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Daood U, Aati S, Akram Z, Yee J, Yong C, Parolia A, Lin Seow L, Fawzy AS. Characterization of multiscale interactions between high intensity focused ultrasound (HIFU) and tooth dentin: the effect on matrix-metalloproteinases, bacterial biofilms and biological properties. Biomater Sci 2021; 9:5344-5358. [PMID: 34190236 DOI: 10.1039/d1bm00555c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this study was to characterize multiscale interactions between high intensity focused ultrasound (HIFU) and dentin collagen and associated matrix-metalloproteinases, in addition to the analysis of the effect of HIFU on bacterial biofilms and biological properties. Dentin specimens were subjected to 5, 10 or 20 s HIFU. XPS spectra were acquired and TEM was performed on dentin slabs. Collagen orientation was performed using Raman spectroscopy. Calcium measurements in human dental pulpal cells (hDPCs) were carried out after 7 and 14 days. For macrophages, CD36+ and CD163+ were analysed. Biofilms were analyzed using CLSM. Tandem mass spectroscopy was performed for the detection of hydroxyproline sequences along with human MMP-2 quantification. Phosphorus, calcium, and nitrogen were detected in HIFU specimens. TEM images demonstrated the collagen network appearing to be fused together in the HIFU 10 and 20 s specimens. The band associated with 960 cm-1 corresponds to the stretching ν1 PO43-. The control specimens showed intensive calcium staining followed by HIFU 20 s > HIFU 10 s > HIFU 5 s specimens. Macrophages in the HIFU specimens co-expressed CD80+ and CD163+ cells. CLSM images showed the HIFU treatment inhibiting bacterial growth. SiteScore propensity determined the effect of HIFU on the binding site with a higher DScore representing better site exposure on MMPs. Multiscale mapping of dentin collagen after HIFU treatment showed no deleterious alterations on the organic structure of dentin.
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Affiliation(s)
- Umer Daood
- Clinical Dentistry, Restorative Division, Faculty of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Kuala Lumpur, Wilayah Persekutuan, Malaysia.
| | - Sultan Aati
- UWA Dental School, University of Western Australia, Nedlands, WA 6009, Australia.
| | - Zohaib Akram
- UWA Dental School, University of Western Australia, Nedlands, WA 6009, Australia.
| | - Joyce Yee
- Clinical Dentistry, Restorative Division, Faculty of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Kuala Lumpur, Wilayah Persekutuan, Malaysia.
| | - Celine Yong
- Clinical Dentistry, Restorative Division, Faculty of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Kuala Lumpur, Wilayah Persekutuan, Malaysia.
| | - Abhishek Parolia
- Clinical Dentistry, Restorative Division, Faculty of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Kuala Lumpur, Wilayah Persekutuan, Malaysia.
| | - Liang Lin Seow
- Clinical Dentistry, Restorative Division, Faculty of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Kuala Lumpur, Wilayah Persekutuan, Malaysia.
| | - Amr S Fawzy
- UWA Dental School, University of Western Australia, Nedlands, WA 6009, Australia.
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The effect of new anti-adhesive and antibacterial dental resin filling materials on gingival fibroblasts. Dent Mater 2021; 37:1416-1424. [PMID: 34253351 DOI: 10.1016/j.dental.2021.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 06/14/2021] [Accepted: 06/19/2021] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Aim of this study was to evaluate the biocompatibility of four experimental antiadhesive and antibacterial dental filling composites on human gingival fibroblasts (HGFs). METHODS For these experimental resin composites a delivery system based on novel polymeric hollow beads, loaded with Tego Protect (Aa1), Dimethicone (Aa2), Irgasan (Ab1) and methacrylated polymerizable Irgasan (Ab2) as active agents was used. The cultured HGFs' cell integrity, proliferation, viability, collagen synthesis and cytokine release were measured. For this purpose, human gingival fibroblasts were treated with eluates from all four composites and compared with an experimental standard composite (ST). Eluate extraction times 24 h and 168 h were chosen. RESULTS Statistical analysis was conducted via a mixed model. Both antibacterial composites reduced proliferation, collagen and cytokine synthesis significantly (p < 0.05), increasing with time of elution. Ab1 did also have a damaging effect on the membrane and on cell viability. SIGNIFICANCE Overall, it can be concluded that the antiadhesive composites showed clear advantages over the antibacterial composites in terms of biocompatibility. This study also continues to show the potential of the new poly-pore system, as it can be used for a variety of other applications in future composite mixtures.
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Tonguc Altin K, Topcuoglu N, Duman G, Unsal M, Celik A, Selvi Kuvvetli S, Kasikci E, Sahin F, Kulekci G. Antibacterial effects of saliva substitutes containing lysozyme or lactoferrin against Streptococcus mutans. Arch Oral Biol 2021; 129:105183. [PMID: 34091207 DOI: 10.1016/j.archoralbio.2021.105183] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To determine the antibacterial effects of different saliva-substitutes-containing-lysozyme(LYZ) or-lactoferrin(LF) on Streptococcus mutans(S. mutans) in comparison with human saliva. DESIGN In vitro wound-healing assay was performed with L929 mouse fibroblast cell line by using various concentrations of LYZ and LF to determine optimum concentrations and to confirm do not show any cytotoxicity of proteins according to cell culture studies. Antibacterial effect was assessed by determining Minimum Inhibitory Concentrations for all groups on S.mutans. Bacterial adhesion of S. mutans for 4 h on hydroxyapatite(HAP) discs after application of different saliva substitutes was evaluated. The formulations were:saliva-substitute(Group SS);saliva-substitute-containing-Lactoferrin(Group SSLF);saliva-substitute-containing-Lysozyme(Group SSLYZ). Human saliva was control group(Group HS). RESULTS In vitro wound healing assay results showed that, when added into the cell culture media, LYZ and LF significantly increase 48 -h scratch wound closure compared to the cell culture media(p < 0.0001). At the end of second day, samples treated with both between 2.5-100 μg/mL LF and 5-200 μg/mL LYZ were found to have significant wound healing effect(p < 001). It was observed that saliva-substitutes-containing-LYZ or-LF had antibacterial effects on S.mutans. Bacterial adhesion on HAP discs was observed significantly higher in control group than in study groups. The amount of adhered S. mutans was significantly higher in Group SS than other study groups(p < 0.0001). However, no statistically significant difference was found between the number of bacteria adhered to HAP discs between SSLYZ and SSLF groups(p > 0.05). CONCLUSIONS The study of cell viability and wound healing was great significance in the optimum concentrations of LYZ and LF. Among formulations, saliva-substitutes-containing-LYZ or-LF exhibited higher inhibitory effect on S.mutans.
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Affiliation(s)
- Kubra Tonguc Altin
- Yeditepe University, Faculty of Dentistry, Department of Pediatric Dentistry, Bağdat Caddesi, No: 238, 34728 Göztepe - Istanbul, Turkey.
| | - Nursen Topcuoglu
- Istanbul University, Faculty of Dentistry, Department of Oral Microbiology, Turgut Özal Caddesi (Millet Cd.), 34390 Istanbul, Turkey
| | - Gulengul Duman
- Yeditepe University, Faculty of Pharmacy, Department of Pharmaceutical Technology, 26 Ağustos Kampusu, Kayisdağı Caddesi, 34755 Atasehir - Istanbul, Turkey
| | - Melis Unsal
- Yeditepe University, Faculty of Dentistry, Department of Pediatric Dentistry, Bağdat Caddesi, No: 238, 34728 Göztepe - Istanbul, Turkey
| | - Ayse Celik
- Yeditepe University, Faculty of Dentistry, Department of Pediatric Dentistry, Bağdat Caddesi, No: 238, 34728 Göztepe - Istanbul, Turkey
| | - Senem Selvi Kuvvetli
- Yeditepe University, Faculty of Dentistry, Department of Pediatric Dentistry, Bağdat Caddesi, No: 238, 34728 Göztepe - Istanbul, Turkey
| | - Ezgi Kasikci
- Yeditepe University, Faculty of Engineering, Department of Genetics and Bioengineering, 26 Ağustos Kampusu, Kayisdağı Caddesi, 34755 Atasehir, Istanbul, Turkey; Department of Microbiology and Immunology, Albert Einstein College of Medicine, New York 10461, USA
| | - Fikrettin Sahin
- Yeditepe University, Faculty of Engineering, Department of Genetics and Bioengineering, 26 Ağustos Kampusu, Kayisdağı Caddesi, 34755 Atasehir, Istanbul, Turkey
| | - Guven Kulekci
- Istanbul University, Faculty of Dentistry, Department of Oral Microbiology, Turgut Özal Caddesi (Millet Cd.), 34390 Istanbul, Turkey
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Al-lehaibi WK, Al-makhzomi KA, Mohammed HS, Enezei HH, Alam MK. Physiological and Immunological Changes Associated with Oral Microbiota When Using a Thermoplastic Retainer. Molecules 2021; 26:molecules26071948. [PMID: 33808410 PMCID: PMC8036960 DOI: 10.3390/molecules26071948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/23/2021] [Accepted: 03/25/2021] [Indexed: 11/16/2022] Open
Abstract
Background: The study examined the oral microbiota, physiological and immunological changes in patients using thermoplastic retainers during three months of use. Methods: The study included several steps. Firstly, 10 swabs were collected from the buccal and palatal surfaces of the teeth of the patients, approximately 2 mL of saliva was collected from the same patients and 2 mL of saliva was collected from 10 healthy people to measure the pH and secretory IgA level. This was followed by the isolation and identfication of the bacterial isolates in the patient samples. Then, isolate susceptibility toward chlorhexidine (CHX) and their adhesion ability to thermoplastic retainer surfaces was measured. In addition to that the study estimated the numbers of Lactobacillus and Streptooccus mutans colonies during three months and finally, a comparsion of pH acidity and IgA level between the patients and healthy people was performed. The results showed the predominant bacteria during the three months were Lactobacillus spp. and Streptococcus spp. followed by different rates of other bacteria. Raoultella ornithinolytica showed more resistance to CHX while Lactobacillus spp. showed more sensitivity. Streptococcus mutans colony levels were higher than Lactobacillus spp. colonies during the three months, also S. mutans had the highest value in adherence to retainer thermoplastic. Finally, pH acidity showed a highly significant difference (p ≤ 0.05) in the third month, like IgA levels (p ≤ 0.05). Conclusions: According to the results obtained from the current study, the researchers noted that the thermoplastic retainers helped change the oral cavity environment.
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Affiliation(s)
- Wurood kh. Al-lehaibi
- Department of Pedodontic, Orthodontic and Preventive Dentistry, Dentistry Department, Dijlah University College, Baghdad 10011, Iraq
- Correspondence: (W.k.A.-l.); (M.K.A.)
| | - Khulood A. Al-makhzomi
- Department of Pedodontic, Orthodontic and Preventive Dentistry, College of Dentistry, Uruk University, Baghdad 10069, Iraq;
| | - Hani Sh. Mohammed
- Department of Oral Diagnosis, Al Ramadi Specialized Dental Center, Ministry of Health, Ramadi 31001, Iraq;
| | - Hamid Hammad Enezei
- Department of Oral & Maxillofacial Surgery, College of Dentistry, University of Anbar, Ramadi 31001, Iraq;
| | - Mohammad Khursheed Alam
- Orthodontic Division, Preventive Dentistry Department, College of Dentistry, Jouf University, Sakaka 72345, Saudi Arabia
- Correspondence: (W.k.A.-l.); (M.K.A.)
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Namura Y, Uchida Y, Sato R, Shimizu N, Motoyoshi M, Tsutsumi Y, Hanawa T, Yoneyama T. Changes in surface properties of dental alloys with atmospheric plasma irradiation. Dent Mater J 2020; 39:375-380. [PMID: 31852878 DOI: 10.4012/dmj.2019-023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Chemical transitions after atmospheric pressure plasma irradiation were investigated by evaluating intermolecular attractions and atomic and molecular reactions. Gold, titanium and stainless-steel alloy samples were ground with #800 grit SiC waterproof paper and nitrogen gas atmospheric plasma irradiation was conducted. The surface free energies of the treated alloys were calculated and compared statistically. X-ray photoelectron spectroscopy analysis was performed.The surface free energies of all metal surfaces treated by plasma irradiation were 1.5-times higher than those of the untreated metals. The energy of the hydrogen bonding component increased, and all alloy surfaces were coated with metal oxide after only a short period of plasma irradiation. The surfaces oxidized by plasma exhibited a high active energy, mainly due to an increase in the hydrogen bonding component. Reactions with oxygen in the air were promoted on the clean surfaces with exposed reactive elements.
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Affiliation(s)
- Yasuhiro Namura
- Department of Orthodontics, Nihon University School of Dentistry.,Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Yasuki Uchida
- Department of Orthodontics, Nihon University School of Dentistry.,Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Ryoichi Sato
- Department of Oral Structural and Functional Biology, Nihon University Graduate School of Dentistry
| | | | - Mitsuru Motoyoshi
- Department of Orthodontics, Nihon University School of Dentistry.,Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry
| | - Yusuke Tsutsumi
- Research Center for Structural Materials, National Institute for Materials Science.,Department of Metallic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University
| | - Takao Hanawa
- Department of Metallic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University
| | - Takayuki Yoneyama
- Department of Dental Materials, Nihon University School of Dentistry.,Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
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Afonso Camargo SE, Mohiuddeen AS, Fares C, Partain JL, Carey PH, Ren F, Hsu SM, Clark AE, Esquivel-Upshaw JF. Anti-Bacterial Properties and Biocompatibility of Novel SiC Coating for Dental Ceramic. J Funct Biomater 2020; 11:jfb11020033. [PMID: 32443691 PMCID: PMC7353563 DOI: 10.3390/jfb11020033] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/05/2020] [Accepted: 05/09/2020] [Indexed: 11/16/2022] Open
Abstract
A 200 nm plasma-enhanced chemical vapor-deposited SiC was used as a coating on dental ceramics to improve anti-bacterial properties for the applications of dental prosthesis. A thin SiO2 (20 nm) in the same system was deposited first, prior to SiC deposition, to improve the adhesion between SiC to dental ceramic. Silane and methane were the precursors for SiC deposition, and the SiO2 deposition employed silane and nitrous oxide as the precursors. SiC antimicrobial activity was evaluated on the proliferation of biofilm, Streptococcus sanguinis, and Streptococcus mutans on SiC-coated and uncoated dental ceramics for 24 h. The ceramic coating with SiC exhibited a biofilm coverage of 16.9%, whereas uncoated samples demonstrated a significantly higher biofilm coverage of 91.8%, measured with fluorescence and scanning electron microscopic images. The cytotoxicity of the SiC coating was evaluated using human periodontal ligament fibroblasts (HPdLF) by CellTiter-BlueCell viability assay. After 24 h of HPdLF cultivation, no obvious cytotoxicity was observed on the SiC coating and control group; both sets of samples exhibited similar cell adhesion and proliferation. SiC coating on a ceramic demonstrated antimicrobial activity without inducing cytotoxic effects.
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Affiliation(s)
- Samira Esteves Afonso Camargo
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Azeem S. Mohiuddeen
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Chaker Fares
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Jessica L. Partain
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Patrick H. Carey
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Fan Ren
- Department of Chemical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, FL 32611, USA; (C.F.); (J.L.P.); (P.H.C.IV); (F.R.)
| | - Shu-Min Hsu
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Arthur E. Clark
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
| | - Josephine F. Esquivel-Upshaw
- Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (S.E.A.C.); (A.S.M.); (S.-M.H.); (A.E.C.)
- Correspondence:
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Kanzow P, Baxter S, Rizk M, Wassmann T, Wiegand A. Effectiveness of a universal adhesive for repair bonding to composite and amalgam. J Oral Sci 2019; 61:343-350. [PMID: 31217385 DOI: 10.2334/josnusd.18-0301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The study aimed to compare the repair bond strength of aged composite and amalgam repaired with resin composite after various mechanical and adhesive surface treatments. Specimens were aged by thermal cycling (10,000 cycles, 5-55°C) and randomly subjected to one of three surface treatments: diamond bur abrasion, aluminum oxide air abrasion, or silica coating. Conventional bonding or a universal adhesive with incorporated silane was applied afterward (each n = 16) and resin composite was attached. In the control groups (each n = 16), resin composite was attached using one of the above adhesives without prior mechanical surface conditioning. After further thermal cycling, the shear bond strength (SBS) and failure modes were assessed. Statistical analyses were performed using ANOVA, Weibull statistics, two sample t-tests, and Chi2-test (P < 0.05). The SBS of the repaired amalgam was significantly lower than that of the composite and mechanical pretreatment significantly increased SBS. The universal adhesive significantly improved the SBS of the repaired amalgam compared to the conventional bonding agent and mechanical pretreatment increased the number of cohesive/mixed failures. Amalgam restorations may be repaired using resin composites, but the resulting SBS is lower than that obtained with composite.
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Affiliation(s)
- Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Steffi Baxter
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Marta Rizk
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Torsten Wassmann
- Department of Prosthodontics, University Medical Center Göttingen
| | - Annette Wiegand
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
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8
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Effect of Saliva and Mucin-Based Saliva Substitutes on Fretting Processes of 316 Austenitic Stainless Steel. METALS 2019. [DOI: 10.3390/met9020178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The paper presents the results of research of the fretting process of 316 austenitic stainless steel in the environment of natural saliva and mucin-based saliva preparations. The aim of the work was the evaluation of synthetic saliva preparations on biomaterial wear during fretting and fretting-corrosion. The fretting process, in the oscillatory micro-movements conditions, occurs in the joints of removable dentures, especially during the chewing phase. Fretting usually leads to the intensification of fatigue damage processes of materials. Experimental research, through rheological, fretting, fretting-corrosion, and microscopic analysis were performed. Tests indicate that natural saliva and saliva preparations are similar in terms of viscoelastic properties. The statistically significant proposed saliva solutions reduced the material wear in comparison to dry sliding, which is important in the case of people with saliva secretion problem. The addition of xanthan gum to the artificial saliva composition improved rheological characteristics, but on the other hand, led to an increase of secondary wear. It was confirmed by the volumetric wear of the samples and evaluation of energy dissipated during friction. Fretting-corrosion processes were explained by a mechanism related to crevice corrosion supported by friction.
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Maquera-Huacho PM, Tonon CC, Correia MF, Francisconi RS, Bordini EAF, Marcantonio É, Spolidorio DMP. In vitro antibacterial and cytotoxic activities of carvacrol and terpinen-4-ol against biofilm formation on titanium implant surfaces. BIOFOULING 2018; 34:699-709. [PMID: 30187780 DOI: 10.1080/08927014.2018.1485892] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/30/2018] [Indexed: 06/08/2023]
Abstract
This study evaluated the antibacterial properties of carvacrol and terpinen-4-ol against Porphyromonas gingivalis and Fusobacterium nucleatum and its cytotoxic effects on fibroblast cells. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were examined. The minimum biofilm inhibition concentration (MBIC) was evaluated by XTT assay. Biofilm decontamination on titanium surfaces was quantified (CFU ml-1), evaluated by confocal laser scanning microscopy (CLSM) and cytotoxic activity by MTT. The MIC and MBC for carvacrol were 0.007% and 0.002% for P. gingivalis and F. nucleatum, and 0.06% for terpinen-4-ol for both microorganisms. The MBIC for carvacrol was 0.03% and 0.06% for P. gingivalis and F. nucleatum, and for terpinen-4-ol was 0.06% and 0.24%. The results indicated anti-biofilm activity using carvacrol (0.26%, 0.06%) and terpinen-4-ol (0.95%, 0.24%) and showed cytotoxic activity similar to chlorohexidine (CHX). However, terpinen-4-ol (0.24%) showed higher cell viability than other treatments. Carvacrol and terpinen-4-ol showed antibacterial activity in respect of reducing biofilms. Moreover, CHX-like cytotoxicity was observed.
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Affiliation(s)
- Patricia Milagros Maquera-Huacho
- a Department of Oral Diagnosis and Surgery, School of Dentistry , São Paulo State University (Unesp) , Araraquara , São Paulo , Brazil
| | - Caroline Coradi Tonon
- a Department of Oral Diagnosis and Surgery, School of Dentistry , São Paulo State University (Unesp) , Araraquara , São Paulo , Brazil
| | - Marilia Ferreira Correia
- b Department of Physiology and Pathology, School of Dentistry , São Paulo State University (Unesp) , Araraquara, São Paulo , Brazil
| | - Renata Serignoli Francisconi
- b Department of Physiology and Pathology, School of Dentistry , São Paulo State University (Unesp) , Araraquara, São Paulo , Brazil
| | - Ester Alves Ferreira Bordini
- c Department of Dental Materials and Prosthodontics, School of Dentistry , São Paulo State University (Unesp) , Araraquara , São Paulo , Brazil
| | - Élcio Marcantonio
- a Department of Oral Diagnosis and Surgery, School of Dentistry , São Paulo State University (Unesp) , Araraquara , São Paulo , Brazil
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Wessel SW, van der Mei HC, Slomp AM, van de Belt-Gritter B, Dodds MWJ, Busscher HJ. Self-perceived mouthfeel and physico-chemical surface effects after chewing gums containing sorbitol and Magnolia bark extract. Eur J Oral Sci 2017; 125:379-384. [PMID: 28857279 DOI: 10.1111/eos.12370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The European Food Safety Authority recognizes the contribution of sugar-free chewing gum to oral health through increased salivation, clearance of food debris, and neutralization of biofilm pH. Magnolia bark extract is a gum additive shown to reduce the prevalence of bad-breath bacteria but its effects on self-perceived mouthfeel are unknown. This paper aims to relate the effects of sorbitol-containing chewing gum, with and without Magnolia bark extract, on tooth-surface hydrophobicity and salivary-film composition with self-perceived mouthfeel. In a crossover clinical trial, volunteers chewed sorbitol-containing gum, with or without Magnolia bark extract added, three times daily during a 4-wk time period. A subset of volunteers also chewed Parafilm as a mastication control. Oral moistness and tooth smoothness were assessed using questionnaires, and intra-oral water-contact angles were measured before, immediately after, and 60 min after, chewing. Simultaneously, saliva samples were collected, placed on glass slides, and the compositions of the adsorbed film were measured using X-ray photoelectron spectroscopy. Chewing of gum, regardless of whether or not it contained Magnolia bark extract, improved self-perceived mouthfeel up to 60 min, concurrent with a more hydrophilic tooth surface and an increased amount of O1s electrons bound at 532.6 eV in salivary films. Chewing of Parafilm affected neither tooth-surface hydrophobicity nor salivary-film composition. Accordingly, adsorption of sorbitol, rather than the presence of Magnolia bark extract or increased salivation, is responsible for improved self-perceived mouthfeel.
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Affiliation(s)
- Stefan W Wessel
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - Henny C van der Mei
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - Anje M Slomp
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - Betsy van de Belt-Gritter
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | | | - Henk J Busscher
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
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Shirato M, Nakamura K, Kanno T, Lingström P, Niwano Y, Örtengren U. Time-kill kinetic analysis of antimicrobial chemotherapy based on hydrogen peroxide photolysis against Streptococcus mutans biofilm. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:434-440. [DOI: 10.1016/j.jphotobiol.2017.06.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 01/01/2023]
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12
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Photo-irradiated caffeic acid exhibits antimicrobial activity against Streptococcus mutans biofilms via hydroxyl radical formation. Sci Rep 2017; 7:6353. [PMID: 28743937 PMCID: PMC5527086 DOI: 10.1038/s41598-017-07007-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 06/20/2017] [Indexed: 11/23/2022] Open
Abstract
An antimicrobial technique based on photo-oxidation of caffeic acid (CA) has recently been developed, but its effect on biofilm-forming bacteria is unknown. The present study aimed to evaluate the effect of photo-irradiated CA against Streptococcus mutans (cariogenic bacteria) biofilm as it relates to hydroxyl radical formation. S. mutans biofilms grown on hydroxyapatite disks were immersed in CA solution (0–2 mg/mL) and irradiated with LED light at wavelengths of 365, 385, and 400 nm and at irradiances of 500, 1000, and 2000 mW/cm2 for 4 min. Biofilm viable bacterial counts were determined by colony counting. The yield of hydroxyl radicals generated by the LED irradiation of CA solution was quantified by electron spin resonance analysis. Of the conditions tested, the highest bactericidal effect, with a > 5-log reduction in viable bacterial counts, was obtained by irradiation of a 1 mg/mL CA solution with 385 nm LED and at an irradiance of 2000 mW/cm2. Hydroxyl radical formation was related to this bactericidal effect. The present study suggests that the antimicrobial technique based on the 385 nm LED irradiation of CA is effective against cariogenic biofilms and can be applied as an adjunctive chemotherapy for dental caries.
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Elgamily H, Moussa A, Elboraey A, El-Sayed H, Al-Moghazy M, Abdalla A. Microbiological Assessment of Moringa Oleifera Extracts and Its Incorporation in Novel Dental Remedies against Some Oral Pathogens. Open Access Maced J Med Sci 2016; 4:585-590. [PMID: 28028395 PMCID: PMC5175503 DOI: 10.3889/oamjms.2016.132] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 11/05/2016] [Accepted: 11/06/2016] [Indexed: 12/02/2022] Open
Abstract
AIM: To assess the antibacterial and antifungal potentials of different parts of Moringa oleifera plant using different extraction methods in attempts to formulate natural dental remedies from this plant. MATERIAL AND METHODS: Three solvents extracts (Ethanol, acetone, and ethyl acetate) of different parts of Egyptian Moringa tree were prepared and tested against oral pathogens: Staphylococcus aureus, Streptococcus mutans, and Candida albicans using disc diffusion method; As well as to incorporate the plant extract to formulate experimental toothpaste and mouthwash. The two dental remedies were assessed against the same microbial strains. Statistical analysis was performed using One-Way ANOVA test to compare the inhibition zone diameter and t-test. RESULTS: Ethanol extracts as well as leaves extracts demonstrated the highest significant mean inhibition zone values (P ≤ 0.05) against Staphylococcus aureus and Streptococcus mutans growth. However, all extracts revealed no inhibition zone against Candida albicans. For dental remedies, experimental toothpaste exhibited higher mean inhibition than the mouthwash against Staphylococcus aureus, Streptococcus mutans and only the toothpaste revealed antifungal effect against Candida albicans. CONCLUSION: The different extracts of different parts of Moringa showed an antibacterial effect against Staphylococcus aureus and Streptococcus mutans growth. The novel toothpaste of ethanolic leaves extract has antimicrobial and antifungal potential effects all selected strains.
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Affiliation(s)
- Hanaa Elgamily
- National Research Centre, Restorative Dentistry and Dental Material Research Department, Giza, Egypt
| | - Amani Moussa
- National Research Centre, Prosthodontics, Giza, Egypt
| | | | - Hoda El-Sayed
- National Research Centre, Dairy Science Department (Microbiology Lab.), Food Industries and Nutrition Division, Giza, Egypt
| | - Marwa Al-Moghazy
- National Research Centre, Dairy Science Department (Microbiology Lab.), Food Industries and Nutrition Division, Giza, Egypt
| | - Aboelfetoh Abdalla
- National Research Centre, Technology of Horticulture Crops Department, Agriculture Research Division, Giza, Egypt
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Yuan C, Wang X, Gao X, Chen F, Liang X, Li D. Effects of surface properties of polymer-based restorative materials on early adhesion of Streptococcus mutans in vitro. J Dent 2016; 54:33-40. [DOI: 10.1016/j.jdent.2016.07.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 07/13/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022] Open
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Nakamura K, Shirato M, Kanno T, Örtengren U, Lingström P, Niwano Y. Antimicrobial activity of hydroxyl radicals generated by hydrogen peroxide photolysis against Streptococcus mutans biofilm. Int J Antimicrob Agents 2016; 48:373-80. [DOI: 10.1016/j.ijantimicag.2016.06.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/31/2016] [Accepted: 06/05/2016] [Indexed: 10/21/2022]
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de Avila ED, de Molon RS, Lima BP, Lux R, Shi W, Junior MJ, Spolidorio DMP, Vergani CE, de Assis Mollo Junior F. Impact of Physical Chemical Characteristics of Abutment Implant Surfaces on Bacteria Adhesion. J ORAL IMPLANTOL 2016; 42:153-8. [DOI: 10.1563/aaid-joi-d-14-00318] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Surface attachment is the first step in biofilm formation, and the ability of bacteria to adhere to surfaces and develop a biofilm is directly influenced by electrostatic interactions between the bacteria and the chemical composition of material surfaces. Here, we investigated the influence of physical and chemical characteristics of titanium (Ti) and zirconia (ZrO2) as implant abutment surfaces on the bacterial adhesion phase and compared the results to bovine enamel (BE) simulating a human tooth. To achieve this goal, we used 2 common pathogens of the oral cavity, Streptococcus mutans UA140 and Porphyromonas gingivalis 33277. To investigate the influence of material surfaces on bacterial adhesion, we studied the surface free energy as well as the topography by atomic force microscopy, and the chemical elements composition by scanning electron microscopy equipped with an energy dispersive X-ray spectroscope. Our results indicated a hydrophobic characteristic for all of the materials; however, the presence of polar and nonpolar components could aid in understanding why greater numbers of bacteria had adhered to BE compared to the other surfaces. Our confocal microscopy data support the proposition that electrostatic interactions, indeed, affected the initial adhesion phase. Within the limitations of a laboratory study, the results revealed bacterial adhered on BE and no bacteria could be observed by confocal images on Ti and ZrO2 implant abutment surfaces.
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Affiliation(s)
- Erica Dorigatti de Avila
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - Araraquara, Brazil
- Division of Oral Biology and Medicine, University of California School of Dentistry, Los Angeles, Calif
| | - Rafael Scaf de Molon
- Department of Diagnostic and Surgery, School of Dentistry at Araraquara, São Paulo State University, Araraquara, Brazil
- Division of Diagnostic Surgical Science, University of California School of Dentistry, Los Angeles, Calif
| | - Bruno P. Lima
- Division of Oral Biology and Medicine, University of California School of Dentistry, Los Angeles, Calif
| | - Renate Lux
- Division of Oral Biology and Medicine, University of California School of Dentistry, Los Angeles, Calif
- Division of Constitutive and Regenerative Sciences, University of California School of Dentistry, Los Angeles, Calif
| | - Wenyuan Shi
- Division of Oral Biology and Medicine, University of California School of Dentistry, Los Angeles, Calif
| | - Miguel Jafelicci Junior
- Department of Physical Chemical, Chemical Institute, São Paulo State University, Araraquara, Brazil
| | | | - Carlos Eduardo Vergani
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - Araraquara, Brazil
| | - Francisco de Assis Mollo Junior
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - Araraquara, Brazil
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Song L, Hou J, van der Mei H, Veeregowda D, Busscher H, Sjollema J. Antimicrobials Influence Bond Stiffness and Detachment of Oral Bacteria. J Dent Res 2016; 95:793-9. [DOI: 10.1177/0022034516634631] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Oral biofilm can never be fully removed by oral hygiene measures. Biofilm left behind after brushing is often left behind on the same sites and exposed multiple times to antimicrobials from toothpastes and mouthrinses, after which removal becomes increasingly difficult. On the basis of this observation, we hypothesize that oral bacteria adhering to salivary conditioning films become more difficult to remove after adsorption of antimicrobials due to stiffening of their adhesive bond. To verify this hypothesis, bacteria adhering to bare and saliva-coated glass were exposed to 3 different mouthrinses, containing chlorhexidine-digluconate, cetylpyridinium-chloride, or amine-fluoride, after which bacterial vibration spectroscopy was carried out or a liquid-air interface was passed over the adhering bacteria to stimulate their detachment. Brownian motion–induced nanoscopic vibration amplitudes of 4 oral streptococcal strains, reflecting their bond stiffness, decreased after exposure to mouthrinses. Concurrently, the percentage detachment of adhering bacteria upon the passage of a liquid-air interface decreased after exposure to mouthrinses. A buffer control left both vibration amplitudes and detachment percentages unaffected. Exposure to either of the selected mouthrinses yielded more positively charged bacteria by particulate microelectrophoresis, suggesting antimicrobial adsorption to bacterial cell surface components. To rule out that exposure of adhering bacteria to the mouthrinses stimulated polysaccharide production with an impact on their detachment, Fourier transform infrared spectroscopy was carried out on bacteria adhering to an internal reflection element, prior to and after exposure to the mouthrinses. Infrared absorption band areas indicated no significant change in amount of polysaccharides after exposure of adhering bacteria to mouthrinses, but wave number shifts demonstrated stiffening of polysaccharides in the bond, as a result of antimicrobial adsorption to the bacterial cell surface and in line with changes in surface charge. Clinically, these findings suggest that accumulation of oral biofilm exposed to antimicrobials should be prevented (interdental cleaning aids, floss use), as removal becomes progressively more difficult upon multiple exposures.
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Affiliation(s)
- L. Song
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
| | - J. Hou
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
| | - H.C. van der Mei
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
| | - D.H. Veeregowda
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
| | - H.J. Busscher
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
| | - J. Sjollema
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, AV Groningen, the Netherlands
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Brambilla E, Ionescu A, Mazzoni A, Cadenaro M, Gagliani M, Ferraroni M, Tay F, Pashley D, Breschi L. Hydrophilicity of dentin bonding systems influences in vitro Streptococcus mutans biofilm formation. Dent Mater 2014; 30:926-35. [PMID: 24954666 PMCID: PMC4128410 DOI: 10.1016/j.dental.2014.05.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 05/10/2014] [Accepted: 05/21/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To evaluate in vitro Streptococcus mutans (S. mutans) biofilm formation on the surface of five light-curing experimental dental bonding systems (DBS) with increasing hydrophilicity. The null hypothesis tested was that resin chemical composition and hydrophilicity does not affect S. mutans biofilm formation. METHODS Five light-curing versions of experimental resin blends with increasing hydrophilicity were investigated (R1, R2, R3, R4 and R5). R1 and R2 contained ethoxylated BisGMA/TEGDMA or BisGMA/TEGDMA, respectively, and were very hydrophobic, were representative of pit-and-fissure bonding agents. R3 was representative of a typical two-step etch-and-rinse adhesive, while R4 and R5 were very hydrophilic resins analogous to self-etching adhesives. Twenty-eight disks were prepared for each resin blend. After a 24h-incubation at 37°C, a multilayer monospecific biofilm of S. mutans was obtained on the surface of each disk. The adherent biomass was determined using the MTT assay and evaluated morphologically with confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). RESULTS R2 and R3 surfaces showed the highest biofilm formation while R1 and R4 showed a similar intermediate biofilm formation. R5 was more hydrophilic and acidic and was significantly less colonized than all the other resins. A significant quadratic relationship between biofilm formation and hydrophilicity of the resin blends was found. CLSM and SEM evaluation confirmed MTT assay results. CONCLUSIONS The null hypothesis was rejected since S. mutans biofilm formation was influenced by hydrophilicity, surface acidity and chemical composition of the experimental resins. Further studies using a bioreactor are needed to confirm the results and clarify the role of the single factors.
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Affiliation(s)
| | - Andrei Ionescu
- Department of Health Sciences, University of Milan, Milan, Italy
| | - Annalisa Mazzoni
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Milena Cadenaro
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Massimo Gagliani
- Department of Health Sciences, University of Milan, Milan, Italy
| | - Monica Ferraroni
- Dipartimento di Medicina del Lavoro, University of Milan, Milan, Italy
| | - Franklin Tay
- Department of Oral Biology, College of Dental Medicine, Georgia Health Sciences University, Augusta, GA, USA
| | - David Pashley
- Department of Oral Biology, College of Dental Medicine, Georgia Health Sciences University, Augusta, GA, USA
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Alma Mater Studiorum, Bologna, Italy.
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Rüttermann S, Beikler T, Janda R. Contact angle and surface free energy of experimental resin-based dental restorative materials after chewing simulation. Dent Mater 2014; 30:702-7. [DOI: 10.1016/j.dental.2014.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 01/23/2014] [Accepted: 03/25/2014] [Indexed: 12/01/2022]
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Kałużny J, Wierzbicka M, Nogala H, Milecki P, Kopeć T. Radiotherapy induced xerostomia: Mechanisms, diagnostics, prevention and treatment – Evidence based up to 2013. Otolaryngol Pol 2014; 68:1-14. [DOI: 10.1016/j.otpol.2013.09.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 09/12/2013] [Indexed: 11/28/2022]
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Rüttermann S, Trellenkamp T, Bergmann N, Beikler T, Ritter H, Janda R. Bacterial viability and physical properties of antibacterially modified experimental dental resin composites. PLoS One 2013; 8:e79119. [PMID: 24223890 PMCID: PMC3815119 DOI: 10.1371/journal.pone.0079119] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 09/19/2013] [Indexed: 11/18/2022] Open
Abstract
PURPOSE To investigate the antibacterial effect and the effect on the material properties of a novel delivery system with Irgasan as active agent and methacrylated polymerizable Irgasan when added to experimental dental resin composites. MATERIALS AND METHODS A delivery system based on novel polymeric hollow beads, loaded with Irgasan and methacrylated polymerizable Irgasan as active agents were used to manufacture three commonly formulated experimental resin composites. The non-modified resin was used as standard (ST). Material A contained the delivery system providing 4 % (m/m) Irgasan, material B contained 4 % (m/m) methacrylated Irgasan and material C 8 % (m/m) methacrylated Irgasan. Flexural strength (FS), flexural modulus (FM), water sorption (WS), solubility (SL), surface roughness Ra, polymerization shrinkage, contact angle Θ, total surface free energy γS and its apolar γS (LW), polar γS (AB), Lewis acid γS (+)and base γS (-) term as well as bacterial viability were determined. Significance was p < 0.05. RESULTS The materials A to C were not unacceptably influenced by the modifications and achieved the minimum values for FS, WS and SL as requested by EN ISO 4049 and did not differ from ST what was also found for Ra. Only A had lower FM than ST. Θ of A and C was higher and γS (AB) of A and B was lower than of ST. Materials A to C had higher γS (+) than ST. The antibacterial effect of materials A to C was significantly increased when compared with ST meaning that significantly less vital cells were found. CONCLUSION Dental resin composites with small quantities of a novel antibacterially doped delivery system or with an antibacterial monomer provided acceptable physical properties and good antibacterial effectiveness. The sorption material being part of the delivery system can be used as a vehicle for any other active agent.
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Affiliation(s)
- Stefan Rüttermann
- Heinrich-Heine-University, Medical Faculty, Centre of Dentistry, Department of Operative Dentistry, Periodontology and Endodontics, Düsseldorf, Germany
- * E-mail:
| | - Taina Trellenkamp
- Heinrich-Heine-University, Institute of Organic Chemistry and Macromolecular Chemistry, Düsseldorf, Germany
| | - Nora Bergmann
- Heinrich-Heine-University, Medical Faculty, Centre of Dentistry, Department of Operative Dentistry, Periodontology and Endodontics, Düsseldorf, Germany
| | - Thomas Beikler
- Heinrich-Heine-University, Medical Faculty, Centre of Dentistry, Department of Operative Dentistry, Periodontology and Endodontics, Düsseldorf, Germany
| | - Helmut Ritter
- Heinrich-Heine-University, Institute of Organic Chemistry and Macromolecular Chemistry, Düsseldorf, Germany
| | - Ralf Janda
- Heinrich-Heine-University, Medical Faculty, Centre of Dentistry, Department of Operative Dentistry, Periodontology and Endodontics, Düsseldorf, Germany
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Bacterial viability on surface-modified resin-based dental restorative materials. Arch Oral Biol 2012; 57:1512-21. [DOI: 10.1016/j.archoralbio.2012.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 04/25/2012] [Accepted: 05/07/2012] [Indexed: 11/22/2022]
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Influence of thermoplastic retainers on Streptococcus mutans and Lactobacillus adhesion. Am J Orthod Dentofacial Orthop 2012; 141:598-603. [PMID: 22554754 DOI: 10.1016/j.ajodo.2011.11.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 11/01/2011] [Accepted: 11/01/2011] [Indexed: 11/22/2022]
Abstract
INTRODUCTION This study was designed to test the hypothesis that thermoplastic retainers influence oral microbial flora during the retention period because they prevent the flushing effect of saliva on dental and mucous tissues. METHODS Twenty-four orthodontic patients finished the study. After debonding, the patients were given thermoplastic retainers (Essix ACE 0.040-in plastic, Dentsply International, York, Pa) for both jaws and instructed to wear them all day. Plaque samples from tooth surfaces and saliva samples were collected from each patient just after debonding (T0), and on day 15 (T1), day 30 (T2), and day 60 (T3) of retention. The jaws were divided into 6 regions, and the data for each region were evaluated separately. Total viable Lactobacillus and Streptococcus mutans colonies were counted, and the numbers of the viable microorganisms were calculated. RESULTS The numbers of Lactobacillus colonies at T3 were higher than at T0, T1, and T2, and the difference between T0 and T3 was statistically significant (P <0.05). The numbers of S mutans colonies at T3 were higher than at T0, T1, and T2, and the differences between T0 and T1, and T1 and T2 were statistically significant (P <0.05). CONCLUSIONS Retention with thermoplastic retainers might create oral conditions conducive to S mutans and Lactobacillus colonization on dental surfaces.
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A new approach to influence contact angle and surface free energy of resin-based dental restorative materials. Acta Biomater 2011; 7:1160-5. [PMID: 20933616 DOI: 10.1016/j.actbio.2010.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 10/04/2010] [Indexed: 11/23/2022]
Abstract
The purpose of the present study was to identify novel delivery systems and active agents which increase the water contact angle and reduce the surface free energy when added to resin-based dental restorative materials. Two delivery systems based on zeolite or novel polymeric hollow beads (Poly-Pore), loaded with two low surface tension active agents (hydroxy functional polydimethylsiloxane and polydimethylsiloxane) or a polymerizable active agent (silicone polyether acrylate) were used to modify commonly formulated experimental dental resin composites. The non-modified resin was used as a standard (ST). Flexural strength, flexural modulus, water sorption, solubility, polymerization shrinkage, surface roughness Ra, contact angle θ, total surface free energy γS, and the apolar γSLW, polar γSAB, Lewis acid γS+ and base γS- components, and the active agents surface tensions γL were determined (P<0.05). The active agents did not differ in γL. The modified materials had significantly higher θ but significantly lower γS, γSAB and γS- than the ST. A Poly-Pore/polydimethyl siloxane delivery system yielded the highest θ (110.9±3.5°) acceptable physical properties and the lowest values for γSLW and γS-. Among the modified materials the polymerizable materials containing active agents had the lowest γAB and the highest γS+ and γS-. Although not significant, both of the zeolite delivery systems yielded higher γSLW, γS+ and γS- but lower γSAB than the Poly-Pore delivery systems. Poly-Pore based delivery systems highly loaded with low surface tension active agents were found not to influence the physical properties but to significantly increase the water contact angle and thus reduce surface free energy of dental resin composites.
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Influence of saliva substitute films on the initial adhesion of Candida albicans to dental substrata prior to and after artificial ageing. Arch Oral Biol 2010; 55:391-6. [DOI: 10.1016/j.archoralbio.2010.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 01/22/2010] [Accepted: 03/01/2010] [Indexed: 11/20/2022]
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Hahnel S, Behr M, Handel G, Bürgers R. Saliva substitutes for the treatment of radiation-induced xerostomia--a review. Support Care Cancer 2009; 17:1331-43. [PMID: 19495809 DOI: 10.1007/s00520-009-0671-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Accepted: 05/21/2009] [Indexed: 11/28/2022]
Abstract
GOAL The aim of this review is to summarize the in vitro and in vivo evidence on the performance of contemporary saliva substitutes in the treatment of xerostomia and hyposalivation caused by radiation therapy for head and neck malignancies. METHODS A literature search was conducted during July to September 2008 in PubMed, using the query terms "saliva substitute", "saliva substitute and xerostomia", "artificial saliva", and "artificial saliva and xerostomia"; for clinical studies, only studies in patients suffering from radiation-induced xerostomia have been included in the review. RESULTS AND CONCLUSION Fifty-two studies met the inclusion criteria and were allotted either to the in vitro topics "viscosity", "lubrication", "wetting properties", "antimicrobial effects", and "enamel and dentin de- and remineralization", or to the in vivo topics "clinical acceptance" or "influence on plaque formation and oral mucosa and microflora". The findings suggest that there are significant differences in the performance of various saliva substitutes concerning the review parameters, yet indicate that further in vitro and in vivo studies on the properties of saliva substitutes are necessary.
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Affiliation(s)
- Sebastian Hahnel
- Department of Prosthetic Dentistry, Regensburg University Medical Center, 93042 Regensburg, Germany.
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Bürgers R, Eidt A, Frankenberger R, Rosentritt M, Schweikl H, Handel G, Hahnel S. The anti-adherence activity and bactericidal effect of microparticulate silver additives in composite resin materials. Arch Oral Biol 2009; 54:595-601. [DOI: 10.1016/j.archoralbio.2009.03.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Revised: 02/02/2009] [Accepted: 03/14/2009] [Indexed: 10/20/2022]
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