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Domingo MG, Kurtz M, Maglione G, Martin M, Brites F, Tasat DR, Olmedo DG. Chronic exposure to TiO 2 micro- and nano particles: A biochemical and histopathological experimental study. J Biomed Mater Res B Appl Biomater 2024; 112:e35443. [PMID: 38968028 DOI: 10.1002/jbm.b.35443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 04/08/2024] [Accepted: 06/09/2024] [Indexed: 07/07/2024]
Abstract
The aim of this work was to analyze the effects of long-term exposure to titanium dioxide (TiO2) micro- (MPs) and nanoparticles (NPs) (six and 12 months) on the biochemical and histopathological response of target organs using a murine model. Male Wistar rats were intraperitoneally injected with a suspension of TiO2 NPs (5 nm; TiO2-NP5 group) or MPs (45 μm; TiO2-NP5 group); the control group was injected with saline solution. Six and 12 months post-injection, titanium (Ti) concentration in plasma and target organs was determined spectrometrically (ICP-MS). Blood smears and organ tissue samples were evaluated by light microscopy. Liver and kidney function was evaluated using serum biochemical parameters. Oxidative metabolism was assessed 6 months post-injection (determination of superoxide anion by nitroblue tetrazolium (NBT) test, superoxide dismutase (SOD) and catalase (CAT), lipid peroxidation, and paraoxonase 1). Titanium (Ti) concentration in target organs and plasma was significantly higher in the TiO2-exposed groups than in the control group. Histological evaluation showed the presence of titanium-based particles in the target organs, which displayed no structural alterations, and in blood monocytes. Oxidative metabolism analysis showed that TiO2 NPs were more reactive over time than MPs (p < .05) and mobilization of antioxidant enzymes and membrane damage varied among the studied organs. Clearance of TiO2 micro and nanoparticles differed among the target organs, and lung clearance was more rapid than clearance from the lungs and kidneys (p < .05). Conversely, Ti concentration in plasma increased with time (p < .05). In conclusion, neither serum biochemical parameters nor oxidative metabolism markers appear to be useful as biomarkers of tissue damage in response to TiO2 micro- and nanoparticle deposits at chronic time points.
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Affiliation(s)
- Mariela Gisele Domingo
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Anatomía Patológica, Buenos Aires, Argentina
- Becario de Investigación de la Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Melisa Kurtz
- CONICET, Buenos Aires, Argentina
- Instituto de Tecnologías Emergentes y Ciencias Aplicadas (ITECA), Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín-CONICET, Buenos Aires, Argentina
| | - Guillermo Maglione
- Instituto de Tecnologías Emergentes y Ciencias Aplicadas (ITECA), Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín-CONICET, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Histología y Embriología, Buenos Aires, Argentina
| | | | - Fernando Brites
- CONICET, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Bioquímica Clínica, Laboratorio de Lípidos y Lipoproteínas, Buenos Aires, Argentina
| | - Deborah Ruth Tasat
- Instituto de Tecnologías Emergentes y Ciencias Aplicadas (ITECA), Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín-CONICET, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Histología y Embriología, Buenos Aires, Argentina
| | - Daniel Gustavo Olmedo
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Anatomía Patológica, Buenos Aires, Argentina
- CONICET, Buenos Aires, Argentina
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Tchinda A, Didelot A, Choquet P, Lerebours A, Kouitat-Njiwa R, Bravetti P. Innovative Bioactive Ca-SZ Coating on Titanium Dental Implants: A Multidimensional Structural and Elemental Analysis. J Funct Biomater 2024; 15:155. [PMID: 38921529 PMCID: PMC11205193 DOI: 10.3390/jfb15060155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/28/2024] [Accepted: 05/31/2024] [Indexed: 06/27/2024] Open
Abstract
The design of new, biomimetic biomaterials is of great strategic interest and is converging for many applications, including in implantology. This study explores a novel approach to improving dental implants. Although endosseous TA6V alloy dental implants are widely used in oral implantology, this material presents significant challenges, notably the prevalence of peri-implantitis. Therefore, in this study, we investigate a new advance in the design of hybrid medical devices. This involves the design of a Ca-SZ coating deposited by PVD on a TA6V substrate. This approach aims to overcome the inherent limitations of each of these materials, namely TA6V's susceptibility to peri-implantitis on the one hand and zirconia's excessively high Young's modulus compared with bone on the other, while benefiting from their respective advantages, such as the ductility of TA6V and the excellent biocompatibility of zirconia, offering relevant prospects for the design of high-performance implantable medical devices. This study integrates characterisation techniques, focusing on the structural and elemental analysis of the Ca-SZ coating by XRD and TEM. The results suggest that this coating combines a tetragonal structure, a uniform morphology with no apparent defects, a clean interface highlighting good adhesion, and a homogeneous composition of calcium, predisposing it to optimal biocompatibility. All of these findings make this innovative coating a particularly suitable candidate for application in dental implantology.
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Affiliation(s)
- Alex Tchinda
- Department of Micro and Nanomechanics for Life, Jean Lamour Institute, University of Lorraine, UMR 7198, 54011 Nancy, France (R.K.-N.)
| | - Aurélien Didelot
- Department of Micro and Nanomechanics for Life, Jean Lamour Institute, University of Lorraine, UMR 7198, 54011 Nancy, France (R.K.-N.)
| | - Patrick Choquet
- Materials and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
| | - Augustin Lerebours
- Department of Micro and Nanomechanics for Life, Jean Lamour Institute, University of Lorraine, UMR 7198, 54011 Nancy, France (R.K.-N.)
| | - Richard Kouitat-Njiwa
- Department of Micro and Nanomechanics for Life, Jean Lamour Institute, University of Lorraine, UMR 7198, 54011 Nancy, France (R.K.-N.)
| | - Pierre Bravetti
- Department of Micro and Nanomechanics for Life, Jean Lamour Institute, University of Lorraine, UMR 7198, 54011 Nancy, France (R.K.-N.)
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Vierling L, Liu CC, Wiedemeier D, Gubler A, Schmidlin PR. Assessing the Impact of Various Decontamination Instruments on Titanium and Zirconia Dental Implants: An In Vitro Study. Dent J (Basel) 2024; 12:136. [PMID: 38786534 PMCID: PMC11119916 DOI: 10.3390/dj12050136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/29/2024] [Accepted: 05/07/2024] [Indexed: 05/25/2024] Open
Abstract
This study investigates the impact of various instrumentation techniques on material removal and surface changes in titanium (Ti)- and zirconia (Zr) implant discs. Ti- and Zr discs were subjected to standardized experiments using various instruments including airflow, ultrasound, carbide, and diamond burs. Instrumentation was performed for 60 s with continuous automatic motion. Abrasion and changes in surface roughness were assessed using profilometry, while scanning electron microscopy was used to examine morphological changes and particle size. Carbide burs predominantly caused abrasion on Ti discs, while diamond burs caused more abrasion on Zr discs. The Ti discs were more susceptible to surface changes. However, among the materials tested, machined Zr discs treated with diamond burs produced the largest particle. In certain cases, a statistical significance (p < 0.05) was observed between the groups, while in others, there was no considerable difference among the means (p > 0.05). These results highlighted the statistical significance of our findings. These results found diverse alterations in surface characteristics of Ti- and Zr discs due to different instruments, with carbide and diamond burs causing notable effects. The findings highlight the need for a careful balance between promoting healing and minimizing harm during implantoplasty.
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Affiliation(s)
- Louisa Vierling
- Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri-Implant Diseases, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (L.V.); (C.C.L.); (A.G.)
| | - Chun Ching Liu
- Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri-Implant Diseases, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (L.V.); (C.C.L.); (A.G.)
| | - Daniel Wiedemeier
- Statistics Group, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland;
| | - Andrea Gubler
- Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri-Implant Diseases, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (L.V.); (C.C.L.); (A.G.)
| | - Patrick R. Schmidlin
- Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri-Implant Diseases, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (L.V.); (C.C.L.); (A.G.)
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Kohal RJ, Riesterer E, Vach K, Patzelt SBM, Iveković A, Einfalt L, Kocjan A, Hillebrecht AL. Fracture Resistance of a Bone-Level Two-Piece Zirconia Oral Implant System-The Influence of Artificial Loading and Hydrothermal Aging. J Funct Biomater 2024; 15:122. [PMID: 38786633 PMCID: PMC11122605 DOI: 10.3390/jfb15050122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/24/2024] [Accepted: 05/04/2024] [Indexed: 05/25/2024] Open
Abstract
Preclinical and clinical research on two-piece zirconia implants are warranted. Therefore, we evaluated the in vitro fracture resistance of such a zirconia oral implant system. The present study comprised 32 two-piece zirconia implants and abutments attached to the implants using a titanium (n = 16) or a zirconia abutment screw (n = 16). Both groups were subdivided (n = 8): group T-0 comprised implants with a titanium abutment screw and no artificial loading; group T-HL was the titanium screw group exposed to hydro-thermomechanical loading in a chewing simulator; group Z-0 was the zirconia abutment screw group with no artificial loading; and group Z-HL comprised the zirconia screw group with hydro-thermomechanical loading. Groups T-HL and Z-HL were loaded with 98 N and aged in 85 °C hot water for 107 chewing cycles. All samples were loaded to fracture. Kruskal-Wallis tests were executed to assess the loading/bending moment group differences. The significance level was established at a probability of 0.05. During the artificial loading, there was a single occurrence of an implant fracture. The mean fracture resistances measured in a universal testing machine were 749 N for group T-0, 828 N for group Z-0, 652 N for group T-HL, and 826 N for group Z-HL. The corresponding bending moments were as follows: group T-0, 411 Ncm; group Z-0, 452 Ncm; group T-HL, 356 Ncm; and group Z-HL, 456 Ncm. There were no statistically significant differences found between the experimental groups. Therefore, the conclusion was that loading and aging did not diminish the fracture resistance of the evaluated implant system.
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Affiliation(s)
- Ralf J. Kohal
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (E.R.)
| | - Ellen Riesterer
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (E.R.)
| | - Kirstin Vach
- Medical Center—University of Freiburg, Institute of Medical Biometry and Statistics, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany;
| | - Sebastian B. M. Patzelt
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (E.R.)
- Private Dental Clinic, 78658 Zimmern ob Rottweil, Germany
| | - Aljaž Iveković
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (A.I.); (L.E.)
| | - Lara Einfalt
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (A.I.); (L.E.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Andraž Kocjan
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (A.I.); (L.E.)
| | - Anna-Lena Hillebrecht
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (E.R.)
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Qin W, Shen MH, Gan N, Xing BH, Sun J, Zhao Z, Jiao T. Biological Properties of 3D-Printed Zirconia Implants with p-Cell Structures. J Dent Res 2024; 103:388-397. [PMID: 38374666 DOI: 10.1177/00220345231222819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024] Open
Abstract
Research on 3-dimensional (3D) printed porous zirconia-based dental implants is still in its infancy. This study aimed to evaluate the biological responses of novel zirconia implants with p-cell structures fabricated by 3D printing. The solid zirconia samples exhibited comparable density, 3-point flexural strength, and accelerated aging properties compared to specimens prepared previously by conventional methods. Cell-based experiments showed that the p-cell structure promoted cell proliferation, adhesion, and osteogenesis-related protein expression. Mechanical tests showed that both p-cell and control implants could withstand a torque of 35 Ncm without breaking. The mean maximum breaking loads of p-cell and control implants were 1,222.429 ± 115.591 N and 1,903.857 ± 250.673 N, respectively, which were much higher than the human physiological chewing force and human mean maximum occlusal force. An animal experiment showed that the bone trabeculae around the implants were significantly thicker, more numerous, and denser in the p-cell group than in the control group. This work could provide promising guidance for further exploring 3D printing techniques for porous zirconia bionic implants in dentistry.
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Affiliation(s)
- W Qin
- Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - M H Shen
- School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, China
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - N Gan
- Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - B H Xing
- School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, China
| | - J Sun
- Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - Z Zhao
- School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, China
| | - T Jiao
- Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
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Sadid-Zadeh R, Lin K, Li R, Nagy K. Fracture strength of screw-retained zirconia crowns assembled on zirconia and titanium implants. J Prosthodont 2024; 33:273-280. [PMID: 36973859 DOI: 10.1111/jopr.13683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/04/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023] Open
Abstract
PURPOSE This in vitro study evaluated the fracture strength of screw-retained zirconia crowns connected to zirconia (Zr) and titanium (Ti) implants after undergoing a simulation of 5 years of clinical use. MATERIALS AND METHODS Forty-eight screw-retained zirconia crowns were fabricated and assembled on four implant systems, with 12 in each group: (1) Zr implant (pure ceramic; Straumann AG) (PZr); (2) Zr implant (NobelPearl; Nobel Biocare) (NPZr); (3) Ti-Zr implant (Bone Level Roxolid; Straumann AG) (RSTiZr); (4) Ti implant (Conical Connection PMC; Nobel Biocare) (NRTi). Crowns were luted to their associated abutments using resin cement and then torqued to their assigned implants at the recommended torque value. Specimens were subjected to dynamic loading for 1,200,000 loading cycles. Fracture strength, measured in Newtons (N), was tested under static compression load using a universal testing machine at an angle of 30°. One-way ANOVA and Tukey's multiple comparisons post hoc test were used to compare the mean fracture values between the groups at a significance level of 0.05. RESULTS The average fracture strengths for the RSTiZr and NRTi groups were 1207 ± 202 and 1073 ± 217 N, respectively, which was significantly (p < 0.0001) higher than the PZr and NPZr groups (712 ± 76 and 571.6 ± 167 N, respectively). However, no significant difference was found between the fracture strength value of RSTiZr and NRTi (p = 0.260) or PZr and NPZr (p = 0.256) groups. CONCLUSIONS Zirconia crowns connected to Zr implants have the potential to withstand the average physiological occlusal forces which occur in the anterior and premolar regions.
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Affiliation(s)
- Ramtin Sadid-Zadeh
- Department of Restorative Dentistry, University at Buffalo School of Dental Medicine, Buffalo, New York, USA
| | - Kevin Lin
- Department of Restorative Dentistry, University at Buffalo School of Dental Medicine, Buffalo, New York, USA
| | - Rui Li
- Department of Restorative Dentistry, University at Buffalo School of Dental Medicine, Buffalo, New York, USA
| | - Katalin Nagy
- Head of Oral Surgery, Faculty of Dentistry, University of Szeged, Szeged, Hungary
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Bollen C, Hakobayan G, Jörgens M. One-piece versus two-piece ceramic dental implants. Br Dent J 2024; 236:383-387. [PMID: 38459309 PMCID: PMC10923691 DOI: 10.1038/s41415-024-7123-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 09/05/2023] [Accepted: 09/18/2023] [Indexed: 03/10/2024]
Abstract
In this narrative review, a structured comparison between one-piece and two-piece zirconia dental implants is highlighted. Ceramic dental implants have long ceased to be hype; on the contrary, they can offer a significant addition to the daily dental implant practice. Not only do their favourable aesthetics play a significant role, but their ability to work completely metal-free is of added value, particularly for patients with a proven allergy for Grade 5 titanium. Furthermore, the fact that peri-implantitis seems to appear only incidentally is an important supporting argument for their use as well. Whereas the original design of zirconia implants was formerly always of a one-piece/one-phase structure (the monobloc design), nowadays, two-piece/two-phase designs (the so-called hybrid concept) are also widely utilised to restore missing teeth. Both concepts have advantages and disadvantages, scientifically as well as clinically.For this paper, relevant articles from the recent scientific literature were selected from PubMed. The aim was to identify and summarise what has previously been published on one-piece versus two-piece ceramic implants. This article will compare the benefits and drawbacks of one-piece versus two-piece ceramic implants based on clinical- (design, different sizes, surgical protocol, prosthetics), scientific- (loading and eventual complications) and patient-related (costs and long-time perspectives) criteria.
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Affiliation(s)
- Curd Bollen
- Professor, Ulster University, College of Medicine and Dentistry, Birmingham, UK.
| | - Gagik Hakobayan
- Professor and Head of Department of Oral and Maxillofacial Surgery, Yerevan State Medical University after Mkhitar Heratsi, Yerevan, Armenia
| | - Martin Jörgens
- Professor, University of Sevilla, Spain; MUHAS University, Dar es Salaam, Tanzania
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Mishra D, Basu B. Biomechanical analysis of peri-prosthetic bone response to hybrid threaded zirconia dental implants: An in silico model. J Mech Behav Biomed Mater 2024; 150:106310. [PMID: 38128471 DOI: 10.1016/j.jmbbm.2023.106310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/29/2023] [Accepted: 12/03/2023] [Indexed: 12/23/2023]
Abstract
The biomechanical response of mandibular bone determines primary stability and concomitant osseointegration of dental implants. This study explores the impact of nature of loading and bone conditions on biomechanical response of hybrid threaded single-piece zirconia dental implants. To develop such understanding, three implants (SQ_V, V_BUT, and V_V), with different combinations of threads, square (SQ), buttress (BUT), and triangular (V), have been investigated. Finite Element Analysis (FEA) was carried out to simulate implantation at the molar position of mandible of varying densities under axial (≤500 N) and oblique (118.2 N) loadings. Patient-specific bone conditions (for a wider population) were considered by scaling the density and the elastic modulus of mandible to represent, 'weak', 'healthy', and 'strong' bone conditions. FEA results revealed that SQ_V and V_BUT implants exhibited a better biomechanical response without significant variation (<0.5%) in von Mises stress, regardless of bone density and axial loadings. These implants are predicted to perform with clinically acceptable factor of safety under investigated implantation scenarios, whereas V_BUT implant showed a larger variation (∼±12%). FEA simulation with oblique loading further validated such results. The 'weak' bone conditions resulted in maximum peri-implant microstrain, whereas 'strong and healthy' bone exhibited values close to the permissible range of physiological remodeling. The maximum micromotion (∼12.3 ± 6.2 μm for 'weak' bone) at bone-implant interface suggested that implant loosening and impaired osseointegration will not occur in any of selected virtual implantation cases. Both SQ_V and V_BUT implants will be considered further in implant development, involving manufacturing and product prototype validation. Taken together, the critical analysis of FEA results indicates a significant impact of bone density and distinct combinations of external threads on the biomechanical responses, in both the implant and the surrounding bone.
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Affiliation(s)
- Deepa Mishra
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bengaluru, 560012, India
| | - Bikramjit Basu
- Laboratory for Biomaterials, Materials Research Centre, Indian Institute of Science, Bengaluru, 560012, India; Centre for Biosystems Science and Engineering, Indian Institute of Science, Bangalore, 560012, India.
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Karunakaran H, Krithikadatta J, Doble M. Local and systemic adverse effects of nanoparticles incorporated in dental materials- a critical review. Saudi Dent J 2024; 36:158-167. [PMID: 38375379 PMCID: PMC10874805 DOI: 10.1016/j.sdentj.2023.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 08/23/2023] [Accepted: 08/28/2023] [Indexed: 02/21/2024] Open
Abstract
Introduction Nanotechnology is the science and engineering of nanoparticles whose dimensions range from 1 to 100 nm. Nanoparticles have special characteristics like increased surface area, high reactivity, and enhanced mechanical, thermal, and optical properties that make them attractive for use in dental applications. However, the use of nanoparticles in dental materials can have toxic effects on the human body. The objective of this paper is to discuss the toxic effects of various nanoparticles in dental materials, their adverse effect on human health, and measures to overcome such effects. Objectives Nanoparticles are used in the diagnosis, prevention, and treatment of oral diseases like dental caries, pulpo periodontal lesions, oral cancer, denture stomatitis, and candidiasis. Exposure to nanoparticles may occur to the dental professional, and the patient during procedures like restoration, finishing, and polishing. Such exposure to nanoparticles through inhalation, and ingestion causes toxic effects in the lungs, skin, brain, liver, and kidney. Proper risk assessment methods and preventive measures may help reduce these toxic effects to some extent. Significance Toxic effects of nanoparticles that are released during dental procedures, their route of exposure, and the concentration at which nanoparticles can induce toxic effects on the human body are discussed in detail in this review. The paper also aims to create awareness among dental professionals, students, and patients regarding nanoparticle exposure and its adverse effects, and methods to prevent and overcome these effects. Currently, it is ignored or taken lightly by the stakeholders and this review may throw light.
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Affiliation(s)
- Harini Karunakaran
- Department of Conservative Dentistry and Endodontics, SIMATS University, Chennai, India
| | | | - Mukesh Doble
- Department of Cariology, SIMATS University, Chennai, India
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Rahnama-Hezavah M, Mertowska P, Mertowski S, Skiba J, Krawiec K, Łobacz M, Grywalska E. How Can Imbalance in Oral Microbiota and Immune Response Lead to Dental Implant Problems? Int J Mol Sci 2023; 24:17620. [PMID: 38139449 PMCID: PMC10743591 DOI: 10.3390/ijms242417620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/09/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
Dental implantology is one of the most dynamically developing fields of dentistry, which, despite developing clinical knowledge and new technologies, is still associated with many complications that may lead to the loss of the implant or the development of the disease, including peri-implantitis. One of the reasons for this condition may be the fact that dental implants cannot yield a proper osseointegration process due to the development of oral microbiota dysbiosis and the accompanying inflammation caused by immunological imbalance. This study aims to present current knowledge as to the impact of oral microflora dysbiosis and deregulation of the immune system on the course of failures observed in dental implantology. Evidence points to a strong correlation between these biological disturbances and implant complications, often stemming from improper osseointegration, pathogenic biofilms on implants, as well as an exacerbated inflammatory response. Technological enhancements in implant design may mitigate pathogen colonization and inflammation, underscoring implant success rates.
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Affiliation(s)
- Mansur Rahnama-Hezavah
- Chair and Department of Oral Surgery, Medical University of Lublin, 20-093 Lublin, Poland; (M.R.-H.); (M.Ł.)
| | - Paulina Mertowska
- Department of Experimental Immunology, Medical University of Lublin, 20-093 Lublin, Poland; (S.M.); (E.G.)
| | - Sebastian Mertowski
- Department of Experimental Immunology, Medical University of Lublin, 20-093 Lublin, Poland; (S.M.); (E.G.)
| | - Julia Skiba
- Student Research Group of Experimental Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Karol Krawiec
- Student Research Group of Experimental Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Michał Łobacz
- Chair and Department of Oral Surgery, Medical University of Lublin, 20-093 Lublin, Poland; (M.R.-H.); (M.Ł.)
| | - Ewelina Grywalska
- Department of Experimental Immunology, Medical University of Lublin, 20-093 Lublin, Poland; (S.M.); (E.G.)
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Park WB, Moon J, Shin S, Hong JY. Oral Lichenoid Lesion following Dental Implant Placement and Successful Management with Free Gingival Graft: A Case Report with 10-Year Follow-Up. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:2188. [PMID: 38138291 PMCID: PMC10745084 DOI: 10.3390/medicina59122188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/10/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023]
Abstract
Titanium and metal alloys are widely used in implants, crowns, and bridges in implant dentistry owing to their biocompatibility. In this case report of a 45-year-old female patient, multiple implants were placed in five different sextants at different time points. Notably, oral lichenoid lesions (OLL) occurred in three sextants following implant placement, strongly suggesting that the dental implants or prostheses were the causative factors for OLL. The lesion was of the reticular type with erythematous surroundings and was symptomatic. Although several conservative treatments, including repeated topical application of corticosteroids, were repeatedly continued, no discernible improvement or alleviation of symptoms was observed. Consequently, surgical excision and replacement of the lesion with a free gingival graft (FGG) harvested from the palatal soft tissue were performed. No clinical symptoms or recurrence of lesions were observed during 10 years of follow-up post-FGG.
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Affiliation(s)
- Won-Bae Park
- Private Practice in Periodontics and Implant Dentistry, Seoul 02771, Republic of Korea;
| | - Junghun Moon
- Department of Dentistry, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea;
| | - Seungil Shin
- Department of Periodontology, Kyung Hee University School of Dentistry, Kyung Hee University Medical Center, Seoul 02447, Republic of Korea;
| | - Ji-Youn Hong
- Department of Periodontology, Kyung Hee University School of Dentistry, Kyung Hee University Medical Center, Seoul 02447, Republic of Korea;
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12
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Kohal RJ, Schikofski T, Adolfsson E, Vach K, Patzelt SBM, Nold J, Wemken G. Fracture Resistance of a Two-Piece Zirconia Implant System after Artificial Loading and/or Hydrothermal Aging-An In Vitro Investigation. J Funct Biomater 2023; 14:567. [PMID: 38132821 PMCID: PMC10743638 DOI: 10.3390/jfb14120567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/29/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023] Open
Abstract
The purpose of the present study was to assess the fracture resistance of a two-piece alumina-toughened zirconia implant system with a carbon-reinforced PEEK abutment screw. METHODS Thirty-two implants with screw-retained zirconia abutments were divided into four groups of eight samples each. Group 0 (control group) was neither loaded nor aged in a chewing simulator; group H was hydrothermally aged; group L was loaded with 98 N; and group HL was subjected to both hydrothermal aging and loading in a chewing simulator. One sample of each group was evaluated for t-m phase transformation, and the others were loaded until fracture. A one-way ANOVA was applied to evaluate differences between the groups. RESULTS No implant fracture occurred during the artificial chewing simulation. Furthermore, there were no statistically significant differences (p > 0.05) between the groups in terms of fracture resistance (group 0: 783 ± 43 N; group H: 742 ± 43 N; group L: 757 ± 86 N; group HL: 740 ± 43 N) and bending moment (group 0: 433 ± 26 Ncm; group H: 413 ± 23 Ncm; group L: 422 ± 49 Ncm; group HL: 408 ± 27 Ncm). CONCLUSIONS Within the limitations of the present investigation, it can be concluded that artificial loading and hydrothermal aging do not reduce the fracture resistance of the investigated implant system.
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Affiliation(s)
- Ralf-Joachim Kohal
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (T.S.); (J.N.); (G.W.)
| | - Tim Schikofski
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (T.S.); (J.N.); (G.W.)
| | - Erik Adolfsson
- RISE Research Institutes of Sweden, 431 53 Mölndal, Sweden;
| | - Kirstin Vach
- Medical Center—University of Freiburg, Institute for Medical Biometry and Statistics, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany;
| | - Sebastian Berthold Maximilian Patzelt
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (T.S.); (J.N.); (G.W.)
- Private Dental Clinic, 78658 Zimmern ob Rottweil, Germany
| | - Julian Nold
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (T.S.); (J.N.); (G.W.)
| | - Gregor Wemken
- Medical Center—University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (T.S.); (J.N.); (G.W.)
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13
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Gloc M, Przybysz S, Dulnik J, Kołbuk D, Wachowski M, Kosturek R, Ślęzak T, Krawczyńska A, Ciupiński Ł. A Comprehensive Study of a Novel Explosively Hardened Pure Titanium Alloy for Medical Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7188. [PMID: 38005116 PMCID: PMC10672667 DOI: 10.3390/ma16227188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
Pure titanium is gaining increasing interest due to its potential use in dental and orthopedic applications. Due to its relatively weak mechanical parameters, a limited number of components manufactured from pure titanium are available on the market. In order to improve the mechanical parameters of pure titanium, manufacturers use alloys containing cytotoxic vanadium and aluminum. This paper presents unique explosive hardening technology that can be used to strengthen pure titanium parameters. The analysis confirms that explosive induced α-ω martensitic transformation and crystallographic anisotropy occurred due to the explosive pressure. The mechanical properties related to residual stresses are very nonuniform. The corrosion properties of the explosive hardened pure titanium test do not change significantly compared to nonhardened titanium. The biocompatibility of all the analyzed samples was confirmed in several tests. The morphology of bone cells does not depend on the titanium surface phase composition and crystallographic orientation.
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Affiliation(s)
- Michał Gloc
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland; (A.K.); (Ł.C.)
| | - Sylwia Przybysz
- Institute of High Pressure Physics, Polish Academy of Sciences (Unipress), 29/37 Sokolowska St., 01-142 Warsaw, Poland;
| | - Judyta Dulnik
- Laboratory of Polymers and Biomaterials, Institute of Fundamental Technological Research, Polish Academy of Sciences, 4B Pawińskiego St., 02-106 Warsaw, Poland; (J.D.); (D.K.)
| | - Dorota Kołbuk
- Laboratory of Polymers and Biomaterials, Institute of Fundamental Technological Research, Polish Academy of Sciences, 4B Pawińskiego St., 02-106 Warsaw, Poland; (J.D.); (D.K.)
| | - Marcin Wachowski
- Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. S. Kaliskiego St., 00-908 Warsaw, Poland; (M.W.); (R.K.); (T.Ś.)
| | - Robert Kosturek
- Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. S. Kaliskiego St., 00-908 Warsaw, Poland; (M.W.); (R.K.); (T.Ś.)
| | - Tomasz Ślęzak
- Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. S. Kaliskiego St., 00-908 Warsaw, Poland; (M.W.); (R.K.); (T.Ś.)
| | - Agnieszka Krawczyńska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland; (A.K.); (Ł.C.)
| | - Łukasz Ciupiński
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland; (A.K.); (Ł.C.)
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14
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Watanabe M, Liu L, Ichikawa T. Are Allergy-Induced Implant Failures Actually Hypersensitivity Reactions to Titanium? A Literature Review. Dent J (Basel) 2023; 11:263. [PMID: 37999027 PMCID: PMC10670842 DOI: 10.3390/dj11110263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/02/2023] [Accepted: 11/08/2023] [Indexed: 11/25/2023] Open
Abstract
PURPOSE This literature review was performed to assess whether implant failures are associated with titanium allergy. MATERIALS AND METHODS An electronic search of the MEDLINE/PubMed, Cochrane Library, and Scopus databases up to April 2021 was conducted, and the obtained articles were independently assessed by two reviewers. Articles describing cases of implant failure in which the cause of implant failure was only identified as allergy were included. RESULTS Twelve studies were included. Eight studies identified Ti allergy by clinical examinations, of which four used patch tests, three used the lymphocyte transformation test (LTT)/memory lymphocyte immunostimulation assay (MELISA), and one used both tests. Nine studies reported cases of titanium hypersensitivity in combination with other systemic allergy-related disorders, with eight cases also showing positive results for Ni, Hg, Cr, and Co hypersensitivity. Ten papers reported the improvement of symptoms after the removal of the Ti implants and their replacement with zirconia implants, and two of these papers showed good results. CONCLUSION Cases of probable titanium allergy included those with true titanium allergies and those with a potentially different cause. However, the differentiation of these cases is difficult. Since no definitive method has been established for diagnosing titanium allergy, a comprehensive diagnosis based on the clinical course and clinical examination using a patch test/LTT/MELISA is necessary. Implant treatment should be performed with caution in patients with any preoperative allergies.
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Affiliation(s)
- Megumi Watanabe
- Department of Prosthodontics & Oral Rehabilitation, Tokushima University, Graduate School of Biomedical Sciences, 3-18-15, Kuramoto, Tokushima 770-8504, Japan; (L.L.); (T.I.)
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15
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Chen M, Ren M, Shi Y, Liu X, Wei H. State-of-the-art polyetheretherketone three-dimensional printing and multifunctional modification for dental implants. Front Bioeng Biotechnol 2023; 11:1271629. [PMID: 37929192 PMCID: PMC10621213 DOI: 10.3389/fbioe.2023.1271629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/05/2023] [Indexed: 11/07/2023] Open
Abstract
Polyetheretherketone (PEEK) is a high-performance thermoplastic polymer with an elastic modulus close to that of the jawbone. PEEK has the potential to become a new dental implant material for special patients due to its radiolucency, chemical stability, color similarity to teeth, and low allergy rate. However, the aromatic main chain and lack of surface charge and chemical functional groups make PEEK hydrophobic and biologically inert, which hinders subsequent protein adsorption and osteoblast adhesion and differentiation. This will be detrimental to the deposition and mineralization of apatite on the surface of PEEK and limit its clinical application. Researchers have explored different modification methods to effectively improve the biomechanical, antibacterial, immunomodulatory, angiogenic, antioxidative, osteogenic and anti-osteoclastogenic, and soft tissue adhesion properties. This review comprehensively summarizes the latest research progress in material property advantages, three-dimensional printing synthesis, and functional modification of PEEK in the fields of implant dentistry and provides solutions for existing difficulties. We confirm the broad prospects of PEEK as a dental implant material to promote the clinical conversion of PEEK-based dental implants.
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Affiliation(s)
- Meiqing Chen
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Mei Ren
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yingqi Shi
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xiuyu Liu
- Hospital of Stomatogy, Jilin University, Changchun, China
| | - Hongtao Wei
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
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16
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Kowalski J, Rylska D, Januszewicz B, Konieczny B, Cichomski M, Matinlinna JP, Radwanski M, Sokolowski J, Lukomska-Szymanska M. Corrosion Resistance of Titanium Dental Implant Abutments: Comparative Analysis and Surface Characterization. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6624. [PMID: 37895605 PMCID: PMC10608008 DOI: 10.3390/ma16206624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/02/2023] [Accepted: 10/08/2023] [Indexed: 10/29/2023]
Abstract
Metals subjected to the oral environment are prone to corrosion over time and this can be harmful. Metallic restoration components such as dental subgingival implant abutments are exposed to pH changes and different ions while in contact with saliva. The aim of the study was to evaluate the corrosion resistance of titanium dental implant abutments and to compare and contrast the surface characteristics of these alloys before and after corrosion. The corrosion examination (Ecorr, jcorr, OCP, polarization curve) of two implant abutments (TiDesign EV, Astra Tech, Dentsply, York, PA, USA; Individual Titanium Abutment, Apollo Implants Components, Pabianice, Poland) was performed in 0.9% NaCl and 5% HCl. Moreover, specimens were investigated using SEM-EDS before and after the corrosion test. The value of jcorr in NaCl was higher for Astra (34.2 × 10-8 ± 2.5 × 10-8 A/cm2) than for Apollo (8.8 × 10-8 ± 2.5 × 10-8 A/cm2). Whereas, in HCl, the opposite relationship was observed (Astra 2.9 × 10-4 ± 0.8 × 10-4 A/cm2 and Apollo 62.7 × 10-4 ± 9.3 × 10-4 A/cm2). An average reactive anodic current density in NaCl for Astra amounted up to ~0.2 × 10-5-1.5 × 10-5 A/cm2, while for Apollo-up to ~3.3-9.7 × 10-7 A/cm2. The composition of both alloys after corrosion in NaCl demonstrated some changes: a decrease in the Ti, and Al and an increase in oxygen content. Hence, both alloys after corrosion in HCl demonstrated some minor changes in the elemental composition. Based on the results it can be concluded that: 1. Astra and Apollo abutments revealed good corrosion resistance and a passivation layer on the surface. 2. Apollo abutments exhibited better corrosion resistance in a neutral environment, suggesting that Astra abutments were found to be more resistant to corrosion in an acidic medium.
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Affiliation(s)
- Jakub Kowalski
- Department of General Dentistry, Medical University of Lodz, 92-213 Lodz, Poland
| | - Dorota Rylska
- Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-924 Lodz, Poland; (D.R.); (B.J.)
| | - Bartłomiej Januszewicz
- Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-924 Lodz, Poland; (D.R.); (B.J.)
| | - Bartlomiej Konieczny
- University Laboratory of Materials Research, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland;
| | - Michal Cichomski
- Department of Material Technology and Chemistry, Faculty of Chemistry, University of Lodz, 163 Pomorska St., 90-236 Lodz, Poland;
| | - Jukka P. Matinlinna
- Biomaterials Science, Division of Dentistry, The University of Manchester, Manchester M13 9PL, UK;
| | - Mateusz Radwanski
- Department of Endodontics, Medical University of Lodz, 92-213 Lodz, Poland;
| | - Jerzy Sokolowski
- Department of General Dentistry, Medical University of Lodz, 92-213 Lodz, Poland
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Devadoss D, Asirvatham A, Kujur A, Saaron G, Devi N, John Mary S. Green synthesis of copper oxide nanoparticles from Murraya koenigii and its corrosion resistivity on Ti-6Al-4V dental alloy. J Mech Behav Biomed Mater 2023; 146:106080. [PMID: 37643540 DOI: 10.1016/j.jmbbm.2023.106080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/15/2023] [Accepted: 08/20/2023] [Indexed: 08/31/2023]
Abstract
The present work describes green-mediated copper oxide nanoparticles as a potential corrosion inhibitor for the dental alloy Ti-6Al-4V. The salt of copper was reduced to metal nanoparticles using Murraya koenigii leaves, which helps with the agglomeration and nanocluster formation through a reduction mechanism. The current synthesis is a single-step process and is cost-effective. The synthesized nanoparticle was characterized using UV, FTIR, XRD, Zeta potential and Particle size analyzer, SEM, and EDX. The particles were then electrodeposited on Ti-6Al-4V alloy, and the corrosion resistivity in the dental medium was analyzed using Electrochemical parameters such as Corrosion current, Corrosion potential, and anodic and cathodic intercepts through the Tafel and Nyquist plots. The synthesized nanoparticles showed characteristic absorbance at 359 nm. FTIR peaks confirm the phytochemical constituents present in the Murraya koenigii that accounts for the formation of nanoparticles. The XRD predicts the crystalline nature, which is further studied using SEM and EDX. The Zeta potential and Particle size analyzer confirms the negative-negative interactive nature of the synthesized CuO NPs. The NPs showed explicit corrosion inhibition properties with an overall inhibition efficiency of 58.15% and 25.6%, respectively. The study confirms the advantage of using Copper Oxide nanoparticles as a potential coating agent in dental implant alloys in increasing its corrosion efficiency.
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Affiliation(s)
- Delinta Devadoss
- Department of Chemistry, Loyola College, Chennai, 600 034, India; Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India.
| | - Ajila Asirvatham
- Department of Chemistry, Loyola College, Chennai, 600 034, India; Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India.
| | - Ashok Kujur
- Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India; Creighton University, School of Medicine, 2500 California Plaza, Omaha, 68178, Nebraska, USA.
| | - Geo Saaron
- Department of Chemistry, Loyola College, Chennai, 600 034, India; Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India.
| | - Nirmala Devi
- Department of Chemistry, Loyola College, Chennai, 600 034, India; Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India.
| | - S John Mary
- Department of Chemistry, Loyola College, Chennai, 600 034, India; Loyola Institute of Frontier Energy, Loyola College, Chennai, 600 034, India.
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Schnurr E, Volz KU, Mosetter K, Ghanaati S, Hueber R, Preussler C. Interaction of Telomere Length and Inflammatory Biomarkers Following Zirconia Implant Placement: A Case Series. J ORAL IMPLANTOL 2023; 49:524-531. [PMID: 38349660 DOI: 10.1563/aaid-joi-d-22-00236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
Zirconia implants have gained popularity for their aesthetic appeal and biocompatibility, making them a preferred choice for anterior teeth replacement. This study explores the interaction between telomere length and inflammatory biomarkers in seven cases of zirconia implant placement to gain insights into postoperative cellular aging, inflammatory responses, and long-term outcomes. Zirconia implants offer advantages over titanium implants, as they do not corrode or release metal ions, leading to potential inflammation and implant failure. Monitoring immune and inflammatory biomarkers is essential to assess inflammation initiation, severity, and progression. C-reactive protein (CRP) and pro-inflammatory cytokines, like interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), play crucial roles in host immune responses, while anti-inflammatory cytokines, including interleukin-10 (IL-10), regulate and dampen immune responses. Achieving a delicate balance between pro- and anti-inflammatory cytokines is vital for maintaining a healthy immune response and preventing chronic inflammatory conditions. Telomeres, protective structures present at chromosome ends, influence cellular aging and mitochondrial function. Shorter telomeres are associated with impaired mitochondrial function, increased oxidative stress, and cellular senescence, while longer telomeres are linked to reduced inflammation and improved immune function. Understanding these mechanisms is essential for addressing age-related conditions and promoting overall well-being. In this case series, we investigated the interaction between telomere length and inflammatory biomarkers in patients who received zirconia dental implants. The study aims to improve our understanding of postoperative cellular aging, inflammatory responses, and the biocompatibility of zirconia implants, potentially leading to improved treatment protocols and patient outcomes. This innovative assessment of telomere length and inflammatory biomarkers in the context of zirconia implants provides novel insights into the field of dental implantology. By exploring the effects of zirconia implants on cellular health and inflammation, this study contributes to advancements in implant technology and patient care.
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Affiliation(s)
| | | | - Kurt Mosetter
- SDS: Swiss Dental Solutions, Kreuzlingen, Switzerland
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19
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Wang Y, Ulbricht A, Schmidt F, Müller BR, Kupsch A, Schwitalla AD. Micro-CT analysis and mechanical properties of low dimensional CFR-PEEK specimens additively manufactured by material extrusion. J Mech Behav Biomed Mater 2023; 146:106085. [PMID: 37625280 DOI: 10.1016/j.jmbbm.2023.106085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/17/2023] [Accepted: 08/20/2023] [Indexed: 08/27/2023]
Abstract
Material extrusion of thermoplastic polymers enables the realization of complex specific designs with high performance composites. The present study aims at evaluating the mechanical properties of carbon fiber-reinforced semi-crystalline thermoplastic polymer polyether ether ketone (CFR-PEEK) manufactured by material extrusion and correlating them with results obtained by micro-CT. Samples in the shape of small bars were provided by Kumovis (Munich, Germany). The determination of surface roughness and density was followed by three-point bending tests. To reveal the pore distribution as well as the fusion quality of CFR PEEK when applied with external forces, micro-CT scans were performed with an X-ray microscope before and after the mechanical test to localize the sites where the fracture is generated. The density of CFR-PEEK bars indicated that they had superior mechanical properties compared with our previous study on unfilled 3D printed PEEK (bending modulus: (5.4 ± 0.5) GPa vs. (1.05 ± 0.05) GPa to (1.48 ± 0.10) GPa; bending strength: (167 ± 11) MPa vs. (51 ± 15) to (193 ± 7) MPa). Micro-CT analyses revealed the local 3D-distribution of voids. Voids of 30 μm diameter are nearly spherical and make up the main part of the total porosity. The larger the voids, the more they deviate from a spherical shape. Significant lack-of-fusion voids are located between the deposited filaments. By growing and merging, they act as seeds for the forming fracture line in the region of the flexural specimens where the maximum local tensile stresses occurred under bending load. Our work provides a detailed analysis of printed PEEK with fiber additive and relates this with mechanical properties.
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Affiliation(s)
- Yiqiao Wang
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany; Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510056, China
| | - Alexander Ulbricht
- Bundesanstalt für Materialforschung und -prüfung, Berlin, 12205, Germany
| | - Franziska Schmidt
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Bernd R Müller
- Bundesanstalt für Materialforschung und -prüfung, Berlin, 12205, Germany
| | - Andreas Kupsch
- Bundesanstalt für Materialforschung und -prüfung, Berlin, 12205, Germany
| | - Andreas Dominik Schwitalla
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany.
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20
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El Shafei SF, Raafat SN, Farag EA. Enhanced human periodontal ligament stem cell viability and osteogenic differentiation on two implant materials: An experimental in vitro study. F1000Res 2023; 12:447. [PMID: 37614561 PMCID: PMC10442589 DOI: 10.12688/f1000research.129562.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/04/2023] [Indexed: 08/25/2023] Open
Abstract
Background: Surface roughness of dental implants impacts the survival of adult periodontal stem cells and rate of differentiation. This research was conducted to test how human periodontal ligament stem cells behaved on yttria stabilized tetragonal zirconia polycrystals and polyetheretherketone (PEEK) discs with different surface topographies. Methods: Discs roughening was prepared by sandblasting. Stem cells were cultivated on zirconia discs with a polished surface, PEEK discs with a polished surface, sandblasted zirconia discs and sandblasted PEEK discs. Cells viability was assessed after 24, 48, 72 hours. Scanning electron microscopy was used to examine the adherence and attachment of cells. Osteoblastic differentiation capacity was studied by checking the mineralization clusters development through alizarin red S staining and alkaline phosphatase assay. ANOVA and the Tukey post hoc test were used for the statistical analysis. Results: Polished PEEK discs showed lower cell viability, whereas roughened sandblasted zirconia and PEEK discs showed the highest proliferation rates and cell viability percent. The osteogenic differentiation was enhanced for rough surfaces in comparison to polished surfaces. Sandblasted zirconia and PEEK discs showed a markedly increased mineralized nodule development and ALP enzyme activity compared to the polished surface and control. Conclusions: Micro- topographies creation on the PEEK implant surface enhances stem cell attachment, viability, and osteogenic differentiation.
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Affiliation(s)
- Sara F. El Shafei
- Removable Prosthodontics, Faculty of Dentistry, The British University in Egypt, Cairo, Egypt
| | - Shereen N. Raafat
- Department of Pharmacology, Director of Stem Cell and Tissue Culture Hub, Centre of Innovative Dental Sciences (CIDS), Faculty of Dentistry,, The British University in Egypt, Cairo, Egypt
| | - Engy A. Farag
- Fixed Prosthodontics, Faculty of Dentistry, The British University in Egypt, Cairo, Egypt
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Cionca N, Meyer J, Michalet S, Varesio E, Hashim D. Quantification of titanium and zirconium elements in oral mucosa around healthy dental implants: a case-control pilot study. Clin Oral Investig 2023; 27:4715-4726. [PMID: 37270723 PMCID: PMC10415439 DOI: 10.1007/s00784-023-05099-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 05/29/2023] [Indexed: 06/05/2023]
Abstract
OBJECTIVES Metallic particles are detected in different sites of the oral cavity, mainly in patients with peri-implantitis lesions. The aim of this pilot study was to analyze the levels of titanium and zirconium elements in the oral mucosa around healthy implants and to investigate the impact of titanium exogenous contamination on the measurements. MATERIALS AND METHODS Forty-one participants were included in this three-phase study. Two groups of subjects were defined according to presence of titanium or zirconia implants (n: 20) or without any implants nor metallic restorations (n:21). Thirteen patients (n: 5 with zirconia implant; n: 3 with titanium implants; n: 5 control group) took part to the first part designed to optimize and validate the method of detecting titanium (Ti) and zirconium (Zr) elements in the oral mucosa and gingival tissues by the Inductively Coupled Plasma Mass Spectrometry (ICPMS). The second phase compared the levels of Ti and Zr concentrations in patients with implants (n: 12) and without implants (n: 6) who were controlled for their intake of titanium dioxide (TiO2). The last step included ten control subjects without any metallic devices to measure the concentration of Ti and Zr before and after having candies containing TiO2. RESULTS In the first phase, concentrations of Ti and Zr were below the limit of detection (LOD) in most cases, 0.18 μg/L and 0.07 μg/L respectively. In the titanium group, two out of three subjects displayed concentrations above the LOD, 0.21 μg/L and 0.66 μg/L. Zr element was only found in patients with zirconia implants. After controlling the intake of TiO2, all concentrations of Ti and Zr were below the limit of quantification (LOQ). Moreover, in patients with no implants, the Ti concentration in gingiva cells was superior for 75% of the samples after having a TiO2 diet. CONCLUSIONS Zirconium was only found in patients with zirconia implants, whereas titanium was detected in all groups even in subjects with no titanium implants. Zirconium and titanium elements were not detected in patients who were controlled for their intake of food and their use of toothpaste irrespective of the presence of implants or not. For 70% of the patients, the titanium detection was directly influenced by the intake of TiO2 contained candies. CLINICAL RELEVANCE When analyzing titanium particles, it is necessary to pay attention to the risk of contamination bias brought by external products. When this parameter was controlled, no titanium particles were detected around clinically healthy implants.
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Affiliation(s)
- Norbert Cionca
- Division of Regenerative Dental Medicine and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Julien Meyer
- Mass Spectrometry Core Facility (MZ 2.0), Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Sophie Michalet
- Mass Spectrometry Core Facility (MZ 2.0), Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Emmanuel Varesio
- Mass Spectrometry Core Facility (MZ 2.0), Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Dena Hashim
- Division of Regenerative Dental Medicine and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
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22
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Poli PP, Manfredini M, Oliva N, Bettini S, Damiani G, Goldoni R, Strambini L, Casati S, Del Fabbro M, Tartaglia GM. Detection and sensing of oral xenobiotics in edentulous patients rehabilitated with titanium dental implants: Insights from a scoping review. J Prosthet Dent 2023:S0022-3913(23)00342-6. [PMID: 37423787 DOI: 10.1016/j.prosdent.2023.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 05/16/2023] [Accepted: 05/16/2023] [Indexed: 07/11/2023]
Abstract
STATEMENT OF PROBLEM Titanium has been considered the standard element in implant manufacturing. Recent studies have evaluated the role of titanium as a biological modulator of oral health. However, evidence regarding the association between the release of metal particles and peri-implantitis is lacking. PURPOSE The purpose of this scoping review was to evaluate the literature regarding the release of metal particles in peri-implant tissues correlated with the methods of detection and the local and systemic implications. MATERIAL AND METHODS The study was performed in adherence with the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines and was registered with the National Institute for Health Research PROSPERO (Submission No. 275576; ID: CRD42021275576). A systematic search was conducted in the Cochrane Central Register of Controlled Trials, EMBASE, MEDLINE via PubMed, Scopus, and Web of Science bibliographic databases, complemented by a manual evaluation. Only in vivo human studies written in the English language and published between January 2000 and June 2022 were included. RESULTS In total, 10 studies were included according to eligibility criteria. Different tissues and analytic techniques were reported: the characterization technique most used was inductively coupled plasma mass spectrometry. All 10 studies analyzed the release of metal particles in patients with dental implants, continuously detecting titanium. None of the studies reported a significant association between metal particles and biological effects. CONCLUSIONS Titanium is still considered the material of choice in implant dentistry, despite the detection of metal particles in peri-implant tissues. Further studies are necessary to evaluate the association between analytes and local health or inflammatory status.
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Affiliation(s)
- Pier Paolo Poli
- Research Fellow, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; Research Fellow, Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Mattia Manfredini
- PhD Student, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; PhD Student, Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
| | - Nadim Oliva
- Resident, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - Sofia Bettini
- Resident, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; Resident, Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giovanni Damiani
- Assistant Professor, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; Assistant Professor, Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy; Assistant Professor, Division of Clinical Dermatology, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Riccardo Goldoni
- PhD Student, Department of Electronics, Information and Bioengineering (DEIB), Politecnico Di Milano, Milan, Italy; PhD Student, National Research Council, Department of Electronics, Information and Bioengineering (DEIB), Politecnico di Milano, Milan, Italy
| | - Lucanos Strambini
- Research Fellow, National Research Council, Department of Electronics, Computer and Telecommunication Engineering (CNR-IEIIT), Milan, Italy
| | - Sara Casati
- Research Fellow, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - Massimo Del Fabbro
- Associate Professor, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; Associate Professor, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Gianluca M Tartaglia
- Associate Professor, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy; Associate Professor, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy
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23
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Stolzer C, Müller M, Gosau M, Henningsen A, Fuest S, Aavani F, Smeets R. Do Titanium Dioxide Particles Stimulate Macrophages to Release Proinflammatory Cytokines and Increase the Risk for Peri-implantitis? J Oral Maxillofac Surg 2023; 81:308-317. [PMID: 36442535 DOI: 10.1016/j.joms.2022.10.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 10/09/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022]
Abstract
PURPOSE Titanium dioxide (TiO2) particles detached from titanium dental implants by tribocorrosion can be phagocytosed by macrophages, releasing various proinflammatory cytokines at the implant sites that may trigger peri-implantitis. The study objective was to measure the association between peri-implantitis and the presence of non-allergy-related proinflammatory cytokines associated with TiO2 particles. METHODS The investigators implemented a retrospective cross-sectional study and enrolled a sample of 60 subjects from a dental practice. Subjects were excluded if the plaque index was grade 3 (Silness and Löe). The predictor variable was a positive or negative TiO2 stimulation test, an in vitro macrophage proinflammatory response test. The outcome variable was peri-implantitis status defined as present or absent. Three groups were considered: control group with 20 patients without dental implants (group 1), 2 groups of patients with titanium dental implants, one without peri-implantitis (group 2), and the other with peri-implantitis (group 3) (n = 20 each). For patients with implants, depth of the gingival pockets of the implants were measured, and existing bleeding and suppuration were determined to assess peri-implantitis. Radiographs were taken if one or more factors applied to confirm the diagnosis of peri-implantitis. Further covariates were age, sex, duration of implant wear, and number of implants which were analyzed descriptively. Inferential analyses were undertaken using χ2 test, Kruskal-Wallis-, Wilcoxon-two-sample tests, and logistic regressions. RESULTS The sample was composed of 35 female and 25 male patients with a mean age of 54.2 years (standard deviation = 14.76). The overall TiO2 stimulation test positivity frequency was 28.3% and were 30.0%, 5.0%, and 50.0% in the control, implants without peri-implantitis, and implants with peri-implantitis groups. No statistically significant differences could be seen in the frequencies of the TiO2 stimulation test results between control group and combined groups 2 and 3 (P-value = .84). The risk for positive TiO2 patients with a titanium implant of developing peri-implantitis was statistically significant and higher compared to negative TiO2 patients (odds ratio, 19.0 with 95% confidence interval [2.12,170.38]; P-value< .01). CONCLUSIONS The data in this study showed a statistically significant relationship between a positive TiO2 stimulation test and peri-implantitis. Further studies with larger numbers of subjects are recommended to confirm this result.
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Affiliation(s)
- Carolin Stolzer
- Consultant, Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Martin Gosau
- Professor, Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anders Henningsen
- Assistant Professor, Consultant, Division of Regenerative Orofacial Medicine, Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Sandra Fuest
- Research Assistant, Division of Regenerative Orofacial Medicine, Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Farzaneh Aavani
- Research Assistant, Division of Regenerative Orofacial Medicine, Department of Oral and Maxillofacial Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Ralf Smeets
- Professor, Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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24
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Dadkhahfar S, Chehrassan M, Faldini C. Hypersensitivity reactions to metals in spine surgery. Musculoskelet Surg 2023; 107:29-35. [PMID: 36344900 DOI: 10.1007/s12306-022-00765-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 10/05/2022] [Indexed: 11/09/2022]
Abstract
Hypersensitivity to orthopedic devices is a rare condition with an underestimated incidence due to the lack of diagnostic guideline and ambiguous clinical manifestations. Although hypersensitivity to metal is common, a few cases of hypersensitivity reactions have been reported after spinal instrumentation. Spinal fusion and stabilization require a wide range of devices such as screws, wires, bands, and artificial disk replacement devices. Spinal instrumented surgeries are different from total joint arthroplasty in several aspects such as degree and pattern of motion, loading environment, and adjacent tissues with distinct characteristics. The interval for hypersensitivity reactions to occur after spinal metallic implantation is usually weeks to months. The present review covers the topic of hypersensitivity reactions that have been reported after spinal surgeries with the focus on cutaneous presentations.
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Affiliation(s)
- S Dadkhahfar
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Chehrassan
- Bone and Joint Reconstruction Research Center, Shafa Orthopedic Hospital, Iran University of Medical Sciences, Tehran, Iran.
| | - C Faldini
- Istituto Orthopedico Rizzoli, Bologna, Italy
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25
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Mizukoshi K, Okazawa Y, Amemiya K, Tsuchiya Y, Motegi S, Tsukamoto R, Honjo K, Takahashi R, Yoshihara N, Kawano S, Kawai M, Munakata S, Ishiyama S, Sugimoto K, Takahashi M, Kojima Y, Ikeda S, Sakamoto K. Examination of colorectal cancer cases with metal allergy. Surg Today 2023:10.1007/s00595-023-02643-7. [PMID: 36757618 DOI: 10.1007/s00595-023-02643-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 09/30/2022] [Indexed: 02/10/2023]
Abstract
PURPOSE To report our initiatives and treatment results for patients with colorectal cancer with metal allergy. METHODS A total of 27 patients (2.6%) with a history of metal contact dermatitis were identified among 1027 patients who underwent curative resection of colorectal cancer from 2014 to 2020. The results of the patch test, perioperative results, and postoperative colonoscopy findings were also investigated. RESULTS The patch test for metal allergens and staples was performed in 21 patients (77.8%), and 13 of them (61.9%) tested positive for at least one metal allergen. Ni (38.1%), Co (28.6%), and Pd (19.0%) showed higher positive rates than other metals, and 1 patient (4.8%) tested positive for staples. Stapled anastomosis/suturing was performed as planned in 15 of 27 patients. In 10 patients, the anastomosis method was changed from stapled to hand-sewn according to the no-patch test results (60%), positivity for multiple metals (20%), positivity for staples (10%), and surgeon's judgment (10%). No complications and abnormal colonoscopy findings were found to be associated with stapled anastomosis/suturing. CONCLUSION The patch test is useful for selecting an optimal anastomosis method for patients with suspected metal allergy.
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Affiliation(s)
- Kosuke Mizukoshi
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan. .,Department of Surgery, Kuwana City Medical Center, 3-11 Kotobuki-cho, Kuwana-shi, Mie, 511-0061, Japan.
| | - Yu Okazawa
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kota Amemiya
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Yuki Tsuchiya
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shunsuke Motegi
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Ryoichi Tsukamoto
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kumpei Honjo
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Rina Takahashi
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Nagisa Yoshihara
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shingo Kawano
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Masaya Kawai
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shinya Munakata
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shun Ishiyama
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kiichi Sugimoto
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Makoto Takahashi
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Yutaka Kojima
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shigaku Ikeda
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kazuhiro Sakamoto
- Department of Coloproctological Surgery, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
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Labis V, Bazikyan E, Demin D, Dyachkova I, Zolotov D, Volkov A, Asadchikov V, Zhigalina O, Khmelenin D, Kuptsova D, Petrichuk S, Semikina E, Sizova S, Oleinikov V, Khaidukov S, Kozlov I. Cell-Molecular Interactions of Nano- and Microparticles in Dental Implantology. Int J Mol Sci 2023; 24:ijms24032267. [PMID: 36768589 PMCID: PMC9916569 DOI: 10.3390/ijms24032267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/04/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
The role of metallic nano- and microparticles in the development of inflammation has not yet been investigated. Soft tissue biopsy specimens of the bone bed taken during surgical revisions, as well as supernatants obtained from the surface of the orthopedic structures and dental implants (control), were examined. Investigations were performed using X-ray microtomography, X-ray fluorescence analysis, and scanning electron microscopy. Histological studies of the bone bed tissues were performed. Nanoscale and microscale metallic particles were identified as participants in the inflammatory process in tissues. Supernatants containing nanoscale particles were obtained from the surfaces of 20 units of new dental implants. Early and late apoptosis and necrosis of immunocompetent cells after co-culture and induction by lipopolysaccharide and human venous blood serum were studied in an experiment with staging on the THP-1 (human monocytic) cell line using visualizing cytometry. As a result, it was found that nano- and microparticles emitted from the surface of the oxide layer of medical devices impregnated soft tissue biopsy specimens. By using different methods to analyze the cell-molecule interactions of nano- and microparticles both from a clinical perspective and an experimental research perspective, the possibility of forming a chronic immunopathological endogenous inflammatory process with an autoimmune component in the tissues was revealed.
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Affiliation(s)
- Varvara Labis
- Stomatology Faculty, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Ernest Bazikyan
- Stomatology Faculty, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Denis Demin
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Irina Dyachkova
- Federal Scientific Research Centre “Crystallography and Photonics” Russian Academy of Sciences, 119333 Moscow, Russia
- Correspondence:
| | - Denis Zolotov
- Federal Scientific Research Centre “Crystallography and Photonics” Russian Academy of Sciences, 119333 Moscow, Russia
| | - Alexey Volkov
- Federal State Budgetary Institution “National Medical Research Center for Traumatology and Orthopedics Named after N.N. Priorov” of the Ministry of Health of the Russian Federation, 127299 Moscow, Russia
- Department of Pathological Anatomy, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Victor Asadchikov
- Federal Scientific Research Centre “Crystallography and Photonics” Russian Academy of Sciences, 119333 Moscow, Russia
| | - Olga Zhigalina
- Federal Scientific Research Centre “Crystallography and Photonics” Russian Academy of Sciences, 119333 Moscow, Russia
- Department of Machine-Building Technologies, Bauman Moscow State Technical University, 105005 Moscow, Russia
| | - Dmitry Khmelenin
- Federal Scientific Research Centre “Crystallography and Photonics” Russian Academy of Sciences, 119333 Moscow, Russia
| | - Daria Kuptsova
- Federal State Autonomous Institution “National Medical Research Center for Children’s Health”, Ministry of Health of the Russian Federation, 119991 Moscow, Russia
| | - Svetlana Petrichuk
- Federal State Autonomous Institution “National Medical Research Center for Children’s Health”, Ministry of Health of the Russian Federation, 119991 Moscow, Russia
| | - Elena Semikina
- Federal State Autonomous Institution “National Medical Research Center for Children’s Health”, Ministry of Health of the Russian Federation, 119991 Moscow, Russia
| | - Svetlana Sizova
- Department of Biomaterials and Bionanotechnology, Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia
| | - Vladimir Oleinikov
- Department of Biomaterials and Bionanotechnology, Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia
| | - Sergey Khaidukov
- Department of Biomaterials and Bionanotechnology, Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997 Moscow, Russia
| | - Ivan Kozlov
- Institute of Professional Education, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
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Kohal RJ, Vach K, Butz F, Spies BC, Patzelt SBM, Burkhardt F. One-Piece Zirconia Oral Implants for the Support of Three-Unit Fixed Dental Prostheses: Three-Year Results from a Prospective Case Series. J Funct Biomater 2023; 14:jfb14010045. [PMID: 36662092 PMCID: PMC9864364 DOI: 10.3390/jfb14010045] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023] Open
Abstract
The objective was to investigate the clinical and radiological outcome of one-piece zirconia oral implants to support three-unit fixed dental prostheses (FDP) after three years in function. Twenty-seven patients were treated with a total of 54 implants in a one-stage surgery and immediate provisionalization. Standardized radiographs were taken at implant placement, after one year and after three years, to evaluate peri-implant bone loss. Soft-tissue parameters were also assessed. Linear mixed regression models as well as Wilcoxon Signed Rank tests were used for analyzing differences between groups and time points (p < 0.05). At the three-year evaluation, one implant was lost, resulting in a cumulative survival rate of 98.1%. The mean marginal bone loss amounted to 2.16 mm. An implant success grade I of 52% (bone loss of ≤2 mm) and success grade II of 61% (bone loss of ≤3 mm) were achieved. None of the evaluated baseline parameters affected bone loss. The survival rate of the zirconia implants was comparable to market-available titanium implants. However, an increased marginal bone loss was observed with a high peri-implantitis incidence and a resulting low implant success rate.
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Affiliation(s)
- Ralf-Joachim Kohal
- Department of Prosthetic Dentistry, Faculty of Medicine, Center for Dental Medicine, Medical Center-University of Freiburg, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
- Correspondence:
| | - Kirstin Vach
- Institute of Medical Biometry and Statistics, Faculty of Medicine, Medical Center-University of Freiburg, University of Freiburg, Zinkmattenstr. 6a, 79108 Freiburg, Germany
| | - Frank Butz
- Department of Prosthetic Dentistry, Faculty of Medicine, Center for Dental Medicine, Medical Center-University of Freiburg, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
- Private Dental Clinic, Belchenstr. 6a, 79189 Bad Krozingen, Germany
| | - Benedikt Christopher Spies
- Department of Prosthetic Dentistry, Faculty of Medicine, Center for Dental Medicine, Medical Center-University of Freiburg, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Sebastian Berthold Maximilian Patzelt
- Department of Prosthetic Dentistry, Faculty of Medicine, Center for Dental Medicine, Medical Center-University of Freiburg, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
- Private Dental Clinic, Am Dorfplatz 3, 78658 Zimmern ob Rottweil, Germany
| | - Felix Burkhardt
- Department of Prosthetic Dentistry, Faculty of Medicine, Center for Dental Medicine, Medical Center-University of Freiburg, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
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Saha S, Roy S. Metallic Dental Implants Wear Mechanisms, Materials, and Manufacturing Processes: A Literature Review. MATERIALS (BASEL, SWITZERLAND) 2022; 16:ma16010161. [PMID: 36614500 PMCID: PMC9821388 DOI: 10.3390/ma16010161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 11/29/2022] [Accepted: 12/13/2022] [Indexed: 06/12/2023]
Abstract
OBJECTIVES From the treatment of damaged teeth to replacing missing teeth, dental biomaterials cover the scientific interest of many fields. Dental biomaterials are one of the implants whose effective life depends vastly on their material and manufacturing techniques. The purpose of this review is to summarize the important aspects for metallic dental implants from biomedical, mechanical and materials science perspectives. The review article will focus on five major aspects as mentioned below. Tooth anatomy: Maximizing the implant performance depends on proper understanding of human tooth anatomy and the failure behavior of the implants. Major parts from tooth anatomy including saliva characteristics are explored in this section. Wear mechanisms: The prominent wear mechanisms having a high impact on dental wear are abrasive, adhesive, fatigue and corrosion wear. To imitate the physiological working condition of dental implants, reports on the broad range of mastication force and various composition of artificial saliva have been included in this section, which can affect the tribo-corrosion behavior of dental implants. Dental implants classifications: The review paper includes a dedicated discussion on major dental implants types and their details for better understanding their applicability and characteristics. Implant materials: As of today, the most established dental implant materials are SS316L, cobalt chrome alloy and titanium. Detailed discussion on their material properties, microstructures, phase transformations and chemical compositions have been discussed here. Manufacturing techniques: In terms of different production methods, the lost wax casting method as traditional manufacturing is considered. Selective Laser Melting (SLM) and Directed Energy Deposition (DED) as additive manufacturing techniques (AM) have been discussed. For AM, the relationships between process-property-performance details have been explored briefly. The effectiveness of different manufacturing techniques was compared based on porosity distribution, mechanical and biomechanical properties. SUMMARY Despite having substantial research available on dental implants, there is a lack of systematic reviews to present a holistic viewpoint combining state-of-the-art from biomedical, mechanical, materials science and manufacturing perspectives. This review article attempts to combine a wide variety of analyzing approaches from those interdisciplinary fields to deliver deeper insights to researchers both in academia and industry to develop next-generation dental implants.
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Effect of Heat Treatment on Elastic Properties and Fracture Toughness of Fused Filament Fabricated PEEK for Biomedical Applications. Polymers (Basel) 2022; 14:polym14245521. [PMID: 36559887 PMCID: PMC9785160 DOI: 10.3390/polym14245521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/04/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
This work presents the results of an experimental investigation of the mechanical properties of polyetheretherketone (PEEK) specimens additively manufactured (AM) by using fused filament fabrication with different printing parameters and subjected to postprocessing heat treatment. Standard and compact tension samples were manufactured with a different infill angle using 0.4 mm and 0.6 mm nozzle diameters. Some of the samples were subjected to heat treatment at 220 °C after manufacturing. Tensile tests were conducted to determine the values of elastic modulus, tensile strength, as well as mode-I fracture toughness and critical strain energy release rate. Tensile properties of single-thread and as-delivered filaments were also studied. It was concluded that heat treatment significantly improved the elastic properties, tensile strength and fracture toughness of the AM PEEK samples: the fracture resistance increased by 33 to 45% depending on the stacking order, while the tensile strength increased by some 45-65%, with the elasticity modulus grown by up to 20%. Strain fields induced in specimens by crack propagation were captured with a digital image correlation technique and compared with results of numerical simulations implemented with the extended finite-element method (XFEM). Conclusions on the optimal parameters of 3D printing of PEEK were made.
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Akshaya S, Rowlo PK, Dukle A, Nathanael AJ. Antibacterial Coatings for Titanium Implants: Recent Trends and Future Perspectives. Antibiotics (Basel) 2022; 11:antibiotics11121719. [PMID: 36551376 PMCID: PMC9774638 DOI: 10.3390/antibiotics11121719] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
Titanium and its alloys are widely used as implant materials for biomedical devices owing to their high mechanical strength, biocompatibility, and corrosion resistance. However, there is a significant rise in implant-associated infections (IAIs) leading to revision surgeries, which are more complicated than the original replacement surgery. To reduce the risk of infections, numerous antibacterial agents, e.g., bioactive compounds, metal ions, nanoparticles, antimicrobial peptides, polymers, etc., have been incorporated on the surface of the titanium implant. Various coating methods and surface modification techniques, e.g., micro-arc oxidation (MAO), layer-by-layer (LbL) assembly, plasma electrolytic oxidation (PEO), anodization, magnetron sputtering, and spin coating, are exploited in the race to create a biocompatible, antibacterial titanium implant surface that can simultaneously promote tissue integration around the implant. The nature and surface morphology of implant coatings play an important role in bacterial inhibition and drug delivery. Surface modification of titanium implants with nanostructured materials, such as titanium nanotubes, enhances bone regeneration. Antimicrobial peptides loaded with antibiotics help to achieve sustained drug release and reduce the risk of antibiotic resistance. Additive manufacturing of patient-specific porous titanium implants will have a clear future direction in the development of antimicrobial titanium implants. In this review, a brief overview of the different types of coatings that are used to prevent implant-associated infections and the applications of 3D printing in the development of antibacterial titanium implants is presented.
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Affiliation(s)
- S. Akshaya
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
- School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India
| | - Praveen Kumar Rowlo
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
- School of Bio Sciences & Technology, Vellore Institute of Technology, Vellore 632014, India
| | - Amey Dukle
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
- School of Bio Sciences & Technology, Vellore Institute of Technology, Vellore 632014, India
| | - A. Joseph Nathanael
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore 632014, India
- Correspondence:
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Müller-Heupt LK, Schiegnitz E, Kaya S, Jacobi-Gresser E, Kämmerer PW, Al-Nawas B. The German S3 guideline on titanium hypersensitivity in implant dentistry: consensus statements and recommendations. Int J Implant Dent 2022; 8:51. [PMID: 36329297 PMCID: PMC9633908 DOI: 10.1186/s40729-022-00451-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND There is currently a lack of guidelines for clinicians regarding titanium hypersensitivity in implant dentistry. Diagnostic tests such as the epicutaneous test or the lymphocyte transformation test showed inconsistent results regarding reliability and validity and thus, evidence-based consensus recommendations regarding diagnostic and therapeutic options may be helpful in clinical decision-making. Therefore, the German S3 guideline on titanium hypersensitivity in implant dentistry was developed. FINDINGS In the objectives, procedure, voting method and venue were defined and the consensus participants were invited. A systematic literature research was performed, and the overall quality of the evidence was rated according to the GRADE working group. Eight recommendations were formulated within the framework of a structured consensus conference under independent moderation and could be voted on with strong consensus (> 95% agreement). The formulated statements and recommendations were developed in small groups according to the guidelines of the Association of the Scientific Medical Societies in Germany (AWMF) and were discussed and agreed upon in the plenum. CONCLUSIONS For reasonable decision-making, a patient's clinical symptoms should be regarded as leading parameters, which are usually expressed by a local inflammatory reaction with subsequent disturbed osseous integration. Allergy tests, such as the epicutaneous test or the lymphocyte transformation test are not helpful in titanium intolerance assessments, since these tests indicate T cell-mediated allergies, which are not observed in titanium intolerance reactions. Other metals and impurities that might be present in superstructures or alloys also need to be considered as the cause of an intolerance reaction and a trigger for contact sensitization. In the case of a suspected titanium particle-related, local immunologically induced inflammatory reaction with subsequent impaired osseous integration, dental ceramic implants can be considered as a therapeutic option.
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Affiliation(s)
- Lena Katharina Müller-Heupt
- Department of Oral- and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131, Mainz, Germany.
| | - Eik Schiegnitz
- grid.410607.4Department of Oral- and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Sebahat Kaya
- grid.410607.4Department of Oral- and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | | | - Peer Wolfgang Kämmerer
- grid.410607.4Department of Oral- and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Bilal Al-Nawas
- grid.410607.4Department of Oral- and Maxillofacial Surgery, Plastic Surgery, University Medical Centre of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany
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Lee SK, Ji MK, Jo YJ, Park C, Cho H, Lim HP. Effect of Non-Thermal Plasma Treatment of Contaminated Zirconia Surface on Porphyromonas gingivalis Adhesion and Osteoblast Viability. MATERIALS 2022; 15:ma15155348. [PMID: 35955282 PMCID: PMC9369701 DOI: 10.3390/ma15155348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/26/2022] [Accepted: 08/02/2022] [Indexed: 02/05/2023]
Abstract
Plasma treatment on a zirconia surface prevents bacterial contamination and maintains osteoblast activity. To assess the degree of adhesion of Porphyromonas gingivalis on a zirconia surface after non-thermal plasma (NTP) treatment, specimens were treated with plasma for 60, 300, and 600 s, after which P. gingivalis was inoculated onto the surface and incubated for 48 h. To assess osteoblast activity after NTP treatment, osteoblasts (MC3T3-E1) were dispensed onto the specimens contaminated with P. gingivalis immediately after NTP for 60 and 120 s, followed by incubation for 48, 72, and 96 h. P. gingivalis was cultured after 60 s of NTP treatment of zirconia. The NTP and control groups showed no significant difference (p = 0.91), but adhesion was significantly increased following NTP treatment for 300 s or longer (300, 600 s groups) (p < 0.05). After NTP treatment of P. gingivalis-contaminated zirconia, osteoblast activity significantly increased at 72 and 96 h (I60 and I120 s group) in the groups treated with plasma (p < 0.017). Application of NTP to dental zirconia implants for 60 s not only inhibits the proliferation of P. gingivalis, which causes peri-implantitis but also increases osseointegration on zirconia surfaces contaminated with P. gingivalis.
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Affiliation(s)
- Seon-Ki Lee
- Department of Prosthodontics, Daejeon Dental Hospital, Wonkwang University, Daejeon 35233, Korea;
| | - Min-Kyung Ji
- Dental 4D Research Center, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Korea;
| | - Yu-Jin Jo
- Department of Prosthodontics, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (Y.-J.J.); (C.P.)
| | - Chan Park
- Department of Prosthodontics, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (Y.-J.J.); (C.P.)
| | - Hoonsung Cho
- School of Materials Science & Engineering, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Correspondence: (H.C.); (H.-P.L.); Tel.: +82-62-530-1717 (H.C.); +82-62-530-5577 (H.-P.L.)
| | - Hyun-Pil Lim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, 33 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (Y.-J.J.); (C.P.)
- Correspondence: (H.C.); (H.-P.L.); Tel.: +82-62-530-1717 (H.C.); +82-62-530-5577 (H.-P.L.)
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Kitajima H, Komatsu K, Matsuura T, Ozawa R, Saruta J, Taleghani SR, Cheng J, Ogawa T. Impact of nano-scale trabecula size on osteoblastic behavior and function in a meso-nano hybrid rough biomimetic zirconia model. J Prosthodont Res 2022; 67:288-299. [PMID: 35858802 DOI: 10.2186/jpr.jpr_d_22_00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE A novel implant model consisting of meso-scale cactus-inspired spikes and nano-scale bone-inspired trabeculae was recently developed to optimize meso-scale roughness on zirconia. In this model, the meso-spike dimension had a significant impact on osteoblast function. To explore how different nano-textures impact this model, here we examined the effect of different nano-trabecula sizes on osteoblast function while maintaining the same meso-spike conformation. METHODS Zirconia disks with meso-nano hybrid surfaces were created by laser etching. The meso-spikes were fixed to 40 μm high, whereas the nano-texture was etched as large and small trabeculae of average Feret diameter 237.0 and 134.1 nm, respectively. A polished surface was also prepared. Rat bone marrow-derived and human mesenchymal stromal cell-induced osteoblasts were cultured on these disks. RESULTS Hybrid rough surfaces, regardless of nano-trabecula dimension, robustly promoted the osteoblastic differentiation of both rat and human osteoblasts compared to those on polished surfaces. Hybrid surfaces with small nano-trabeculae further enhanced osteoblastic differentiation compared with large nano-trabeculae. However, the difference in osteoblastic differentiation between small and large nano-trabeculae was much smaller than the difference between the polished and hybrid rough surfaces. The nano-trabecula size did not influence osteoblast attachment and proliferation, or protein adsorption. Both hybrid surfaces were hydro-repellent. The atomic percentage of surface carbon was lower on the hybrid surface with small nano-trabeculae. CONCLUSIONS Small nano-trabeculae promoted osteoblastic differentiation more than large nano-trabeculae when combined with meso-scale spikes. However, the biological impact of different nano-trabeculae was relatively small compared with that of different dimensions of meso-spikes.
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Affiliation(s)
- Hiroaki Kitajima
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Keiji Komatsu
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Takanori Matsuura
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Ryotaro Ozawa
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Juri Saruta
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Samira Rahim Taleghani
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - James Cheng
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology and the Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668
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Pérez-Bellmunt A, Caballé-Serrano J, Rodríguez-Sanz J, Hidalgo-García C, González-Rueda V, Gassó-Villarejo S, Zegarra-Chávez D, López-de-Celis C. Comparison of resistive capacitive energy transfer therapy on cadaveric molars and incisors with and without implants. Sci Rep 2022; 12:11845. [PMID: 35831354 PMCID: PMC9279425 DOI: 10.1038/s41598-022-16189-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/06/2022] [Indexed: 12/23/2022] Open
Abstract
Capacitive–resistive energy transfer therapy (CRet) is used to improve the rehabilitation of different injuries. This study aimed to evaluate and compare the changes in temperature and current flow during different CRet applications on upper and lower molars and incisors, with and without implants, on ten cryopreserved corpses. Temperatures were taken on molars and incisors with invasive devices and skin temperature was taken with a digital thermometer at the beginning and after treatments. Four interventions: 15 VA capacitive hypothermic (CAPH), 8 watts resistive (RES8), 20 watts resistive (RES20) and 75 VA capacitive (CAP75) were performed for 5 min each. All treatments in this study generated current flow (more than 0.00005 A/m2) and did not generate a significant temperature increase (p > 0.05). However, RES20 application slightly increased surface temperature on incisors without implants (p = 0.010), and molar with (p = 0.001) and without implant (p = 0.008). Also, CAP75 application increased surface temperature on molars with implant (p = 0.002) and upper incisor with implant (p = 0.001). In conclusion, RES8 and CAPH applications seem to be the best options to achieve current flow without an increase in temperature on molars and incisors with and without implants.
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Affiliation(s)
- Albert Pérez-Bellmunt
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain.,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain
| | - Jordi Caballé-Serrano
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Universitat Internacional de Catalunya, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain.,Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Jacobo Rodríguez-Sanz
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain. .,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain.
| | - César Hidalgo-García
- Faculty of Health Sciences, University of Zaragoza, C/ Domingo Miral S/N, 50009, Zaragoza, Zaragoza, Spain
| | - Vanessa González-Rueda
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain.,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain.,Fundació Institut Universitari per a la Recerca a l'Atenció Primària de Salut Jordi Gol i Gurina, Barcelona, Spain
| | - Sergi Gassó-Villarejo
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain.,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain
| | - Daniel Zegarra-Chávez
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain.,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain
| | - Carlos López-de-Celis
- Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Campus Sant Cugat, Carrer de Josep Trueta s/n, Sant Cugat del Vallès, 08195, Barcelona, Spain.,ACTIUM Anatomy Group, Carrer de Josep Trueta, Sant Cugat del Vallès, 08195, Barcelona, Spain.,Fundació Institut Universitari per a la Recerca a l'Atenció Primària de Salut Jordi Gol i Gurina, Barcelona, Spain
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Diagnostic tests for titanium hypersensitivity in implant dentistry: a systematic review of the literature. Int J Implant Dent 2022; 8:29. [PMID: 35819566 PMCID: PMC9276909 DOI: 10.1186/s40729-022-00428-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/30/2022] [Indexed: 01/10/2023] Open
Abstract
PURPOSE There are rising concerns about titanium hypersensitivity reaction regarding dental endosseous implants. This review aims to summarize and compare the validity and reliability of the available dermatological and laboratory diagnostic tests regarding titanium hypersensitivity. The following PICO design was used: In Patients with titanium dental implants (P) does epicutaneous testing (ECT) (I), compared to lymphocyte transformation test (LTT) or Memory Lymphocyte Immunostimulation Assay (MELISA) (C) detect hypersensitivity reactions (O)? A literature search was performed including all studies dealing with this topic. Studies regarding orthopedic implants were excluded. METHODS Three databases (MEDLINE PubMed, Cochrane Library, SciELO) were screened for suitable studies and an additional manual search was also performed. Literature regarding hypersensitivity reactions in orthopedic implants, hypersensitivity reactions regarding implants not related to dental or maxillofacial surgery, animal studies and in vitro studies were excluded. A quality assessment of all selected full-text articles was performed. Randomized, controlled trials were evaluated with the Cochrane Risk of Bias Tool I. Cohort studies were assessed according to the New Castle-Ottawa Scale and case series according to Moga et al. (Development of a quality appraisal tool for case series studies using a modified Delphi technique. 2012). RESULTS 10 studies were included in the quantitative synthesis and available for the endpoint diagnostics of intolerance reactions to titanium dental implants: 2 clinical studies, 7 cohort studies and 1 case series. The potential for bias (internal validity) for these studies was overall rated as high. CONCLUSIONS The study of the available literature regarding ECT and MELISA or LTT in patients with suspected titanium hypersensitivity showed inconsistent results in terms of reliability and validity and thus, those tests should be regarded cautiously. There is strong evidence that titanium hypersensitivity in dental implants is associated with innate immunity: unspecific pro-inflammatory responses due to particle induced hyperreactivity of macrophages or toxicological responses especially towards nanoparticles rather than activation of the adaptive immune system. Therefore, tests detecting allergies do not seem expedient and inflammatory clinical signs should be regarded as leading parameters.
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Fonacier L, Frankel D, Mawhirt S. Contact allergens for the allergist. Ann Allergy Asthma Immunol 2022; 128:629-644. [PMID: 35346877 DOI: 10.1016/j.anai.2022.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The objective of this article is to provide an overview and describe typically encountered skin contact allergens implicated in allergic contact dermatitis (ACD). DATA SOURCES Published literature obtained through textbooks, online PubMed, and Google Scholar database searches, author photography, and adapted figures were used. STUDY SELECTIONS Studies on the evaluation of ACD and specific skin contact allergens were selected, with a focus on original research articles and clinical reviews. RESULTS Major classifications of common contact allergens include the following: (1) fragrances, (2) preservatives, (3) excipients, (4) rubber chemicals, (5) textile dyes, (6) topical medications, and (6) metals and other biomedical device components. The dermatitis distribution can aid in identifying the suspected contact allergen culprit. Certain contact allergens have features that are important to consider in the patch testing (PT) interpretation; these include possible irritant reactions, false-negative reactions or missed detection, and delayed reactions. Fragrances, preservatives, and excipients are culprits in personal products and facial or neck dermatitis. Patch testing with fragrances, preservatives, and patient-supplied products requires careful interpretation. Hand or foot dermatitis may be attributed to rubber chemicals or textile dyes. The management of topical corticosteroid contact allergy is guided on the basis of structural group classifications. Metal sensitization has been associated with dermatitis or biomedical device complications. CONCLUSION Each skin contact allergen has unique characteristics with regard to the dermatitis clinical presentation and potential PT nuances. These features are critical to recognize in the evaluation of ACD and PT interpretation and clinical relevance, leading to an accurate diagnosis.
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Affiliation(s)
- Luz Fonacier
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, New York University Langone Hospital-Long Island, Mineola, New York; New York University Long Island School of Medicine, Mineola, New York.
| | - David Frankel
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, New York University Langone Hospital-Long Island, Mineola, New York
| | - Stephanie Mawhirt
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, New York University Langone Hospital-Long Island, Mineola, New York; New York University Long Island School of Medicine, Mineola, New York
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Rutkowski R, Smeets R, Neuhöffer L, Stolzer C, Strick K, Gosau M, Sehner S, Volz KU, Henningsen A. Success and patient satisfaction of immediately loaded zirconia implants with fixed restorations one year after loading. BMC Oral Health 2022; 22:198. [PMID: 35606734 PMCID: PMC9125844 DOI: 10.1186/s12903-022-02231-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 04/25/2022] [Indexed: 11/27/2022] Open
Abstract
Background There is limited evidence for the use of zirconium dioxide implants in immediate implant placement as well as for related immediate loading protocols. The aim of this retrospective study was to investigate the survival rate, success and patient satisfaction of immediately placed zirconia implants compared to delayed placed implants. Methods The study included 58 partially edentulous patients who were treated between 2013 and 2015 with immediate and delayed transgingival healing zirconium dioxide implants (SDS, Kreuzlingen/ Switzerland). In addition to survival and success rate, marginal bone loss was assessed using radiographs and soft tissue was evaluated using Pink Esthetic Score. Oral health-related quality of life was investigated prospectively using a modified OHIP questionnaire. Results The cumulative survival rate of all implants included was 92% with 88% classified as full success. No significant difference was found between the bone levels of immediately and delayed placed and immediately and delayed loaded implants. The mean Pink Esthetic Score after final prosthetic rehabilitation was 12.2/14 points indicating excellent esthetic clinical results. Analysis of the OHIP questionnaire showed a mean value of 0.54/100 points reflecting a high patient satisfaction. Conclusions Immediate and delayed placed as well as loaded zirconium dioxide implants showed excellent results regarding implant success and survival in this study. Zirconium dioxide implants may ensure excellent esthetic results and high patient satisfaction. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-022-02231-0.
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Affiliation(s)
- Rico Rutkowski
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.,Division Regenerative Orofacial Medicine, Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Leon Neuhöffer
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Carolin Stolzer
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Kilian Strick
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Martin Gosau
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Susanne Sehner
- Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Anders Henningsen
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany. .,Division Regenerative Orofacial Medicine, Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
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Fletcher R, Harrison W, Crighton A. Dental material allergies and oral soft tissue reactions. Br Dent J 2022; 232:620-625. [PMID: 35562454 DOI: 10.1038/s41415-022-4195-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/11/2022] [Indexed: 11/09/2022]
Abstract
Dental materials can cause reactions to the oral mucosa and present to the general dental practitioner. These are often referred to as 'allergies' but are frequently lichenoid reactions. Most of these are related to dental amalgam restorations and can be remedied by replacing the restoration with another suitable material. Other metals, including gold, palladium, nickel and chrome, have also been reported to trigger mucosal changes. Less commonly, issues arise from other restorative materials, including denture acrylics, composites and glass polyalkenoates. Reactions are also reported due to endodontic and sealing materials. It is unclear what role skin 'patch' testing has in managing dental material allergies. This article aims to give the practitioner a clearer picture of dental material allergy issues and how they should be approached in primary dental practice.
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Affiliation(s)
- Rosie Fletcher
- Department of Oral Medicine, Glasgow Dental Hospital and School, NHS Greater Glasgow and Clyde, Scotland, UK
| | - William Harrison
- Department of Oral Medicine, Glasgow Dental Hospital and School, NHS Greater Glasgow and Clyde, Scotland, UK
| | - Alexander Crighton
- Department of Oral Medicine, Glasgow Dental Hospital and School, NHS Greater Glasgow and Clyde, Scotland, UK.
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TiO2 Nanocoatings with Controllable Crystal Type and Nanoscale Topography on Zirconia Implants to Accelerate Bone Formation. Bioinorg Chem Appl 2022; 2022:8650659. [PMID: 35529315 PMCID: PMC9068347 DOI: 10.1155/2022/8650659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 03/04/2022] [Indexed: 11/18/2022] Open
Abstract
In dentistry, zirconia implants have emerged as a promising alternative for replacing missing teeth due to their superior aesthetic performance and chemical stability. To improve the osseointegration of zirconia implants, modifying their surface with hierarchical micro/nanotopography and bioactive chemical composition are two effective ways. In this work, a microscale topography was prepared on a zirconia surface using hydrofluoric acid etching, and then a 50 nm TiO2 nanocoating was deposited via atomic layer deposition (ALD). Subsequently, an annealing treatment was used to transform the TiO2 from amorphous to anatase and simultaneously generate nanoscale topography. Various investigations into the coating surface morphology, topography, wettability, and chemical composition were carried out using scanning electron microscopy, white light interferometry, contact-angle measurement, X-ray diffraction, and X-ray photoelectron spectroscopy. In addition, in vitro cytocompatibility and osteogenic potential performance of the coatings were evaluated by human bone marrow mesenchymal stem cells (hBMSCs), and in vivo osseointegration performance was assessed in a rat femoral condyle model. Moreover, the possible mechanism was also investigated. The deposition of TiO2 film with/without annealing treatment did not alter the microscale roughness of the zirconia surface, whereas the nanotopography changed significantly after annealing. The in vitro studies revealed that the anatase TiO2 coating with regular wavelike nanostructure could promote the adhesion and proliferation of osteoblasts and further improve the osteogenic potential in vitro and osseointegration in vivo. These positive effects may be caused by nanoscale topography via the canonical Wnt/β-catenin pathway. The results suggest that using ALD in combination with annealing treatment to fabricate a nanotopographic TiO2 coating is a promising way to improve the osteogenic properties of zirconia implants.
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DEMİRCİ F, TANIK A. Comparison of the Effect of Denture Cleansers on Long-Term Water Sorption and Solubility of Polyetheretherketone with other Denture Base Materials. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2022. [DOI: 10.33808/clinexphealthsci.1011897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Objective: In this in vitro study, the effect of three denture cleansers (DCs) after immersion in a chemical solution applied to polyetheretherketone (PEEK) and other denture base materials (DBMs) on long-term water sorption and solubility was compared.
Methods: Disk-shaped specimens (50±1.0-mm diameter and 0.5±0.1-mm thickness) were prepared from four DBMs (n=48). All specimens were randomly subdivided into four storage media groups (n=12): Corega tablet (CT), Protefix tablet (PT), 1% sodium hypochlorite (NaOCl) solution (SH), and control (distilled water, DW). Storage media were renewed thrice a day for 120 days and simulated for 1-year use of overnight immersion. Water sorption and solubility (µg/mm3) of DBMs before and after immersion in storage media were examined and obtained data were statistically analyzed using a multivariate analysis of variance, followed by multiple comparisons by a posthoc Tukey’s test (p
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Integration of collagen fibers in connective tissue with dental implant in the transmucosal region. Int J Biol Macromol 2022; 208:833-843. [PMID: 35367473 DOI: 10.1016/j.ijbiomac.2022.03.195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/26/2022] [Accepted: 03/28/2022] [Indexed: 12/26/2022]
Abstract
Dental implants have been widely accepted as an ideal therapy to replace the missing teeth for its good performance in aspects of mechanical properties and aesthetic outcomes. Its restorative success is contributed by not only the successful osseointegration of the implant but also the tight soft tissue integration, especially the collagen fibers, in the transmucosal region. Soft tissue attaching to the dental implant/abutment is overall similar, but in some aspects distinct with that seen around natural teeth and soft tissue integration can be enhanced via several surface modification methods. This review is going to focus on the current knowledge of the transmucosal zone around the dental implants (compared with natural teeth), and latest strategies in use to fine-tune the collagen fibers assembly in the connective tissue, in an attempt to enhance soft tissue integration.
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Clinical and Radiographic Outcomes of Zirconia Dental Implants-A Clinical Case Series Study. MATERIALS 2022; 15:ma15072437. [PMID: 35407772 PMCID: PMC8999721 DOI: 10.3390/ma15072437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 11/17/2022]
Abstract
The purpose of this clinical series was to evaluate the clinical and radiographic outcomes of 20 zirconia dental implants, with a minimum follow-up of two years. Patients with at least one zirconia dental implant were included, with a mean follow-up of 34.05 months. The patient complaints such as pain and foreign body sensation, as well as clinical parameters including peri-implant infections with suppuration, implant mobility, gingival index (GI), modified plaque index (mPI), modified sulcus bleeding index (mBI), probing depth (PD) and radiological distance between the implant shoulder to the closest mesial and distal bone-to-implant contact (BIC), were assessed. All zirconia implants were successfully integrated without any pain or foreign body sensation. No mobility was detected in any of the 20 implants. Clinical examination revealed a mean PD of 2.56 mm and a radiological mean distance between the implant shoulder and the initial site of visible bone-to-implant contact (BIC) of 1.44 mm. In addition, GI, mPI and mBI indicated minimal to no inflammation. Results obtained from this series suggest that one-piece zirconia dental implants achieve good clinical and radiographic outcomes over a mean follow-up of 34 months and may be deemed a good option in patients with favorable bone conditions.
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Suphangul S, Rokaya D, Kanchanasobhana C, Rungsiyakull P, Chaijareenont P. PEEK Biomaterial in Long-Term Provisional Implant Restorations: A Review. J Funct Biomater 2022; 13:jfb13020033. [PMID: 35466215 PMCID: PMC9036277 DOI: 10.3390/jfb13020033] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/17/2022] [Accepted: 03/21/2022] [Indexed: 02/06/2023] Open
Abstract
Polyetheretherketone (PEEK) has become a useful polymeric biomaterial due to its superior properties and has been increasingly used in dentistry, especially in prosthetic dentistry and dental implantology. Promising applications of PEEK in dentistry are dental implants, temporary abutment, implant-supported provisional crowns, fixed prosthesis, removable denture framework, and finger prosthesis. PEEK as a long-term provisional implant restoration has not been studied much. Hence, this review article aims to review PEEK as a long-term provisional implant restoration for applications focusing on implant dentistry. Articles published in English on PEEK biomaterial for long-term provisional implant restoration were searched in Google Scholar, ScienceDirect, PubMed/MEDLINE, and Scopus. Then, relevant articles were selected and included in this literature review. PEEK presents suitable properties for various implant components in implant dentistry, including temporary and long-term provisional restorations. The modifications of PEEK result in wider applications in clinical dentistry. The PEEK reinforced by 30-50% carbon fibers can be a suitable material for the various implant components in dentistry.
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Affiliation(s)
- Suphachai Suphangul
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai 50200, Thailand; (S.S.); (C.K.); (P.R.)
| | - Dinesh Rokaya
- Department of Clinical Dentistry, Walailak University International College of Dentistry, Walailak University, Bangkok 10400, Thailand;
| | - Chatruethai Kanchanasobhana
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai 50200, Thailand; (S.S.); (C.K.); (P.R.)
| | - Pimduen Rungsiyakull
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai 50200, Thailand; (S.S.); (C.K.); (P.R.)
| | - Pisaisit Chaijareenont
- Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai 50200, Thailand; (S.S.); (C.K.); (P.R.)
- Correspondence: ; Tel.: +66-(0)53-944-438
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Zahra B, Nicholas B, Geoffrey R, Dina Z, Janal MN, Stuart F. Dental implant failure rates in patients with self-reported allergy to penicillin. Clin Implant Dent Relat Res 2022; 24:301-306. [PMID: 35313065 DOI: 10.1111/cid.13082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 01/21/2022] [Accepted: 03/01/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND In a number of previous studies, patients with reported penicillin allergies have been documented to experience higher rates of dental implant failure than those who had not reported this allergy. The authors of this study aimed to determine whether an increased risk of implant failure is associated with patient-reported penicillin allergy and which antibiotic was administered. METHODS AND MATERIALS A retrospective study was conducted through chart review of patients who received dental implants at the New York University College of Dentistry. Participants were eligible if they received one or more dental implants at the College and provided at least 1 year of follow-up data. RESULTS The overall implant failure rate was 12.9%. The failure rate in patients who reported no allergy to penicillin and took amoxicillin was 8.4%, while the failure rate in the allergy-reporting group was 17.1% (adjusted OR = 2.22, 95% CI = 1.44-3.44). The failure rate in allergy-reporting patients who took Clindamycin was also higher than in those who took amoxicillin (19.9%; adjusted OR = 2.9, 95% CI = 1.77-4.47) or any antibiotic other than amoxicillin (20.9%; adjusted OR = 2.77, 95% CI = 1.77-4.32). CONCLUSIONS Significant findings included a lower implant failure rate in patients taking amoxicillin than in patients taking other antibiotics. There was a significant increase in early implant failure in allergy reporting patients.
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Affiliation(s)
- Bagheri Zahra
- Ashman Department of Periodontology and Implant Dentistry, PI New York University College of Dentistry, New York, New York, USA
| | - Barrese Nicholas
- Ashman Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, USA
| | - Rubinshtein Geoffrey
- Ashman Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, USA
| | - Zahedi Dina
- Ashman Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, USA
| | - Malvin N Janal
- Epidemiology and Health Promotion, New York University College of Dentistry, New York, New York, USA
| | - Froum Stuart
- Ashman Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, USA
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Retrospective Study of Biohorizons® Implants Placed by Postgraduate Students at the University of Barcelona. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12062958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The study aimed to evaluate the survival and failure rate, in the short- and medium-term, in addition to its relationship with risk factors, in implants placed by postgraduate students of the Master of Medicine, Surgery, and Oral Implantology course from the University of Barcelona. The study was designed including 192 patients with 422 implants placed between 2015 and 2018. Variables of implant failure were evaluated and related. Failure was split into early failure and late failure. Qualitative data were compared using the chi-squared test, taking p ≤ 0.05 as a significant value. The comparison of quantitative variables was carried out using the Student’s t-test for independent samples. The survival rate in a period of 6 months to 3 years was 97.87%. The mean age of the patients was (54.5 ± 13), and the largest number of implants were placed in the 51–60 age range. The failure rate was 2.13% (N = 9), 6 failed early and 3 failed after definitive prosthetic loading, with a p value < 0.0001. When comparing the failures according to their location in the anterior/posterior sector of the arch, the anterior sector showed statistically significant results (p = 0.027). Failed implants had a statistically significant relationship when they were placed in the anterior sector and were performed in the early stage.
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Ion Release and Surface Changes of Nickel-Titanium Archwires Induced by Changes in the pH Value of the Saliva-Significance for Human Health Risk Assessment. MATERIALS 2022; 15:ma15061994. [PMID: 35329446 PMCID: PMC8954586 DOI: 10.3390/ma15061994] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/01/2022] [Accepted: 03/03/2022] [Indexed: 01/27/2023]
Abstract
The aim of this study was to explore whether changes in the salivary pH influence mechanical properties, surface roughness, and ion release from NiTi archwires with various surface coatings, and discuss the clinical significance of the findings. The uncoated, rhodium-coated, and nitrified NiTi wires were immersed into artificial saliva of different pH values (4.8, 5.1, 5.5, and 6.6). Released nickel and titanium ions were measured with inductively coupled plasma-optical emission spectroscopy at the end of 28 days. Atomic force microscopy was used to measure the arithmetic average surface roughness Ra, the root-mean-square roughness Rq, and the maximum height of the asperities RZ. The nanoindentation hardness (HIT) and Young's modulus (EIT) measurements were performed. The change in the pH of artificial saliva is inversely proportional to the release of titanium from both coated and uncoated wires, and the release of nickel from uncoated wires. The surface roughness parameters of both coated and uncoated wires are unaffected by the change in the pH of artificial saliva. The change in the pH of saliva has minor influence on the hardness and Young's modulus of elasticity of both coated and uncoated wires. The concentration of released metal ions measured was below the recommended upper limit for daily intake; nevertheless, hypersensitivity effects cannot be excluded, even at lower concentrations and at low pH.
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A Biocompatible Ultrananocrystalline Diamond (UNCD) Coating for a New Generation of Dental Implants. NANOMATERIALS 2022; 12:nano12050782. [PMID: 35269268 PMCID: PMC8911871 DOI: 10.3390/nano12050782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/09/2022] [Accepted: 02/17/2022] [Indexed: 02/04/2023]
Abstract
Implant therapy using osseointegratable titanium (Ti) dental implants has revolutionized clinical dental practice and has shown a high rate of success. However, because a metallic implant is in contact with body tissues and fluids in vivo, ions/particles can be released into the biological milieu as a result of corrosion or biotribocorrosion. Ultrananocrystalline diamond (UNCD) coatings possess a synergistic combination of mechanical, tribological, and chemical properties, which makes UNCD highly biocompatible. In addition, because the UNCD coating is made of carbon (C), a component of human DNA, cells, and molecules, it is potentially a highly biocompatible coating for medical implant devices. The aim of the present research was to evaluate tissue response to UNCD-coated titanium micro-implants using a murine model designed to evaluate biocompatibility. Non-coated (n = 10) and UNCD-coated (n = 10) orthodontic Ti micro-implants were placed in the hematopoietic bone marrow of the tibia of male Wistar rats. The animals were euthanized 30 days post implantation. The tibiae were resected, and ground histologic sections were obtained and stained with toluidine blue. Histologically, both groups showed lamellar bone tissue in contact with the implants (osseointegration). No inflammatory or multinucleated giant cells were observed. Histomorphometric evaluation showed no statistically significant differences in the percentage of BIC between groups (C: 53.40 ± 13% vs. UNCD: 58.82 ± 9%, p > 0.05). UNCD showed good biocompatibility properties. Although the percentage of BIC (osseointegration) was similar in UNCD-coated and control Ti micro-implants, the documented tribological properties of UNCD make it a superior implant coating material. Given the current surge in the use of nano-coatings, nanofilms, and nanostructured surfaces to enhance the biocompatibility of biomedical implants, the results of the present study contribute valuable data for the manufacture of UNCD coatings as a new generation of superior dental implants.
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Liu M, Wang Y, Zhang S, Wei Q, Li X. Success Factors of Additive Manufactured Root Analogue Implants. ACS Biomater Sci Eng 2022; 8:360-378. [PMID: 34990114 DOI: 10.1021/acsbiomaterials.1c01079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dental implantation is an effective method for the treatment of loose teeth, but the threaded dental implants used in the clinic cannot match with the tooth extraction socket. A root analogue implant (RAI) has the congruence shape, which reduces the damage to bone and soft tissue. Additive manufacturing (AM) technologies have the advantages of high precision, flexibility, and easy operation, becoming the main manufacturing method of RAI in basic research. The purpose of this systematic review is to summarize AM technologies used for RAI manufacturing as well as the factors affecting successful implantation. First, it introduces the AM technologies according to different operating principles and summarizes the advantages and disadvantages of each method. Then the influences of materials, structure design, surface characteristics, implant site, and positioning are discussed, providing reference for designers and dentists. Finally, it addresses the gap between basic research and clinical application for additive manufactured RAIs and discusses the current challenges and future research directions for this field.
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Affiliation(s)
- Minyan Liu
- Department of Industry Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yanen Wang
- Department of Industry Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Shan Zhang
- Department of Industry Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Qinghua Wei
- Department of Industry Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xinpei Li
- Department of Industry Engineering, School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
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Is Allergy to Titanium Bone Fixation Plates a Problem? COATINGS 2022. [DOI: 10.3390/coatings12020214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Open reduction and internal fixation (ORIF) with titanium fixation plates is the gold standard for maxillofacial fracture treatment. Titanium is considered a fully compatible material. However, reports of allergic reactions to titanium implants do occur. The aim of this work is to answer the question whether titanium devices used in the treatment of fractures in the craniofacial region can cause allergic reactions. The study comprised 50 subjects treated surgically for maxillofacial injuries with the use of titanium composite devices. Allergic tests were performed by the patch method. The control group consisted of 20 healthy people who did not have any titanium elements. There were no skin changes to titanium and its compounds in both the test and control groups. Only one patient had a positive skin test which showed an allergic reaction to silver nitrate. Titanium fixing elements, as well as titanium dental implants, according to our research, do not show allergic skin reactions.
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Titanium Hypersensitivity Diagnosed by Patch Testing After Anterior Cervical Spine Fusion. Dermatitis 2022; 33:e59-e60. [PMID: 35089900 DOI: 10.1097/der.0000000000000846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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