMR, Herrero ER, Carvalho O, Henriques B, Silva FS, Teughels W, Souza JCM. Antibiofilm effects of titanium surfaces modified by laser texturing and hot-pressing sintering with silver. J Biomed Mater Res B Appl Biomater 2021; 109:1588-1600. [PMID: 33622023 DOI: 10.1002/jbm.b.34817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 01/23/2021] [Accepted: 02/01/2021] [Indexed: 11/07/2022]
Abstract
Peri-implant diseases are one of the main causes of dental implant failure. New strategies for dental implants manufacturing have been developed to prevent the accumulation of bacteria and related inflammatory reactions. The main aim of this work was to develop laser-treated titanium surfaces covered with silver that generate a electrical dipole to inhibit the oral bacteria accumulation. Two approaches were developed for that purpose. In one approach a pattern of different titanium dioxide thickness was produced on the titanium surface, using a Q-Switched Nd:YAG laser system operating at 1064 nm. The second approach was to incorporate silver particles on a laser textured titanium surface. The incorporation of the silver was performed by laser sintering and hot-pressing approaches. The anti-biofilm effect of the discs were tested against biofilms involving 14 different bacterial strains growth for 24 and 72 hr. The morphological aspects of the surfaces were evaluated by optical and field emission guns scanning electronical microscopy (FEGSEM) and therefore the wettability and roughness were also assessed. Physicochemical analyses revealed that the test surfaces were hydrophilic and moderately rough. The oxidized titanium surfaces showed no signs of antibacterial effects when compared to polished discs. However, the discs with silver revealed a decrease of accumulation of Porphyromonas gingivalis and Prevotella intermedia strains. Thus, the combination of Nd:YAG laser irradiation and hot-pressing was effective to produce silver-based patterns on titanium surfaces to inhibit the growth of pathogenic bacterial species. The laser parameters can be optimized to achieve different patterns, roughness, and thickness of the modified titanium layer regarding the type and region of the implant.
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Affiliation(s)
- Inês M R Gonçalves
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Braga, 4800-058, Portugal
| | - Esteban R Herrero
- Department of Oral Health Sciences, Periodontology, KU Leuven & Dentistry, University Hospitals Leuven, Katholieke Universiteit Leuven, Leuven, 3000, Belgium
| | - Oscar Carvalho
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Braga, 4800-058, Portugal
| | - Bruno Henriques
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Braga, 4800-058, Portugal
| | - Filipe S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Braga, 4800-058, Portugal
| | - Wim Teughels
- Department of Oral Health Sciences, Periodontology, KU Leuven & Dentistry, University Hospitals Leuven, Katholieke Universiteit Leuven, Leuven, 3000, Belgium
| | - Júlio C M Souza
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Braga, 4800-058, Portugal.,Department of Dental Sciences, University Institute of Health Sciences (IUCS), CESPU, Gandra PRD, 4585-116, Portugal
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23
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Souza JCM, Pinho SS, Braz MP, Silva FS, Henriques B. Carbon fiber-reinforced PEEK in implant dentistry: A scoping review on the finite element method. Comput Methods Biomech Biomed Engin 2021; 24:1355-1367. [PMID: 33616450 DOI: 10.1080/10255842.2021.1888939] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Objective: The aim of the present study was to perform an integrative systematic review on the stress distribution assessed by finite element analysis on dental implants or abutments composed of carbon fiber-reinforced PEEK composites.Method: An electronic search was performed on PUBMED and ScienceDirect using a combination of the following search terms: PEEK, Polyetheretherketone, FEA, FEM, Finite element, Stress, Dental implant and Dental abutment.Results: The findings reported mechanical properties and the stress distribution through implant and abutment composed of PEEK and its fiber-reinforced composites. Unfilled PEEK revealed low values of elastic modulus and strength that negatively affected the stress distribution through the abutment and implant towards to the bone tisues. The incorporation of 30% carbon fibers increased the elastic modulus and strength of the PEEK-matrix composites although some studies reported no statistic differences in stress magnitude when compared to unfilled PEEK. However, an increase in short carbon fibers up to 60% revealed an enhancement on the stress distribution through abutment and implants towards to the bone tissues. PEEK veneering onto titanium core structures can also be a strategy to control the stress distribution at the implant-to-bone interface.Conclusions: The stiffness and strength of PEEK-matrix composites can be increased by the improvement of the carbon fibers' network. Thus, the content, shape, dimensions, and chemical composition of fibers are key factors to improve the stress distribution through abutment and implants composed of PEEK-matrix composites.
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Affiliation(s)
- Júlio C M Souza
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, 4800-058 Guimarães, Braga, Portugal.,Dept. of Dental Sciences, School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
| | - Sofia S Pinho
- Dept. of Dental Sciences, School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
| | - Maria Pranto Braz
- Dept. of Dental Sciences, School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra PRD, Portugal
| | - Filipe S Silva
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, 4800-058 Guimarães, Braga, Portugal
| | - Bruno Henriques
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, 4800-058 Guimarães, Braga, Portugal.,Ceramic and Composite Materials Research Group (CERMAT), Departmenf of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis/SC, Brazil
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24
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Souza JC, Correia MS, Oliveira MN, Silva FS, Henriques B, Novaes de Oliveira AP, Gomes JR. PEEK-matrix composites containing different content of natural silica fibers or particulate lithium‑zirconium silicate glass fillers: Coefficient of friction and wear volume measurements. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biotri.2020.100147] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Gouveia PF, Mesquita-Guimarães J, Galárraga-Vinueza ME, Souza JCM, Silva FS, Fredel MC, Boccaccini AR, Detsch R, Henriques B. In-vitro mechanical and biological evaluation of novel zirconia reinforced bioglass scaffolds for bone repair. J Mech Behav Biomed Mater 2020; 114:104164. [PMID: 33243695 DOI: 10.1016/j.jmbbm.2020.104164] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/21/2020] [Accepted: 10/23/2020] [Indexed: 01/22/2023]
Abstract
Bone defects resulting from infections, tumors, or traumas represent a major health care issue. Tissue engineering has been working togehter with medicine to develop techniques to repair bone damage and increase patient's life quality. In that context, scaffolds composed of bioactive ceramics have been explored, although their poor mechanical properties restrain their clinical applications as highly porous structures. As an alternative solution, this study aimed to evaluate the mechanical properties and biological response of novel zirconia reinforced bioactive glass scaffolds (ZRBG) manufactured by the replica method. The microstructure, chemical composition, compressive strength, density, in-vitro bioactivity, and cell viability were analyzed and compared to scaffolds made of monolithic zirconia of similar architecture (45, 60 and 85 ppi). The microstructure of ZRGB scaffolds consisted of a bioactive glass matrix with dispersed zirconia particles (~33% glassy phase) and the compressive strength values (ZRBG scaffolds: 0.33 ± 0.11, 0.41 ± 0.20 and 0.48 ± 0.6 MPa; ZRBG scaffolds with extra BG coating: 0.38 ± 0.13, 0.45 ± 0.11 and 0.50 ± 0.14 MPa for 45, 60 and 80 ppi, respectively) were not statistically different from those of zirconia scaffolds (0.25 ± 0.14 MPa for 45 ppi, 0.32 ± 0.11 MPa for 60 ppi and 0.44 ± 0.07 MPa for 80 ppi). No bioactivity was exhibited by monolithic zirconia scaffolds while significant bioactive response was found for ZRBG scaffolds. The cell viability of ZRBG scaffolds in osteogenic medium was improved up to 171% over zirconia scaffolds. This work provides promosing results for further exploring this technique for implant dentistry.
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Affiliation(s)
- Paula F Gouveia
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil
| | - Joana Mesquita-Guimarães
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal
| | - María E Galárraga-Vinueza
- School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil; School of Dentistry, Universidad de las Américas (UDLA), Quito, Ecuador
| | - Júlio C M Souza
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal; School of Dentistry, University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal
| | - Filipe S Silva
- Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Rainer Detsch
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus de Azurém, 4800-058, Guimarães, Braga, Portugal; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil.
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26
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Bartolomeu F, Costa MM, Alves N, Miranda G, Silva FS. Selective Laser Melting of Ti6Al4V sub-millimetric cellular structures: Prediction of dimensional deviations and mechanical performance. J Mech Behav Biomed Mater 2020; 113:104123. [PMID: 33032011 DOI: 10.1016/j.jmbbm.2020.104123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/16/2020] [Accepted: 09/28/2020] [Indexed: 12/21/2022]
Abstract
Ti6Al4V sub-millimetric cellular structures arise as promising solutions concerning the progress of conventional orthopedic implants due to its ability to address a combination of mechanical, physical and topological properties. Such ability can improve the interaction between implant materials and surrounding bone leading to long-term successful orthopedic implants. Selective Laser Melting (SLM) capability to produce high quality Ti6Al4V porous implants is in great demand towards orthopedic biomaterials. In this study, Ti6Al4V cellular structures were designed, modeled, SLM produced and characterized targeting orthopedic implants. For that purpose, a set of tools is proposed to overcome SLM limited accuracy to produce porous biomaterials with desired dimensions and mechanical properties. Morphological analyses were performed to evaluate the dimensional deviations noticed between the model CAD and the SLM produced structures. Tensile tests were carried out to estimate the elastic modulus of the Ti6Al4V cellular structures. The present work proposes a design methodology showing the linear correlations found for the dimensions, the porosity and the elastic modulus when comparing the model CAD designs with Ti6Al4V structures by SLM.
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Affiliation(s)
- F Bartolomeu
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
| | - M M Costa
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - N Alves
- Centre for Rapid and Sustainable Product Development Polytechnic Institute of Leiria, Rua General Norton de Matos, Apartado 4133, 2411-901, Leiria, Portugal
| | - G Miranda
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; CICECO, Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193, Aveiro, Portugal
| | - F S Silva
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
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27
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Dantas TA, Carneiro Neto JP, Alves JL, Vaz PCS, Silva FS. In silico evaluation of the stress fields on the cortical bone surrounding dental implants: Comparing root-analogue and screwed implants. J Mech Behav Biomed Mater 2020; 104:103667. [PMID: 32174425 DOI: 10.1016/j.jmbbm.2020.103667] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/29/2020] [Accepted: 02/01/2020] [Indexed: 02/06/2023]
Abstract
Tooth loss is a problem that affects both old and young people. It may be caused by several conditions, such as poor oral hygiene, lifestyle choices or even diseases like periodontal disease, tooth grinding or diabetes. Nowadays, replacing a missing tooth by an implant is a very common process. However, many limitations regarding the actual strategies can be enumerated. Conventional screwed implants tend to induce high levels of stress in the peri-implant bone area, leading to bone loss, bacterial bio-film formation, and subsequent implant failure. In this sense, root-analogue dental implants are becoming promising solutions for immediate implantation due to their minimally invasive nature, improved bone stress distribution and because they do not require bone drilling, sinus lift, bone augmentation nor other traumatic procedures. The aim of this study was to analyse and compare, by means of FEA, the stress fields of peri-implant bone around root-analogue and screwed conventional zirconia implants. For that purpose, one root-analogue implant, one root-analogue implant with flaps, two conventional implants (with different threads) and a replica of a natural tooth were modelled. COMSOL was used to perform the analysis and implants were subjected to two simultaneous loads: 100 N axially and 100 N oblique (45°). RESULTS: revealed that root-analogue implants, namely with flaps, should be considered as promising alternatives for dental implant solutions since they promote a better stress distribution in the cortical bone when compared with conventional implants.
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Affiliation(s)
- T A Dantas
- CMEMS - Center for MicroElectroMechanical Systems, University of Minho, Portugal; MIT Portugal Program - School of Engineering, University of Minho, Portugal.
| | - J P Carneiro Neto
- CMEMS - Center for MicroElectroMechanical Systems, University of Minho, Portugal
| | - J L Alves
- CMEMS - Center for MicroElectroMechanical Systems, University of Minho, Portugal
| | - Paula C S Vaz
- Fixed Prosthodontics, Genetics- Faculty of Dental Medicine, University of Porto, Portugal
| | - F S Silva
- CMEMS - Center for MicroElectroMechanical Systems, University of Minho, Portugal
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Leal A, Andrade R, Flores P, Silva FS, Fulkerson J, Neyret P, Arendt E, Espregueira-Mendes J. Unilateral anterior knee pain is associated with increased patellar lateral position after stressed lateral translation. Knee Surg Sports Traumatol Arthrosc 2020; 28:454-462. [PMID: 31375878 DOI: 10.1007/s00167-019-05652-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 07/26/2019] [Indexed: 12/28/2022]
Abstract
PURPOSE To objectively compare side-to-side patellar position and mobility in patients with idiopathic unilateral anterior knee pain (AKP) using a stress-testing device concomitantly with magnetic resonance imaging. It is hypothesized that the painful knees present greater patellar mobility than the contralateral non-painful knees. METHODS From a total sample of 359 patients, 23 patients with idiopathic unilateral AKP (30.9 years, 23.4 kg/m2, 43% males) were included within the present study. Both knees of all the patients were examined by conventional imaging, including the measurement of trochlear sulcus angle, Caton-Deschamps index, tibial tuberosity to trochlear groove distance, patellar tilt angle and patellar subluxation (both at rest and upon quadriceps contraction). Additionally, the same patients underwent stress testing (Porto Patella Testing Device); these measurements were taken with the patella at rest, after lateral patellar translation and after lateral patellar tilt. Clinical and functional outcomes were obtained using physical examination and the Kujala and Lysholm scores. RESULTS Painful knees showed statistically significant higher patellar lateral position after stressed lateral translation than non-painful knees (p = 0.028), 9.8 ± 3.6 mm and 7.1 ± 6.3 mm, respectively. The adjusted multivariate logistic model identified the patellar position after lateral displacement to be significantly associated with AKP (OR = 1.165) and the model (AUC = 0.807, p < 0.001) showed reasonable sensitivity (67%) and specificity (73%). CONCLUSION Patients with idiopathic unilateral AKP with morphologically equivalent knees showed statistically significant increased patellar lateral position after stressed lateral displacement in their painful knee. The greater lateral patellar mobility quantified by the PPTD testing brings more objectivity to the diagnosis. LEVEL OF EVIDENCE II.
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Affiliation(s)
- Ana Leal
- Mechanical Engineering Department, CMEMS Center for MicroElectroMechanical Systems, University of Minho, Guimarães, Portugal.,Dom Henrique Research Centre, Porto, Portugal
| | - Renato Andrade
- Dom Henrique Research Centre, Porto, Portugal.,Clínica Do Dragão, Espregueira-Mendes Sports Centre, FIFA Medical Centre of Excellence, Porto, Portugal.,Faculty of Sports of Porto University, Porto, Portugal
| | - Paulo Flores
- Mechanical Engineering Department, CMEMS Center for MicroElectroMechanical Systems, University of Minho, Guimarães, Portugal
| | - Filipe S Silva
- Mechanical Engineering Department, CMEMS Center for MicroElectroMechanical Systems, University of Minho, Guimarães, Portugal
| | - John Fulkerson
- University of Connecticut School of Medicine, Farmington, CT, USA
| | - Philippe Neyret
- Department of Orthopaedic Surgery, Centre Albert-Trillat, Hôpital de La Croix-Rousse, Lyon, France
| | - Elizabeth Arendt
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN, USA
| | - João Espregueira-Mendes
- Dom Henrique Research Centre, Porto, Portugal. .,Clínica Do Dragão, Espregueira-Mendes Sports Centre, FIFA Medical Centre of Excellence, Porto, Portugal. .,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal. .,School of Medicine, Minho University, Braga, Portugal.
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29
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Faria D, Madeira S, Buciumeanu M, Silva FS, Carvalho O. Novel laser textured surface designs for improved zirconia implants performance. Mater Sci Eng C Mater Biol Appl 2019; 108:110390. [PMID: 31923937 DOI: 10.1016/j.msec.2019.110390] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 10/27/2019] [Accepted: 10/31/2019] [Indexed: 12/15/2022]
Abstract
The development of new surface designs to enhance the integration process between surgically placed implants and biological tissues remains a challenge for the scientific community. In this way and trying to overcome this issue, in this work, laser technology was explored to produce novel textures on the surface of green zirconia compacts produced by cold pressing technique. Two strategies regarding line design (8 and 16 lines design) and different laser parameters (laser power and number of laser passages) were explored to assess their influence on geometry and depth of created textures. The produced textures were evaluated with Scanning Electron Microscopy (SEM) and it was observed that well-defined textured surfaces with regular geometric features (cavities or pillars) were obtained by laser combining different strategies lines design and parameters. The potential of proposed textures was also evaluated regarding surface wettability, friction performance (static and dynamic coefficient of friction evolution) against bone, aging resistance and flexural strength. Results demonstrated that all the produced textures display a super hydrophilic or hydrophilic behavior. Regarding the friction behavior, it was experimentally observed a high initial static coefficient of friction (COF) for all produced textures. Concerning the aging resistance, all the textured surfaces revealed a low monoclinic content, less than 25% after 5 h of hydrothermal aging. The flexural strength results showed that the mechanical resistance of zirconia was not significantly compromised with the laser action. Based on the obtained results, it is possible to prove that the processing route used for manufacturing the new and different surface designs (cold pressing technique followed by laser texturing) showed to be particularly effective for the production of zirconia implants with customized surface designs according to the properties required in a specific application. These new surface designs besides to enhance the surface wettability and also to improve the fixation at the initial moment of the implantation, do not significantly compromise the resistance to aging and the mechanical performance of zirconia. Hence, a positive impact on the long-term performance of the zirconia implants may be expected with the proposed novel laser textured surface designs.
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Affiliation(s)
- D Faria
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - S Madeira
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
| | - M Buciumeanu
- Department of Mechanical Engineering, Faculty of Engineering, "Dunărea de Jos" University of Galaţi, Domnească 47, 800008, Galati, Romania
| | - F S Silva
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - O Carvalho
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
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Madeira S, Mesquita-Guimarães J, Ribeiro P, Fredel M, Souza JCM, Soares D, Silva FS, Henriques B. Y-TZP/porcelain graded dental restorations design for improved damping behavior - A study on damping capacity and dynamic Young's modulus. J Mech Behav Biomed Mater 2019; 96:219-226. [PMID: 31055212 DOI: 10.1016/j.jmbbm.2019.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 01/12/2023]
Abstract
The development of dental restorative materials that mimic tooth-like properties provided by graded structures, aesthetics and properties such as strength, damping capacity and the ability for a continuous remodeling according to the biomechanical solicitation is a great challenge. In this work, damping capacity and dynamic Young's modulus of Y-TZP/porcelain composites for all-ceramic dental restorations were studied. These mechanical properties were assessed by dynamic mechanical analyses (DMA) at frequencies of 1, 5 and 10 Hz, over a temperature ranging from 0 to 60 °C, simulating extreme conditions when a cold or hot drink is experienced. The results showed that porcelain and porcelain-matrix composites exhibited higher damping capacity while Y-TZP and Y-TZP-matrix composites presented higher dynamic Young's modulus. Furthermore, while damping capacity is strongly influenced by the temperature, no significant difference in dynamic Young's modulus was found. For both damping and modulus properties, no significant influence of frequency was found for the tested materials. Based on the obtained results and also on the known advantages of the graded Y-TZP/porcelain structures over traditional bi-layer solutions (e.g., improved bending strength, enhanced mechanical and thermal stress distribution), a novel design of all-ceramic restoration with damping capacity has been proposed at the end of this study. A positive impact on the long-term performance of these all-ceramic restorations may be expected.
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Affiliation(s)
- S Madeira
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
| | - J Mesquita-Guimarães
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
| | - P Ribeiro
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - M Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil
| | - J C M Souza
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; Department of Dental Sciences, University Institute of Health Sciences (IUCS), CESPU, Gandra, Portugal
| | - D Soares
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - F S Silva
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Bruno Henriques
- Center for Micro-Electro Mechanical Systems (CMEMS), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal; Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; School of Dentistry (DODT), Post-Graduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil.
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Roedel S, Mesquita-Guimarães J, Souza JCM, Silva FS, Fredel MC, Henriques B. Production and characterization of zirconia structures with a porous surface. Mater Sci Eng C Mater Biol Appl 2019; 101:264-273. [PMID: 31029319 DOI: 10.1016/j.msec.2019.03.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 02/07/2019] [Accepted: 03/24/2019] [Indexed: 12/21/2022]
Abstract
The aim of this study was to produce zirconia structures with a porous surface by the dip coating technique and assess the mechanical properties of the structures as well as the integrity of the porous layers. Surface porous layers with homogenous and graded porosity were produced over zirconia substrate discs using zirconia powders with different average sizes (d50 = 40 μm; d50 = 70 μm and d50 = 100 μm) and without pore forming fugitive phases. Specimens were inspected using Scanning Electron Microscopy. Bending strength of specimens was obtained from biaxial flexural tests (B3B). Porous layers were successfully produced on zirconia discs substrates and the bending strength of these specimens were ~35% lower than uncoated specimens. Delamination occurred especially in layers with higher thickness and made of bigger particles. Practical application examples were provided in this paper showing the versatility of these porous surfaces in the production of multifunctional surfaces for stronger interfaces.
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Affiliation(s)
- Stephanie Roedel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina, Campus Trindade, 88040-900 Florianópolis, SC, Brazil.
| | | | - Júlio C M Souza
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal; School of Dentistry, Polythenic Institute of Healh Sciences of North (IUCS-CESPU), Gandra, Portugal
| | - Filipe S Silva
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina, Campus Trindade, 88040-900 Florianópolis, SC, Brazil; School of Dentistry, Polythenic Institute of Healh Sciences of North (IUCS-CESPU), Gandra, Portugal
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina, Campus Trindade, 88040-900 Florianópolis, SC, Brazil; CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal; School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900 Florianópolis, SC, Brazil.
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Costa MM, Bartolomeu F, Alves N, Silva FS, Miranda G. Tribological behavior of bioactive multi-material structures targeting orthopedic applications. J Mech Behav Biomed Mater 2019; 94:193-200. [PMID: 30903863 DOI: 10.1016/j.jmbbm.2019.02.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 01/18/2019] [Accepted: 02/28/2019] [Indexed: 11/29/2022]
Abstract
The following study proposes a multi-material solution in which Ti6Al4V cellular structures produced by Selective Laser Melting are impregnated with bioactive materials (hydroxyapatite or β-tricalcium phosphate) using press and sintering technique. To assess the tribological response of these structures, an alumina plate was used as a counterpart in a flat-on-flat reciprocating sliding test. Ti6Al4V cellular structures impregnated with bioactive materials displayed the highest wear resistance when compared with the unreinforced structures. Among the bioactive structures, Ti6Al4V cellular structures impregnated with βTCP were the ones with higher wear resistance, having the lowest weight loss. Hence, these structures are promising multifunctional solutions for load-bearing applications by gathering suitable mechanical properties (strength and stiffness); bioactive properties and in addition an improved wear performance.
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Affiliation(s)
- M M Costa
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
| | - F Bartolomeu
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - N Alves
- Centre for Rapid and Sustainable Product Development Polytechnic Institute of Leiria, Rua General Norton de Matos, Apartado 4133, 2411-901 Leiria, Portugal
| | - F S Silva
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - G Miranda
- Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
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Peñarrieta-Juanito G, Sordi MB, Henriques B, Dotto MER, Teughels W, Silva FS, Magini RS, Souza JCM. Surface damage of dental implant systems and ions release after exposure to fluoride and hydrogen peroxide. J Periodontal Res 2018; 54:46-52. [PMID: 30368813 DOI: 10.1111/jre.12603] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 07/20/2018] [Accepted: 08/02/2018] [Indexed: 01/16/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate surface changes on dental implant systems and ions release after immersion in fluoride and hydrogen peroxide. METHODS Ten implant-abutment assemblies were embedded in acrylic resin and cross-sectioned along the implant vertical axis. Samples were wet ground and polished. Delimited areas of groups of samples were immersed in 1.23% sodium fluoride gel (F) or in 35% hydrogen peroxide (HP) for 16 min. Gels (n = 3) were collected from the implant surfaces and analyzed by inductively coupled plasma mass spectrometry (ICP-MS), to detect the concentration of metallic ions released from the implant systems. Selected areas of the abutment and implant (n = 15) were analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). RESULTS SEM images revealed surface topographic changes on implant-abutment joints after immersion in fluoride. Implants showed excessive oxidation within loss of material, while abutment surfaces revealed intergranular corrosion after immersion in fluoride. ICP-MS results revealed a high concentration of Ti, Al, V ions in fluoride after contact with the implant systems. Localized corrosion of implant systems could not be detected by SEM after immersion in hydrogen peroxide although the profilometry showed increase in roughness. ICP-MS showed the release of metallic ions in hydrogen peroxide medium after contact with dental implants. CONCLUSION Therapeutical substances such as fluorides and hydrogen peroxide can promote the degradation of titanium-based dental implant and abutments leading to the release of toxic ions.
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Affiliation(s)
- Gabriella Peñarrieta-Juanito
- Postgraduate Program in Dentistry (PPGO), Department of Dentistry, Division of Implant Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Mariane B Sordi
- Postgraduate Program in Dentistry (PPGO), Department of Dentistry, Division of Implant Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Bruno Henriques
- Laboratory of Ceramic and Composite Materials (CERMAT), Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis, Brazil.,Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
| | - Marta E R Dotto
- Department of Physics, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Wim Teughels
- Department of Oral Health Sciences, University Hospitals Leuven, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Filipe S Silva
- Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
| | - Ricardo S Magini
- Postgraduate Program in Dentistry (PPGO), Department of Dentistry, Division of Implant Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
| | - Júlio C M Souza
- Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, Portugal
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Dantas TA, Roedel S, Mesquita-Guimarães J, Pinto P, Souza JCM, Fredel MC, Silva FS, Henriques B. Sliding behavior of zirconia porous implant surfaces against bone. J Biomed Mater Res B Appl Biomater 2018; 107:1113-1121. [PMID: 30230711 DOI: 10.1002/jbm.b.34204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/25/2018] [Accepted: 07/01/2018] [Indexed: 01/27/2023]
Abstract
Different zirconia porous layers were produced on zirconia dense zirconia substrates by slip casting using powder with different mean sizes: 40 μm (Z40), 70 μm (Z70), and 100 μm (Z100). The dynamic and static coefficients of friction against bovine femoral bone, mimicking the implantation process, were conducted using a ball-on-flat reciprocating sliding tribometer under 3 N of normal load. Additionally, the porous layers were assessed with regard to their low temperature degradation (aging). Results revealed that the porous layers were able to keep their integrity during the sliding testes against bone, with no zirconia particles being transferred to the bone. Results did not show significant differences (p > 0.05) in kinetic and static COF values for Z40, Z70, Z100, and GRAD specimens, ranging from 0.53 to 0.77 and 0.65 to 0.90, respectively. The aging tests revealed that all surfaces were prone to low temperature degradation (~49% of monoclinic content after 18 h). In conclusion, the cohesive integrity of the layers and relatively high COF observed reveled that zirconia porous layers may be considered for replacing the current implant surfaces, and are expected to improve their primary stability. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1113-1121, 2019.
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Affiliation(s)
- T A Dantas
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal.,MIT Portugal Program, School of Engineering, University of Minho, Guimarães, Portugal
| | - S Roedel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, Brazil
| | - J Mesquita-Guimarães
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal
| | - P Pinto
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal
| | - J C M Souza
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal.,School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, /SC, Brazil
| | - M C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, Brazil
| | - F S Silva
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal
| | - B Henriques
- Center for MicroElectroMechanical Systems (CMEMS), University of Minho (UMinho), 4800-058, Guimarães, Portugal.,Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), 88040-900, Florianópolis, Brazil.,School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, /SC, Brazil
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Macedo MGFP, Volpato CAM, Henriques BAPC, Vaz PCS, Silva FS, Silva CFCL. Color stability of a bis-acryl composite resin subjected to polishing, thermocycling, intercalated baths, and immersion in different beverages. J ESTHET RESTOR DENT 2018; 30:449-456. [PMID: 30194894 DOI: 10.1111/jerd.12404] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 04/22/2018] [Accepted: 05/26/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the color of a bis-acryl resin after polishing, aging, and colorants. MATERIALS AND METHODS From the 140 disks obtained, 35 were not polished (NP), 35 were polished with 3-μm (3P), 35 with 3- and 1-μm (1P), and 35 with 3-, 1-, and 0.5-μm sized particles (05P). Five disks of each group were thermocycled for 20, 100, and 200 cycles. Sixty disks were thermocycled and kept in beverages (tea, wine, and coffee) after four cycles. Sixty disks were immersed in the beverages for 24 hours, a week, and a month. The coordinates L*a*b* were measured and the color differences were analyzed by ANOVA. The lightness, chroma, and hue differences were evaluated by repeated measures ANOVA. Comparisons were made with Tukey's test (α = 0.05). RESULTS Similar behaviors were observed between 3P and 05P groups (1.53 and 1.95ΔE00 ) (P < .05). The NP group submitted to 200 cycles showed the biggest color differences (3.02) (P = .003). The greatest color differences were observed in the NP group submitted to immersion in coffee (8.30) and wine (7.93) (P < .05). CONCLUSIONS The polished surfaces were the least stained. Coffee and wine provided the greatest color changes, both for baths and immersions. CLINICAL SIGNIFICANCE Polishing of provisional surfaces restorations made of bis-acrylic resin is essential to minimize staining caused by aging and use of colorants, regardless of the particle size present in the polishing paste. The contact with coffee and red wine should be avoided, especially for clinical times greater than 1 week.
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Affiliation(s)
| | - Claudia A M Volpato
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | | | - Paula C S Vaz
- Department of Dental Medicine, University of Porto, Porto, Portugal
| | - Filipe S Silva
- Department of Mechanical Engineering, University of Minho, Guimarães, Portugal
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Pessanha-Andrade M, Sordi MB, Henriques B, Silva FS, Teughels W, Souza JCM. Custom-made root-analogue zirconia implants: A scoping review on mechanical and biological benefits. J Biomed Mater Res B Appl Biomater 2018; 106:2888-2900. [PMID: 30070423 DOI: 10.1002/jbm.b.34147] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/18/2018] [Accepted: 04/09/2018] [Indexed: 12/26/2022]
Abstract
The aim of this study was to conduct a literature review on the potential benefits of custom-made root-analogue zirconia implants. A PubMed and ScienceDirect bibliographical search was carried out from 1969 to 2017. The increased interest in zirconia-based dental structures linked to aesthetic and biological outcomes have been reported in literature. Recent technological advances have focused on novel strategies for modification of zirconia-based surfaces to accelerate osseointegration. However, only a few studies revealed mechanical and biological benefits of custom-made root-analogue zirconia implants and therefore further studies should investigate the influence of different design and surface modification on the performance of such implants. Custom-made root-analogue zirconia implants have become a viable alternative to overcome limitations concerning stress distribution, aesthetics, and peri-implantitis induced by biofilms. However, further in vitro and in vivo studies on surface-bone interactions and mechanical behavior of zirconia should be evaluated to reduce clinical issues regarding mechanical failures and late peri-implant bone loss. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2888-2900, 2018.
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Affiliation(s)
- Miguel Pessanha-Andrade
- Division of Oral Implantology, School of Dentistry, Universidade Fernando Pessoa (UFP), Porto, Portugal
| | - Mariane B Sordi
- Post-graduate Program in Dentistry (PPGO), Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil
| | - Bruno Henriques
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus Azurém, Guimarães, Portugal
| | - Filipe S Silva
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus Azurém, Guimarães, Portugal
| | - Wim Teughels
- Department of Oral Health Sciences, University Hospitals Leuven, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Júlio C M Souza
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Campus Azurém, Guimarães, Portugal
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Pio IDSL, Lavor AL, Damasceno CMD, Menezes PMN, Silva FS, Maia GLA. Traditional knowledge and uses of medicinal plants by the inhabitants of the islands of the São Francisco river, Brazil and preliminary analysis of Rhaphiodon echinus (Lamiaceae). BRAZ J BIOL 2018; 79:87-99. [PMID: 29694558 DOI: 10.1590/1519-6984.177447] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 08/10/2017] [Indexed: 11/22/2022] Open
Abstract
This study aimed to carry out an ethnobotanical survey of medicinal plants used by inhabitants of the Rodeadouro Island, Jatoba Island and Massangano Island, located in The Submedium São Francisco River Valley. Also phytochemicals and preliminary pharmacological tests were performed to species most cited by the community. Ethnobotanical data were collected through observation visits and semi-structured interviews with 12 key informants. We calculated the relative importance (RI), the percentage of agreement related to the main uses (cAMU) and use value (UV). The aerial parts of Rhaphiodon echinus (Ness & Mart.) Schauer were used to obtain the lyophilizate (LYO-Re), crude ethanol extract (CEE-Re) and their hexanic (HEX-Re), chloroform (CLO-Re) and ethyl acetate (EA-Re) fractions. The microdilution technique was used for determining Minimum inhibitory concentration (MIC) for selected microorganisms. Already the spasmolytic effect was evaluated in isolated uterus fragments of Wistar rats, pre contracted with KCl 60 mM. We found 34 species cited, belonging to 22 families. The most plants were grown by locals. There were 51 different diseases, but the main indication was infectious and parasitic diseases. The species R. echinus was the most reported and it was indicated for urinary tract infection and dysmenorrhea. The screening revealed a higher prevalence of flavonoids, tannins, lignans and saponins in LYO-Re and AE-Re. Already terpene compounds were more present in HEX-Re and CLO-Re. The RE-Re fraction stood out with strong effect against E. coli and S. aureus while CEE-Re has moderate effect against gram-negative bacteria. The evaluation of the spasmolytic activity showed that LYO-Re, CEE-Re and HEX-Re fractions have similar activity, with partial effect and concentration-dependent response. This work brought about knowledge and use of medicinal plants by the riparian of the São Francisco River. It also revealed the importance of other methodologies for scientific evidence for the popular use of R. echinus.
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Affiliation(s)
- I D S L Pio
- Programa de Pós-graduação em Ciências da Saúde e Biológicas, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
| | - A L Lavor
- Colegiado de Ciências Farmacêuticas, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
| | - C M D Damasceno
- Programa de Pós-graduação em Ciências da Saúde e Biológicas, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
| | - P M N Menezes
- Programa de Pós-graduação em Recurso Naturais do Semiárido, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
| | - F S Silva
- Programa de Pós-graduação em Recurso Naturais do Semiárido, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
| | - G L A Maia
- Programa de Pós-graduação em Ciências da Saúde e Biológicas, Universidade Federal do Vale do São Francisco - UNIVASF, Av. José de Sá Maniçoba, s/n, Centro, CEP 56304-917, Petrolina, PE, Brasil
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Henriques B, Fabris D, Souza JCM, Silva FS, Carvalho Ó, Fredel MC, Mesquita-Guimarães J. Bond strength enhancement of zirconia-porcelain interfaces via Nd:YAG laser surface structuring. J Mech Behav Biomed Mater 2018. [PMID: 29524754 DOI: 10.1016/j.jmbbm.2018.02.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of laser surface structuring on the bond strength of feldspar-based porcelain to zirconia, as compared to conventional sandblasting treatment. MATERIALS AND METHODS Thirty cylindrical zirconia substrates, previously sintered, were divided in three groups according to the type of surface conditioning: 1) sandblasting with 50 µm Al2O3; 2) laser structuring (Ø25 µm holes); and 3) laser structuring (Ø50 µm holes). Porcelain was injected onto the zirconia substrates. X-ray diffractometry (XRD) was used to evaluate the influence of the laser treatment on zirconia crystallographic phases. Shear bond strength test was performed. Micrographs using SEM were used to evaluate the zirconia surface after each surface treatment and to evaluate the fracture surface after the shear test. RESULTS The laser-structured groups presented the highest shear bond strength (65 ± 16 MPa and 65 ± 11 MPa, for the 25 µm and 50 µm holes, respectively). The sandblasting samples presented shear bond strength of 37 ± 16 MPa. XRD analysis showed that there was no phase transformation on the thermally affected surface due to laser action. Microcracks were created at some holes due to the high temperature gradient generated by laser. SIGNIFICANCE Laser structuring significantly increased (up to 75%) the shear bond strength of zirconia to veneering porcelain as compared to conventional sandblasting treatment. Therefore, laser structuring arises as a surface conditioning method for producing stronger and long lasting zirconia-porcelain interfaces.
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Affiliation(s)
- Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil; CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil.
| | - Douglas Fabris
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil
| | - Júlio C M Souza
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal; School of Dentistry (DODT), Postgraduate Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis, SC, Brazil
| | - Filipe S Silva
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Óscar Carvalho
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Márcio C Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, Brazil
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Fabris D, Souza JC, Silva FS, Fredel M, Gasik M, Henriques B. Influence of specimens’ geometry and materials on the thermal stresses in dental restorative materials during thermal cycling. J Dent 2018; 69:41-48. [DOI: 10.1016/j.jdent.2017.08.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 08/22/2017] [Accepted: 08/24/2017] [Indexed: 11/16/2022] Open
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Costa-Neta BM, da Silva AA, Brito JM, Moraes JLP, Rebêlo JMM, Silva FS. Light-Emitting Diode (LED) Traps Improve the Light-Trapping of Anopheline Mosquitoes. J Med Entomol 2017; 54:1699-1703. [PMID: 28968803 DOI: 10.1093/jme/tjx148] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Indexed: 06/07/2023]
Abstract
Numerous advantages over the standard incandescent lamp favor the use of light-emitting diodes (LEDs) as an alternative and inexpensive light source for sampling medically important insects in surveillance studies. Previously published studies examined the response of mosquitoes to different wavelengths, but data on anopheline mosquito LED attraction are limited. Center for Disease Control and Prevention-type light traps were modified by replacing the standard incandescent lamp with 5-mm LEDs, one emitting at 520 nm (green) and the other at 470 nm (blue). To test the influence of moon luminosity on LED catches, the experiments were conducted during the four lunar phases during each month of the study period. A total of 1,845 specimens representing eight anopheline species were collected. Anopheles (Nyssorhynchus) evansae (35.2%) was the most frequently collected, followed by An. (Nys.) triannulatus (21.9%), An. (Nys.) goeldii (12.9%), and An. (Nys.) argyritarsis (11.5%). The green LED was the most attractive light source, accounting for 43.3% of the individuals collected, followed by the blue (31.8%) and control (24.9%) lights. The LED traps were significantly more attractive than the control, independent of the lunar phase. Light trapping of anopheline mosquitoes was more efficient when the standard incandescent lamp was replaced with LEDs, regardless of the moon phase. The efficiency of LEDs improves light trapping results, and it is suggested that the use of LEDs as an attractant for anopheline mosquitoes should be taken into consideration when sampling anopheline mosquitoes.
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Affiliation(s)
- B M Costa-Neta
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, CEP: 65500-00, Chapadinha, MA, Brasil
- Laboratório de Entomologia e Vetores, Departamento de Biologia, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
| | - A A da Silva
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, CEP: 65500-00, Chapadinha, MA, Brasil
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
| | - J M Brito
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, CEP: 65500-00, Chapadinha, MA, Brasil
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
- Laboratório de Imunofisiologia, Departamento de Patologia, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
| | - J L P Moraes
- Laboratório de Entomologia e Vetores, Departamento de Biologia, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
| | - J M M Rebêlo
- Laboratório de Entomologia e Vetores, Departamento de Biologia, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
| | - F S Silva
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, CEP: 65500-00, Chapadinha, MA, Brasil
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal do Maranhão, CEP: 65080-805, São Luís, MA, Brasil
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Dantas TA, Costa MM, Miranda G, Silva FS, Abreu CS, Gomes JR. Effect of HAp and β-TCP incorporation on the tribological response of Ti6Al4V biocomposites for implant parts. J Biomed Mater Res B Appl Biomater 2017; 106:1010-1016. [PMID: 28480642 DOI: 10.1002/jbm.b.33908] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/07/2017] [Accepted: 04/14/2017] [Indexed: 01/17/2023]
Abstract
Titanium and its alloys have been widely used in many engineering areas due to their properties. Despite having a high implant-tissue osseointegration time, Ti6Al4V has been extensively used in prosthesis and articular implants. To promote a faster bone ingrowth and consequently reduce the implant fixation time, the addition of a bioactive phase to form a biocomposite seems to be an excellent solution. Because of their bioactivity and similarity in composition with the human bone, HAp and β-TCP are two of the most widely used calcium phosphates in biomedical applications. To guarantee a strong adhesion of the previous bioactive materials in the implants surface, samples of Ti6Al4V, Ti6Al4V+HAp (10 vol %) and Ti6Al4V+β-TCP (10 vol %) TCP were processed by the hot pressing technique. Tribological tests against Al2 O3, lubricated in PBS at 37°C were carried out on a ball-on-flat reciprocating sliding geometry. Loads in the range of 3 N to 30 N were applied and their effect on the friction behavior and wear resistance of the tested materials was evaluated. Values of the coefficient of friction as well as the wear rate tend to increase with the addition of a bioactive phase to the Ti alloy. Micrographs of the worn surfaces showed that abrasion and plastic deformation are the prevailing wear mechanisms in the studied tribosystems. For biocomposites, particularly in the case of Ti6Al4V+HAp, pull-out of bioactive particle clusters has a determinant role on the tribological response, increasing both the friction coefficient and the specific wear rate. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1010-1016, 2018.
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Affiliation(s)
- T A Dantas
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal
| | - M M Costa
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal
| | - G Miranda
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal.,Department of Mechanical Engineering, University of Minho, Guimarães, Portugal
| | - F S Silva
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal.,Department of Mechanical Engineering, University of Minho, Guimarães, Portugal
| | - C S Abreu
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal.,Physics Department, Porto Superior Engineering Institute, ISEP, Portugal
| | - J R Gomes
- Center for Microelectromechanical Systems (CMEMS-UMinho), University of Minho, Guimarães, Portugal.,Department of Mechanical Engineering, University of Minho, Guimarães, Portugal
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Prado AM, Pereira J, Silva FS, Henriques B, Nascimento RM, Benfatti CAM, López-López J, Souza JCM. Wear of Morse taper and external hexagon implant joints after abutment removal. J Mater Sci Mater Med 2017; 28:65. [PMID: 28321800 DOI: 10.1007/s10856-017-5879-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 03/02/2017] [Indexed: 06/06/2023]
Abstract
The aim of this in vitro study was to evaluate the removal torque values on abutments and the morphological wear aspects of two different dental implant joints after immersion in a medium containing biofilm from human saliva. Twenty implant-abutment assemblies were divided into four groups in this study: (A) Morse taper free of medium containing biofilm, and (B) after contact with a medium containing biofilm from human saliva; (C) External Hexagon free of medium containing biofilm, and (D) after contact with medium containing biofilm from human saliva. The abutments were firstly torqued to the implants according to the manufacturer´s recommendations, using a handheld torque meter. Groups B and D were immersed into 24 well-plates containing 2 ml BHI medium with microorganisms for 72 h at 37 °C under microaerophilic conditions. After detorque evaluation, the abutments were removed and the implants were analyzed by scanning electron microscopy (SEM) and profilometry. On the detorque evaluation, the torque values decreased for the external hexagon implants and increased for the Morse taper implants. However, the values were lower when both implant-abutment assemblies were in contact with a medium containing biofilm from human saliva. The wear areas of contacting surfaces of the implants were identified by SEM. The highest average roughness values were recorded on the surfaces free of biofilm. The medium containing biofilm from human saliva affected the maintenance of the torque values on Morse taper and external hexagon abutments. Additionally, the removal of abutment altered the inner implant surfaces resulting in an increase of wear of the titanium-based connection.
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Affiliation(s)
- Abraão M Prado
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, 88040900, Brazil
| | - Jorge Pereira
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Group), School of Dentistry, L'Hospitalet de Llobregat, Universitat de Barcelona, Barcelona, 402 4270, Spain
- School of Health Sciences (FSC), Universidade Fernando Pessoa (UFP), Porto, 4249-004, Portugal
| | - Filipe S Silva
- Center for MicroElectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, 480-058, Portugal
| | - Bruno Henriques
- Center for MicroElectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, 480-058, Portugal
| | - Rubens M Nascimento
- Dept. of Materials Engineering, Post-graduate Program in Materials Science and Engineering (PPgCEM/CCET), Federal University of Rio Grande do Norte (UFRN), Natal, 59072-970, RN, Brazil
| | - Cesar A M Benfatti
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, 88040900, Brazil
| | - José López-López
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Group), School of Dentistry, L'Hospitalet de Llobregat, Universitat de Barcelona, Barcelona, 402 4270, Spain
| | - Júlio C M Souza
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, 88040900, Brazil.
- Center for MicroElectromechanical Systems (CMEMS-UMINHO), University of Minho, Guimarães, 480-058, Portugal.
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Dantas TA, Abreu CS, Costa MM, Miranda G, Silva FS, Dourado N, Gomes JR. Bioactive materials driven primary stability on titanium biocomposites. Mater Sci Eng C Mater Biol Appl 2017; 77:1104-1110. [PMID: 28531984 DOI: 10.1016/j.msec.2017.04.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/20/2017] [Indexed: 01/22/2023]
Abstract
The Ti6Al4V alloy constitutes an alternative choice to the most common metal-polymer solutions for total hip arthroplasty (THA) due to good biocompatibility, optimal mechanical properties and high load bearing capacity. However, as Ti6Al4V is not bioactive in its conventional form, hydroxyapatite (HAp) and tricalcium phosphate (TCP) have been widely used as coatings of metal prostheses due to their osteogenic properties and ability to form strong bonds with bone tissue. A promising approach consists in creating a bioactive surface metal matrix composite Ti6Al4V+β-TCP or Ti6Al4V+HAp, obtained by hot pressing (HP) of powders. In this work, the tribological performance of Ti6Al4V+β-TCP and Ti6Al4V+HAp composites is studied to evaluate the frictional response and surface damage representative of prosthesis implantation, key factors in bone fixation. Biocomposites with 10vol% β-TCP and 10vol% Hap, as well as base titanium alloy, were prepared by HP with two surface finishing conditions - polished (Ra=0.3-0.5μm) and sandblasted (Ra=2.1-2.5μm) - for tribological testing against bovine cortical bone tissue. The static friction increases with surface roughness (from 0.20 to 0.60), whereas the kinetic regime follows an inverse trend for the biocomposites. In contrast with current knowledge, this study shows that an implant design solution based on Ti6Al4V+β-TCP or Ti6Al4V+HAp biocomposites with polished surfaces results in an improved primary stability of implants, when compared to traditional rough surfaces. Moreover, it is also expected that the secondary stability will improve due to the adhesion between bone and HAp/β-TCP, increasing the overall stability of the implant.
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Affiliation(s)
- T A Dantas
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal
| | - C S Abreu
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal; Physics Department, Porto Superior Engineering Institute, ISEP, Portugal.
| | - M M Costa
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal
| | - G Miranda
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal; Department of Mechanical Engineering, University of Minho, Portugal
| | - F S Silva
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal; Department of Mechanical Engineering, University of Minho, Portugal
| | - N Dourado
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal; Department of Mechanical Engineering, University of Minho, Portugal
| | - J R Gomes
- CMEMS-UMinho - Center for Microelectromechanical Systems, University of Minho, Azurém, 4800-058 Guimarães, Portugal; Department of Mechanical Engineering, University of Minho, Portugal
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Fabris D, Souza JC, Silva FS, Fredel M, Mesquita-Guimarães J, Zhang Y, Henriques B. THERMAL RESIDUAL STRESSES IN BILAYERED, TRILAYERED AND GRADED DENTAL CERAMICS. Ceram Int 2017; 43:3670-3678. [PMID: 28163345 PMCID: PMC5289668 DOI: 10.1016/j.ceramint.2016.11.209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Layered ceramic systems are usually hit by residual thermal stresses created during cooling from high processing temperature. The purpose of this study was to determine the thermal residual stresses at different ceramic multi-layered systems and evaluate their influence on the bending stress distribution. Finite elements method was used to evaluate the residual stresses in zirconia-porcelain and alumina-porcelain multi-layered discs and to simulate the 'piston-on-ring' test. Temperature-dependent material properties were used. Three different multi-layered designs were simulated: a conventional bilayered design; a trilayered design, with an intermediate composite layer with constant composition; and a graded design, with an intermediate layer with gradation of properties. Parameters such as the interlayer thickness and composition profiles were varied in the study. Alumina-porcelain discs present smaller residual stress than the zirconia-porcelain discs, regardless of the type of design. The homogeneous interlayer can yield a reduction of ~40% in thermal stress relative to bilayered systems. Thinner interlayers favoured the formation of lower thermal stresses. The graded discs showed the lowest thermal stresses for a gradation profile given by power law function with p=2. The bending stresses were significantly affected by the thermal stresses in the discs. The risk of failure for all-ceramic dental restorative systems can be significantly reduced by using trilayered systems (homogenous or graded interlayer) with the proper design.
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Affiliation(s)
- Douglas Fabris
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Júlio C.M. Souza
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
- School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis/SC, Brazil
| | - Filipe S. Silva
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Márcio Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Joana Mesquita-Guimarães
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Yu Zhang
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York University, New York, USA
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
- School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis/SC, Brazil
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Fabris D, Souza JC, Silva FS, Fredel M, Mesquita-Guimarães J, Zhang Y, Henriques B. The bending stress distribution in bilayered and graded zirconia-based dental ceramics. Ceram Int 2016; 42:11025-11031. [PMID: 28104926 PMCID: PMC5241077 DOI: 10.1016/j.ceramint.2016.03.245] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The purpose of this study was to evaluate the biaxial flexural stresses in classic bilayered and in graded zirconia-feldspathic porcelain composites. A finite element method and an analytical model were used to simulate the piston-on-ring test and to predict the biaxial stress distributions across the thickness of the bilayer and graded zirconia-feldspathic porcelain discs. An axisymmetric model and a flexure formula of Hsueh et al. were used in the FEM and analytical analysis, respectively. Four porcelain thicknesses were tested in the bilayered discs. In graded discs, continuous and stepwise transitions from the bottom zirconia layer to the top porcelain layer were studied. The resulting stresses across the thickness, measured along the central axis of the disc, for the bilayered and graded discs were compared. In bilayered discs, the maximum tensile stress decreased while the stress mismatch (at the interface) increased with the porcelain layer thickness. The optimized balance between both variables is achieved for a porcelain thickness ratio in the range of 0.30-0.35. In graded discs, the highest tensile stresses were registered for porcelain rich interlayers (p=0.25) whereas the zirconia rich ones (p=8) yield the lowest tensile stresses. In addition, the maximum stresses in a graded structure can be tailored by altering compositional gradients. A decrease in maximum stresses with increasing values of p (a scaling exponent in the power law function) was observed. Our findings showed a good agreement between the analytical and simulated models, particularly in the tensile region of the disc. Graded zirconia-feldspathic porcelain composites exhibited a more favourable stress distribution relative to conventional bilayered systems. This fact can significantly impact the clinical performance of zirconia-feldspathic porcelain prostheses, namely reducing the fracture incidence of zirconia and the chipping and delamination of porcelain.
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Affiliation(s)
- Douglas Fabris
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Júlio C.M. Souza
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
- School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis/SC, Brazil
| | - Filipe S. Silva
- CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Márcio Fredel
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Joana Mesquita-Guimarães
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
| | - Yu Zhang
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York University, New York, USA
| | - Bruno Henriques
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
- School of Dentistry (DODT), Post-Graduation Program in Dentistry (PPGO), Federal University of Santa Catarina, Campus Trindade, 88040-900, Florianópolis/SC, Brazil
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Silva FS, da Silva AA, Rebêlo JMM. An Evaluation of Light-Emitting Diode (LED) Traps at Capturing Phlebotomine Sand Flies (Diptera: Psychodidae) in a Livestock Area in Brazil. J Med Entomol 2016; 53:634-638. [PMID: 27026156 DOI: 10.1093/jme/tjw016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/13/2016] [Indexed: 06/05/2023]
Abstract
A study to evaluate the use of light-emitting diodes (LEDs) as an attractant for phlebotomine sand flies at two animal pens in a livestock area in Brazil was performed. Light-suction traps were operated overnight with the following light sources: green, blue, and incandescent (control) lights. In total, 22 individual collections were made at each site and 44 with each trap type. In total, 2,542 specimens belonging to 14 phlebotomine species were collected. The most abundant species in the light traps were Nyssomyia whitmani, Evandromyia evandroi, Micropygomyia goiana, Lutzomyia longipalpis, and Bichromomyia flaviscutellata Taking the two sites together, the green-LED light was the most attractive, followed by the blue and incandescent lights, and the difference between the green-LED and the control was statistically significant. Most species were green-biased at both sites, but some species-specific differences were observed. However, even with these differences, the standard incandescent light was outcompeted by LEDs. The green-LED-biased response observed in the present study, together with numerous advantages in favor of LEDs, suggests that the green-LED light source can be used as an effective substitute for the currently used incandescent bulb in monitoring traps for phlebotomine sand flies in Brazil.
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Affiliation(s)
- F S Silva
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, Campus IV, Chapadinha, MA 65500-000, Brazil (; ),
- Programa de Pós-Graduação, Rede de Biodiversidade e Biotecnologia da Amazônia, São Luis, MA 65085-580, Brasil
| | - A A da Silva
- Laboratory of Medical Entomology, Center for Agrarian and Environmental Sciences, Federal University of Maranhão, Campus IV, Chapadinha, MA 65500-000, Brazil (; )
| | - J M M Rebêlo
- Programa de Pós-Graduação, Rede de Biodiversidade e Biotecnologia da Amazônia, São Luis, MA 65085-580, Brasil
- Laboratório de Entomologia e Vetores, Universidade Federal do Maranhão, Campus I, São Luis, MA 65085-580, Brasil
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Souza JCM, Silva JB, Aladim A, Carvalho O, Nascimento RM, Silva FS, Martinelli AE, Henriques B. Effect of Zirconia and Alumina Fillers on the Microstructure and Mechanical Strength of Dental Glass Ionomer Cements. Open Dent J 2016; 10:58-68. [PMID: 27053969 PMCID: PMC4797684 DOI: 10.2174/1874210601610010058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 11/22/2022] Open
Abstract
Background: Glass-ionomer cements perform a protective effect on the dentin-pulp complex considering the F ions release and chemical bonding to the dental structures. On the other hand, those materials have poor physic-mechanical properties in comparison with the restorative resin composite. The main aim of this work was to evaluate the influence of zirconia and/or alumina fillers on the microstructure and strength of a resin modified glass-ionomer cement after thermal cycling. Methods: An in vitro experimental study was carried out on 9
groups (n = 10) of cylindrical samples (6 x 4 mm) made from resin
modified glass-ionomer (Vitremer, 3M, USA) with different contents of alumina
and/or zirconia fillers. A nano-hybrid resin composite was tested as a control
group. Samples were mechanically characterized by axial compressive tests and
electron scanning microscopy (SEM) coupled to energy dispersive X-ray
spectrophotometry (EDS), before and after thermal cycling. Thermal cycling
procedures were performed at 3000, 6000 and 10000 cycles in Fusayama´s
artificial saliva at 5 and 60 oC. Results: An improvement of compressive strength was noticed on glass-ionomer reinforced with alumina fillers in comparison with the commercial glass ionomer. SEM images revealed the morphology and distribution of alumina or zirconia in the microstructure of glass-ionomers. Also, defects such as cracks and pores were detected on the glass-ionomer cements. The materials tested were not affected by thermal cycling in artificial saliva. Conclusion: Addition of inorganic particles at nano-scale such as alumina can increase the mechanical properties of glass-ionomer cements. However, the presence of cracks and pores present in glass-ionomer can negatively affect the mechanical properties of the material because they are areas of stress concentration.
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Affiliation(s)
- Júlio C M Souza
- Center for Microelectromechanical Systems (CMEMS)-Uminho, Universidade do Minho, P-4800-058, Guimarães, Portugal; Post-Graduation Program in Dentistry (PPGO), Edif. CCS, School of Dentistry, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis/SC, Brazil
| | - Joel B Silva
- School of Dentistry, School of Health Sciences (FCS), Universidade Fernando Pessoa (UFP), Porto, Portugal
| | - Andrea Aladim
- Department of Materials Engineering, Universidade Federal do Rio Grande do Norte (UFRN), 59072-970, Natal/RN, Brazil
| | - Oscar Carvalho
- Center for Microelectromechanical Systems (CMEMS)-Uminho, Universidade do Minho, P-4800-058, Guimarães, Portugal
| | - Rubens M Nascimento
- Post-Graduation Program in Dentistry (PPGO), Edif. CCS, School of Dentistry, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis/SC, Brazil
| | - Filipe S Silva
- Center for Microelectromechanical Systems (CMEMS)-Uminho, Universidade do Minho, P-4800-058, Guimarães, Portugal
| | - Antonio E Martinelli
- Department of Materials Engineering, Universidade Federal do Rio Grande do Norte (UFRN), 59072-970, Natal/RN, Brazil
| | - Bruno Henriques
- Center for Microelectromechanical Systems (CMEMS)-Uminho, Universidade do Minho, P-4800-058, Guimarães, Portugal; Post-Graduation Program in Dentistry (PPGO), Edif. CCS, School of Dentistry, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis/SC, Brazil; Ceramic and Composite Materials Research Group (CERMAT), Universidade Federal de Santa Catarina (UFSC), Campus Trindade, Florianópolis/SC, Brazil
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Martins DC, Albuquerque PMC, Silva FS, Rebêlo JMM. First record of Aglae caerulea (Hymenoptera, Apidae, Euglossini) in Brazilian Cerrado east of the Amazon Region, Maranhão State, Brazil. BRAZ J BIOL 2016; 76:554-6. [PMID: 26959953 DOI: 10.1590/1519-6984.06415] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 09/03/2015] [Indexed: 11/21/2022] Open
Affiliation(s)
- D C Martins
- Programa de Pós-graduação em Biodiversidade e Conservação, Universidade Federal do Maranhão, São Luís, MA, Brazil
| | - P M C Albuquerque
- Departamento de Biologia, Universidade Federal do Maranhão, São Luís, MA, Brazil
| | - F S Silva
- Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, MA, Brazil
| | - J M M Rebêlo
- Departamento de Patologia, Universidade Federal do Maranhão, São Luís, MA, Brazil
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Sampaio M, Buciumeanu M, Henriques B, Silva FS, Souza JC, Gomes JR. Tribocorrosion behavior of veneering biomedical PEEK to Ti6Al4V structures. J Mech Behav Biomed Mater 2016; 54:123-30. [DOI: 10.1016/j.jmbbm.2015.09.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 09/08/2015] [Accepted: 09/10/2015] [Indexed: 11/26/2022]
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Souza JCM, Tajiri HA, Morsch CS, Buciumeanu M, Mathew MT, Silva FS, Henriques B. Tribocorrosion Behavior of Ti6Al4V Coated with a Bio-absorbable Polymer for Biomedical Applications. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s40735-015-0029-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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