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Voß AS, Bunz O, Kurbad O, Bürgers R. Fully digital workflow of an occlusal device including digital facebow record: A clinical report. J Prosthet Dent 2024:S0022-3913(24)00061-1. [PMID: 38365524 DOI: 10.1016/j.prosdent.2024.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 02/18/2024]
Abstract
In many current digital workflows for the production of occlusal devices and dentures, the traditional facebow record for the individual determination of the hinge axis has been omitted. A novel digital facebow record procedure including a scannable occlusal fork is described as a straightforward to use, cost-effective, and less time-consuming alternative to close this gap in fully digital prosthetic workflows.
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Affiliation(s)
- Anna-Sophia Voß
- Prosthodontist, Department of Prosthodontics, University Medical Center Göttingen, Göttingen, Germany
| | - Oskar Bunz
- Prosthodontist, Department of Prosthodontics, University Medical Center Göttingen, Göttingen, Germany
| | - Oliver Kurbad
- Prosthodontist, Department of Prosthodontics, University Medical Center Göttingen, Göttingen, Germany
| | - Ralf Bürgers
- Professor and Head of Department, Department of Prosthodontics, University Medical Center Göttingen, Göttingen, Germany.
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2
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Bunz O, Steegmann MC, Benz K, Testrich H, Quade A, Naumova EA, Arnold WH, Fricke K, Piwowarczyk A, Dittmar T. Human Gingival Fibroblast Adhesion and Proliferation on Hydroxyapatite-Coated Zirconia Abutment Surfaces. Materials (Basel) 2022; 15:ma15103625. [PMID: 35629651 PMCID: PMC9145355 DOI: 10.3390/ma15103625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 12/07/2022]
Abstract
Applying antibacterial coatings to dental implant materials seems reasonable but can have negative influences on desired cell adhesion and healing. In this study, zirconia abutment specimens interacting with gingival tissue were used. The aim was to compare the influence of machined or coated zirconia surfaces on the adhesion and proliferation of human gingival fibroblasts (HGF-1). Surface modifications were performed using atmospheric plasma coating with hydroxyapatite, zinc, and copper. Zirconia specimens were divided into four groups: hydroxyapatite, hydroxyapatite with zinc oxide (ZnO), hydroxyapatite with copper (Cu), and an untreated machined surface. After the characterization of the surface conditions, the morphology of adhered HGF-1 was determined by fluorescence staining and subjected to statistical evaluation. The visual analysis of cell morphology by SEM showed flat, polygonal, and largely adherent fibroblast cells in the untreated group, while round to partially flat cells were recorded in the groups with hydroxyapatite, hydroxyapatite + ZnO, and hydroxyapatite + Cu. The cell membranes in the hydroxyapatite + ZnO and hydroxyapatite + Cu groups appeared porous. The results show that HGF-1 adhere and proliferate well on machined zirconia, while plasma coating with hydroxyapatite or hydroxyapatite mixtures does not lead to increased adhesion or proliferation.
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Affiliation(s)
- Oskar Bunz
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany;
- Correspondence:
| | | | - Korbinian Benz
- Department of Oral Surgery and Dental Emergency Care, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany;
| | - Holger Testrich
- Research Group of Bioactive Surfaces, INP Greifswald e.V., 17489 Greifswald, Germany; (H.T.); (A.Q.); (K.F.)
| | - Antje Quade
- Research Group of Bioactive Surfaces, INP Greifswald e.V., 17489 Greifswald, Germany; (H.T.); (A.Q.); (K.F.)
| | - Ella A. Naumova
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (E.A.N.); (W.H.A.)
| | - Wolfgang H. Arnold
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (E.A.N.); (W.H.A.)
| | - Katja Fricke
- Research Group of Bioactive Surfaces, INP Greifswald e.V., 17489 Greifswald, Germany; (H.T.); (A.Q.); (K.F.)
| | - Andree Piwowarczyk
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany;
| | - Thomas Dittmar
- Institute of Immunology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, 58453 Witten, Germany;
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Bunz O, Kalz P, Benz CI, Naumova EA, Arnold WH, Piwowarczyk A. Cold Atmospheric Plasma Improves Shear Bond Strength of Veneering Composite to Zirconia. Dent J (Basel) 2021; 9:dj9060059. [PMID: 34064262 PMCID: PMC8224273 DOI: 10.3390/dj9060059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/23/2021] [Accepted: 05/17/2021] [Indexed: 11/30/2022] Open
Abstract
Chipping of veneering is the most common clinical complication for zirconia restorations. Veneering composite could be a promising alternative to renew restorations. Zirconia discs (3-YSZ) were prepared with varying surface treatments and bonded to indirect composite as follows: air abrasion and Scotchbond Universal (A/SU); air abrasion and Clearfil Ceramic Primer (A/C); air abrasion and MKZ Primer (A/M); air abrasion and Monobond Plus (A/MP); silica-coating and Scotchbond Universal (S/SU); air abrasion (AP/SU), additional cold atmospheric plasma treatment, and Scotchbond Universal. An indirect composite material was then applied to the zirconia specimens. Specimens were divided into subgroups for short-term (14 days storage at 37 °C and 5000 thermal cycles) and long-term (250 days storage and 37,500 thermal cycles) artificial aging. Shear bond strength measurement (SBS) was performed, and data were analyzed by Kruskal–Wallis-test and multiple comparison testing with Dunn’s correction (p ≤ 0.05). The median SBS values (MPa) of short- and long-term artificial aging were: 3.09/1.36 (A/SU); 0.77/1.43 (S/SU); 2.82/2.15 (AP/SU); 1.97/1.80 (A/C); 2.01/1.58 (A/M); and 1.70/1.68 (A/MP). For short-term artificial aging A/SU showed the highest median SBS values, whereas in the long-term trial, AP/SU showed the highest values and the difference was significant. A prolonged artificial aging decreased SBS in all groups, except S/SU. In summary, treatment with CAP can improve SBS in the long-term.
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Affiliation(s)
- Oskar Bunz
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (C.I.B.); (A.P.)
- Correspondence:
| | - Paul Kalz
- Private Practice, 45128 Essen, Germany;
| | - Carla I. Benz
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (C.I.B.); (A.P.)
| | - Ella A. Naumova
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (E.A.N.); (W.H.A.)
| | - Wolfgang H. Arnold
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (E.A.N.); (W.H.A.)
| | - Andree Piwowarczyk
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany; (C.I.B.); (A.P.)
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Abstract
High performance polymers like PEEK (polyetheretherketone) and FRC (fiberreinforced composite) could substitute metallic alloys for removable partial dentures. However, these polymers require aesthetic veneering. This study was to determine the bond strength to direct composite. Specimens made of PEEK and FRC were produced and air-abraded (50 μm aluminum-oxide). Specimens were allocated to four experimental groups: Luxatemp Glaze & Bond, Scotchbond Universal, SR Nexco Connect and iBond Universal. Specimens were divided into three subgroups for short-term, long-term and no artificial aging and shear bond strength (SBS) was evaluated. SBS of specimens made of PEEK with no artificial aging showed values between 10.79-14.00 MPa, short-term artificial aging resulted in values between 3.78-13.85 MPa and after long-term artificial aging SBS decreased to 0-8.75 MPa. SBS measurement of FRC specimens resulted in values between 9.83-12.1 MPa without aging, after short-term artificial aging values decreased to 8.36-11.98 MPa and after long-term aging SBS showed a degradation to 4.52-7.82 MPa.
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Affiliation(s)
- Oskar Bunz
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University
| | - Carla I Benz
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University
| | - Wolfgang H Arnold
- Department of Biological and Material Sciences in Dentistry, School of Dentistry, Faculty of Health, Witten/Herdecke University
| | - Andree Piwowarczyk
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University
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Gao J, Zhang W, Mese K, Bunz O, Lu F, Ehrhardt A. Transient Chimeric Ad5/37 Fiber Enhances NK-92 Carrier Cell-Mediated Delivery of Oncolytic Adenovirus Type 5 to Tumor Cells. Mol Ther Methods Clin Dev 2020; 18:376-389. [PMID: 32695840 PMCID: PMC7358217 DOI: 10.1016/j.omtm.2020.06.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/28/2020] [Indexed: 01/09/2023]
Abstract
Methods for customizing and improving virus vector tropism are limited. In this study, we introduce a microRNA (miRNA)-regulated molecular method to enhance vector transduction without genome alteration. Based on the importance of adenovirus (Ad) vectors for cancer and gene treatment, we exemplified this technology for an Ad type 5 (Ad5) vector temporally carrying a knob from Ad37. We constructed a producer cell line stably expressing a fused Ad5/37 chimeric fiber comprising the Ad5 shaft-tail and the Ad37 knob and a miRNA inhibiting Ad5 knob expression (HEK293-Ad5/37-miRNA). The chimeric Ad5/37 vector resulted in enhanced transduction rates in Ad37 adequately and Ad5 poorly transduced cells. Particularly, encapsidation of the oncolytic Ad5-human telomerase reverse transcriptase (hTERT) vector genome into the chimeric Ad5/37 capsid showed efficient transduction of NK-92 carrier cells. These infected carrier cells then delivered the oncolytic vector to tumor cells, which resulted in enhanced Ad5-hTERT-mediated tumor cell killing. We show that this transiently capsid-modified chimeric vector carrying an Ad5 genome displayed higher transduction efficiencies of natural killer cell-derived NK-92 cells utilized as carriers in cancer immune therapy. In summary, transiently modified adenoviral vectors will have important implications for cancer and gene therapy.
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Affiliation(s)
- Jian Gao
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Wenli Zhang
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Kemal Mese
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Oskar Bunz
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Fengmin Lu
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Anja Ehrhardt
- Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
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Mese K, Bunz O, Schellhorn S, Volkwein W, Jung D, Gao J, Zhang W, Baiker A, Ehrhardt A. Identification of novel human adenovirus candidates using the coxsackievirus and adenovirus receptor for cell entry. Virol J 2020; 17:52. [PMID: 32272960 PMCID: PMC7146880 DOI: 10.1186/s12985-020-01318-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 03/19/2020] [Indexed: 12/12/2022] Open
Abstract
Background There are over 100 known human adenovirus (HAdV) types, which are able to cause a broad variety of different self-limiting but also lethal diseases especially in immunocompromised patients. Only limited information about the pathogenesis and biology of the majority of these virus types is available. In the present study, we performed a systematic screen for coxsackievirus and adenovirus receptor (CAR)-usage of a large spectrum of HAdV types. Methods To study receptor usage we utilized a recombinant HAdV library containing HAdV genomes tagged with a luciferase and GFP encoding transgene. We infected CHO-CAR cells stably expressing the CAR receptor and to much information with tagged viruses (HAdV3, 14, 16, 50, 10, 24, 27, 37 and 69) and measured luciferase expression levels 26 and for some viruses (AdV10, − 24 and − 27) 52 h post-infection. As positive control, we applied human adenovirus type 5 (HAdV5) known to use the CAR receptor for cell entry. For viruses replication studies on genome level we applied digital PCR. Results Infection of CHO-CAR and CHO-K1 cells at various virus particle numbers per cell (vpc) revealed that HAdV10, 24, and 27 showed similar or decreased luciferase expression levels in the presence of CAR. In contrast, HAdV3, 14, 16, 50, 37 and 69 resulted in increased luciferase expression levels in our initial screening experiments. CAR usage of HAdV3, 14, 50, and 69 was not studied before, and therefore we experimentally confirmed CAR usage for these HAdV as novel viruses utilizing CAR as a receptor. To rule out that replication of HAdV in transduced CHO cells is responsible for increased transduction rates we performed replication assays on virus genome level, which revealed that there is no HAdV replication. Conclusion In the present study, we screened a HAdV library and identified novel human HAdV using the CAR receptor. To our knowledge, this is the first description of CAR usage for HAdV 3, 14, 50, and 69.
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Affiliation(s)
- Kemal Mese
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Oskar Bunz
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Sebastian Schellhorn
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Wolfram Volkwein
- Bavarian Health and Food Safety Authority (LGL), Oberschleissheim, Germany
| | - Dominik Jung
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Jian Gao
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Wenli Zhang
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany
| | - Armin Baiker
- Bavarian Health and Food Safety Authority (LGL), Oberschleissheim, Germany
| | - Anja Ehrhardt
- Institute for Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Stockumer Str. 10, 58453, Witten, Germany.
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Bunz O, Mese K, Funk C, Wulf M, Bailer SM, Piwowarczyk A, Ehrhardt A. Cold atmospheric plasma as antiviral therapy - effect on human herpes simplex virus type 1. J Gen Virol 2020; 101:208-215. [PMID: 31961788 PMCID: PMC7414428 DOI: 10.1099/jgv.0.001382] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/17/2019] [Indexed: 12/17/2022] Open
Abstract
In previous studies, cold atmospheric plasma (CAP) was explored as an antibacterial and antiviral agent for the treatment of chronic wounds. The aim of the present study was to investigate whether CAP may also be suitable as an antiviral therapy against herpes simplex virus type 1 (HSV-1). HSV-1 most frequently manifests as recurrent herpes labialis, but it can also cause encephalitis, conjunctivitis or herpes neonatorum as a perinatal infection. HSV-1 encoding the reporter gene GFP was propagated. The CAP dose for HSV-1 treatment was gradually increased, ranging from 0-150 s, and aciclovir was used as a positive control. After CAP treatment, the virus suspension was applied to a standard HSV research cell line (Vero cells) and the neuroblastoma cell line SH-SY5Y as a model for neuronal infection. The results showed that plasma treatment had a negligible antiviral effect on HSV-1 in both Vero- and SH-SY5Y cells at high dose. However, when we lowered the viral load 100-fold, we observed a significantly decreased number of internalized HSV-1 genomes 3 h post-infection for CAP-treated viruses. This difference was less pronounced with respect to GFP expression levels 24 h post-infection, which was in sharp contrast to the acyclovir-treated positive control, for which the viral load was reduced from 95 to 25%. In summary, we observed a low but measurable antiviral effect of CAP on HSV-1.
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Affiliation(s)
- Oskar Bunz
- Institute of Immunology, Centre for Biomedical Education and Research (ZBAF), School of Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Kemal Mese
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Christina Funk
- Fraunhofer Institute for Interfacial Engineering and Biotechnology, Stuttgart, Germany
| | - Maximilan Wulf
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Susanne M. Bailer
- Fraunhofer Institute for Interfacial Engineering and Biotechnology, Stuttgart, Germany
- Institute for Interfacial Engineering and Plasma Technology IGVP, University of Stuttgart, Stuttgart, Germany
| | - Andree Piwowarczyk
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Anja Ehrhardt
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
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Gao J, Mese K, Bunz O, Ehrhardt A. State‐of‐the‐art human adenovirus vectorology for therapeutic approaches. FEBS Lett 2019; 593:3609-3622. [DOI: 10.1002/1873-3468.13691] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/16/2019] [Accepted: 11/18/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Jian Gao
- Faculty of Health Centre for Biomedical Education and Research (ZBAF) School of Human Medicine Institute of Virology and Microbiology Witten/Herdecke University Germany
| | - Kemal Mese
- Faculty of Health Centre for Biomedical Education and Research (ZBAF) School of Human Medicine Institute of Virology and Microbiology Witten/Herdecke University Germany
| | - Oskar Bunz
- Faculty of Health Centre for Biomedical Education and Research (ZBAF) School of Human Medicine Institute of Virology and Microbiology Witten/Herdecke University Germany
| | - Anja Ehrhardt
- Faculty of Health Centre for Biomedical Education and Research (ZBAF) School of Human Medicine Institute of Virology and Microbiology Witten/Herdecke University Germany
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Bunz O, Mese K, Zhang W, Piwowarczyk A, Ehrhardt A. Effect of cold atmospheric plasma (CAP) on human adenoviruses is adenovirus type-dependent. PLoS One 2018; 13:e0202352. [PMID: 30365500 PMCID: PMC6203248 DOI: 10.1371/journal.pone.0202352] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 08/01/2018] [Indexed: 01/11/2023] Open
Abstract
More than 70 human adenovirus types were identified divided into 7 different species (A-G). Diseases caused by human adenoviruses are type-dependent and can range from mild to severe respiratory infections, gastrointestinal infections or eye infections such as epidemic keratoconjunctivitis. Unfortunately there is no specific anti-adenovirus therapy available. Here we addressed the question whether treatment with cold atmospheric plasma (CAP) for anti-adenoviral therapy such as virus-mediated ulcerations may be feasible. CAP has already been explored for the treatment of dermatological diseases such as chronic wounds. To investigate whether CAP is an effective antiviral tool, purified human adenovirus types derived from different human adenovirus species (HAdV -4, -5, -20, -35, -37, -50) tagged with luciferase were treated with defined dosages of plasma. The CAP treatment was varied by incrementally increasing the time span of CAP treatment. After CAP treatment, the virus containing solution was added to eukaryotic cells and the viral load was determined by measurement of luciferase expression levels. Through the plasma treatment the adenovirus driven luciferase expression directly correlating with adenovirus transduction efficiencies could be reduced for HAdV-5 and HAdV-37. Plasma treatment had no influence on adenovirus derived luciferase expression levels for HAdV-4 and HAdV-50 and it even had a positive effect on luciferase expression levels for HAdV-20 and HAdV-35. These results suggest that CAP has a type dependent effect on adenoviruses and that infectivity can be even increased for certain adenovirus types. Further studies should address the mechanisms behind this phenomenon. In summary we demonstrate that CAP may represent an interesting option for antiviral treatment in a virus type dependent manner.
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Affiliation(s)
- Oskar Bunz
- Institute of Immunology, Centre for Biomedical Education and Research (ZBAF), School of Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Kemal Mese
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Wenli Zhang
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Andree Piwowarczyk
- Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Anja Ehrhardt
- Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
- * E-mail:
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Kozmacs C, Baumann V, Bunz O, Piwowarczyk A. Relative Clinical Success of Bis-Acryl Composite Provisional Crowns. Compend Contin Educ Dent 2018; 39:e9-e12. [PMID: 29293015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The high demands on the clinical performance of a single-tooth provisional restoration necessitate that said performance be examined. The authors evaluated 24 teeth evaluated. Two test groups received bis-acrylic composite for provisional crowns (n = 12) and a single-unit, self-supporting, malleable, light-curing composite crown (n = 12). Final crowns (n = 24) served as paired controls. Evaluation of clinical success was measured using previously selected subcategories of FDI criteria. Statistical analysis was performed using McNemar's Test (α = 0.05). The null hypothesis of no improvement of the definitive crown relative to the provisionals was rejected at the 5% significance level (McNemar's P value <.001, Bonferroni corrected). Of the provisional crowns, 75% received a clinically insufficient valuation, while only 8% of the definitive crowns did. The authors concluded that, independent of the manufacturing process, a bis-acrylic composite provisional crown cannot serve as a replacement for a conventionally manufactured definitive crown.
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Affiliation(s)
- Carla Kozmacs
- Department of Prosthodontics and Dental Technology, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Vanessa Baumann
- Research Assistant, Institute for Medical Biometry and Epidemiology, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Oskar Bunz
- Department of Prosthodontics and Dental Technology, Faculty of Health, Witten/Herdecke University, Witten, Germany
| | - Andree Piwowarczyk
- Department of Prosthodontics and Dental Technology, Faculty of Health, Witten/Herdecke University, Witten, Germany
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