1
|
Zhang T, Zhou W, Yang W, Bi J, Li H, Gao X, Zhang B, Shi G, Li K, Wei Z, Pan X, Feng S. Vancomycin-encapsulated hydrogel loaded microarc-oxidized 3D-printed porous Ti6Al4V implant for infected bone defects: Reconstruction, anti-infection, and osseointegration. Bioact Mater 2024; 42:18-31. [PMID: 39262845 PMCID: PMC11388676 DOI: 10.1016/j.bioactmat.2024.07.035] [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: 06/06/2024] [Revised: 07/30/2024] [Accepted: 07/30/2024] [Indexed: 09/13/2024] Open
Abstract
Infected bone defect is a formidable clinical challenge. Conventional approaches to prevention and treatment for infected bone defects are unsatisfactory. The key elements of the treatment are bone defect reconstruction, anti-infection, and osteogenesis. Conventional treatment methods remain unsatisfactory owing to the absence of composite integrating materials with anti-infective, and osteogenic activities as well as proper mechanical strength at the same time. In this study, we fabricated a vancomycin-encapsulated hydrogel with bacteria-responsive release properties combined with a shaved porous (submicron-micron) three-dimensional-printed Ti6Al4V implant. The implant surface, modified with submicron-sized pores through microarc oxidation (MAO), showed enhanced osteogenic activity and integrated well with the hydrogel drug release system, enabling sustained vancomycin release. In vitro experiments underscored the commendable antibacterial ability, biosafety, and osteoinductive potential. Effective antibacterial and osteogenic abilities of the implant were further demonstrated in vivo in infected rabbit bone defects. These results showed that the vancomycin-encapsulated hydrogel-loaded microarc-oxidized 3D-printed porous Ti6Al4V can repair the infected bone defects with satisfactory anti-infection and osseointegration effects.
Collapse
Affiliation(s)
- Teng Zhang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Wenhao Zhou
- Shaanxi Key Laboratory of Biomedical Metallic Materials, Northwest Institute for Non-ferrous Metal Research, Xi'an, 710016, China
| | - Wanliang Yang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Jingwei Bi
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Hao Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Xianlei Gao
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Baoliang Zhang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Guidong Shi
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Ka Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Zhijian Wei
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
- International Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - Xin Pan
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Shiqing Feng
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, 250012, China
| |
Collapse
|
2
|
Woelber JP, Al-Ahmad A, Alt KW. On the Pathogenicity of the Oral Biofilm: A Critical Review from a Biological, Evolutionary, and Nutritional Point of View. Nutrients 2022; 14:nu14102174. [PMID: 35631315 PMCID: PMC9144701 DOI: 10.3390/nu14102174] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/16/2022] [Accepted: 05/20/2022] [Indexed: 12/21/2022] Open
Abstract
Plaque control is one of the most recommended approaches in the prevention and therapy of caries and periodontal diseases. However, although most individuals in industrialized countries already perform daily oral hygiene, caries and periodontal diseases still are the most common diseases of mankind. This raises the question of whether plaque control is really a causative and effective approach to the prevention of these diseases. From an evolutionary, biological, and nutritional perspective, dental biofilms have to be considered a natural phenomenon, whereas several changes in human lifestyle factors during modern evolution are not “natural”. These lifestyle factors include the modern “Western diet” (rich in sugar and saturated fats and low in micronutrients), smoking, sedentary behavior, and continuous stress. This review hypothesizes that not plaque itself but rather these modern, unnatural lifestyle factors are the real causes of the high prevalence of caries and periodontal diseases besides several other non-communicable diseases. Accordingly, applying evolutionary and lifestyle medicine in dentistry would offer a causative approach against oral and common diseases, which would not be possible with oral hygiene approaches used on their own.
Collapse
Affiliation(s)
- Johan Peter Woelber
- Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany;
- Correspondence:
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany;
| | - Kurt Werner Alt
- Center of Natural and Cultural Human History, Danube Private University, Steiner Landstrasse 124, 3500 Krems-Stein, Austria;
| |
Collapse
|
3
|
Özcan M, Magini EB, Volpato GM, Cruz A, Volpato CAM. Additive Manufacturing Technologies for Fabrication of Biomaterials for Surgical Procedures in Dentistry: A Narrative Review. J Prosthodont 2022; 31:105-135. [PMID: 35313027 DOI: 10.1111/jopr.13484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2022] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To screen and critically appraise available literature regarding additive manufacturing technologies for bone graft material fabrication in dentistry. MATERIAL AND METHODS PubMed and Scopus were searched up to May 2021. Studies reporting the additive manufacturing techniques to manufacture scaffolds for intraoral bone defect reconstruction were considered eligible. A narrative review was synthesized to discuss the techniques for bone graft material fabrication in dentistry and the biomaterials used. RESULTS The databases search resulted in 933 articles. After removing duplicate articles (128 articles), the titles and abstracts of the remaining articles (805 articles) were evaluated. A total of 89 articles were included in this review. Reading these articles, 5 categories of additive manufacturing techniques were identified: material jetting, powder bed fusion, vat photopolymerization, binder jetting, and material extrusion. CONCLUSIONS Additive manufacturing technologies for bone graft material fabrication in dentistry, especially 3D bioprinting approaches, have been successfully used to fabricate bone graft material with distinct compositions.
Collapse
Affiliation(s)
- Mutlu Özcan
- Division of Dental Biomaterials, Center of Dental Medicine, Clinic for Reconstructive Dentistry, University of Zürich, Zürich, Switzerland
| | - Eduarda Blasi Magini
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | | | - Ariadne Cruz
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | | |
Collapse
|
4
|
Giliomee J, du Toit LC, Klumperman B, Choonara YE. Investigation of the 3D Printability of Covalently Cross-Linked Polypeptide-Based Hydrogels. ACS OMEGA 2022; 7:7556-7571. [PMID: 35284718 PMCID: PMC8908529 DOI: 10.1021/acsomega.1c05873] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
The 3D printability of poly(l-lysine-ran-l-alanine) and four-arm poly(ethylene glycol) (P(KA)/4-PEG) hydrogels as 3D biomaterial inks was investigated using two approaches to develop P(KA)/4-PEG into 3D biomaterial inks. Only the "composite microgel" inks were 3D printable. In this approach, P(KA)/4-PEG hydrogels were processed into microparticles and incorporated into a polymer solution to produce a composite microgel paste. Polymer solutions composed of either 4-arm PEG-acrylate (4-PEG-Ac), chitosan (CS), or poly(vinyl alcohol) (PVA) were used as the matrix material for the composite paste. The three respective composite microgel inks displayed good 3D printability in terms of extrudability, layer-stacking ability, solidification mechanism, and 3D print fidelity. The biocompatibility of P(KA)/4-PEG hydrogels was retained in the 3D printed scaffolds, and the biofunctionality of bioinert 4-PEG and PVA hydrogels was enhanced. CS-P(KA)/4-PEG inks demonstrated excellent 3D printability and proved highly successful in printing scaffolds with a narrow strand diameter (∼200 μm) and narrow strand spacing (∼500 μm) while the integrity of the vertical and horizontal pores was maintained. Using different needle IDs and strand spacing, certain physical properties of the hydrogels could be tuned, while the 3D printed porosity was kept constant. This included the surface area to volume ratio, the macropore sizes, and the mechanical properties. The scaffolds demonstrated adequate adhesion and spreading of NIH 3T3 fibroblasts seeded on the scaffold surfaces for 4 days. Consequently, the scaffolds were considered suitable for potential applications in wound healing, as well as other soft tissue engineering applications. Apart from the contribution to new 3D biomaterial inks, this work also presented a new and facile method of processing covalently cross-linked hydrogels into 3D printed scaffolds. This could potentially "unlock" the 3D printability of biofunctional hydrogels, which are generally excluded from 3D printing applications.
Collapse
Affiliation(s)
- Johnel Giliomee
- Wits
Advanced Drug Delivery Platform Research Unit, Department of Pharmacy
and Pharmacology, School of Therapeutic Sciences, Faculty of Health
Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South
Africa
| | - Lisa C. du Toit
- Wits
Advanced Drug Delivery Platform Research Unit, Department of Pharmacy
and Pharmacology, School of Therapeutic Sciences, Faculty of Health
Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South
Africa
| | - Bert Klumperman
- Department
of Chemistry and Polymer Science, Faculty of Science, Stellenbosch University, De Beers Street, Stellenbosch 7600, South Africa
| | - Yahya E. Choonara
- Wits
Advanced Drug Delivery Platform Research Unit, Department of Pharmacy
and Pharmacology, School of Therapeutic Sciences, Faculty of Health
Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South
Africa
| |
Collapse
|
5
|
Kunrath MF, Dahlin C. The Impact of Early Saliva Interaction on Dental Implants and Biomaterials for Oral Regeneration: An Overview. Int J Mol Sci 2022; 23:2024. [PMID: 35216139 PMCID: PMC8875286 DOI: 10.3390/ijms23042024] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 12/11/2022] Open
Abstract
The presence of saliva in the oral environment is relevant for several essential health processes. However, the noncontrolled early saliva interaction with biomaterials manufactured for oral rehabilitation may generate alterations in the superficial properties causing negative biological outcomes. Therefore, the present review aimed to provide a compilation of all possible physical-chemical-biological changes caused by the early saliva interaction in dental implants and materials for oral regeneration. Dental implants, bone substitutes and membranes in dentistry possess different properties focused on improving the healing process when in contact with oral tissues. The early saliva interaction was shown to impair some positive features present in biomaterials related to quick cellular adhesion and proliferation, such as surface hydrophilicity, cellular viability and antibacterial properties. Moreover, biomaterials that interacted with contaminated saliva containing specific bacteria demonstrated favorable conditions for increased bacterial metabolism. Additionally, the quantity of investigations associating biomaterials with early saliva interaction is still scarce in the current literature and requires clarification to prevent clinical failures. Therefore, clinically, controlling saliva exposure to sites involving the application of biomaterials must be prioritized in order to reduce impairment in important biomaterial properties developed for rapid healing.
Collapse
Affiliation(s)
- Marcel Ferreira Kunrath
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, P.O. Box 412, SE 405 30 Goteborg, Sweden;
- Department of Dentistry, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul (PUCRS), P.O. Box 6681, Porto Alegre 90619-900, RS, Brazil
| | - Christer Dahlin
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, P.O. Box 412, SE 405 30 Goteborg, Sweden;
| |
Collapse
|
6
|
Chrubasik-Hausmann S, Hellwig E, Müller M, Al-Ahmad A. Antimicrobial Photodynamic Treatment with Mother Juices and Their Single Compounds as Photosensitizers. Nutrients 2021; 13:nu13030710. [PMID: 33668205 PMCID: PMC7995975 DOI: 10.3390/nu13030710] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/12/2021] [Accepted: 02/19/2021] [Indexed: 01/09/2023] Open
Abstract
The potent antimicrobial effects of antimicrobial photodynamic therapy (aPDT) with visible light plus water-filtered infrared-A irradiation and natural compounds as photosensitizers (PSs) have recently been demonstrated. The aim of this study was to obtain information on the antimicrobial effects of aPDT with mother juices against typical cariogenic oral Streptococcus pathogens in their planktonic form and determine its eradication potential on total human salivary bacteria from volunteers. Mother juices of pomegranate, bilberry, and chokeberry at different concentrations were used as PSs. The unweighted (absolute) irradiance was 200 mW cm−2, applied five minutes. Planktonic cultures of Streptococcus mutans and Streptococcus sobrinus and total mixed bacteria from pooled saliva of volunteers were treated with aPDT. Up to more than 5 log10 of S. mutans and S. sobrinus were killed by aPDT with 0.4% and 0.8% pomegranate juice, 3% and 50% chokeberry juice, and 12.5% bilberry juice (both strains). Concentrations of at least 25% (pomegranate) and >50% (chokeberry and bilberry) eradicated the mixed bacteria in saliva samples. This pilot study has shown that pomegranate mother juice is superior to the berry juices as a multicomponent PS for killing pathogenic oral bacteria with aPDT.
Collapse
Affiliation(s)
- Sigrun Chrubasik-Hausmann
- Institute of Forensic Medicine, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany;
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany;
| | - Michael Müller
- Institute of Pharmaceutical Sciences, Pharmaceutical and Medicinal Chemistry, University of Freiburg, 79104 Freiburg, Germany;
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany;
- Correspondence: ; Tel.: +49-761-270-48940
| |
Collapse
|
7
|
Ye Z, Zhu X, Mutreja I, Boda SK, Fischer NG, Zhang A, Lui C, Qi Y, Aparicio C. Biomimetic mineralized hybrid scaffolds with antimicrobial peptides. Bioact Mater 2021; 6:2250-2260. [PMID: 33553813 PMCID: PMC7829078 DOI: 10.1016/j.bioactmat.2020.12.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/15/2020] [Accepted: 12/31/2020] [Indexed: 12/12/2022] Open
Abstract
Infection in hard tissue regeneration is a clinically-relevant challenge. Development of scaffolds with dual function for promoting bone/dental tissue growth and preventing bacterial infections is a critical need in the field. Here we fabricated hybrid scaffolds by intrafibrillar-mineralization of collagen using a biomimetic process and subsequently coating the scaffold with an antimicrobial designer peptide with cationic and amphipathic properties. The highly hydrophilic mineralized collagen scaffolds provided an ideal substrate to form a dense and stable coating of the antimicrobial peptides. The amount of hydroxyapatite in the mineralized fibers modulated the rheological behavior of the scaffolds with no influence on the amount of recruited peptides and the resulting increase in hydrophobicity. The developed scaffolds were potent by contact killing of Gram-negative Escherichia coli and Gram-positive Streptococcus gordonii as well as cytocompatible to human bone marrow-derived mesenchymal stromal cells. The process of scaffold fabrication is versatile and can be used to control mineral load and/or intrafibrillar-mineralized scaffolds made of other biopolymers. A biomimetic intrafibrillar-mineralized scaffold was prepared using a non-classical pathway for mineralization. The mineralized scaffold was stably coated with designer antimicrobial peptide GL13K. The hybrid scaffold was cytocompatible and potent against biofilms of model Gram-positive and Gram-negative bacteria. The mineral content affected the rheological properties of the scaffolds, but not the loading of antimicrobial peptides.
Collapse
Affiliation(s)
- Zhou Ye
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Xiao Zhu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine Ministry of Education, School of Stomatology, Wuhan University, Wuhan, 430079, China
| | - Isha Mutreja
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Sunil Kumar Boda
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Nicholas G Fischer
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Anqi Zhang
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Christine Lui
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| | - Yipin Qi
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510000, China
| | - Conrado Aparicio
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, MN, 55455, USA
| |
Collapse
|
8
|
|
9
|
High Potential of Bacterial Adhesion on Block Bone Graft Materials. MATERIALS 2020; 13:ma13092102. [PMID: 32370084 PMCID: PMC7254222 DOI: 10.3390/ma13092102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/25/2020] [Accepted: 04/27/2020] [Indexed: 12/15/2022]
Abstract
Bone graft infections represent a challenge in daily clinics, resulting in increased patient discomfort and graft removal. The aim of this study was to investigate the initial adhesion of five representative pathogens on three different block bone graft materials (xenogeneic, alloplastic and allogeneic) and to assess if chlorhexidine (CHX) can effectively control the initial bacterial adhesion. Three different block bone grafting materials (Tutobone®, Endobon® and human spongiosa) were incubated with Escherichia coli, Staphylococcus aureus, Streptococcus mutans, Enterococcus faecalis and Pseudomonas aeruginosa in the presence or absence of 0.2% CHX solution. Bacterial adhesion was assessed by the direct counting of the colony-forming units (CFUs) and visualized by scanning electron microscopy (SEM). Overall, the selected bacterial species adhered successfully to all tested bone replacement scaffolds, which showed similar bacterial counts. The lg CFU values ranged from 5.29 ± 0.14 to 5.48 ± 0.72 for E. coli, from 4.37 ± 0.62 to 5.02 ± 0.48 for S. aureus, from 4.92 ± 0.34 to 4.95 ± 0.21 for S. mutans, from 4.97 ± 0.40 to 5.22 ± 0.13 for E. faecalis and from 4.23 ± 0.54 to 4.58 ± 0.26 for P. aeruginosa. CHX did not interfere with initial microbial adhesion, and yet it killed all adhered bacterial cells. Thus, CHX can be used to prevent subsequent biofilm infections.
Collapse
|
10
|
Vollmer A, Al-Ahmad A, Argyropoulou A, Thurnheer T, Hellwig E, Attin T, Vach K, Wittmer A, Ferguson K, Skaltsounis AL, Karygianni L. Antimicrobial Photoinactivation Using Visible Light Plus Water-Filtered Infrared-A (VIS + wIRA) and Hypericum Perforatum Modifies In Situ Oral Biofilms. Sci Rep 2019; 9:20325. [PMID: 31889168 PMCID: PMC6937260 DOI: 10.1038/s41598-019-56925-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 12/19/2019] [Indexed: 12/24/2022] Open
Abstract
Due to increasing antibiotic resistance, the application of antimicrobial photodynamic therapy (aPDT) is gaining increasing popularity in dentistry. The aim of this study was to investigate the antimicrobial effects of aPDT using visible light (VIS) and water-filtered infrared-A (wIRA) in combination with a Hypericum perforatum extract on in situ oral biofilms. The chemical composition of H. perforatum extract was analyzed using ultra-high-performance liquid chromatography coupled with high resolution mass spectrometry (UPLC-HRMS). To obtain initial and mature oral biofilms in situ, intraoral devices with fixed bovine enamel slabs (BES) were carried by six healthy volunteers for two hours and three days, respectively. The ex situ exposure of biofilms to VIS + wIRA (200 mWcm-2) and H. perforatum (32 mg ml-1, non-rinsed or rinsed prior to aPDT after 2-min preincubation) lasted for five minutes. Biofilm treatment with 0.2% chlorhexidine gluconate solution (CHX) served as a positive control, while untreated biofilms served as a negative control. The colony-forming units (CFU) of the aPDT-treated biofilms were quantified, and the surviving microorganisms were identified using MALDI-TOF biochemical tests as well as 16 S rDNA-sequencing. We could show that the H. perforatum extract had significant photoactivation potential at a concentration of 32 mg ml-1. When aPDT was carried out in the presence of H. perforatum, all biofilms (100%) were completely eradicated (p = 0.0001). When H. perforatum was rinsed off prior to aPDT, more than 92% of the initial viable bacterial count and 13% of the mature oral biofilm were killed. Overall, the microbial composition in initial and mature biofilms was substantially altered after aPDT, inducing a shift in the synthesis of the microbial community. In conclusion, H. perforatum-mediated aPDT using VIS + wIRA interferes with oral biofilms, resulting in their elimination or the substantial alteration of microbial diversity and richness. The present results support the evaluation of H. perforatum-mediated aPDT for the adjunctive treatment of biofilm-associated oral diseases.
Collapse
Affiliation(s)
- Andreas Vollmer
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Aikaterini Argyropoulou
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Thomas Thurnheer
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Thomas Attin
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Kirstin Vach
- Institute for Medical Biometry and Statistics, Center for Medical Biometry and Medical Informatics, Albert-Ludwigs-University, Freiburg, Germany
| | - Annette Wittmer
- Institute of Medical Microbiology and Hygiene, Albert-Ludwigs-University, Freiburg, Germany
| | - Kerry Ferguson
- Botanical Innovation, Unit 2, 390 Clergate Road, Orange, NSW, 2800, Australia
| | - Alexios Leandros Skaltsounis
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Lamprini Karygianni
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
11
|
Gutierrez E, Burdiles PA, Quero F, Palma P, Olate-Moya F, Palza H. 3D Printing of Antimicrobial Alginate/Bacterial-Cellulose Composite Hydrogels by Incorporating Copper Nanostructures. ACS Biomater Sci Eng 2019; 5:6290-6299. [DOI: 10.1021/acsbiomaterials.9b01048] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | | | - Patricia Palma
- Laboratorio de Microbiología Oral, Área Péptidos y Compuestos Antimicrobianos, Facultad de Odontología, Universidad de Chile, Olivos 943, 8380544 Independencia, Chile
| | | | | |
Collapse
|
12
|
Doll PW, Wolf M, Guttmann M, Thelen R, Ahrens R, Spindler B, Guber AE, Al-Ahmad A. Initial Bacterial Adhesion Properties of Anodically Oxidized Ti 6Al 4V. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2019; 2019:6476-6480. [PMID: 31947325 DOI: 10.1109/embc.2019.8857956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This paper reports about the initial interaction of bacteria with anodically oxidized Ti6Al4V for the use as dental implant abutment surfaces. Ti6Al4V samples are anodically oxidized in hydrofluoric acid using different voltages. The resulting nanotopographies are characterized by atomic force microscopy, scanning electron microscopy and contact angle measurements. The topographies reach from micro-porous structures with small nanoporosities on top to fully hexagonally aligned nanotubes. For initial bacterial adhesion tests, Escherichia coli and Staphylococcus aureus are used. Samples are incubated for 2 h and afterwards non-adherent cells are washed off. The results of live/dead staining and cell counts are presented. Gram-negative and Gram-positive strains show different behavior in respect to total number of initially adherent cells on different micro/nanotopographies. The observed reduction of adhered microorganisms is mainly based on underlying microporous topographies.
Collapse
|
13
|
Ligon SC, Liska R, Stampfl J, Gurr M, Mülhaupt R. Polymers for 3D Printing and Customized Additive Manufacturing. Chem Rev 2017; 117:10212-10290. [PMID: 28756658 PMCID: PMC5553103 DOI: 10.1021/acs.chemrev.7b00074] [Citation(s) in RCA: 1176] [Impact Index Per Article: 168.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Indexed: 02/06/2023]
Abstract
Additive manufacturing (AM) alias 3D printing translates computer-aided design (CAD) virtual 3D models into physical objects. By digital slicing of CAD, 3D scan, or tomography data, AM builds objects layer by layer without the need for molds or machining. AM enables decentralized fabrication of customized objects on demand by exploiting digital information storage and retrieval via the Internet. The ongoing transition from rapid prototyping to rapid manufacturing prompts new challenges for mechanical engineers and materials scientists alike. Because polymers are by far the most utilized class of materials for AM, this Review focuses on polymer processing and the development of polymers and advanced polymer systems specifically for AM. AM techniques covered include vat photopolymerization (stereolithography), powder bed fusion (SLS), material and binder jetting (inkjet and aerosol 3D printing), sheet lamination (LOM), extrusion (FDM, 3D dispensing, 3D fiber deposition, and 3D plotting), and 3D bioprinting. The range of polymers used in AM encompasses thermoplastics, thermosets, elastomers, hydrogels, functional polymers, polymer blends, composites, and biological systems. Aspects of polymer design, additives, and processing parameters as they relate to enhancing build speed and improving accuracy, functionality, surface finish, stability, mechanical properties, and porosity are addressed. Selected applications demonstrate how polymer-based AM is being exploited in lightweight engineering, architecture, food processing, optics, energy technology, dentistry, drug delivery, and personalized medicine. Unparalleled by metals and ceramics, polymer-based AM plays a key role in the emerging AM of advanced multifunctional and multimaterial systems including living biological systems as well as life-like synthetic systems.
Collapse
Affiliation(s)
- Samuel Clark Ligon
- Laboratory
for High Performance Ceramics, Empa, The
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf CH-8600, Switzerland
- Institute of Applied
Synthetic Chemistry and Institute of Materials Science and
Technology, TU Wien, Getreidemarkt 9, Vienna A-1060, Austria
| | - Robert Liska
- Institute of Applied
Synthetic Chemistry and Institute of Materials Science and
Technology, TU Wien, Getreidemarkt 9, Vienna A-1060, Austria
| | - Jürgen Stampfl
- Institute of Applied
Synthetic Chemistry and Institute of Materials Science and
Technology, TU Wien, Getreidemarkt 9, Vienna A-1060, Austria
| | - Matthias Gurr
- H.
B. Fuller Deutschland GmbH, An der Roten Bleiche 2-3, Lüneburg D-21335, Germany
| | - Rolf Mülhaupt
- Freiburg
Materials Research Center (FMF) and Institute for Macromolecular Chemistry, Albert-Ludwigs-University Freiburg, Stefan-Meier-Straße 31, Freiburg D-79104, Germany
| |
Collapse
|
14
|
Ligon SC, Liska R, Stampfl J, Gurr M, Mülhaupt R. Polymers for 3D Printing and Customized Additive Manufacturing. Chem Rev 2017. [DOI: 10.1021/acs.chemrev.7b00074 impact factor 2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Samuel Clark Ligon
- Laboratory
for High Performance Ceramics, Empa, The Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf CH-8600, Switzerland
| | | | | | - Matthias Gurr
- H. B. Fuller Deutschland GmbH, An der Roten Bleiche 2-3, Lüneburg D-21335, Germany
| | - Rolf Mülhaupt
- Freiburg
Materials Research Center (FMF) and Institute for Macromolecular Chemistry, Albert-Ludwigs-University Freiburg, Stefan-Meier-Straße 31, Freiburg D-79104, Germany
| |
Collapse
|
15
|
Bioprinting a cardiac valve. Biotechnol Adv 2015; 33:1503-21. [DOI: 10.1016/j.biotechadv.2015.07.006] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 06/30/2015] [Accepted: 07/27/2015] [Indexed: 12/13/2022]
|
16
|
Schienle S, Al-Ahmad A, Kohal RJ, Bernsmann F, Adolfsson E, Montanaro L, Palmero P, Fürderer T, Chevalier J, Hellwig E, Karygianni L. Microbial adhesion on novel yttria-stabilized tetragonal zirconia (Y-TZP) implant surfaces with nitrogen-doped hydrogenated amorphous carbon (a-C:H:N) coatings. Clin Oral Investig 2015; 20:1719-32. [DOI: 10.1007/s00784-015-1655-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/09/2015] [Indexed: 12/14/2022]
|
17
|
Quintas V, Prada-López I, Donos N, Suárez-Quintanilla D, Tomás I. Antiplaque effect of essential oils and 0.2% chlorhexidine on an in situ model of oral biofilm growth: a randomised clinical trial. PLoS One 2015; 10:e0117177. [PMID: 25689859 PMCID: PMC4331278 DOI: 10.1371/journal.pone.0117177] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate the in situ antiplaque effect after 4 days of using of 2 commercial antimicrobial agents in short term on undisturbed plaque-like biofilm. TRIAL DESIGN AND PARTICIPANTS An observer-masked, crossover randomised clinical trial on 15 oral and systemically healthy volunteers between 20-30 years who were randomly and sequentially allocated in the same group which performed 3 interventions in different randomised sequences. INTERVENTION The participants wore an appliance in 3 different rinsing periods doing mouthwashes twice a day (1/0/1) with essential oils, 0.2% chlorhexidine or sterile water (negative control). At the end of each 4-day mouthwash period, samples were removed from the appliance. Posteriorly, after bacterial vital staining, samples were analysed using a Confocal Laser Scanning Microscope. MAIN OUTCOME MEASURES Bacterial vitality, thickness and covering grade by the biofilm after 4 days of applying each of the mouthwashes. RESULTS The essential oils and the 0.2% chlorhexidine were significantly more effective than the sterile water at reducing bacterial vitality, thickness and covering grade by the biofilm. No significant differences were found between the 0.2% chlorhexidine and the essential oils at reducing the bacterial vitality (13.2% vs. 14.7%). However, the 0.2% chlorhexidine showed more reduction than the essential oils in thickness (6.5 μm vs. 10.0 μm; p<0.05) and covering grade by the biofilm (20.0% vs. 54.3%; p<0.001). CONCLUSION The essential oils and 0.2% chlorhexidine showed a high antiplaque effect. Although the 0.2% chlorhexidine showed better results with regard to reducing the thickness and covering grade by the biofilm, both antiseptics showed a high and similar antibacterial activity. CLINICAL RELEVANCE Daily essential oils or 0.2% chlorhexidine mouthwashes are effective when reducing dental plaque formation in the short term. Although 0.2% chlorhexidine continues to be the "gold standard" in terms of antiplaque effect, essential oils could be considered a reliable alternative. TRIAL REGISTRATION ClinicalTrials.gov NCT02124655.
Collapse
Affiliation(s)
- Víctor Quintas
- Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Isabel Prada-López
- Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Nikolaos Donos
- Periodontology Unit, UCL Eastman Dental Institute, London, United Kingdom
| | - David Suárez-Quintanilla
- Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Inmaculada Tomás
- Oral Sciences Research Group, School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela, Spain
| |
Collapse
|
18
|
Current Uses of Poly(lactic-co-glycolic acid) in the Dental Field: A Comprehensive Review. J CHEM-NY 2015. [DOI: 10.1155/2015/525832] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Poly(lactic-co-glycolic acid) or PLGA is a biodegradable polymer used in a wide range of medical applications. Specifically PLGA materials are also developed for the dental field in the form of scaffolds, films, membranes, microparticles, or nanoparticles. PLGA membranes have been studied with promising results, either alone or combined with other materials in bone healing procedures. PLGA scaffolds have been used to regenerate damaged tissues together with stem cell-based therapy. There is solid evidence that the development of PLGA microparticles and nanoparticles may be beneficial to a wide range of dental fields such as endodontic therapy, dental caries, dental surgery, dental implants, or periodontology. The aim of the current paper was to review the recent advances in PLGA materials and their potential uses in the dental field.
Collapse
|
19
|
Lin HY, Wang HW. The influence of operating parameters on the drug release and antibacterial performances of alginate fibrous dressings prepared by wet spinning. BIOMATTER 2014; 2:321-8. [PMID: 23507896 PMCID: PMC3568116 DOI: 10.4161/biom.22817] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
20
|
The influence of operating parameters on the drug release and anti-bacterial performances of alginate wound dressings prepared by three-dimensional plotting. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.07.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
21
|
Senges C, Wrbas KT, Altenburger M, Follo M, Spitzmüller B, Wittmer A, Hellwig E, Al-Ahmad A. Bacterial and Candida albicans adhesion on different root canal filling materials and sealers. J Endod 2011; 37:1247-52. [PMID: 21846541 DOI: 10.1016/j.joen.2011.05.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 05/27/2011] [Accepted: 05/31/2011] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Microbial adhesion and subsequent biofilm formation on endodontic root canal filling materials and sealers lead to survival of microorganisms in treated root canals and subsequently to endodontic treatment failures. The present study focused on initial microbial adhesion to different endodontic filling materials. METHODS The following endodontic biomaterials were tested: AH-Plus, Tubli Seal, gutta-percha, Real Seal SE, EndoREZ, Apexit Plus, GuttaFlow, and dentin. Samples of each material were prepared. Bovine dentin samples were used as a control. The initial adhesions of salivary bacteria as well as the subsequent single species were quantified by determination of colony-forming units (CFUs) and visualized by scanning electron microscopy and confocal microscopy (CLSM): Enterococcus faecalis, Streptococcus mutans, Streptococcus sanguis, Candida albicans, and Prevotella nigrescens. RESULTS Initially adherent microorganisms could be detected and microscopically visualized on each of the materials tested. Considering the values of the CFUs and the covering grade as detected by CLSM, there were significant differences among the materials. Fewer bacteria tended to adhere to Apexit Plus, whereas Real Seal SE and the widely used gutta-percha showed the highest number of adherent bacteria. This tendency was not detected for C. albicans. CONCLUSIONS Endodontic microorganisms have a high affinity to root canal filling materials and sealers, especially to gutta-percha. Because of this high level of bacterial adhesion, subsequent biofilm formation on these materials could be suggested as leading to the persistence of microorganisms in root canals.
Collapse
Affiliation(s)
- Christian Senges
- Department of Operative Dentistry and Periodontology, Albert-Ludwigs-University, Freiburg, Germany
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Al-Ahmad A, Schubert C, Carvalho C, Thoman Y, Wittmer A, Metzger M, Hellwig E, Swieszkowski W, Wiedmann-Al-Ahmad M. Comparison of bacterial adhesion and cellular proliferation on newly developed three-dimensional scaffolds manufactured by rapid prototyping technology. J Biomed Mater Res A 2011; 98:303-11. [PMID: 21626662 DOI: 10.1002/jbm.a.33118] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 02/07/2011] [Accepted: 03/25/2011] [Indexed: 11/10/2022]
Abstract
Scaffolds used in the field of tissue engineering should facilitate the adherence, spreading, and ingrowth of cells as well as prevent microbial adherence. For the first time, this study simultaneously deals with microbial and tissue cell adhesion to rapid prototyping-produced 3D-scaffolds. The cell growth of human osteosarcoma cells (CAL-72) over a time period of 3-11 days were examined on three scaffolds (PLGA, PLLA, PLLA-TCP) and compared to the adhesion of salivary microorganisms and representative germs of the oral flora (Porphyromonas gingivalis, Prevotella nigrescens, Candida albicans, Enterococcus faecalis, Streptococcus mutans, and Streptococcus sanguinis). Scanning electron microscopy (SEM), cell proliferation measurements, and determination of the colony forming units (CFU) were performed. The cell proliferation rates on PLLA and PLLA-TCP after 3, 7, and 11 days of cultivation were higher than on PLGA. On day 3 the proliferation rates on PLLA and PLLA-TCP, and on day 5 on PLLA-TCP, proved to be significantly higher compared to that of the control (culture plate). The strain which showed the most CFUs on all of the investigated scaffolds was P. gingivalis, followed by E. faecalis. No significant CFU differences were determined examining P. gingivalis among the biomaterials. In contrast, E. faecalis was significantly more adherent to PLGA and PLLA compared to PLLA-TCP. The lowest CFU values were seen with C. albicans and P. nigrescens. Salivary born aerobic and anaerobic microorganisms adhered significantly more to PLGA compared to PLLA-TCP. These results supported by SEM point out the high potential of PLLA-TCP in the field of tissue engineering.
Collapse
Affiliation(s)
- A Al-Ahmad
- Department of Operative Dentistry and Periodontology, Albert Ludwigs University, Freiburg, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
|
24
|
Hannig C, Follo M, Hellwig E, Al-Ahmad A. Visualization of adherent micro-organisms using different techniques. J Med Microbiol 2010; 59:1-7. [PMID: 19815663 DOI: 10.1099/jmm.0.015420-0] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The visualization and quantification of adherent bacteria is still one of the most relevant topics in microbiology. Besides electron microscopic techniques such as transmission electron microscopy, scanning electron microscopy and environmental scanning electron microscopy, modern fluorescence microscopic approaches based on fluorogenic dyes offer detailed insight into bacterial biofilms. The aim of the present review was to provide an overview of the advantages and disadvantages of different methods for visualization of adherent bacteria with a special focus on the experiences gained in dental research.
Collapse
Affiliation(s)
- Christian Hannig
- Department of Operative Dentistry and Periodontology, University of Freiburg, Hugstetter Str. 55, D-79106 Freiburg, Germany
| | - Marie Follo
- Department of Hematology and Oncology, Core Facility, Albert-Ludwig University, Freiburg, Germany
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, University of Freiburg, Hugstetter Str. 55, D-79106 Freiburg, Germany
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, University of Freiburg, Hugstetter Str. 55, D-79106 Freiburg, Germany
| |
Collapse
|
25
|
Valutazione dell’uso di un biomateriale nel trattamento dei difetti parodontali infraossei. ITALIAN ORAL SURGERY 2009. [DOI: 10.1016/j.ios.2009.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
26
|
|