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Marques Ferreira de Sena L, Monielle Duarte Moura D, Helena Gurgel de Carvalho I, de Fatima Dantas de Almeida L, Ramos da Silva N, Othávio de Assunção E Souza R. Bond strength, degree of conversion, and microorganism adhesion using different bracket-to-enamel bonding protocols. J Orofac Orthop 2023; 84:210-221. [PMID: 36251054 DOI: 10.1007/s00056-022-00430-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 08/16/2022] [Indexed: 10/24/2022]
Abstract
PURPOSE This study aimed to evaluate the effect of bonding protocols and the type of orthodontic resin on the adhesion of microorganisms, degree of conversion (DC), and shear bond strength (SBS) of metallic brackets to enamel. METHODS A total of 60 bovine incisors were prepared and randomly divided into 6 groups (n = 10): "bonding protocol" (A: phosphoric acid; AXT: A+Transbond™ XT primer adhesive [all Transbond™ products from 3M Unitek, Monrovia, CA, USA]; and SE: Transbond™ Plus Self Etching Primer) and "orthodontic resin" (XT: Transbond™ XT adhesive paste and CC: Transbond™ Plus Color Change). After bonding, the samples were subjected to thermocycling (5000 cycles) and to the SBS test. Bond failures were classified according to the adhesive remnant index (ARI). Next, 60 enamel blocks were sterilized in ethylene oxide in order to perform the CFU (Streptococcus mutans) assay in vitro to analyze the colony forming units (CFU/mL). Then, 60 discs of each orthodontic resin were made to measure the DC. The SBS (MPa), CFU/mL, and DC (%) data were statistically analyzed by two-way analysis of variance and Tukey's test (5%) was performed for the DC. RESULTS CFU and SBS revealed no significance for all factors (P > 0.05). Tukey's test showed that A_XT (acid+Transbond™ XT adhesive paste) presented the highest DC (70.38% ± 10.5), while AXT_XT (acid+Transbond™ XT primer adhesive+Transbond™ XT adhesive paste) showed the lowest (23.47% ± 10.4). An ARI score of 2 was more frequent for the CC resin and an ARI score of 4 for the XT resin. CONCLUSION The CC resin does not reduce adhesion of S. mutans around orthodontic brackets and the bonding protocol did not influence the SBS, although the SE and A_XT groups contributed to a better DC.
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Affiliation(s)
| | - Dayanne Monielle Duarte Moura
- Department of Dentistry, Federal University of Rio Grande do Norte, Av. Salgado Filho, 1787, 59056-000, Natal, RN, Brazil
- Department of Dentistry, State University of Rio Grande do Norte, Av Rio Branco, 725, RN, 59300-000, Caicó, Brazil
| | | | | | - Nathalia Ramos da Silva
- Department of Dentistry, Federal University of Rio Grande do Norte, Av. Salgado Filho, 1787, 59056-000, Natal, RN, Brazil
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Wolfoviz-Zilberman A, Kraitman R, Hazan R, Friedman M, Houri-Haddad Y, Beyth N. Phage Targeting Streptococcus mutans In Vitro and In Vivo as a Caries-Preventive Modality. Antibiotics (Basel) 2021; 10:antibiotics10081015. [PMID: 34439064 PMCID: PMC8389033 DOI: 10.3390/antibiotics10081015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/16/2021] [Accepted: 08/18/2021] [Indexed: 12/20/2022] Open
Abstract
Dental caries is a common infectious disease worldwide. Current conventional therapies lack specific antimicrobial effects against Streptococcus mutans, a key bacterium that induces caries. A promising alternative approach is bacteriophage (phage) therapy. Recently, SMHBZ8 phage targeting S. mutans was isolated and characterized. The aim of this study was to evaluate the caries-prevention efficacy of SMHBZ8 using in vitro and in vivo caries models. Hemi-mandibles dissected from euthanized healthy mice were subjected to caries-promoting conditions in vitro. Jaws treated with phage therapy in suspension and in formulation with a sustained-release delivery system showed no carious lesions, similar to control and chlorhexidine-treated jaws. Subsequently, SMHBZ8 phage suspension also prevented carious lesion development in a murine caries model in vivo. In both models, caries lesions were analyzed clinically and radiographically by µCT scans. This study shows how SMHBZ8 phage therapy targeting S. mutans can serve as an efficient caries-prevention modality, in suspension or with a sustained-release delivery system, by in vitro and in vivo mouse models.
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Affiliation(s)
- Amit Wolfoviz-Zilberman
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (A.W.-Z.); (R.K.); (Y.H.-H.)
- Institute of Biomedical and Oral Research (IBOR), Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel;
| | - Reut Kraitman
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (A.W.-Z.); (R.K.); (Y.H.-H.)
- Institute of Biomedical and Oral Research (IBOR), Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel;
| | - Ronen Hazan
- Institute of Biomedical and Oral Research (IBOR), Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel;
| | - Michael Friedman
- Department of Pharmaceutics, The Institute for Drug Research, Faculty of Medicine, The Hebrew University, Jerusalem 91120, Israel;
| | - Yael Houri-Haddad
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (A.W.-Z.); (R.K.); (Y.H.-H.)
| | - Nurit Beyth
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (A.W.-Z.); (R.K.); (Y.H.-H.)
- Correspondence:
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Condò R, Mampieri G, Pasquantonio G, Giancotti A, Pirelli P, Cataldi ME, La Rocca S, Leggeri A, Notargiacomo A, Maiolo L, De Filippis P, Cerroni L. In Vitro Evaluation of Structural Factors Favouring Bacterial Adhesion on Orthodontic Adhesive Resins. MATERIALS 2021; 14:ma14102485. [PMID: 34064903 PMCID: PMC8150295 DOI: 10.3390/ma14102485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/23/2021] [Accepted: 05/08/2021] [Indexed: 02/07/2023]
Abstract
Bacterial adhesion to the surface of orthodontic materials is an important step in the formation and proliferation of plaque bacteria, which is responsible for enamel demineralization and periodontium pathologies. With the intent of investigating if adhesive resins used for bracket bonding are prone to bacteria colonization, the surface roughness of these materials has been analyzed, combining information with a novel methodology to observe the internal structures of orthodontic composites. Scanning electron microscopy, combined with focus ion bean micromachining and stylus profilometry analyses, were performed to evaluate the compositional factors that can influence specific pivotal properties facilitating the adhesion of bacteria to the surface, such as surface roughness and robustness of three orthodontic adhesive composite resins. To confirm these findings, contact angle measurements and bacteria incubation on resin slide have been performed, evaluating similarities and differences in the final achievement. In particular, the morphological features that determine an increase in the resins surface wettability and influence the bacterial adhesion are the subject of speculation. Finally, the focused ion beam technique has been proposed as a valuable tool to combine information coming from surface roughness with specific the internal structures of the polymers.
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Affiliation(s)
- Roberta Condò
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
- Correspondence:
| | - Gianluca Mampieri
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
| | - Guido Pasquantonio
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
| | - Aldo Giancotti
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
| | - Paola Pirelli
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
| | - Maria Elena Cataldi
- PhD in Materials for Health, Environment and Energy, University of Rome “Tor Vergata”, Via della Ricerca Scientifica, 1, 00133 Rome, Italy;
| | - Serena La Rocca
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
| | - Andrea Leggeri
- Oral Surgery Specialty School, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy;
| | - Andrea Notargiacomo
- Institute for Photonics and Nanotechnologies-National Research Council, Unit of Rome, Via Cineto Romano, 42, 00156 Rome, Italy;
| | - Luca Maiolo
- Institute for Microelectronics and Microsystems-National Research Council, Unit of Rome, Via del Fosso del Cavaliere, 100, 00133 Rome, Italy;
| | - Patrizia De Filippis
- Department of Biomedicine and Prevention, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy;
| | - Loredana Cerroni
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier, 1, 00133 Rome, Italy; (G.M.); (G.P.); (A.G.); (P.P.); (S.L.R.); (L.C.)
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