1
|
Physicochemical Properties of Dentine Subjected to Microabrasive Blasting and Its Influence on Bonding to Self-Adhesive Prosthetic Cement in Shear Bond Strength Test: An In Vitro Study. MATERIALS 2022; 15:ma15041476. [PMID: 35208013 PMCID: PMC8875517 DOI: 10.3390/ma15041476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/06/2022] [Accepted: 02/14/2022] [Indexed: 12/10/2022]
Abstract
The aim of this in vitro study was to assess the influence of microabrasive blasting on the physicochemical properties of dentine and shear bond strength (SBS) of self-adhesive resin cement (Maxcem Elite, Kerr, Orange, CA, USA) bonded to the dentine surface. Ninety cylindrical specimens with exposed dentine of human teeth were prepared and divided into three randomized, parallel sample sets A, B, and C. Groups B and C were subjected to abrasive blasting using a micro-sandblasting device (Microetcher IIa, Danville Materials, Carlsbad, CA, USA) with two gradations of Al2O3 abrasives (Group B, abrasion with a gradation of 50 μm; group C, abrasion with a gradation of 27 μm). SEM imaging, profilometry, chemical composition analysis, contact angle measurements, surface free energy, and SBS tests were performed. The resulting data were statistically analyzed using the Statistica software (ver. 13.3, Tibco Software Inc., Palo Alto, CA, USA). Microabrasive blasting caused changes in surface topography, structural features, and the connection strength between the dentin surface and self-adhesive prosthetic cement. Air microabrasion through the multifactorial positive reorganization of the treated surface of dentine is recommended as a pretreatment method in fixed prosthodontics adhesive cementation protocols.
Collapse
|
2
|
Ismail HS, Ali AI, Abo El-Ella MA, Mahmoud SH. Effect of different polishing techniques on surface roughness and bacterial adhesion of three glass ionomer-based restorative materials: In vitro study. J Clin Exp Dent 2020; 12:e620-e625. [PMID: 32905005 PMCID: PMC7462382 DOI: 10.4317/jced.56616] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 02/24/2020] [Indexed: 02/07/2023] Open
Abstract
Background Although many reports concluded that polishing of glass ionomers is crucial for smoother surface and limiting the adhesion of cariogenic bacteria, there is no specific surface treatment protocol recommended. A novel material in the same category was released recently claimed to have surface smoothness comparable to resin composite and bacterial adhesion less than other types of glass ionomers. In this study, different polishing systems were tested with three glass ionomers one of them is the novel material to find the most appropriate polishing protocol. Objectives: To evaluate and compare the surface roughness and bacterial adhesion to resin modified glass ionomer, bioactive ionic resin and conventional glass ionomer restorative materials after different polishing protocols in vitro. Material and Methods The materials tested includes resin modified glass ionomer, bioactive ionic resin, and conventional glass ionomer. The polishing protocols were divided into four groups: group 1 = (Mylar matrix strips, Control), group 2 = (one-step, PoGo), group 3 = (two-step, Prisma Gloss) and group 4 = (three-step, Sof-Lex). From each material, eleven cylindrical specimens were prepared for each group according to the manufacturers' instructions. The surface roughness for all specimens was measured using atomic force microscope in tapping mode. the same specimens were subjected to bacterial adhesion testing after being coated with artificial saliva. Data were analyzed with two-way analysis of variance followed by Post hoc multiple comparisons. Results The highest Ra and S. mutans adhesion values were recorded for all materials in two-step group. The lowest Ra and S. mutans adhesion values were seen in one-step and three step groups. Conclusions One-step polishing system was more effective and may be preferable for polishing of the three studied glass ionomer-based materials compared to two-step and three-step systems. Key words:Activa bioactive restorative, glass ionomer, surface roughness, bacterial adhesion, surface treatment.
Collapse
Affiliation(s)
- Hoda S Ismail
- Assistant Lecturer, Operative Dentistry Dept, Faculty of Dentistry, Mansoura University, Egypt
| | - Ashraf I Ali
- Associate Professor, Operative Dentistry Dept, Faculty of Dentistry, Mansoura University, Egypt
| | | | - Salah H Mahmoud
- Clinical Professor and Chairman of Operative Dentistry, Faculty of Dentistry, Mansoura University, Egypt
| |
Collapse
|
3
|
Hoornaert A, Vidal L, Besnier R, Morlock JF, Louarn G, Layrolle P. Biocompatibility and osseointegration of nanostructured titanium dental implants in minipigs. Clin Oral Implants Res 2020; 31:526-535. [PMID: 32058629 DOI: 10.1111/clr.13589] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 10/31/2019] [Accepted: 12/22/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES It is well known that surface treatments of dental implants have a great impact on their rate of osseointegration. The aim of this study was to compare the biocompatibility and the bone-implant contact (BIC) of titanium dental implants with different surface treatments. MATERIAL AND METHODS Test implants (Biotech Dental) had a nanostructured surface and control implants (Anthogyr) were grit-blasted with biphasic calcium phosphate and acid-etched surface. Both titanium implants were inserted in mandible and maxillary bones of 6 Yucatan minipigs for 4 and 12 weeks (n = 10 implants/group). Biocompatibility and osseointegration were evaluated by non-decalcified histology and back-scattered electron microscopy images. RESULTS The reading of histology sections by an antomo-pathologist indicated that the test implants were considered non-irritating to the surrounding tissues and thus biocompatible compared with control implants. The BIC values were higher for test than for control dental implants at both 4 and 12 weeks. CONCLUSIONS In summary, the new nanostructured titanium dental implant is considered biocompatible and showed a better osseointegration than the control implant at both 4 and 12 weeks.
Collapse
Affiliation(s)
- Alain Hoornaert
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France.,Inserm, UMR 1238, PHY-OS, Bone Sarcomas and Remodeling of Calcified Tissues, Faculty of Medicine, University of Nantes, Nantes, France
| | - Luciano Vidal
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Romain Besnier
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Jean-Francois Morlock
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Guy Louarn
- Institut des Matériaux Jean Rouxel (IMN), CNRS, University of Nantes, Nantes, France
| | - Pierre Layrolle
- Inserm, UMR 1238, PHY-OS, Bone Sarcomas and Remodeling of Calcified Tissues, Faculty of Medicine, University of Nantes, Nantes, France
| |
Collapse
|
4
|
Abstract
Microbial adhesion to intraoral biomaterials is associated with surface roughness. For the prevention of oral pathologies, smooth surfaces with little biofilm formation are required. Ideally, appropriate roughness parameters make microbial adhesion predictable. Although a multitude of parameters are available, surface roughness is commonly described by the arithmetical mean roughness value (Ra). The present study investigates whether Ra is the most appropriate roughness parameter in terms of prediction for microbial adhesion to dental biomaterials. After four surface roughness modifications using standardized polishing protocols, zirconia, polymethylmethacrylate, polyetheretherketone, and titanium alloy specimens were characterized by Ra as well as 17 other parameters using confocal microscopy. Specimens of the tested materials were colonized by C. albicans or S. sanguinis for 2 h; the adhesion was measured via luminescence assays and correlated with the roughness parameters. The adhesion of C. albicans showed a tendency to increase with increasing the surface roughness—the adhesion of S. sanguinis showed no such tendency. Although Sa, that is, the arithmetical mean deviation of surface roughness, and Rdc, that is, the profile section height between two material ratios, showed higher correlations with the microbial adhesion than Ra, these differences were not significant. Within the limitations of this in-vitro study, we conclude that Ra is a sufficient roughness parameter in terms of prediction for initial microbial adhesion to dental biomaterials with polished surfaces.
Collapse
|
5
|
Dhaliwal JS, Rahman NA, Knights J, Ghani H, de Albuquerque Junior RF. The effect of different surface topographies of titanium implants on bacterial biofilm: a systematic review. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0638-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
|
6
|
Ly NTK, Shin H, Gupta KC, Kang IK, Yu W. Bioactive Antibacterial Modification of Orthodontic Microimplants Using Chitosan Biopolymer. Macromol Res 2019. [DOI: 10.1007/s13233-019-7069-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
7
|
Hung HT, Ye DQ, Lai CH. Comparison of the adhesion of Streptococcus sanguinis to commonly used dental alloys stratified by gold content. J Dent Sci 2016; 11:437-442. [PMID: 30895009 PMCID: PMC6395293 DOI: 10.1016/j.jds.2016.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 07/25/2016] [Indexed: 11/30/2022] Open
Abstract
Background/purpose Streptococcus sanguinis is an early colonizer of biofilm and plays a key role in the process of adhesion to prosthetic surfaces by facilitating the adhesion of later colonizers. The main aim of this study was to determine if S. sanguinis is affected by the gold concentration dental prosthetic alloys. Materials and methods Five commonly used alloys with varying degrees of gold concentration were selected for this study. We evaluated the ability of S. sanguinis ATCC strain 10556 to adhere to each of these alloys by counting the number of cells that adhered to each of the tested alloys. Each alloy was also assessed for cell adherence using scanning electron microscopy. One-way analysis of variance and Student–Newman–Keuls comparison test were used for statistical analysis based on cell counts from each well for the test and control groups. Results The highest concentration of bacterial cells adhered best to pure gold alloy (458 ± 8) followed by 88.4% gold Je alloy (382.33 ± 2), 56% gold Wi alloy (269 ± 4), 2% gold Es alloy (212.33 ± 2), and nongold Re alloy (183 ± 3). Based on the cell counts and scanning electron microscopy observations, there was a clear correlation between gold concentration and S. sanguinis adherence. Conclusion The findings of this study suggest that alloys with a lower gold concentration may result in lower bacterial colonization rates and may reduce the risk of invasive infections. When choosing an alloy, low gold concentrations may be a better clinical choice.
Collapse
Affiliation(s)
- Hung Te Hung
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Mei-San Road, Hefe 230032, Anhui, China
| | - Dong Qing Ye
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Mei-San Road, Hefe 230032, Anhui, China
| | - Chern Hsiung Lai
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, San-Ming District, Kaohsiung, Taiwan
| |
Collapse
|
8
|
Bacterial Adhesion and Surface Roughness for Different Clinical Techniques for Acrylic Polymethyl Methacrylate. Int J Dent 2016; 2016:8685796. [PMID: 27516775 PMCID: PMC4969518 DOI: 10.1155/2016/8685796] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 03/13/2016] [Indexed: 11/17/2022] Open
Abstract
This study sought to assess the effect of different surface finishing and polishing protocols on the surface roughness and bacterial adhesion (S. sanguinis) to polymethyl methacrylates (PMMA). Fifty specimens were divided into 5 groups (n = 10) according to their fabrication method and surface finishing protocol: LP (3 : 1 ratio and laboratory polishing), NF (Nealon technique and finishing), NP (Nealon technique and manual polishing), MF (3 : 1 ratio and manual finishing), and MP (3 : 1 ratio and manual polishing). For each group, five specimens were submitted to bacterial adhesion tests and analyzed by scanning electron microscopy (SEM). Two additional specimens were subjected to surface topography analysis by SEM and the remaining three specimens were subjected to surface roughness measurements. Data were compared by one-way ANOVA. The mean bacterial counts were as follows: NF, 19.6 ± 3.05; MP, 5.36 ± 2.08; NP, 4.96 ± 1.93; MF, 7.36 ± 2.45; and LP, 1.56 ± 0.62 (CFU). The mean surface roughness values were as follows: NF, 3.23 ± 0.15; MP, 0.52 ± 0.05; NP, 0.60 ± 0.08; MF, 2.69 ± 0.12; and LP, 0.07 ± 0.02 (μm). A reduction in the surface roughness was observed to be directly related to a decrease in bacterial adhesion. It was verified that the laboratory processing of PMMA might decrease the surface roughness and consequently the adhesion of S. sanguinis to this material.
Collapse
|
9
|
Aguayo S, Donos N, Spratt D, Bozec L. Probing the nanoadhesion of Streptococcus sanguinis to titanium implant surfaces by atomic force microscopy. Int J Nanomedicine 2016; 11:1443-50. [PMID: 27103802 PMCID: PMC4827898 DOI: 10.2147/ijn.s100768] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
As titanium (Ti) continues to be utilized in great extent for the fabrication of artificial implants, it is important to understand the crucial bacterium–Ti interaction occurring during the initial phases of biofilm formation. By employing a single-cell force spectroscopy technique, the nanoadhesive interactions between the early-colonizing Streptococcus sanguinis and a clinically analogous smooth Ti substrate were explored. Mean adhesion forces between S. sanguinis and Ti were found to be 0.32±0.00, 1.07±0.06, and 4.85±0.56 nN for 0, 1, and 60 seconds contact times, respectively; while adhesion work values were reported at 19.28±2.38, 104.60±7.02, and 1,317.26±197.69 aJ for 0, 1, and 60 seconds, respectively. At 60 seconds surface delays, minor-rupture events were modeled with the worm-like chain model yielding an average contour length of 668±12 nm. The mean force for S. sanguinis minor-detachment events was 1.84±0.64 nN, and Poisson analysis decoupled this value into a short-range force component of −1.60±0.34 nN and a long-range force component of −0.55±0.47 nN. Furthermore, a solution of 2 mg/mL chlorhexidine was found to increase adhesion between the bacterial probe and substrate. Overall, single-cell force spectroscopy of living S. sanguinis cells proved to be a reliable way to characterize early-bacterial adhesion onto machined Ti implant surfaces at the nanoscale.
Collapse
Affiliation(s)
- Sebastian Aguayo
- Department of Biomaterials and Tissue Engineering, University College London, London, UK
| | - Nikolaos Donos
- Periodontology Unit, University College London, London, UK
| | - Dave Spratt
- Division of Microbial Diseases, UCL Eastman Dental Institute, University College London, London, UK
| | - Laurent Bozec
- Department of Biomaterials and Tissue Engineering, University College London, London, UK
| |
Collapse
|
10
|
Bertoldi C, Lusuardi D, Battarra F, Sassatelli P, Spinato S, Zaffe D. The maintenance of inserted titanium implants: in-vitro evaluation of exposed surfaces cleaned with three different instruments. Clin Oral Implants Res 2016; 28:57-63. [PMID: 26744027 DOI: 10.1111/clr.12759] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2015] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Changes to titanium implants smooth-surfaces after instrumentation were comparatively analyzed using low-vacuum scanning electron microscopy (LV-SEM) and white-light confocal (WLC) profilometry, to accurately evaluate curved surfaces. MATERIAL AND METHODS Sixty titanium implants screwed to their abutments were randomly split into three groups for cleaning treatment with (S) stainless-steel Gracey-curettes, (T) titanium Langer-curettes, and (P) an ultrasonic-device with the probe covered with a plastic-tip. One sector of each implant was left unprocessed (U). The other sectors were cleaned for either 60 s, to simulate a single cleaning session, or 180 s to simulate a series of sessions. Surface morphology was analyzed by LV-SEM, without metal sputtering. Quantitative evaluations of the roughness of surfaces were performed using a WLC-profilometer. The Wilcoxon and the Mann-Whitney tests were used in statistical comparisons. RESULTS U-surfaces showed that thin transverse ridges and grooves, i.e. a polarized surface roughness was substantially compromised after S-instrumentation. Small surface alterations, increasing with time, were also recorded after T-·and·P-instrumentation, although to a lesser degree. The gap of the fixture-abutment connection appeared almost completely clean after T-, clotted with titanium debris after S-, and clotted with plastic debris after P-treatment. The mean roughness (Ra) was unchanged after P-, significantly increased after S- and decreased after T-treatment, when compared with U. The Rz roughness-parameter, calculated along the fixture Y-axis, of S, T, and P resulted similar and significantly lower than that of U. Rz (X-axis) resulted unchanged after P-, slightly increased (+40%) after T-, and greatly increased (+260%) after S-treatment, this latter being statistically significant when compared with U. CONCLUSIONS The careful use of titanium-curettes could produce only minimal smooth surface alteration particularly over prolonged treatments, and avoid debris production that could endanger implant preservation.
Collapse
Affiliation(s)
- Carlo Bertoldi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Paolo Sassatelli
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Modena, Italy
| | | | - Davide Zaffe
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| |
Collapse
|
11
|
Ranieri R, Ferreira A, Souza E, Arcoverde J, Dametto F, Gade-Neto C, Seabra F, Sarmento C. The Bacterial Sealing Capacity of Morse Taper Implant–Abutment Systems in Vitro. J Periodontol 2015; 86:696-702. [DOI: 10.1902/jop.2015.140623] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
12
|
Kweon H, Lee SW, Hahn BD, Lee YC, Kim SG. Hydroxyapatite and silk combination-coated dental implants result in superior bone formation in the peri-implant area compared with hydroxyapatite and collagen combination-coated implants. J Oral Maxillofac Surg 2014; 72:1928-36. [PMID: 25234528 DOI: 10.1016/j.joms.2014.06.455] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 06/11/2014] [Accepted: 06/30/2014] [Indexed: 01/28/2023]
Abstract
PURPOSE The objective of this study was to compare bone formation after installation of uncoated (UC), hydroxyapatite-coated (HA), collagen plus HA-coated (CH), and silk plus HA-coated (SH) implants. MATERIALS AND METHODS Implants in the UC group had acid-etched surfaces. Surface coating was applied using the aerosol deposition method. Cellular responses on the coated surfaces were examined with scanning electron microscopy. Cellular responses to the surfaces were studied with the corresponding coated discs and MG63 cells. Subsequently, 3-(4, 5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and alkaline phosphatase (ALP) assays were performed. Peri-implant bone formation was evaluated with the rabbit tibia model. Twenty-four implants from each group were installed. The animals were sacrificed 6 weeks after implant installation. Peri-implant bone formation and implant-to-bone contact were measured in histologic sections. Significance of differences across groups was evaluated using analysis of variance. RESULTS Scanning electron microscopic images showed that the CH and SH groups exhibited cells that appeared more spread out than those in the other groups. The SH group exhibited the highest value in the MTT assay. The CH group exhibited the highest level of ALP activity. Comparisons of these modifications with the acid-etched surfaces showed that the CH and SH groups displayed significantly greater peri-implant bone formation (P < .001). CONCLUSION The SH group displayed significantly greater new bone formation and bone-to-implant contact than did the other groups.
Collapse
Affiliation(s)
- HaeYong Kweon
- Researcher, Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
| | - Sang-Woon Lee
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Gangneung Asan Hospital, Gangneung, Republic of Korea
| | - Byung-Dong Hahn
- Researcher, Powder and Ceramics Division, Korea Institute of Materials Science, Changwon, Republic of Korea
| | - Yong-Chan Lee
- Clinician, Department of Oral and Maxillofacial Surgery, Bestian Hospital, Seoul, Republic of Korea
| | - Seong-Gon Kim
- Associate Professor and Chairman, Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea.
| |
Collapse
|
13
|
Gil FJ, Herrero-Climent M, Lázaro P, Rios JV. Implant-abutment connections: influence of the design on the microgap and their fatigue and fracture behavior of dental implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1825-1830. [PMID: 24719176 DOI: 10.1007/s10856-014-5211-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 03/28/2014] [Indexed: 06/03/2023]
Abstract
Microgap between implant and abutment can produce biological and mechanical problems such as peri-implantitis and/or fatigue failures. The aim of this study was to evaluate microgap size and fatigue behavior of external and internal connections. In both systems the torque to tighten the abutment screw of single crown abutments was 45 Ncm. Fifty implants for each connection type were studied. One subgroup (n = 5) was used by the observation and evaluation of the microgap, other (n = 5) was tested for fracture strength and the other (n = 40) was subjected to dynamic loading. The internal connection presents a lower microgap than the external ones. From fatigue results, the external hexagon interface showed superior result compared to the internal hexagon interfaces. The tolerances in the internal connections are better and favour the fatigue behavior but this factor alone is not sufficient to improve the fatigue response in relation to the external connections when the screw is subjected at the same torque. The external system presents a higher value of the area than the internal and it produces a better load distribution. Microgaps and mechanical properties are very important for the long-term behavior of the dental implants and these aspects should be known by the implantologists.
Collapse
Affiliation(s)
- F J Gil
- Department of Materials Science and Metallurgical Engineering, ETSEIB, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028, Barcelona, Spain,
| | | | | | | |
Collapse
|
14
|
Çalışkan N, Bayram C, Erdal E, Karahaliloğlu Z, Denkbaş EB. Titania nanotubes with adjustable dimensions for drug reservoir sites and enhanced cell adhesion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 35:100-5. [PMID: 24411357 DOI: 10.1016/j.msec.2013.10.033] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/04/2013] [Accepted: 10/29/2013] [Indexed: 10/26/2022]
Abstract
This study aims to generate a bactericidal agent releasing surface via nanotube layer on titanium metal and to investigate how aspect ratio of nanotubes affects drug elution time and cell proliferation. Titania nanotube layers were generated on metal surfaces by anodic oxidation at various voltage and time parameters. Gentamicin loading was carried out via simple pipetting and the samples were tested against S. aureus for the efficacy of the applied modification. Drug releasing time and cell proliferation were also tested in vitro. Titania nanotube layers with varying diameters and lengths were prepared after anodization and anodizing duration was found as the most effective parameter for amount of loaded drug and drug releasing time. Drug elution lasted up to 4 days after anodizing for 80 min of the samples, whereas release completed in 24 h when the samples were anodized for 20 min. All processed samples had bactericidal properties against S. aureus organism except unmodified titanium, which was also subjected to drug incorporation step. The anodization also enhanced water wettability and cell adhesion results. Anodic oxidation is an effective surface modification to enhance tissue-implant interactions and also resultant titania layer can act as a drug reservoir for the release of bactericidal agents. The use of implants as local drug eluting devices is promising but further in vivo testing is required.
Collapse
Affiliation(s)
- Nazlı Çalışkan
- Hacettepe University, Institute of Science and Technology, Nanotechnology and Nanomedicine Division, Beytepe, 06800, Ankara, Turkey
| | - Cem Bayram
- Hacettepe University, Institute of Science and Technology, Nanotechnology and Nanomedicine Division, Beytepe, 06800, Ankara, Turkey
| | - Ebru Erdal
- Hacettepe University, Institute of Science and Technology, Nanotechnology and Nanomedicine Division, Beytepe, 06800, Ankara, Turkey
| | - Zeynep Karahaliloğlu
- Hacettepe University, Institute of Science and Technology, Nanotechnology and Nanomedicine Division, Beytepe, 06800, Ankara, Turkey
| | - Emir Baki Denkbaş
- Hacettepe University, Institute of Science and Technology, Nanotechnology and Nanomedicine Division, Beytepe, 06800, Ankara, Turkey.
| |
Collapse
|
15
|
Implant surface factors and bacterial adhesion: a review of the literature. Int J Artif Organs 2013; 35:762-72. [PMID: 23138699 DOI: 10.5301/ijao.5000154] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2012] [Indexed: 12/22/2022]
Abstract
The microbiota that forms on implant surfaces placed in the human body can be highly resistant to antimicrobial agents and in some cases cause life-threatening infections. Consequently, to limit bacterial attachment to these surfaces and thereby minimize the risk of implant infection, the process of biofilm formation and bacterial attachment must be well-understood. The oral environment is considered to be an excellent model for research into biofilm formation and implant infection, accounting for many studies carried out in the field of dental medicine. Those studies show that the roughness, free energy, and material characteristics of the implant surface largely determine initial bacterial adhesion. This article reviews the relevant literature on these aspects of biofilm formation.
Collapse
|
16
|
Braem A, Van Mellaert L, Mattheys T, Hofmans D, De Waelheyns E, Geris L, Anné J, Schrooten J, Vleugels J. Staphylococcal biofilm growth on smooth and porous titanium coatings for biomedical applications. J Biomed Mater Res A 2013; 102:215-24. [PMID: 23661274 DOI: 10.1002/jbm.a.34688] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 01/28/2013] [Accepted: 02/12/2013] [Indexed: 12/14/2022]
Abstract
Implant-related infections are a serious complication in prosthetic surgery, substantially jeopardizing implant fixation. As porous coatings for improved osseointegration typically present an increased surface roughness, their resulting large surface area (sometimes increasing with over 700% compared to an ideal plane) renders the implant extremely susceptible to bacterial colonization and subsequent biofilm formation. Therefore, there is particular interest in orthopaedic implantology to engineer surfaces that combine both the ability to improve osseointegration and at the same time reduce the infection risk. As part of this orthopaedic coating development, the interest of in vitro studies on the interaction between implant surfaces and bacteria/biofilms is growing. In this study, the in vitro staphylococcal adhesion and biofilm formation on newly developed porous pure Ti coatings with 50% porosity and pore sizes up to 50 μm is compared to various dense and porous Ti or Ti-6Al-4V reference surfaces. Multiple linear regression analysis indicates that surface roughness and hydrophobicity are the main determinants for bacterial adherence. Accordingly, the novel coatings display a significant reduction of up to five times less bacterial surface colonization when compared to a commercial state-of-the-art vacuum plasma sprayed coating. However, the results also show that a further expansion of the porosity with over 15% and/or the pore size up to 150 μm is correlated to a significant increase in the roughness parameters resulting in an ascent of bacterial attachment. Chemically modifying the Ti surface in order to improve its hydrophilicity, while preserving the average roughness, is found to strongly decrease bacteria quantities, indicating the importance of surface functionalization to reduce the infection risk of porous coatings.
Collapse
Affiliation(s)
- Annabel Braem
- Department of Metallurgy and Materials Engineering (MTM), KU Leuven, B-3001, Heverlee, Belgium
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Zhang SM, Qiu J, Tian F, Guo XK, Zhang FQ, Huang QF. Corrosion behavior of pure titanium in the presence of Actinomyces naeslundii. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:1229-1237. [PMID: 23430335 DOI: 10.1007/s10856-013-4888-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 02/08/2013] [Indexed: 06/01/2023]
Abstract
It is well known that some microorganisms affect the corrosion of dental metal. Oral bacteria such as Actinomyces naeslundii may alter the corrosion behavior and stability of titanium. In this study, the corrosion behavior of titanium was studied in a nutrient-rich medium both in the presence and the absence of A. naeslundii using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS). A. naeslundii was able to colonize the surface of titanium and then form a dense biofilm. The SEM images revealed the occurrence of micropitting corrosion on the metal surface after removal of the biofilm. The electrochemical corrosion results from EIS showed a significant decrease in the corrosion resistant (R(p)) value after immersing the metal in A. naeslundii culture for 3 days. Correspondingly, XPS revealed a reduction in the relative levels of titanium and oxygen and an obvious reduction of dominant titanium dioxide (TiO₂) in the surface oxides after immersion of the metal in A. naeslundii culture. These results suggest that the metabolites produced by A. naeslundii can weaken the integrity and stability of the protective TiO₂ in the surface oxides, which in turn decreases the corrosion resistance of titanium, resulting in increased corrosion of titanium immersed in A. naeslundii solution as a function of time.
Collapse
Affiliation(s)
- Song-Mei Zhang
- Department of Prosthodontics, School of Stomatology, Shanghai Ninth People's Hospital, Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, China
| | | | | | | | | | | |
Collapse
|
18
|
Zhu P, Lin H, Han Y, Lin Y, Xu Y, Zhang Z. A computational fluid dynamic analysis of peri-bracket salivary flow influencing the microbial and periodontal parameters. PLoS One 2013; 8:e62242. [PMID: 23620815 PMCID: PMC3631146 DOI: 10.1371/journal.pone.0062242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 03/19/2013] [Indexed: 11/24/2022] Open
Abstract
Fixed vestibular appliances decrease the “self-cleansing” action of saliva and promote aggregation of dental plaque by disturbing the salivary flow field on tooth surfaces, leading to a higher prevalence of enamel demineralization and periodontal diseases. In the current study, we investigated the salivary dynamic characteristics of plaque retention and periodontal status around appliances during orthodontic treatment. By reconstructing lower central incisors and orthodontic appliances, we simulated saliva flow on the tooth surface and then characterized and quantified the salivary flow pattern surrounding the bracket and archwire. In parallel, we tested the total peri-bracket bacterial counts and periodontal status to assess interrelations. Our results demonstrate that orthodontic appliances disturb the salivary flow field on tooth surfaces and can lead to a decrease in salivary velocity and an increase in bacterial numbers. Local vortexes forming in the areas gingival to the bracket, together with the narrow space limitation, contributed to the periodontal inflammatory response. This study confirms that changes in salivary flow are an obvious predisposing factor for bacterial accumulation, and advances the ability to replicate, invitro, the salivary characteristics of plaque retention and periodontal status around appliances during orthodontic treatment.
Collapse
Affiliation(s)
- Ping Zhu
- Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, People’s Republic of China
| | - Han Lin
- Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, People’s Republic of China
| | - Yi Han
- Department of Applied Mechanics and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Yi Lin
- Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, People’s Republic of China
| | - Yue Xu
- Department of Orthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, People’s Republic of China
- * E-mail:
| | - Zhaoqiang Zhang
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangzhou Medical College, Guangzhou, Guangdong, People’s Republic of China
| |
Collapse
|
19
|
Rodríguez-Hernández AG, Muñoz-Tabares JA, Godoy-Gallardo M, Juárez A, Gil FJ. S. sanguinis adhesion on rough titanium surfaces: Effect of culture media. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:714-20. [DOI: 10.1016/j.msec.2012.10.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 07/19/2012] [Accepted: 10/28/2012] [Indexed: 11/25/2022]
|