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Chen J, Guo J, Lu X, Yin D, Zhou C, Li Y, Zhou X. Microbiome-friendly PS/PVP electrospun fibrous membrane with antibiofilm properties for dental engineering. Regen Biomater 2024; 11:rbae011. [PMID: 38414799 PMCID: PMC10898674 DOI: 10.1093/rb/rbae011] [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: 09/22/2023] [Revised: 01/20/2024] [Accepted: 01/27/2024] [Indexed: 02/29/2024] Open
Abstract
Dental caries is one of the most prevalent and biofilm-associated oral diseases in humans. Streptococcus mutans, with a high ability to form biofilms by adhering to hard surfaces, has been established as an important etiological agent for dental caries. Therefore, it is crucial to find a way to prevent the formation of cariogenic biofilm. Here, we report an electrospun fibrous membrane that could inhibit the adhesion and biofilm formation of S. mutans. Also, the polystyrene (PS)/polyvinyl pyrrolidone (PVP) electrospun fibrous membrane altered the 3D biofilm architecture and decreased water-insoluble extracellular polysaccharide production. Notably, the anti-adhesion mechanism which laid in Coulomb repulsion between the negatively charged PS/PVP electrospun fibrous membrane and S. mutans was detected by zeta potential. Furthermore, metagenomics sequencing analysis and CCK-8 assay indicated that PS/PVP electrospun fibrous membrane was microbiome-friendly and displayed no influence on the cell viability of human gingival epithelial cells and human oral keratinocytes. Moreover, an in vitro simulation experiment demonstrated that PS/PVP electrospun fibrous membrane could decrease colony-forming unit counts of S. mutans effectively, and PS/PVP electrospun fibrous membrane carrying calcium fluoride displayed better anti-adhesion ability than that of PS/PVP electrospun fibrous membrane alone. Collectively, this research showed that the PS/PVP electrospun fibrous membrane has potential applications in controlling and preventing dental caries.
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Affiliation(s)
- Jiamin Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Jia Guo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
- Stomatological Hospital affiliated Suzhou Vocational Health College, Department of Operative Dentistry and Endodontics, Suzhou, 215000, China
| | - Xueyun Lu
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Derong Yin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Cuisong Zhou
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Yuqing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
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Mokeem LS, Martini Garcia I, Balhaddad AA, Lan Y, Seifu D, Weir MD, Melo MA. Multifunctional Dental Adhesives Formulated with Silane-Coated Magnetic Fe 3O 4@m-SiO 2 Core-Shell Particles to Counteract Adhesive Interfacial Breakdown. ACS APPLIED MATERIALS & INTERFACES 2024; 16:2120-2139. [PMID: 38170561 DOI: 10.1021/acsami.3c15157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The process of bonding to dentin is complex and dynamic, greatly impacting the longevity of dental restorations. The tooth/dental material interface is degraded by bacterial acids, matrix metalloproteinases (MMPs), and hydrolysis. As a result, bonded dental restorations face reduced longevity due to adhesive interfacial breakdown, leading to leakage, tooth pain, recurrent caries, and costly restoration replacements. To address this issue, we synthesized and characterized a multifunctional magnetic platform, CHX@SiQuac@Fe3O4@m-SiO2, to provide several beneficial functions. The platform comprises Fe3O4 microparticles and chlorhexidine (CHX) encapsulated within mesoporous silica, which was silanized by an antibacterial quaternary ammonium silane (SiQuac). This platform simultaneously targets bacterial inhibition, stability of the hybrid layer, and enhanced filler infiltration by magnetic motion. Comprehensive experiments include X-ray diffraction, FT-IR, VSM, EDS, N2 adsorption-desorption (BET), transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, and UV-vis spectroscopy. Then, CHX@SiQuac@Fe3O4@m-SiO2 was incorporated into an experimental adhesive resin for dental bonding restorations, followed by immediate and long-term antibacterial assessment, cytotoxicity evaluation, and mechanical and bonding performance. The results confirmed the multifunctional nature of CHX@SiQuac@Fe3O4@m-SiO2. This work outlined a roadmap for (1) designing and tuning an adhesive formulation containing the new platform CHX@SiQuac@Fe3O4@m-SiO2; (2) assessing microtensile bond strength to dentin using a clinically relevant model of simulated hydrostatic pulpal pressure; and (3) investigating the antibacterial outcome performance of the particles when embedded into the formulated adhesives over time. The results showed that at 4 wt % of CHX@SiQuac@Fe3O4@m-SiO2-doped adhesive under the guided magnetic field, the bond strength increased by 28%. CHX@SiQuac@Fe3O4@m-SiO2 enhanced dentin adhesion in the magnetic guide bonding process without altering adhesive properties or causing cytotoxicity. This finding presents a promising method for strengthening the tooth/dental material interface's stability and extending the bonded restorations' lifespan.
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Affiliation(s)
- Lamia Sami Mokeem
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Isadora Martini Garcia
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
- Division of Cariology and Operative Dentistry, Department of Comprehensive Dentistry, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Abdulrahman A Balhaddad
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Yucheng Lan
- Department of Physics and Engineering Physics, Morgan State University, Baltimore, Maryland 21251, United States
| | - Dereje Seifu
- Department of Physics and Engineering Physics, Morgan State University, Baltimore, Maryland 21251, United States
| | - Michael D Weir
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
- Division of Biomaterials and Tissue Engineering, Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Mary Anne Melo
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
- Division of Cariology and Operative Dentistry, Department of Comprehensive Dentistry, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
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Garcia IM, Assad-Loss TF, Schneider LFJ, Collares FM, Cavalcante LMA, Tostes MA. Cytotoxicity evaluation, antibacterial effect, and degree of conversion of QAM-containing adhesives. Braz Oral Res 2024; 38:e001. [PMID: 38198301 DOI: 10.1590/1807-3107bor-2024.vol38.0001] [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: 05/05/2021] [Accepted: 12/01/2021] [Indexed: 01/12/2024] Open
Abstract
The aim of this study was to evaluate the influence of adding quaternary ammonium methacrylates (QAMs) to experimental adhesives by assessing the degree of conversion (DC), cytotoxicity against keratinocytes and fibroblasts, and antibacterial activity against biofilm formation. Two QAMs were added to an experimental adhesive: dimethylaminododecyl methacrylate bromododecane (DMADDM) or dimethylaminododecyl methacrylate bromohexadecane (DMAHDM) at three concentrations each: 1, 2.5, and 5 wt.%. Experimental adhesive without QAMs (control group) and commercially available Transbond XT Primer (3M Unitek, Monrovia, California, USA) were used for comparisons. The adhesives were tested for DC, cytotoxicity against keratinocytes and fibroblasts, and antibacterial activity against biofilm formation. DC, cytotoxicity against fibroblasts, and antibacterial activity were analyzed using one-way ANOVA and Tukey's multiple comparisons. Cytotoxicity against keratinocytes was evaluated using the Kruskal Wallis and Dunn's post-hoc (α = 5%) tests. Transbond showed lower DC as compared to 5% DMAHDM, 1% DMADDM, and 5% DMADDM (p < 0.05). However, all groups presented proper DC when compared to commercial adhesives in the literature. In the evaluation of cytotoxicity against keratinocytes, Transbond induced higher viability than 2.5 wt.% groups (p < 0.05). Against fibroblasts, Transbond induced higher viability as compared to 5 wt.% groups (p < 0.05). DMAHDM at 5 wt.% reduced biofilm formation when compared to all the other groups (p < 0.05). Despite their cytotoxic effect against keratinocytes, gingival fibroblasts showed higher viability. DMAHDM at 5 wt.% decreased Streptococcus mutans viability. The incorporation of DMAHDM at 5 wt.% may be a strategy for reducing the development of white spot lesions.
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Affiliation(s)
- Isadora Martini Garcia
- University of Maryland School of Dentistry, Department of General Dentistry, Baltimore, MD, USA
| | - Tatiana Féres Assad-Loss
- Universidade Federal Fluminense - UFF, School of Dentistry, Graduate Program in Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
| | - Luis Felipe Jochinms Schneider
- Universidade Federal Fluminense - UFF, School of Dentistry, Graduate Program in Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
| | - Fabrício Mezzomo Collares
- Universidade Federal do Rio Grande do Sul - UFRGS, School of Dentistry, Laboratory of Dental Materials, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Larissa Maria Assad Cavalcante
- Universidade Federal Fluminense - UFF, School of Dentistry, Graduate Program in Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
| | - Mônica Almeida Tostes
- Universidade Federal Fluminense - UFF, School of Dentistry, Graduate Program in Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
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Tebyaniyan H, Hussain A, Vivian M. Current antibacterial agents in dental bonding systems: a comprehensive overview. Future Microbiol 2023; 18:825-844. [PMID: 37668450 DOI: 10.2217/fmb-2022-0203] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023] Open
Abstract
Dental caries is mainly caused by oral biofilm acid, and the most common dental restoration treatment is composite dental restorations. The main cause of failure is secondary caries adjacent to the restoration. Long-term survival of dental materials is improved by the presence of antibacterial agents, which selectively inhibit bacterial growth or survival. Chemical, natural and biomaterials have been studied for their antimicrobial activities and antibacterial bonding agents have been improved. Their usage has been increased to inhibit the growth of invading and residual bacteria in the oral cavity, as biofilm accumulation increases the risk of treatment failure. In this article, the success and applications of antibacterial agents are discussed in dental bonding systems.
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Affiliation(s)
- Hamid Tebyaniyan
- Department of Science & Research, Islimic Azade University, Tehran, Iran
| | - Ahmed Hussain
- School of Dentistry, Edmonton Clinic Health Academy, University of Alberta, AB, T6G 1C9, Canada
| | - Mark Vivian
- College of Dentistry, University of Saskatchewan, Saskatoon, SK, S7N 5E4, Canada
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Hollanders ACC, Kuper NK, Bronkhorst EM, Laske M, Huysmans MCDNJM. Effectiveness of adhesive containing MDPB: A practice-based clinical trial. Dent Mater 2023; 39:756. [PMID: 37394389 DOI: 10.1016/j.dental.2023.06.011] [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: 11/14/2022] [Revised: 06/05/2023] [Accepted: 06/14/2023] [Indexed: 07/04/2023]
Abstract
OBJECTIVES This prospective practice-based trial assessed the longevity of composite restorations made with an adhesive containing an antibacterial monomer compared to a conventional adhesive. METHODS 9 general practices in the Netherlands were provided with two composite resin adhesives, each for a period of 9 months. Adhesive P contained the quaternary ammonium salt MDPB, and Adhesive S was a control. Patient's age and caries risk, as well as tooth type/number, reason for restoration placement, used restorative material and adhesive, and restored surfaces were recorded. All interventions carried out on these teeth in the 6 years after restoration were extracted from the electronic patient records, along with their date, type, reason, and surfaces. Two dependent variables were defined: general failure, and failure due to secondary caries. All data handling and multiple Cox regression analysis were carried out in R 4.0.5. RESULTS 11 dentists from 7 practices made 10,151 restorations over a period of two years in 5102 patients. 4591 restorations were made with adhesive P, whereas 5560 were made with adhesive S. The observation period was up to 6.29 years, median observation time was 3.74 years. Cox regression showed no significant difference between the two adhesive materials when corrected for age, tooth type and caries risk, for general failure nor failure due to caries. SIGNIFICANCE No difference in restoration survival could be shown between composite restorations made using an adhesive containing MDPB and control. Restorations made with the adhesive containing MDPB also did not fail more or less frequently due to secondary caries. This trial is registered on clinicaltrials.gov with identifier NCT05118100.
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Affiliation(s)
| | - N K Kuper
- Department of Dentistry, Radboudumc, Nijmegen, Netherlands
| | - E M Bronkhorst
- Department of Dentistry, Radboudumc, Nijmegen, Netherlands
| | - M Laske
- Department of Dentistry, Radboudumc, Nijmegen, Netherlands
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YU W, REN C, ZHANG N, CAO L, WEIR MD, YANG K, XU HHK, BAI Y. Dual function of anti-biofilm and modulating biofilm equilibrium of orthodontic cement containing quaternary ammonium salt. Dent Mater J 2023; 42:149-157. [PMID: 36464290 DOI: 10.4012/dmj.2022-142] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
The objectives of this study were to incorporate dimethylaminohexadecyl methacrylate (DMAHDM) into resin-modified glass ionomer cement (RMGI) to develop a novel orthodontic cement which endowed RMGI with strong antibacterial ability and investigated its modulation biofilm equilibrium from cariogenic state to non-cariogenic state for the first time. Cariogenic Streptococcus mutans (S. mutans), and non-cariogenic Streptococcus sanguinis (S. sanguinis) and Streptococcus gordonii (S. gordonii) were selected to form a tri-species biofilm model. RMGI incorporated with different mass fraction of DMAHDM was examined: biofilm colony-forming units, metabolic activity, live/dead staining, lactic acid and exopolysaccharides productions. TaqMan real-time polymerase chain reaction was used to determine changes of biofilm species compositions. The results showed RMGI containing 3% DMAHDM achieved strong antibacterial ability and suppressed the cariogenic species in biofilm, modulating biofilm equilibrium from cariogenic state to non-cariogenic state tendency. The novel bioactive cement containing DMAHDM is promising in fixed orthodontic treatments and protecting tooth enamel.
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Affiliation(s)
- Wenqi YU
- Department of Orthodontics, School of Stomatology, Capital Medical University
| | - Chaochao REN
- Department of Orthodontics, School of Stomatology, Capital Medical University
| | - Ning ZHANG
- Department of Orthodontics, School of Stomatology, Capital Medical University
| | - Li CAO
- Department of Orthodontics, School of Stomatology, Capital Medical University
| | - Michael D. WEIR
- Biomaterials and Tissue Engineering Division, Department of Advanced Oral Science and Therapeutics
| | - Kai YANG
- Department of Orthodontics, School of Stomatology, Capital Medical University
| | - Hockin H. K. XU
- Biomaterials and Tissue Engineering Division, Department of Advanced Oral Science and Therapeutics
| | - Yuxing BAI
- Department of Orthodontics, School of Stomatology, Capital Medical University
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Luong AD, Buzid A, Luong JHT. Important Roles and Potential Uses of Natural and Synthetic Antimicrobial Peptides (AMPs) in Oral Diseases: Cavity, Periodontal Disease, and Thrush. J Funct Biomater 2022; 13:jfb13040175. [PMID: 36278644 PMCID: PMC9589978 DOI: 10.3390/jfb13040175] [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: 09/16/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 01/10/2023] Open
Abstract
Numerous epithelial cells and sometimes leukocytes release AMPs as their first line of defense. AMPs encompass cationic histatins, defensins, and cathelicidin to encounter oral pathogens with minimal resistance. However, their concentrations are significantly below the effective levels and AMPs are unstable under physiological conditions due to proteolysis, acid hydrolysis, and salt effects. In parallel to a search for more effective AMPs from natural sources, considerable efforts have focused on synthetic stable and low-cytotoxicy AMPs with significant activities against microorganisms. Using natural AMP templates, various attempts have been used to synthesize sAMPs with different charges, hydrophobicity, chain length, amino acid sequence, and amphipathicity. Thus far, sAMPs have been designed to target Streptococcus mutans and other common oral pathogens. Apart from sAMPs with antifungal activities against Candida albicans, future endeavors should focus on sAMPs with capabilities to promote remineralization and antibacterial adhesion. Delivery systems using nanomaterials and biomolecules are promising to stabilize, reduce cytotoxicity, and improve the antimicrobial activities of AMPs against oral pathogens. Nanostructured AMPs will soon become a viable alternative to antibiotics due to their antimicrobial mechanisms, broad-spectrum antimicrobial activity, low drug residue, and ease of synthesis and modification.
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Affiliation(s)
- Albert Donald Luong
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University of Buffalo, Buffalo, NY 14215, USA
| | - Alyah Buzid
- Department of Chemistry, College of Science, King Faisal University, P.O. Box 380, Al-Ahsa 31982, Saudi Arabia
| | - John H. T. Luong
- School of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, College Road, T12 YN60 Cork, Ireland
- Correspondence: or
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Dual-functional adhesive containing amorphous calcium phosphate nanoparticles and dimethylaminohexadecyl methacrylate promoted enamel remineralization in a biofilm-challenged environment. Dent Mater 2022; 38:1518-1531. [PMID: 35907751 DOI: 10.1016/j.dental.2022.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 07/13/2022] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The cariogenic biofilm on enamel, restoration, and bonding interface is closely related to dental caries and composite restoration failure. Enamel remineralization at adhesive interface is conducive to protecting bonding interface and inhibiting secondary caries. This study intended to assess the remineralization efficiency of adhesive with dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP) on initial caries lesion of biofilm-coated enamel. METHODS Artificial initial carious lesion was created via 72-hour immersion in demineralization solution and cariogenic biofilm was formed after 24-hour culture of Streptococcus mutans (S. mutans). Specimens were then divided into 4 groups: enamel control, enamel treated with NACP, DMAHDM and NACP+DMAHDM respectively. Samples next underwent 7-day cycling, 4 h in BHIS (brain heart infusion broth containing 1 % sucrose) and 20 h in AS (artificial saliva) per day. The pH of BHIS was tested daily. So did the concentration of calcium and phosphate in BHIS and AS. Live/dead staining, colony-forming unit (CFU) count, and lactic acid production of biofilms were measured 7 days later. The enamel remineralization efficiency was evaluated by microhardness testing and transverse microradiography (TMR) quantitatively. RESULTS Enamel of NACP+DMAHDM group demonstrated excellent remineralization effectiveness. And the NACP+DMAHDM adhesive released a great number of Ca2+ and PO43- ions, increased pH to 5.81 via acid neutralization, decreased production of lactic acid, and reduced CFU count of S. mutans (P < 0.05). SIGNIFICANCE The NACP+DMAHDM adhesive would be applicable to preventing secondary caries, strengthening enamel-adhesive interface, and extending the lifespan of composite restoration.
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Evaluation of the ability of adhesives with antibacterial and remineralization functions to prevent secondary caries in vivo. Clin Oral Investig 2022; 26:3637-3650. [DOI: 10.1007/s00784-021-04334-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 12/02/2021] [Indexed: 11/03/2022]
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Al-Qarni F, Weir M, Melo MA, Al-Dulaijan Y, Almulhim KS, Xu HHK. Novel calcium phosphate ion-rechargeable and antibacterial adhesive to inhibit dental caries. Clin Oral Investig 2022; 26:313-323. [PMID: 34110495 DOI: 10.1007/s00784-021-04002-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/20/2021] [Indexed: 02/08/2023]
Abstract
OBJECTIVES This study aimed to develop an antibacterial and calcium (Ca) and phosphate (P) rechargeable adhesive and investigate the effects of dimethylaminododecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP) on dentin bonding, biofilm response, and repeated Ca and P ion recharge and re-release capability for the first time. MATERIALS AND METHODS Pyromellitic glycerol dimethacrylate (PMGDM), ethoxylated bisphenol A dimethacrylate (EBPADMA), 2-hydroxyethyl methacrylate (HEMA), and bisphenol A glycidyl dimethacrylate (BisGMA) formed the adhesive (PEHB). Three groups were tested: (1) Scotchbond (SBMP, 3 M) control, (2) PEHB + 30% NACP, and (3) PEHB + 30% NACP + 5% DMAHDM. Specimens were tested for dentin shear bond strength, and Ca and P ion release, recharge, and re-release. Biofilm lactic acid production and colony-forming units (CFU) on resins were analyzed. RESULTS The four groups had similar dentin shear bond strengths (p > 0.1). Adhesive with DMAHDM showed significant decrease in metabolic activity, lactic acid production, and biofilm CFU (p < 0.05). The adhesives containing NACP released high levels of Ca and P ions initially and after being recharged. CONCLUSION This study developed the first Ca and P ion-rechargeable and antibacterial adhesive, achieving strong antibacterial activity and Ca and P ion recharge and re-release for long-term remineralization. CLINICAL RELEVANCE Considering the restoration-tooth bonded interface being the weak link and recurrent caries at the margins being the primary reason for restoration failures, this novel calcium phosphate-rechargeable and antibacterial adhesive is promising for a wide range of tooth-restoration applications to inhibit caries.
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Affiliation(s)
- Faisal Al-Qarni
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Michael Weir
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - Mary A Melo
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - Yousif Al-Dulaijan
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Khalid S Almulhim
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
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国 嘉, 陈 佳, 李 雨, 周 学. [Study on the Effect of Polystyrene-Polyvinylpyrrolidone Electrospun Fibre in Inhibiting the Adhesion of Porphyromonas gingivalis]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2021; 52:754-758. [PMID: 34622588 PMCID: PMC10408877 DOI: 10.12182/20210960102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To explore the effect of polystyrene (PS) and PS-polyvinylpyrrolidone (PVP) electrospun materials on the adhesion ability of Porphyromonas gingivalis( P. gingivalis), a common periodontal pathogen. METHODS PS and PS-PVP electrospun materials were prepared with stainless steel needles in high-voltage electric field. The growth and adhesion of P. gingivalis on the surface of different materials were observed with scanning electron microscope (SEM). The changes in the amount of P. gingivalis biofilm formed on the surface of different materials were measured according to viable colony forming units (CFU). The effect of surface charge of the different materials on the adhesion ability of P. gingivalis was determined through changing the charge properties on the surface of the electrospun materials. RESULTS SEM images showed that both PS and PS-PVP can be used to form electrospun fibers with a diameter of 0.2 μm. SEM images and CFU counts of the biofilm at 24 h and 48 h showed that there was a smaller amount of P. gingivalis biofilm on the surface of the two materials ( P<0.05). After treatment with tetrabutylammonium bromide (TBAB), the surface charge of the PS-PVP electrospun material changed from being negatively charged to being positively charged, and the amount of bacterial adhesion on the surface increased significantly in comparison to that of untreated PS and PS-PVP materials ( P<0.05). CONCLUSION PS and PS-PVP electrospun materials can be used to reduce the adhesion ability of P. gingivalis on the surface of different materials, and this ability may be related to the surface charge properties of the materials.
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Affiliation(s)
- 嘉 国
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 佳敏 陈
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 雨庆 李
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - 学东 周
- 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院 (成都 610041)State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Incorporation of Arginine to Commercial Orthodontic Light-Cured Resin Cements-Physical, Adhesive, and Antibacterial Properties. MATERIALS 2021; 14:ma14164391. [PMID: 34442914 PMCID: PMC8401166 DOI: 10.3390/ma14164391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 11/30/2022]
Abstract
(1) Background: The amino acid arginine is now receiving great attention due to its potential anti-caries benefits. The purpose of this in vitro study was to evaluate the shear bond strength (SBS), ultimate tensile strength (UTS), and antimicrobial potential (CFU) of two arginine-containing orthodontic resin cements. (2) Methods: Forty bovine incisors were separated into four groups (n = 10): Orthocem, Orthocem + arginine (2.5 wt%), Transbond XT, and Transbond XT + arginine (2.5 wt%). The brackets were fixed to the flat surface of the enamel, and after 24 h the SBS was evaluated using the universal testing machine (Instron). For the UTS test, hourglass samples (n = 10) were made and tested in a mini-testing machine (OM-100, Odeme). For the antibacterial test (colony forming unit-CFU), six cement discs from each group were made and exposed to Streptococcus mutans UA159 biofilm for 7 days. The microbiological experiment was performed by serial and triplicate dilutions. The data from each test were statistically analyzed using a two-way ANOVA, followed by Tukey’s test (α = 0.05). (3) Results: The enamel SBS mean values of Transbond XT were statistically higher than those of Orthocem, both with and without arginine (p = 0.02033). There was no significant difference in the SBS mean values between the orthodontic resin cements, either with or without arginine (p = 0.29869). The UTS of the Transbond XT was statistically higher than the Orthocem, but the addition of arginine at 2.5 wt% did not influence the UTS for either resin cement. The Orthocem + arginine orthodontic resin cement was able to significantly reduce S. mutans growth, but no difference was observed for the Transbond XT (p = 0.03439). (4) Conclusion: The incorporation of arginine to commercial orthodontic resin cements may be an efficient preventive strategy to reduce bacterial growth without compromising their adhesive and mechanical properties.
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Fanfoni L, Marsich E, Turco G, Breschi L, Cadenaro M. Development of di-methacrylate quaternary ammonium monomers with antibacterial activity. Acta Biomater 2021; 129:138-147. [PMID: 34023457 DOI: 10.1016/j.actbio.2021.05.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
Nine antibacterial di-methacrylate monomers based on bis-quaternary ammonium salts (bis-QAMs) were synthesized and structurally characterized. The biological activity of the bis-QAMs was tested in terms of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) on different bacterial strains achieving promising results and, in most cases, a complete bactericidal effect using a bis-QAM concentration lower than 1 mg/mL. Two of the structures showed comparable and superior activity against S. mutans than the commercial monomer 12-methacryloyloxydodecyl pyridinium bromide (MDBP). All the bis-QAMs here described were able to inhibit S. mutans biofilm formation at a concentration equal to the MIC value. From the analysis of the obtained data, some correlation regarding the structure and the antibacterial activity of the bis-QAMs could be drawn: a flexible alkyl C12 spacer between the two quaternary ammonium moieties increased the monomer antibacterial effect in comparison to the aromatic ones; the equilibrium between hydrophobic and hydrophilic moieties was directly correlated to the bactericidal range of action; the increase of the steric hindrance of the ammonium side groups might be both advantageous or disadvantageous to the antibacterial efficacy depending on the whole monomer chemical structure. Even though the possible correlation between the monomer structures and their bacteriostatic or bactericidal effect is under investigation, the monomers exhibited low cytotoxicity on human dental pulp stem cells, confirming their promising potential in the dental materials' field. STATEMENT OF SIGNIFICANCE: The use of dental resins with antibacterial monomers might prevent the formation of secondary caries at the restoration margins. For this purpose, a series of di-methacrylate bis-quaternary ammonium monomers (QAMs) was developed. Unlike antibacterial mono-methacrylate monomers already described in the literature, the synthesized di-methacrylate monomers have the potential of acting as cross-linkers stabilizing the polymeric network and bear two quaternary ammonium groups that increase their antibacterial ability. The QAMs exert bactericidal activity on both Gram(+) and Gram(-) bacterial strains maintaining at the same time good biocompatibility with the oral environment. Some structural elements of the monomers were clearly related to high antibacterial properties, and this can help design new active structures and better understand their mechanism of action.
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14
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Balhaddad AA, Garcia IM, Mokeem L, Ibrahim MS, Collares FM, Weir MD, Xu HHK, Melo MAS. Bifunctional Composites for Biofilms Modulation on Cervical Restorations. J Dent Res 2021; 100:1063-1071. [PMID: 34167373 DOI: 10.1177/00220345211018189] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cervical composites treating root carious and noncarious cervical lesions usually extend subgingivally. The subgingival margins of composites present poor plaque control, enhanced biofilm accumulation, and cause gingival irritation. A potential material to restore such lesions should combine agents that interfere with bacterial biofilm development and respond to acidic conditions. Here, we explore the use of new bioresponsive bifunctional dental composites against mature microcosm biofilms derived from subgingival plaque samples. The designed formulations contain 2 bioactive agents: dimethylaminohexadecyl methacrylate (DMAHDM) at 3 to 5 wt.% and 20 wt.% nanosized amorphous calcium phosphate (NACP) in a base resin. Composites with no DMAHDM and NACP were used as controls. The newly formulated 5% DMAHDM-20% NACP composite was analyzed by micro-Raman spectroscopy and transmission electron microscopy. The wettability and surface-free energy were also assessed. The inhibitory effect on the in vitro biofilm growth and the 16S rRNA gene sequencing of survival bacterial colonies derived from the composites were analyzed. Whole-biofilm metabolic activity, polysaccharide production, and live/dead images of the biofilm grown over the composites complement the microbiological assays. Overall, the designed formulations had higher contact angles with water and lower surface-free energy compared to the commercial control. The DMAHDM-NACP composites significantly inhibited the growth of total microorganisms, Porphyromonas gingivalis, Prevotella intermedia/nigrescens, Aggregatibacter actinomycetemcomitans, and Fusobacterium nucleatum by 3 to 5-log (P < 0.001). For the colony isolates from control composites, the composition was typically dominated by the genera Veillonella, Fusobacterium, Streptococcus, Eikenella, and Leptotrichia, while Fusobacterium and Veillonella dominated the 5% DMAHDM-20% NACP composites. The DMAHDM-NACP composites contributed to over 80% of reduction in metabolic and polysaccharide activity. The suppression effect on plaque biofilms suggested that DMAHDM-NACP composites might be used as a bioactive material for cervical restorations. These results may propose an exciting path to prevent biofilm growth and improve dental composite restorations' life span.
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Affiliation(s)
- A A Balhaddad
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Department of Restorative Dental Sciences, Imam Abdulrahman Bin Faisal University, College of Dentistry, Dammam, Saudi Arabia
| | - I M Garcia
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Rio Branco, Porto Alegre, RS, Brazil
| | - L Mokeem
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - M S Ibrahim
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Department of Preventive Dental Sciences, Imam Abdulrahman Bin Faisal University, College of Dentistry, Dammam, Saudi Arabia
| | - F M Collares
- Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Rio Branco, Porto Alegre, RS, Brazil
| | - M D Weir
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Biomaterials & Tissue Engineering Division, Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - H H K Xu
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Biomaterials & Tissue Engineering Division, Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - M A S Melo
- Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.,Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD, USA
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Assad-Loss TF, Vignoli JF, Garcia IM, Portela MB, Schneider LFJ, Collares FM, Cavalcante LMA, Tostes MDA. Physicochemical properties and biological effects of quaternary ammonium methacrylates in an experimental adhesive resin for bonding orthodontic brackets. J Appl Oral Sci 2021; 29:e20201031. [PMID: 33950080 PMCID: PMC8092807 DOI: 10.1590/1678-7757-2020-1031] [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: 12/10/2020] [Accepted: 02/10/2021] [Indexed: 11/22/2022] Open
Abstract
METHODOLOGY Fixed orthodontic appliances may lead to biofilm accumulation around them that may increase caries risk. This study aimed to evaluate the influence of quaternary ammonium methacrylates (QAMs) on the physicochemical properties, cytotoxicity, and antibacterial activity of adhesive resins for orthodontic purposes. A base resin was prepared with a comonomer blend and photoinitiator/co-initiator system. Two different QAMs were added to the base adhesive: dimethylaminododecyl methacrylate at 5 wt.% (DMADDM) or dimethylaminohexadecyl methacrylate (DMAHDM) at 10 wt.%. The base adhesive, without QAMs, (GC) and the commercial Transbond™ XT Primer 3M (GT) were used as control. The resins were tested immediately and after six months of aging in the water regarding the antibacterial activity and shear bond strength (SBS). The antibacterial activity was tested against Streptococcus mutans via metabolic activity assay (MTT test). The groups were also tested for the degree of conversion (DC) and cytotoxicity against keratinocytes. RESULTS The resins containing QAM showed antibacterial activity compared to the commercial material by immediately reducing the metabolic activity by about 60%. However, the antibacterial activity decreased after aging (p<0.05). None of the groups presented any differences for SBS (p>0.05) and DC (p>0.05). The incorporation of DMADDM and DMAHDM significantly reduced the keratinocyte viability compared to the GT and GC groups (p<0.05). CONCLUSION Both adhesives with QAMs showed a significant reduction in bacterial metabolic activity, but this effect decreased after water aging. Lower cell viability was observed for the group with the longer alkyl chain-QAM, without significant differences for the bonding ability and degree of conversion. The addition of QAMs in adhesives may affect the keratinocytes viability, and the aging effects maybe decrease the bacterial activity of QAM-doped materials.
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Affiliation(s)
| | | | - Isadora Martini Garcia
- Universidade Federal do Rio Grande do Sul, Laboratório de Materiais Dentários, Porto Alegre, RS, Brasil
| | | | - Luis Felipe J Schneider
- Universidade Federal Fluminense, Programa de pós-graduação em Odontologia, Niterói, RJ, Brasil.,Universidade Veiga de Almeida, Pós-graduação em Odontologia, Rio de Janeiro, RJ, Brasil
| | - Fabrício Mezzomo Collares
- Universidade Federal do Rio Grande, Pós-Graduação em Odontologia da do Sul, Porto Alegre, RS, Brasil
| | - Larissa Maria Assad Cavalcante
- Universidade Federal Fluminense, Programa de pós-graduação em Odontologia, Niterói, RJ, Brasil.,Universidade Veiga de Almeida, Pós-graduação em Odontologia, Rio de Janeiro, RJ, Brasil
| | - Monica de Almeida Tostes
- Universidade Federal do Rio Grande, Pós-Graduação em Odontologia da do Sul, Porto Alegre, RS, Brasil
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Clarin A, Ho D, Soong J, Looi C, Ipe DS, Tadakamadla SK. The Antibacterial and Remineralizing Effects of Biomaterials Combined with DMAHDM Nanocomposite: A Systematic Review. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1688. [PMID: 33808198 PMCID: PMC8037094 DOI: 10.3390/ma14071688] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 12/14/2022]
Abstract
Researchers have developed novel nanocomposites that incorporate additional biomaterials with dimethylaminohexadecyl methacrylate (DMAHDM) in order to reduce secondary caries. The aim of this review was to summarize the current literature and assess the synergistic antibacterial and remineralizing effects that may contribute to the prevention of secondary caries. An electronic search was undertaken in MEDLINE using PubMed, Embase, Scopus, Web of Science and Cochrane databases. The initial search identified 954 papers. After the removal of duplicates and screening the titles and abstracts, 15 articles were eligible for this review. The amalgamation of 2-methacryloyloxyethyl phosphorylcholine (MPC) and silver nanoparticles (AgNPs) with DMAHDM resulted in increased antibacterial potency. The addition of nanoparticles of amorphous calcium phosphate (NACP) and polyamidoamine dendrimers (PAMAM) resulted in improved remineralization potential. Further clinical studies need to be planned to explore the antibacterial and remineralizing properties of these novel composites for clinical success.
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Affiliation(s)
- Alison Clarin
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
| | - Daphne Ho
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
| | - Jana Soong
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
| | - Cheryl Looi
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
| | - Deepak Samuel Ipe
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
- Menzies Health Institute Queensland, Gold Coast 4217, Australia
| | - Santosh Kumar Tadakamadla
- School of Dentistry and Oral Health, Griffith University, Gold Coast 4217, Australia; (A.C.); (D.H.); (J.S.); (C.L.); (D.S.I.)
- Menzies Health Institute Queensland, Gold Coast 4217, Australia
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Khan AS, Ur Rehman S, AlMaimouni YK, Ahmad S, Khan M, Ashiq M. Bibliometric Analysis of Literature Published on Antibacterial Dental Adhesive from 1996-2020. Polymers (Basel) 2020; 12:E2848. [PMID: 33260410 PMCID: PMC7761276 DOI: 10.3390/polym12122848] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 12/28/2022] Open
Abstract
This study aimed to investigate the current state of research on antibacterial dental adhesives. The interest in this field can be drawn from an increasing number of scholarly works in this area. However, there is still a lack of quantitative measurement of this topic. The main aim of this study was to consolidate the research published on the antibacterial adhesive from 1996 to 2020 in Web of Science indexed journals. The bibliometric method, a quantitative study of investigating publishing trends and patterns, was used for this study. The result has shown that a gradual increase in research was found, whereby a substantial increase was observed from 2013. A total of 248 documents were published in 84 journals with total citations of 5107. The highly cited articles were published mainly in Q1 category journals. Most of the published articles were from the USA, China, and other developed countries; however, some developing countries contributed as well. The authorship pattern showed an interdisciplinary and collaborative approach among researchers. The thematic evaluation of keywords along with a three-factor analysis showed that 'antibacterial adhesives' and 'quaternary ammonium' have been used commonly. This bibliometric analysis can provide direction not only to researchers but also to funding organizations and policymakers.
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Affiliation(s)
- Abdul Samad Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia;
| | - Shafiq Ur Rehman
- Deanship of Library Affairs, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia;
| | - Yara Khalid AlMaimouni
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia;
| | - Shakil Ahmad
- Central Library, Prince Sultan University, Riyadh 11586, Saudi Arabia;
| | - Maria Khan
- Department of Oral Biology, University of Health Sciences, Lahore 54000, Pakistan;
| | - Murtaza Ashiq
- Islamabad Model College for Boys, H-9, Islamabad 44000, Pakistan;
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Application of Antimicrobial Polymers in the Development of Dental Resin Composite. Molecules 2020; 25:molecules25204738. [PMID: 33076515 PMCID: PMC7587579 DOI: 10.3390/molecules25204738] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/12/2020] [Accepted: 10/15/2020] [Indexed: 12/20/2022] Open
Abstract
Dental resin composites have been widely used in a variety of direct and indirect dental restorations due to their aesthetic properties compared to amalgams and similar metals. Despite the fact that dental resin composites can contribute similar mechanical properties, they are more likely to have microbial accumulations leading to secondary caries. Therefore, the effective and long-lasting antimicrobial properties of dental resin composites are of great significance to their clinical applications. The approaches of ascribing antimicrobial properties to the resin composites may be divided into two types: The filler-type and the resin-type. In this review, the resin-type approaches were highlighted. Focusing on the antimicrobial polymers used in dental resin composites, their chemical structures, mechanical properties, antimicrobial effectiveness, releasing profile, and biocompatibility were included, and challenges, as well as future perspectives, were also discussed.
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Biocompatibility, mechanical, and bonding properties of a dental adhesive modified with antibacterial monomer and cross-linker. Clin Oral Investig 2020; 25:2877-2889. [PMID: 33006665 DOI: 10.1007/s00784-020-03605-w] [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: 05/22/2020] [Accepted: 09/23/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES This study investigated the antibacterial, cytotoxicity, and mechanical properties of a dental adhesive modified with quaternary ammonium monomer ((2-acryloyloxyethyl)dimethyldodecylammonium bromide) and cross-linker (bis(2-acryloyloxyethyl)methyldodecylammonium bromide). MATERIALS AND METHODS Monomer (M), cross-linker (C), or a combination of these (M + C) were incorporated into adhesive Adper Single Bond Plus (SB) in 5, 10, or 25% (as wt%). A colony-forming unit and MTT assays were used to evaluate antibacterial properties against Streptococcus mutans and cell viability. Resin-dentin beams (0.9 ± 0.1 mm2) were evaluated for micro-tensile bond strength (μTBS) after 24 h, 6 months, and 3 years. Hourglass specimens were evaluated for ultimate tensile strength (UTS) after 24 h, 1 week, and 6 months. Micro-hardness measurements after softening in ethanol were taken as an indirect assessment of the polymer cross-linking density. Kruskal-Wallis, one-way ANOVA, two-way ANOVA, and Student's t test were used for analysis of the antibacterial, cytotoxicity, μTBS, UTS, and hardness data, all with a significance level of p < 0.05. RESULTS 10%M and 25%M demonstrated a significant reduction in S. mutans relative to SB (p < 0.001). No differences in cytotoxicity were detected for any of the groups. After 6 months, no changes in μTBS were shown for any of the groups. After 3 years, all groups evidenced a significant decrease in μTBS (p < 0.05) except 5%M, 5%C, and 5%M + 5%C. All groups demonstrated either stable or significantly increased UTS after 6 months. Except for the cross-linker groups, a significant decrease in micro-hardness was shown for all groups after softening in ethanol (p < 0.05). CONCLUSIONS A 5-10% of monomer may render the resin antibacterial without a compromise to its mechanical and bonding properties. CLINICAL RELEVANCE Biomodification of a resin adhesive with an antibacterial monomer and cross-linker may help improve the life span of adhesive restorations.
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Synthesis of Dimethyl Octyl Aminoethyl Ammonium Bromide and Preparation of Antibacterial ABS Composites for Fused Deposition Modeling. Polymers (Basel) 2020; 12:polym12102229. [PMID: 32998332 PMCID: PMC7600671 DOI: 10.3390/polym12102229] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 09/25/2020] [Accepted: 09/26/2020] [Indexed: 02/04/2023] Open
Abstract
Additive manufacturing (AM) demonstrates benefits in the high-precision production of devices with complicated structures, and the modification of materials for AM is an urgent need. To solve the bacterial infection of medical devices in their daily application, dimethyl octyl aminoethyl ammonium bromide (octyl-QDED), an organic antibacterial agent, was synthesized via the quaternary ammonium reaction. Then, the synthesized octyl-QDED was blended with acrylonitrile butadiene styrene (ABS) through the melt extrusion process to prepare antibacterial composite filaments for fused deposition modeling (FDM). The entire preparation processes were convenient and controllable. Characterizations of the structure and thermal stability of octyl-QDED confirmed its successful synthesis and application in the subsequent processes. The introduced maleic acid in the blending process acted as a compatibilizer, which improved the compatibility between the two phases. Characterizations of the rheological and mechanical properties proved that the addition of octyl-QDED made a slight difference to the comprehensive performance of the ABS matrix. When the content of octyl-QDED reached 3 phr, the composites showed excellent antibacterial properties. The prepared antibacterial composite filaments for FDM demonstrated great potential in medical and surgical areas.
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21
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A Multifunctional Antibacterial and Osteogenic Nanomedicine: QAS-Modified Core-Shell Mesoporous Silica Containing Ag Nanoparticles. BIOMED RESEARCH INTERNATIONAL 2020; 2020:4567049. [PMID: 33015165 PMCID: PMC7520689 DOI: 10.1155/2020/4567049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 08/21/2020] [Accepted: 09/04/2020] [Indexed: 12/16/2022]
Abstract
Treatments for infectious bone defects such as periodontitis require antibacterial and osteogenic differentiation capabilities. Nanotechnology has prompted the development of multifunctional material. In this research, we aim to synthesize a nanoparticle that can eliminate periodontal pathogenic microorganisms and simultaneously stimulate new bone tissue regeneration and mineralization. QAS-modified core-shell mesoporous silica containing Ag nanoparticles (Ag@QHMS) was successfully synthesized through the classic hydrothermal method and surface quaternary ammonium salt functionalization. The Ag@QHMS in vitro antibacterial activity was explored via coculture with Staphylococcus aureus, Escherichia coli, and Porphyromonas gingivalis biofilms. Bone mesenchymal stem cells (BMSCs) were selected for observing cytotoxicity, apoptosis, and osteogenic differentiation. Ag@QHMS showed a good sustained release profile of Ag+ and a QAS-grafted mesoporous structure. Compared with the single-contact antibacterial activity of QHMS, Ag@QHMS exhibited a more efficient and stable concentration-dependent antimicrobial efficacy; the minimum inhibitory concentration was within 100 μg/ml, which was below the BMSC biocompatibility concentration (200 μg/ml). Thus, apoptosis would not occur while promoting the increased expression of osteogenic-associated factors, such as runt-related transcription factor 2 (RUNX2), alkaline phosphatase (ALP), osteopontin (OPN), osteocalcin (OCN), bone sialoprotein (BSP), and collagen type 1 (COL-1). A safe concentration of particles can stimulate cell alkaline phosphatase and matrix calcium salt deposition. The dual antibacterial effect from the direct contact killing of QAS and the sustained release of Ag nanoparticles, along with the Ag-promoted osteogenic differentiation, had been verified and utilized in Ag@QHMS. This system demonstrates the potential for utilizing pluripotent biomaterials to treat complex lesions.
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Ibrahim MS, Balhaddad AA, Garcia IM, Hefni E, Collares FM, Martinho FC, Weir MD, Xu HHK, Melo MAS. Tooth sealing formulation with bacteria‐killing surface and on‐demand ion release/recharge inhibits early childhood caries key pathogens. J Biomed Mater Res B Appl Biomater 2020; 108:3217-3227. [DOI: 10.1002/jbm.b.34659] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 03/15/2020] [Accepted: 05/19/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Maria Salem Ibrahim
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
- Department of Preventive Dental Sciences, College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia
| | - Abdulrahman A. Balhaddad
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
- Department of Restorative Dental Sciences, College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia
| | - Isadora M. Garcia
- Department of Conservative Dentistry, Dental Materials Laboratory, School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
| | - Eman Hefni
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
| | - Fabricio M. Collares
- Department of Conservative Dentistry, Dental Materials Laboratory, School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
| | - Frederico C. Martinho
- Department of Advanced Oral Sciences and Therapeutics University of Maryland School of Dentistry Baltimore Maryland USA
| | - Michael D. Weir
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
- Department of Advanced Oral Sciences and Therapeutics University of Maryland School of Dentistry Baltimore Maryland USA
| | - Hockin H. K. Xu
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
- Department of Advanced Oral Sciences and Therapeutics University of Maryland School of Dentistry Baltimore Maryland USA
| | - Mary Anne S. Melo
- PhD Program in Dental Biomedical Sciences University of Maryland School of Dentistry Baltimore Maryland USA
- Division of Operative Dentistry, Department of General Dentistry University of Maryland School of Dentistry Baltimore Maryland USA
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23
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Application of Antibiotics/Antimicrobial Agents on Dental Caries. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5658212. [PMID: 32076608 PMCID: PMC7013294 DOI: 10.1155/2020/5658212] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/13/2019] [Indexed: 02/05/2023]
Abstract
Dental caries is the most common oral disease. The bacteriological aetiology of dental caries promotes the use of antibiotics or antimicrobial agents to prevent this type of oral infectious disease. Antibiotics have been developed for more than 80 years since Fleming discovered penicillin in 1928, and systemic antibiotics have been used to treat dental caries for a long time. However, new types of antimicrobial agents have been developed to fight against dental caries. The purpose of this review is to focus on the application of systemic antibiotics and other antimicrobial agents with respect to their clinical use to date, including the history of their development, and their side effects, uses, structure types, and molecular mechanisms to promote a better understanding of the importance of microbial interactions in dental plaque and combinational treatments.
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Martins FV, Santana RB, Fonseca EM. Efficacy of conventional cord versus cordless techniques for gingival displacement: A systematic review and meta-analysis. J Prosthet Dent 2020; 125:46-55. [PMID: 32008797 DOI: 10.1016/j.prosdent.2019.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 09/15/2019] [Accepted: 09/16/2019] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Unsatisfactory adaptation of restorations with subgingival margins can cause problems such as accumulation of biofilm, secondary caries, and inflammation of the periodontal tissue. Therefore, special attention should be given to gingival displacement and impression procedures to optimize marginal fit. PURPOSE The purpose of this systematic review and meta-analysis was to compare gingival displacement with conventional cords and cordless techniques and determine the reliability of the measurement methodologies. MATERIAL AND METHODS This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement and identified studies through September 2018. The studies were submitted to the Cochrane risk-of-bias assessment. The gingival displacement was evaluated by using the Review Manager Software. RESULTS Nine studies were selected, and the most common risks of bias were random sequence generation, blinding of outcome assessment, and absence of sample size calculation. Most of the studies reported obtaining a width greater than 0.2 mm. CONCLUSIONS The cord technique resulted in increased displacement when compared with the cordless technique. The evaluation of sulcular width with digital microscope images obtained from sectioned gypsum casts is an adequate and versatile experimental methodology for measuring displacement.
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Affiliation(s)
- Felipe V Martins
- Postgraduate student, Federal Fluminense University (UFF), Niteroi, Rio de Janeiro, Brazil.
| | - Ronaldo B Santana
- Professor, Department of Periodontology, Federal Fluminense University (UFF), Niteroi, Rio de Janeiro, Brazil
| | - Edgard M Fonseca
- Professor, Department of Dental Technique, Federal Fluminense University (UFF), Niteroi, Rio de Janeiro, Brazil
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Ibrahim MS, Garcia IM, Vila T, Balhaddad AA, Collares FM, Weir MD, Xu HHK, Melo MAS. Multifunctional antibacterial dental sealants suppress biofilms derived from children at high risk of caries. Biomater Sci 2020; 8:3472-3484. [DOI: 10.1039/d0bm00370k] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dental sealant containing antibacterial and bioactive agents decreased biofilm formation due to the saliva of children at low and high risk of caries.
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Affiliation(s)
- Maria Salem Ibrahim
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Isadora Martini Garcia
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Taissa Vila
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Abdulrahman A. Balhaddad
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Fabrício Mezzomo Collares
- Dental Materials Laboratory
- School of Dentistry
- Federal University of Rio Grande do Sul
- Porto Alegre
- Brazil
| | - Michael D. Weir
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Hockin H. K. Xu
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Mary Anne S. Melo
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
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Matsuo K, Yoshihara K, Nagaoka N, Makita Y, Obika H, Okihara T, Matsukawa A, Yoshida Y, Van Meerbeek B. Rechargeable anti-microbial adhesive formulation containing cetylpyridinium chloride montmorillonite. Acta Biomater 2019; 100:388-397. [PMID: 31568874 DOI: 10.1016/j.actbio.2019.09.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/11/2019] [Accepted: 09/26/2019] [Indexed: 12/15/2022]
Abstract
Long-term anti-bacterial effect is a desired ability of any dental material in combating tooth caries as one of the most common and widespread persistent diseases today. Among several cationic quaternary ammonium compounds with antiseptic properties, cetylpyridinium chloride (CPC) is often used in mouthrinses and toothpastes. In this study, we incorporated CPC in a soft phyllosilicate mineral (clay), referred to as montmorillonite (Mont), to enable gradual CPC release with rechargeability. Besides measuring CPC release and recharge, we examined the anti-bacterial effect, cytotoxicity and bonding effectiveness of five experimental adhesive formulations, prepared by adding 1 and 3 wt% CPC_Mont, 3 wt% Mont (without CPC), and 1 and 3 wt% CPC (without Mont) to the commercial adhesive Clearfil S3 Bond ND Quick ('C-S3B'; Kuraray Noritake). Strong inhibition of Streptococcus mutans biofilm formation by CPC_Mont adhesives was confirmed by optical density and SEM. CPC release from CPC_Mont adhesives was higher and lasted longer than from CPC adhesives, while CPC_Mont adhesives could also be recharged with CPC upon immersion in 2 wt% CPC. In conclusion, CPC_Mont technology rendered adhesives anti-bacterial properties with recharge ability, this without reducing its bonding potential, neither increasing its cytotoxicity. STATEMENT OF SIGNIFICANCE: Dental caries is one of the most prevalent chronic diseases in the population worldwide and is the major cause of tooth loss. In this study, we developed cetylpyridinium chloride (CPC) loaded montmorillonite (CPC-Mont) with a long-term antibacterial efficacy to prevent caries. CPC is an antibacterial agent approved by FDA, used as an OTC drug and contained in oral hygiene aids. CPC-Mont was incorporated in a dental adhesive to gradually release CPC. CPC_Mont technology rendered adhesives anti-bacterial properties with rechargeability, this without reducing its bonding potential, neither increasing its cytotoxicity.
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Wen Q, Xu L, Xiao X, Wang Z. Preparation, characterization, and antibacterial activity of cationic nanopolystyrenes. J Appl Polym Sci 2019. [DOI: 10.1002/app.48405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Qing Wen
- College of Materials and Energy, South China Agricultural University Guangzhou 510642 People's Republic of China
| | - Lijuan Xu
- College of Materials and Energy, South China Agricultural University Guangzhou 510642 People's Republic of China
| | - Xiansen Xiao
- College of Materials and Energy, South China Agricultural University Guangzhou 510642 People's Republic of China
| | - Zhenghui Wang
- College of Materials and Energy, South China Agricultural University Guangzhou 510642 People's Republic of China
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Wu J, Zhou C, Ruan J, Weir MD, Tay F, Sun J, Melo MAS, Oates TW, Chang X, Xu HH. Self-healing adhesive with antibacterial activity in water-aging for 12 months. Dent Mater 2019; 35:1104-1116. [DOI: 10.1016/j.dental.2019.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/23/2019] [Accepted: 05/06/2019] [Indexed: 11/27/2022]
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Liu Q, Wu B, Yu Q, Wang Y. Immobilization of quaternary ammonium based antibacterial monomer onto dentin substrate by non-thermal atmospheric plasma. Dent Mater J 2019; 38:821-829. [PMID: 31366767 DOI: 10.4012/dmj.2018-267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Use of non-thermal atmospheric plasma (NTAP) brush on immobilization of dimethylaminohexadecyl methacrylate (DMAHDM) onto dentin bonding substrate, and resulting antibacterial activity against Streptococcus mutans were investigated. A bonding substrate with several-micron-demineralized layer was created from human dentin. DMAHDM was applied onto the demineralized layer with or without plasma exposure. Scanning electron microscopy (SEM) and Fourier transformed infrared (FTIR) spectroscopy were employed to verify immobilization/grafting of DMAHDM onto the substrate. Antibacterial activity of the resulting substrate was assessed by using colony-forming unit (CFU) and confocal scanning laser microscopy. Effects of saliva pellicle treatment and aging process on the above substrate were also evaluated. The SEM/FTIR results demonstrated that NTAP could induce DMAHDM immobilization onto dentin substrate, which was further verified via quantitative FTIR analysis. Comparing with non-plasma-treated, the plasmatreated substrate, with CFU 4 log lower, exhibited much stronger inhibitory effects, which were minimally affected by saliva or aging. The DMAHDM-immobilized dentin substrate showed effective and sustained antibacterial characteristics.
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Affiliation(s)
- Qi Liu
- Department of Stomatology, Nanfang Hospital, Southern Medical University.,Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City School of Dentistry
| | - Buling Wu
- Department of Stomatology, Nanfang Hospital, Southern Medical University
| | - Qingsong Yu
- Department of Mechanical and Aerospace Engineering, University of Missouri
| | - Yong Wang
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City School of Dentistry
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Zhou X, Huang X, Li M, Peng X, Wang S, Zhou X, Cheng L. Development and status of resin composite as dental restorative materials. J Appl Polym Sci 2019. [DOI: 10.1002/app.48180] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xinxuan Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xiaoyu Huang
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Mingyun Li
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Xian Peng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Suping Wang
- Department of Operative Dentistry and Endodontics & Stomatology CenterThe First Affiliated Hospital of Zhengzhou University Zhengzhou 540052 Henan China
| | - Xuedong Zhou
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
| | - Lei Cheng
- State Key Laboratory of Oral DiseasesSichuan University Chengdu 610041 Sichuan China
- Department of Operative Dentistry and Endodontics, West China Hospital of StomatologySichuan University Chengdu 610041 Sichuan China
- National Clinical Research Center for Oral DiseasesSichuan University Chengdu 610041 Sichuan China
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Maia AC, Mangabeira A, Vieira R, Neves ADA, Lopes RT, Pires TM, Viana GM, Cabral LM, Cavalcante LM, Portela MB. Experimental composites containing quaternary ammonium methacrylates reduce demineralization at enamel-restoration margins after cariogenic challenge. Dent Mater 2019; 35:e175-e183. [PMID: 31204047 DOI: 10.1016/j.dental.2019.05.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE This study evaluated the influence of experimental composites containing quaternary ammonium monomers (QAM) at different concentrations and alkyl chains on demineralization at enamel-composite margins after cariogenic challenge. METHODS Standardized 4×4mm cavities were cut into 35 bovine enamel blocks, which were randomly divided into seven groups (n=5) and restored with the following experimental composites and commercial materials: (G12.5) - 5% dimethylaminododecyl methacrylate (DMADDM) with a 12-carbon alkyl chain (G12.10) - 10% DMADDM, (G16.5) - 5% dimethylaminohexadecyl methacrylate (DMAHDM) with a 16-carbon alkyl chain (G16.10) - 10% DMAHDM, (CG) - control group (without QAM), (GZ250) - commercial composite (Filtek Z250®), and (GIC) - glass ionomer cement (Maxxion R®). After restorative procedures, initial microhardness was measured and experimental composites were subjected to Streptococcus mutans biofilm formation for 48h. After cariogenic challenge, the samples were washed and microhardness was reassessed. A 3D non-contact profilometer was used to determine surface roughness and enamel demineralization was assessed by micro-CT. Microhardness results were analyzed by the Kruskal-Wallis and Mann-Whitney tests and micro-CT results were analyzed by Tukey's HSD test (95% confidence interval). RESULTS None of the materials could prevent mineral loss at the enamel-restoration margins. The addition of 10% DMAHDM yielded the lowest, albeit statistically significant, mineral loss (p<0.05). 3D non-contact profilometry showed enamel surface roughness modification after biofilm exposure. The CG had the highest roughness values. Micro-CT analysis revealed mineral loss, except for GIC. SIGNIFICANCE The addition of 10% QAM with a 16-carbon chain in experimental composites reduced mineral loss at the enamel-restoration margins after cariogenic challenge.
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Affiliation(s)
- André Coimbra Maia
- Faculdade de Odontologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Adrielle Mangabeira
- Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Renato Vieira
- Faculdade de Odontologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Aline de Almeida Neves
- Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ricardo Tadeu Lopes
- Laboratório de Instrumentação Nuclear, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Thais Maria Pires
- Laboratório de Instrumentação Nuclear, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Gil Mendes Viana
- Faculdade de Farmácia, Laboratório TIF, Universidade Federal do Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil
| | - Lúcio Mendes Cabral
- Faculdade de Farmácia, Laboratório TIF, Universidade Federal do Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil
| | - Larissa Maria Cavalcante
- Faculdade de Odontologia, Universidade Federal Fluminense, Niterói, RJ, Brazil; Núcleo de Pesquisa em Biomateriais Dentários, Faculdade de Odontologia, Universidade Veiga de Almeida - UVA, Rio de Janeiro, RJ, Brazil
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Effects of single species versus multispecies periodontal biofilms on the antibacterial efficacy of a novel bioactive Class-V nanocomposite. Dent Mater 2019; 35:847-861. [DOI: 10.1016/j.dental.2019.02.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 02/21/2019] [Accepted: 02/27/2019] [Indexed: 12/21/2022]
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Baras BH, Melo MAS, Sun J, Oates TW, Weir MD, Xie X, Bai Y, Xu HHK. Novel endodontic sealer with dual strategies of dimethylaminohexadecyl methacrylate and nanoparticles of silver to inhibit root canal biofilms. Dent Mater 2019; 35:1117-1129. [PMID: 31128937 DOI: 10.1016/j.dental.2019.05.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/26/2019] [Accepted: 05/07/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Endodontic treatment failures and recontamination remain a major challenge. The objectives of this study were to: (1) develop a new root canal sealer with potent and long-lasting antibiofilm effects using dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of silver (NAg); (2) determine the effects of incorporating DMAHDM and NAg each alone versus in combination on biofilm-inhibition efficacy; and (3) determine the effects on sealer paste flow, film thickness and sealing ability, compared to a commercial control sealer. METHODS Dual-cure endodontic sealers were formulated using DMAHDM mass fractions of 0%, 2.5% and 5%, and NAg mass fractions of 0.05%, 0.1% and 0.15%. The sealing ability of the sealers was measured using linear dye penetration method. Colony-forming units (CFU), live/dead assay, and polysaccharide production of biofilms grown on sealers were determined. RESULTS The sealer with 5% DMAHDM and 0.15% NAg yielded a flow of (22.18 ± 0.58) which was within the range of ISO recommendations and not statistically different from AH Plus control (23.3 ± 0.84) (p > 0.05). Incorporating DMAHDM and NAg did not negatively affect the film thickness and sealing properties (p > 0.05). The sealer with 5% DMAHDM and 0.15% NAg greatly reduced polysaccharide production by the biofilms, and decreased the biofilm CFU by nearly 6 orders of magnitude, compared to AH Plus and experimental controls (p < 0.05). SIGNIFICANCE A therapeutic root canal sealer was developed using 5% DMAHDM with biofilm-inhibition through contact-mediated mechanisms, plus 0.15% of NAg to release silver ions into the complex and difficult-to-reach root canal environment. The novel root canal sealer exerted potent antibiofilm effects and reduced biofilm CFU by 6 orders of magnitude without compromising sealer flow, film thickness and sealing ability. This method provided a promising approach to inhibit endodontic biofilms and prevent recurrent endodontic infections.
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Affiliation(s)
- Bashayer H Baras
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Mary Anne S Melo
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Jirun Sun
- Volpe Research Center, American Dental Association Foundation, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Thomas W Oates
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Xianju Xie
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China.
| | - Yuxing Bai
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Purushothaman M, Krishnan PSG, Nayak SK. Synergistic effect of alkyl lactate functional groups on properties of methacrylate polymers. IRANIAN POLYMER JOURNAL 2019. [DOI: 10.1007/s13726-019-00712-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu J, Xie X, Zhou H, Tay FR, Weir MD, Melo MAS, Oates TW, Zhang N, Zhang Q, Xu HH. Development of a new class of self-healing and therapeutic dental resins. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.02.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Baras BH, Wang S, Melo MAS, Tay F, Fouad AF, Arola DD, Weir MD, Xu HHK. Novel bioactive root canal sealer with antibiofilm and remineralization properties. J Dent 2019; 83:67-76. [PMID: 30825569 DOI: 10.1016/j.jdent.2019.02.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 02/09/2019] [Accepted: 02/20/2019] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES (1) To develop a novel bioactive root canal sealer with antibiofilm and remineralization properties using dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP); (2) investigate the effects on E. faecalis biofilm inhibition, sealer flow and sealing ability, compared with an epoxy-resin-based sealer AH Plus; and (3) investigate the calcium (Ca) and phosphate (P) ion release from the sealers. METHODS A series of dual-cure endodontic sealers were formulated with DMAHDM and NACP at 5% and 20% by mass, respectively. Flow properties and sealing ability of the sealers were measured. Colony-forming units (CFU), live/dead assay, and polysaccharide production of biofilms on sealers were determined. Ca and P ion releases from the sealers were measured. RESULTS The new sealer containing 20% NACP and 5% DMAHDM yielded a paste flow of (28.99 ± 0.69) mm, within the range of ISO recommendations. The sealing properties of the sealer with 5% DMAHDM and 20% NACP were similar to a commercial control (p > 0.05). The sealer with DMAHDM decreased E. faecalis biofilm CFU by more than 4 orders of magnitude, compared to AH plus and experimental controls. The sealer with 20% NACP and 5% DMAHDM had relatively high levels of Ca and P ion release necessary for remineralization. CONCLUSIONS A new bioactive endodontic sealer was developed with strong antibiofilm activity against E. faecalis biofilms and high levels of Ca and P ion release for remineralization, without compromising the paste flow and sealing properties. CLINICAL SIGNIFICANCE The bioactive antibacterial and remineralizing root canal sealer is promising to inhibit E. faecalis biofilms to prevent endodontic treatment failure and secondary endodontic infections, while releasing high levels of Ca and P ions that could remineralize and strengthen the tooth structures and potentially prevent future root fractures and teeth extractions.
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Affiliation(s)
- Bashayer H Baras
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Suping Wang
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Operative Dentistry and Endodontics & Stomatology Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Mary Anne S Melo
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Franklin Tay
- Department of Endodontics, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Ashraf F Fouad
- Department of Endodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC 27599-7450, USA
| | - Dwayne D Arola
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Ferreira CJ, Leitune VCB, Balbinot GDS, Degrazia FW, Arakelyan M, Sauro S, Mezzomo Collares F. Antibacterial and Remineralizing Fillers in Experimental Orthodontic Adhesives. MATERIALS 2019; 12:ma12040652. [PMID: 30795577 PMCID: PMC6416618 DOI: 10.3390/ma12040652] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 02/14/2019] [Accepted: 02/18/2019] [Indexed: 12/25/2022]
Abstract
Orthodontic adhesives with antimicrobial and remineralizing properties may be an alternative to control white spot lesions around brackets. The aim of this study is to develop an experimental orthodontic adhesive containing boron nitride nanotubes (BNNT) and alkyl trimethyl ammonium bromide (ATAB). Methacrylate (BisGMA and TEGDMA) monomers were used to formulate the adhesives. Four experimental groups were produced with the addition of 0.1 wt.% BNNT (GBNNT); 0.1 wt.% ATAB (GATAB); and 0.2 wt.% BNNT with ATAB (GBNNT/ATAB); in the control group, no fillers were added (GCtrl). The degree of conversion, cytotoxicity, softening in solvent, contact angle and free surface energy, antibacterial activity, shear bond strength, and mineral deposition were evaluated. Adhesives achieved degree of conversion higher than 50% and cell viability higher than 90%. GBNNT and GATAB adhesives exhibited reduced softening in solvent. Mean free surface energy was decreased in the GBNNT adhesive. Significant reduction in bacterial growth was observed in the GBNNT/ATAB. No statistical difference was found for shear bond strength. Mineral deposition was found in GBNNT, GATAB, and GBNNT/ATAB groups after 14 and 28 days. The addition of 0.2% BNNT/ATAB to an experimental orthodontic adhesive inhibited bacterial growth and induced mineral deposition without affecting the properties of the material.
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Affiliation(s)
- Carolina Jung Ferreira
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-003, Brazil.
| | - Vicente Castelo Branco Leitune
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-003, Brazil.
| | - Gabriela de Souza Balbinot
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-003, Brazil.
| | - Felipe Weidenbach Degrazia
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-003, Brazil.
| | - Marianna Arakelyan
- Department of Therapеutic Dentistry Sechenov University, Mozhaisky Val, 11 119435 Moscow, Russia.
| | - Salvatore Sauro
- BioMat-Dental Biomaterials Laboratory, Faculty of Health Sciences, University CEU-Cardenal Herrera, 46115 Valencia, Spain.
| | - Fabricio Mezzomo Collares
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-003, Brazil.
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Zhou W, Liu S, Zhou X, Hannig M, Rupf S, Feng J, Peng X, Cheng L. Modifying Adhesive Materials to Improve the Longevity of Resinous Restorations. Int J Mol Sci 2019; 20:ijms20030723. [PMID: 30744026 PMCID: PMC6387348 DOI: 10.3390/ijms20030723] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/23/2019] [Accepted: 02/04/2019] [Indexed: 11/16/2022] Open
Abstract
Dental caries is a common disease on a global scale. Resin composites are the most popular materials to restore caries by bonding to tooth tissues via adhesives. However, multiple factors, such as microleakage and recurrent caries, impair the durability of resinous restorations. Various innovative methods have been applied to develop adhesives with particular functions to tackle these problems, such as incorporating matrix metalloproteinase inhibitors, antibacterial or remineralizing agents into bonding systems, as well as improving the mechanical/chemical properties of adhesives, even combining these methods. This review will sum up the latest achievements in this field.
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Affiliation(s)
- Wen Zhou
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Shiyu Liu
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, Homburg/Saar, Germany.
| | - Stefan Rupf
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, Homburg/Saar, Germany.
| | - Jin Feng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Geriatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Xian Peng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
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Lapinska B, Konieczka M, Zarzycka B, Sokolowski K, Grzegorczyk J, Lukomska-Szymanska M. Flow Cytometry Analysis of Antibacterial Effects of Universal Dentin Bonding Agents on Streptococcus mutans. Molecules 2019; 24:E532. [PMID: 30717140 PMCID: PMC6384823 DOI: 10.3390/molecules24030532] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 01/23/2019] [Accepted: 01/31/2019] [Indexed: 12/20/2022] Open
Abstract
There is no consensus on the antibacterial activity of dentin bonding systems (DBS). Many study models have been used to evaluate the antimicrobial activity of dental materials. In this study, a novel detection method, flow cytometry, was introduced. It allows for evaluation of the antibacterial activity of DBS, based on assessment of the disruption of the bacterial physical membrane induced by DBS. The aim of the study was to evaluate the antibacterial properties of selected dentin bonding systems against Streptococcus mutans. The highest antibacterial activity against S. mutans was observed for Adhese Universal (99.68% dead cells) and was comparable to that of Prime&Bond Universal, OptiBond Universal, or Clearfil Universal Bond Quick (p > 0.05). The lowest activity of all tested systems was displayed by the multi-mode adhesive, Universal Bond (12.68% dead bacteria cells), followed by the self-etch adhesive, OptiBond FL (15.58% dead bacteria cells). The present study showed that in the case of two-component DBS, the primer exhibited higher antimicrobial activity than the adhesive (or bond) itself.
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Affiliation(s)
- Barbara Lapinska
- Department of General Dentistry, Medical University of Lodz, 92-213 Lodz, Poland.
| | - Magdalena Konieczka
- Department of Microbiology and Laboratory Medical Immunology, Medical University of Lodz, 92-213 Lodz, Poland.
| | - Beata Zarzycka
- Department of Microbiology and Laboratory Medical Immunology, Medical University of Lodz, 92-213 Lodz, Poland.
| | - Krzysztof Sokolowski
- Department of Conservative Dentistry, Medical University of Lodz, 92-213 Lodz, Poland.
| | - Janina Grzegorczyk
- Department of Microbiology and Laboratory Medical Immunology, Medical University of Lodz, 92-213 Lodz, Poland.
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Wang W, Wu F, Zhang G, Zhu S, Ban J, Wang L. Preparation of a highly crosslinked biosafe dental nanocomposite resin with a tetrafunctional methacrylate quaternary ammonium salt monomer. RSC Adv 2019; 9:41616-41627. [PMID: 35541606 PMCID: PMC9076464 DOI: 10.1039/c9ra09173d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/10/2019] [Indexed: 12/24/2022] Open
Abstract
The design of antimicrobial dental nanocomposite resin to prevent secondary dental caries and minimize biosafety problems is an important endeavor with both fundamental and practical implications.
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Affiliation(s)
- Weiguo Wang
- Department of Stomatology
- Hangzhou
- People's Republic of China
| | - Fan Wu
- Department of Stomatology
- Hangzhou
- People's Republic of China
| | - Guoqing Zhang
- Department of Stomatology
- Hangzhou
- People's Republic of China
| | - Sailing Zhu
- Department of Stomatology
- Hangzhou
- People's Republic of China
| | - Jinghao Ban
- School of Stomatology
- Fourth Military Medical University
- Xi'an
- People's Republic of China
| | - Limin Wang
- Department of Stomatology
- Hangzhou
- People's Republic of China
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Wang H, Wang S, Cheng L, Jiang Y, Melo MAS, Weir MD, Oates TW, Zhou X, Xu HHK. Novel dental composite with capability to suppress cariogenic species and promote non-cariogenic species in oral biofilms. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 94:587-596. [PMID: 30423744 PMCID: PMC6239200 DOI: 10.1016/j.msec.2018.10.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 09/10/2018] [Accepted: 10/01/2018] [Indexed: 02/05/2023]
Abstract
Recurrent caries often occurs and is a primary reason for the failure of dental composite restorations. The objectives of this study were to: (1) develop a bioactive composite containing dimethylaminohexadecyl methacrylate (DMAHDM), (2) investigate its antibacterial effects and suppression on biofilm growth, and (3) investigate its ability to modulate biofilm species composition for the first time. DMAHDM was incorporated into a composite at mass% of 0%, 0.75%, 1.5%, 2.25% and 3%. A commercial composite Heliomolar served as a comparative control. A biofilm model consisting of Streptococcus mutans (S. mutans), Streptococcus sanguinis (S. sanguinis) and Streptococcus gordonii (S. gordonii) was tested by growing biofilms for 48 h and 72 h on composites. Colony-forming units (CFUs), metabolic activity and live/dead staining were evaluated. Lactic acid and polysaccharide productions were measured to assess biofilm cariogenicity. TaqMan real-time polymerase chain reaction was used to determine the proportion of each species in the biofilm. DMAHDM-containing composite had a strong anti-biofilm function, reducing biofilm CFU by 2-3 orders of magnitude, compared to control composite. Biofilm metabolic activity, lactic acid and polysaccharides were decreased substantially, compared to control (p < 0.05). At 72 h, the cariogenic S. mutans proportion in the biofilm on the composite with 3% DMAHDM was 19.9%. In contrast, an overwhelming S. mutans proportion of 92.2% and 91.2% existed in biofilms on commercial control and 0% DMAHDM, respectively. In conclusion, incorporating DMAHDM into dental composite: (1) yielded potent anti-biofilm properties; (2) modulated the biofilm species composition toward a non-cariogenic tendency. The new DMAHDM composite is promising for applications in a wide range of tooth cavity restorations to modulate oral biofilm species and combat caries.
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Affiliation(s)
- Haohao Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Suping Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Yaling Jiang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Mary Anne S Melo
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Thomas W Oates
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Feng J, Cheng L, Zhou X, Xu HHK, Weir MD, Li Q, Hannig M, Rupf S. Effects of water aging on the mechanical and anti-biofilm properties of glass-ionomer cement containing dimethylaminododecyl methacrylate. Dent Mater 2018; 35:434-443. [PMID: 30600090 DOI: 10.1016/j.dental.2018.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 02/05/2023]
Abstract
OBJECTIVES The aims of this study were to investigate the effects of water aging for up to 6months on the mechanical and anti-biofilm properties of a novel antibacterial glass ionomer cement (GIC) containing dimethylaminododecyl methacrylate (DMADDM). METHODS GIC specimens (n=180) which contained DMADDM (0wt.%, 1.1wt.% or 2.2wt.%) were prepared. The mechanical properties surface roughness, microhardness and the surface charge density of ammonium groups were measured before and after water aging for 3 and 6months at 37°C. Further six months aged specimens (n=216) were worn by 6 volunteers in their oral cavities for 24h and 72h. Biofilm formation was analyzed and rated by fluorescence microscopy (FM) and by scanning electron microscopy (SEM). Biofilm viability was analyzed by FM. RESULTS Water aging did not show any adverse effects on the surface roughness and hardness of the material. The surface charge density of the GIC samples containing DMADDM decreased due to the aging procedure, however, was still higher than that of the GIC without DMADDM. In situ biofilm formation was significantly reduced after 24h on DMADDM containing GIC (p<0.05). FM results showed a higher ratio of red/green fluorescence on GIC-DMADDM samples. SIGNIFICANCE Incorporating DMADDM into GIC affected the material properties in a tolerable manner even after 6months of storage in water. The new GIC is a promising material to affect the biofilm formation on the surface of restorations.
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Affiliation(s)
- Jin Feng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Geriatric Dentistry West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, 66421 Homburg, Saar, Germany
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Operative Dentistry and Endodontics West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Operative Dentistry and Endodontics West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Hockin H K Xu
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Michael D Weir
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Qian Li
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, 66421 Homburg, Saar, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, 66421 Homburg, Saar, Germany
| | - Stefan Rupf
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, 66421 Homburg, Saar, Germany.
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Melo MAS, Weir MD, Passos VF, Rolim JPM, Lynch CD, Rodrigues LKA, Xu HHK. Human In Situ Study of the effect of Bis(2-Methacryloyloxyethyl) Dimethylammonium Bromide Immobilized in Dental Composite on Controlling Mature Cariogenic Biofilm. Int J Mol Sci 2018; 19:E3443. [PMID: 30400188 PMCID: PMC6274706 DOI: 10.3390/ijms19113443] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 10/24/2018] [Accepted: 10/27/2018] [Indexed: 12/21/2022] Open
Abstract
Cariogenic oral biofilms cause recurrent dental caries around composite restorations, resulting in unprosperous oral health and expensive restorative treatment. Quaternary ammonium monomers that can be copolymerized with dental resin systems have been explored for the modulation of dental plaque biofilm growth over dental composite surfaces. Here, for the first time, we investigated the effect of bis(2-methacryloyloxyethyl) dimethylammonium bromide (QADM) on human overlying mature oral biofilms grown intra-orally in human participants for 7⁻14 days. Seventeen volunteers wore palatal devices containing composite specimens containing 10% by mass of QADM or a control composite without QADM. After 7 and 14 days, the adherent biofilms were collected to determine bacterial counts via colony-forming unit (CFU) counts. Biofilm viability, chronological changes, and percentage coverage were also determined through live/dead staining. QADM composites caused a significant inhibition of Streptococcus mutans biofilm formation for up to seven days. No difference in the CFU values were found for the 14-day period. Our findings suggest that: (1) QADM composites were successful in inhibiting 1⁻3-day biofilms in the oral environment in vivo; (2) QADM significantly reduced the portion of the S. mutans group; and (3) stronger antibiofilm activity is required for the control of mature long-term cariogenic biofilms. Contact-killing strategies using dental materials aimed at preventing or at least reducing high numbers of cariogenic bacteria seem to be a promising approach in patients at high risk of the recurrence of dental caries around composites.
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Affiliation(s)
- Mary Anne S Melo
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Vanara F Passos
- Postgraduate Program in Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, CE 60430-355, Brazil.
| | | | - Christopher D Lynch
- Restorative Dentistry, University Dental School and Hospital, University College Cork, Wilton T12 K8AF, Ireland.
| | - Lidiany K A Rodrigues
- Postgraduate Program in Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, CE 60430-355, Brazil.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Martins FV, Vasques WF, Fonseca EM. Evaluation of the efficiency of fluoride-releasing adhesives for preventing secondary caries in-vitro: a systematic review and meta-analysis. Eur Arch Paediatr Dent 2018; 20:1-8. [PMID: 30382524 DOI: 10.1007/s40368-018-0388-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 10/26/2018] [Indexed: 12/27/2022]
Abstract
AIM To evaluate the efficiency of fluoride-releasing adhesives for the prevention of secondary caries on in-vitro tests. MATERIALS AND METHODS This study was performed according to the PRISMA checklist. The bibliographic research was performed to identify in-vitro studies between January 2000 and September 2017. The selected studies were submitted to bias risk assessment and data extraction. In the meta-analysis the data were evaluated using Review Manager Software. RESULTS The 11 studies that met all inclusion criteria showed that the most common risks of bias were: absence of the sample size calculation description, absence of the single operator protocol and blind operation of the test machine. The meta-analysis was performed with six studies that used polarised light microscopy in order to quantify the mineral content of dentine and presented the values as means and standard deviations. CONCLUSIONS Most of the authors presented that the fluoride-containing adhesive systems had a significant effect to reduce in-vitro secondary caries. The meta-analysis did not present statistical difference between fluoride-free and fluoride-containing adhesive systems. The artificial caries challenge methodology may have affected the results.
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Affiliation(s)
- F V Martins
- College of Dentistry, Federal Fluminense University (UFF), Mario Santos Braga St., 28-Centro, Niterói, RJ, 24020-140, Brazil.
| | - W F Vasques
- College of Dentistry, Federal Fluminense University (UFF), Mario Santos Braga St., 28-Centro, Niterói, RJ, 24020-140, Brazil
| | - E M Fonseca
- Department of Dental Technique, Federal Fluminense University(UFF), Niteroi, RJ, Brazil
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Tuning Nano-Amorphous Calcium Phosphate Content in Novel Rechargeable Antibacterial Dental Sealant. MATERIALS 2018; 11:ma11091544. [PMID: 30150536 PMCID: PMC6165359 DOI: 10.3390/ma11091544] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/12/2018] [Accepted: 08/20/2018] [Indexed: 11/29/2022]
Abstract
Dental sealants with antibacterial and remineralizing properties are promising for caries prevention among children and adolescents. The application of nanotechnology and polymer development have enabled nanoparticles of amorphous calcium phosphate (NACP) and dimethylaminohexadecyl methacrylate (DMAHDM) to emerge as anti-caries strategies via resin-based dental materials. Our objectives in this study were to (1) incorporate different mass fractions of NACP into a parental rechargeable and antibacterial sealant; (2) investigate the effects on mechanical performance, and (3) assess how the variations in NACP concentration would affect the calcium (Ca) and phosphate (PO4) ion release and re-chargeability over time. NACP were synthesized using a spray-drying technique and incorporated at mass fractions of 0, 10, 20 and 30%. Flexural strength, flexural modulus, and flowability were assessed for mechanical and physical performance. Ca and PO4 ion release were measured over 70 days, and three ion recharging cycles were performed for re-chargeability. The impact of the loading percentage of NACP upon the sealant’s performance was evaluated, and the optimized formulation was eventually selected. The experimental sealant at 20% NACP had flexural strength and flexural modulus of 79.5 ± 8.4 MPa and 4.2 ± 0.4 GPa, respectively, while the flexural strength and flexural modulus of a commercial sealant control were 70.7 ± 5.5 MPa (p > 0.05) and 3.3 ± 0.5 GPa (p < 0.05), respectively. A significant reduction in flow was observed in the experimental sealant at 30% NACP (p < 0.05). Increasing the NACP mass fraction increased the ion release. The sealant formulation with NACP at 20% displayed desirable mechanical performance and ideal flow and handling properties, and also showed high levels of long-term Ca and PO4 ion release and excellent recharge capabilities. The findings provide fundamental data for the development of a new generation of antibacterial and rechargeable Ca and PO4 dental sealants to promote remineralization and inhibit caries.
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Yue S, Wu J, Zhang Q, Zhang K, Weir MD, Imazato S, Bai Y, Xu HH. Novel dental adhesive resin with crack self-healing, antimicrobial and remineralization properties. J Dent 2018; 75:48-57. [DOI: 10.1016/j.jdent.2018.05.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/05/2018] [Accepted: 05/17/2018] [Indexed: 11/29/2022] Open
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Zhang N, Zhang K, Weir MD, Xu DJ, Reynolds MA, Bai Y, Xu HHK. Effects of water-aging for 6 months on the durability of a novel antimicrobial and protein-repellent dental bonding agent. Int J Oral Sci 2018; 10:18. [PMID: 29925870 PMCID: PMC6010414 DOI: 10.1038/s41368-018-0019-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/27/2017] [Accepted: 08/01/2017] [Indexed: 12/02/2022] Open
Abstract
Biofilms at the tooth-restoration bonded interface can produce acids and cause recurrent caries. Recurrent caries is a primary reason for restoration failures. The objectives of this study were to synthesize a novel bioactive dental bonding agent containing dimethylaminohexadecyl methacrylate (DMAHDM) and 2-methacryloyloxyethyl phosphorylcholine (MPC) to inhibit biofilm formation at the tooth-restoration margin and to investigate the effects of water-aging for 6 months on the dentin bond strength and protein-repellent and antibacterial durability. A protein-repellent agent (MPC) and antibacterial agent (DMAHDM) were added to a Scotchbond multi-purpose (SBMP) primer and adhesive. Specimens were stored in water at 37 °C for 1, 30, 90, or 180 days (d). At the end of each time period, the dentin bond strength and protein-repellent and antibacterial properties were evaluated. Protein attachment onto resin specimens was measured by the micro-bicinchoninic acid approach. A dental plaque microcosm biofilm model was used to test the biofilm response. The SBMP + MPC + DMAHDM group showed no decline in dentin bond strength after water-aging for 6 months, which was significantly higher than that of the control (P < 0.05). The SBMP + MPC + DMAHDM group had protein adhesion that was only 1/20 of that of the SBMP control (P < 0.05). Incorporation of MPC and DMAHDM into SBMP provided a synergistic effect on biofilm reduction. The antibacterial effect and resistance to protein adsorption exhibited no decrease from 1 to 180 d (P > 0.1). In conclusion, a bonding agent with MPC and DMAHDM achieved a durable dentin bond strength and long-term resistance to proteins and oral bacteria. The novel dental bonding agent is promising for applications in preventive and restorative dentistry to reduce biofilm formation at the tooth-restoration margin.
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Affiliation(s)
- Ning Zhang
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA
| | - Ke Zhang
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China.
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA.
| | - Michael D Weir
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA
| | - David J Xu
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA
| | - Mark A Reynolds
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA
| | - Yuxing Bai
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China.
| | - Hockin H K Xu
- Biomatexrials & Tissue Engineering Division, Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD, USA.
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Mechanical Engineering, University of Maryland, Baltimore County, MD, USA.
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Nanostructured Polymeric Materials with Protein-Repellent and Anti-Caries Properties for Dental Applications. NANOMATERIALS 2018; 8:nano8060393. [PMID: 29865184 PMCID: PMC6027387 DOI: 10.3390/nano8060393] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/22/2018] [Accepted: 05/30/2018] [Indexed: 12/13/2022]
Abstract
Dental caries is prevalent worldwide. Tooth cavity restorations cost more than $46 billion annually in the United States alone. The current generation of esthetic polymeric restorations have unsatisfactory failure rates. Replacing the failed restorations accounts for 50–70% of all the restorations. This article reviewed developments in producing a new generation of bioactive and therapeutic restorations. This includes: Protein-repellent and anti-caries polymeric dental composites, especially the use of 2-methacryloyloxyethyl phosphorylcholine (MPC) and dimethylaminododecyl methacrylate (DMAHDM); protein-repellent adhesives to greatly reduce biofilm acids; bioactive cements to inhibit tooth lesions; combining protein-repellency with antibacterial nanoparticles of silver; tooth surface coatings containing calcium phosphate nanoparticles for remineralization; therapeutic restorations to suppress periodontal pathogens; and long-term durability of bioactive and therapeutic dental polymers. MPC was chosen due to its strong ability to repel proteins. DMAHDM was selected because it had the most potent antibacterial activity when compared to a series of antibacterial monomers. The new generation of materials possessed potent antibacterial functions against cariogenic and periodontal pathogens, and reduced biofilm colony-forming units by up to 4 logs, provided calcium phosphate ions for remineralization and strengthening of tooth structures, and raised biofilm pH from a cariogenic pH 4.5 to a safe pH 6.5. The new materials achieved a long-term durability that was significantly beyond current commercial control materials. This new generation of bioactive and nanostructured polymers is promising for wide applications to provide therapeutic healing effects and greater longevity for dental restorations.
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Makvandi P, Jamaledin R, Jabbari M, Nikfarjam N, Borzacchiello A. Antibacterial quaternary ammonium compounds in dental materials: A systematic review. Dent Mater 2018; 34:851-867. [PMID: 29678327 DOI: 10.1016/j.dental.2018.03.014] [Citation(s) in RCA: 178] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 03/20/2018] [Accepted: 03/23/2018] [Indexed: 01/12/2023]
Abstract
OBJECTIVE Quaternary ammonium compounds (QACs) represent one of the most effective classes of disinfectant agents in dental materials and resin nanocomposites. This reviews aims to give a wide overview on the research in the field of antibacterial QACs in dental materials and nanocomposites. METHOD An introduction to dental materials components as well as the microorganisms and methods of evaluation for the antimicrobial assays are presented. Then, the properties and synthesis route of QACs, as monomer and filler, are shown. Finally, antimicrobial monomers and fillers, specifically those contain quaternary ammonium salts (QASs), in dental materials are reviewed. RESULTS QACs have been used as monomer and micro/nanofiller in restorative dentistry. They possess one or more methacrylate functional groups to participate in polymerization reactions. QACs with multiple methacrylate groups can also be used as crosslinking agents. Furthermore, QACs with chain length from ∼12 to 16 have higher antimicrobial activity in cured dental resins. In general, increasing the chain length leads to a threshold value (critical point) and then it causes decrease in the antimicrobial activity. SIGNIFICANCE The current state of the art of dental materials and resin nanocomposites includes a wide variety of antimicrobial materials. Among them, QACs presents low cytotoxicity and excellent long-term antimicrobial activity without leaching out over time.
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Affiliation(s)
- Pooyan Makvandi
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (CNR), Naples, Italy; Institute for Advanced Studies in Basic Sciences, Zanjan, Iran.
| | - Rezvan Jamaledin
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), Napels, Italy
| | - Mostafa Jabbari
- Swedish Centre for Resource Recovery, University of Borås, Borås SE-50190, Sweden
| | | | - Assunta Borzacchiello
- Institute for Polymers, Composites and Biomaterials (IPCB), National Research Council (CNR), Naples, Italy.
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Deying C, Ge H, Chuanjian Z, Jianhua G, Junling W. [Antibacterial dental adhesive containing nanoantibacterial inorganic fillers]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2018; 36:46-51. [PMID: 29594995 PMCID: PMC7030171 DOI: 10.7518/hxkq.2018.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 09/28/2017] [Indexed: 11/21/2022]
Abstract
OBJECTIVE This investigation aimed to develop a novel antibacterial dental adhesive containing nanoantibacterial inorganic fillers and measure the dentin bonding strength, mechanical properties, and antibacterial property of the novel adhesive in vitro. METHODS Novel nanoantibacterial inorganic fillers containing quaternary ammonium salt with long chain alkyl were synthesized on the basis of previous research. These novel nanoantibacterial inorganic fillers were added into the dental adhesive to prepare novel nanoantibacterial dental resin composite at mass fractions of 0%, 2.5%, 5.0%, 7.5%, and 10%; 0% was used as control. Dentin shear bonding test was used to evaluate the bonding strength. Flexural test was utilized to measure the novel resin composite flexural strength and elastic modulus. A dental plaque microcosm biofilm model with human saliva as inoculum was formed. Colony forming unit, lactic acid production, and live/dead assay of the biofilm on novel dental adhesive were calculated to assess the effect of novel dental adhesive on human dental plaque microcosm biofilm. RESULTS The dentin shear bond strength, flexural strength, and elastic modulus were 28.9 MPa, 86.6 MPa, and 4.2 GPa, respectively, when the nanoantibacterial inorganic filler mass fraction in the dental adhesive reached approximately 5.0%. Consequently, the dentin shear bond strength and mechanical properties significantly increased. Addition of 2.5% nanoantibacterial inorganic fillers into the dental adhesive exerted no adverse effect on the mechanical properties significantly (P>0.05). Dental adhesive containing 5% or more nanoantibacterial inorganic fillers inhibited the metabolic activity of the dental plaque microcosm biofilm significantly, thereby displaying a strong antibacterial potency (P<0.05). CONCLUSIONS This novel antibacterial dental adhesive, which contained 5.0% nanoantibacterial inorganic filler, exhibited promising bonding strength, mechanical property, and antibacterial ability. Hence, this adhesive can be potentially used in caries inhibition in dental application.
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Affiliation(s)
- Chen Deying
- Dept. of Prosthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan 250012, China
| | - Hu Ge
- Dept. of Prosthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan 250012, China
| | - Zhou Chuanjian
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Ge Jianhua
- Research Institute of Polymer Materials, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Wu Junling
- Dept. of Prosthodontics, School of Stomatology, Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Jinan 250012, China
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