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Lee SY, Shimada Y, Sadr A, Tabata T, Sato T, Byun JE, Han SH. Degree of conversion and interfacial adaptation of touch-cure resin cement polymerized by self-curing or dual-curing with reduced light. Clin Oral Investig 2024; 28:463. [PMID: 39090476 DOI: 10.1007/s00784-024-05858-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 07/23/2024] [Indexed: 08/04/2024]
Abstract
OBJECTIVES The first aim of this study was to determine whether there is a difference in degree of conversion (DC) of touch-cure cements polymerized by self-curing with adhesive or dual-curing under reduced light. The second aim was to compare interfacial adaptation of zirconia restoration cemented using touch-cure cements self-cured or dual-cured by reduced light. METHODS The DC of touch-cure resin cements with adhesive was measured continuously using Fourier transform infrared spectrometry. Experimental groups differed depending on touch-cure cement. Each group had three subgroups of polymerization method. For subgroup 1, the DC was measured by self-curing. For subgroups 2 and 3, the DCs were measured by dual-curing with reduced light penetrating 3 mm and 1 mm zirconia blocks, respectively. For interfacial adaptation evaluation, Class I cavity was prepared on an extracted third molar, and zirconia restoration was fabricated. The restoration was cemented using the same cement. Groups and subgroups for interfacial adaptation were the same as those of the DC measurement. After thermo-cycling, interfacial adaptation at the tooth-restoration interface was evaluated using swept-source optical coherence tomography imaging. RESULTS The DC of touch-cure cement differed depending on the measurement time, resin cement, and polymerization method (p < 0.05). Interfacial adaptation was different depending on the resin cement and polymerization method (p < 0.05). CONCLUSION For touch-cure cement, light-curing with higher irradiance presented a higher DC and superior interfacial adaptation than light-curing with lower irradiance or self-curing. CLINICAL RELEVANCE Although some adhesives accelerate the self-curing of touch-cure cement, light-curing for touch-cure cement is necessary for zirconia cementation.
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Affiliation(s)
- Su Young Lee
- Department of Prosthodontics, Seoul St. Mary's Dental Hospital, College of Medicine, The Catholic University of Korea, Banpo-daero 222, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Alireza Sadr
- Department of Restorative Dentistry, School of Dentistry, University of Washington, 1959 NE Pacific St, B162, Seattle, WA, 98195, USA
| | - Tomoko Tabata
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Takaaki Sato
- Department of Oral Biomedical Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Ji-Eun Byun
- Department of Conservative Dentistry, College of Dentistry, Yonsei University, #50 Yonsei-ro, Seodaemun-gu, Seoul, Korea
| | - Seung-Hoon Han
- Department of Conservative Dentistry, St. Vincent Hospital, College of Medicine, The Catholic University of Korea, 93 Jungbu-daero, Paldal-gu, Suwon, Gyeonggi-do, 16247, South Korea.
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Abdel-Gawad S, Dursun E, Ceinos R, Le Goff S, Fasham T, Attal JP, Francois P. Touch-cure activation by marketed universal resin luting cements of their associated primer to dentin. J Oral Sci 2024; 66:139-144. [PMID: 38710613 DOI: 10.2334/josnusd.24-0019] [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] [Indexed: 05/08/2024]
Abstract
PURPOSE The aim of this study was to investigate the dentin shear bond strength (SBS) and bonding interface of three recently developed "universal" resin luting cements based on different modalities. METHODS The dentin SBS and interfacial analysis of three recently launched "universal" resin luting cements, namely, G-Cem One, RelyX Universal and Panavia SA cement universal, were studied. All bonding protocols, including the previous use of their dedicated primer or universal adhesive in touch-cure mode or light-cure mode were performed. Variolink Esthetic LC used in conjunction with Scotchbond Universal Plus was used as a control group. For each group (n = 9), 10 specimens were tested for dentin SBS and two were examined by scanning electron microscopy. SBS were analyzed by two-way ANOVA followed by Dunnett's test. RESULTS SBS values showed that the three "universal" resin luting cements tested exhibit different adhesive behaviors. G-Cem One with its touch-cure activated primer had a greater SBS to dentin (25.5 MPa) than that of the control group (22.1 MPa). CONCLUSION "Universal" resin luting cements have variable efficacy when used in self-curing mode. The touch-curing mode is also of concern but may show high potential for some formulations.
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Affiliation(s)
- Sarah Abdel-Gawad
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
| | - Elisabeth Dursun
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
- Department of Pediatric Dentistry, Henri Mondor Hospital
| | - Romain Ceinos
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
- Department of Restorative Dentistry, Côte d'Azur University
| | - Stéphane Le Goff
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
| | - Timothy Fasham
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
- Department of Restorative Dentistry, Bretonneau Hospital
| | - Jean-Pierre Attal
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
- Department of Restorative Dentistry, Charles Foix Hospital
| | - Philippe Francois
- Innovative Dental Materials and Interfaces Research Unit (URB2i), Paris Cité University
- Department of Restorative Dentistry, Bretonneau Hospital
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Bahadır HS, Tuğutlu EC. Micro-shear Bond Strength of an Alternative Self-etch Application of "No Wait" Universal Adhesive to Caries-affected and Sound Dentin in Permanent and Primary Teeth. Oper Dent 2024; 49:273-281. [PMID: 38632855 DOI: 10.2341/23-065-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/23/2023] [Indexed: 04/19/2024]
Abstract
OBJECTIVE This study aimed to compare the micro-shear bond strength (μSBS) of caries-affected dentin (CAD) and sound dentin (SoD) in primary and permanent teeth using an alternative self-etch application of "no wait" universal adhesive. METHODS AND MATERIALS Flat midcoronal dentin surfaces from 72 permanent third molars and 72 second primary molars were distributed randomly into 12 groups according to the substrate SoD and artificially-created CAD (pH cycling for 14 days) and the adhesive system (GLUMA Bond5, a two-step etch & rinse adhesive, GLUMA Bond, a one-step self-etch adhesive, and Tokuyama Universal Bond, a one-step self-etch adhesive) (n=12). Bonded dentin resin discs were put through micro-shear bond strength testing after 10,000 thermocycles. The results were evaluated using two-way ANOVA and the Bonferroni test with a significance level of α = 0.05. RESULTS When compared to SoD, the etch & rinse system's test results on artificially created CAD showed a statistically significant poorer bonding performance in both permanent and primary teeth in all groups (p<0.05). While the bond strengths of permanent teeth using total-etch adhesive on sound dentin were statistically significantly higher than those using Tokuyama Universal Bond adhesive (p<0.05), there was no significant difference in sound dentin in primary teeth (p>0.05). CONCLUSIONS The etch & rinse system performed the poorest of all adhesive systems on CAD. The Tokuyama Universal Bond's adhesive strength was similar in SoD and CAD on primary teeth. The use of Tokuyama Universal Adhesives can speed up restorative treatment in pediatric dentistry.
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Affiliation(s)
- H S Bahadır
- Hasibe Sevilay Bahadır, assistant professor, Department of Restorative Dentistry, Faculty of Dentistry, Yıldırım Beyazıt University, Ankara, Turkey
| | - E C Tuğutlu
- *Esra Ceren Tuğutlu, assistant professor, Department of Pedodontics, Faculty of Dentistry, Yıldırım Beyazıt University, Ankara, Turkey
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Kibe K, Hatayama T, Shimada Y. In vitro performance of an autocured universal adhesive system in bonding to dentin. BMC Oral Health 2023; 23:933. [PMID: 38012568 PMCID: PMC10683120 DOI: 10.1186/s12903-023-03645-0] [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: 08/28/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND The successful integration of resin-based dental adhesives significantly impacts restorative dentistry, providing efficient and aesthetically pleasing caries treatments. Among various adhesives, one-step self-etching adhesives (1-SEAs) have gained popularity due to their simplicity and short application time. However, concerns have been raised regarding their bonding performance and marginal adaptation characteristics, which differ from two-step self-etching adhesives (2-SEAs) and three-step etch-and-rinse adhesives. Additionally, light-cured bonding materials may encounter challenges in deep cavities and inaccessible areas, necessitating extended light irradiation time. Autocured bonding materials are a potential solution, but limited comparative studies have been conducted on their performance. METHODS In this in vitro study, we evaluated a new autocured universal bonding material (Bondmer Lightless 2) and compared the results with recent light-cured bonding materials. Microshear bond strength (μSBS) tests were performed on 25 human molars using five different combinations of adhesives and composite resins: Bondmer Lightless 2 with Estelite Bulk Fill Flow (BE group), Bondmer Lightless 2 with a prototype composite resin (BO group), Prime&Bond Universal with SDR flow + (PS group), Scotchbond Universal with Filtek Bulk Fill (SF group), and G-Premio Bond with Gracefil BulkFlo (GG group). The bond strengths and failure modes were assessed using a universal testing machine and scanning electron microscope (SEM), respectively. Marginal adaptation was evaluated using swept-source optical coherence tomography (SS-OCT) and confocal laser scanning microscopy (CLSM) on 40 sound bovine maxillary incisors. RESULTS The μSBS test showed no significant differences in bond strength among the tested groups. Most failure modes were observed at the bond interface between the adhesive and the dentin. The autocured bonding material demonstrated significantly higher marginal adaptation (SI%) than PS, SF, and GG. The CLSM images corresponded with gaps observed in the SS-OCT images, indicating improved marginal sealing in the autocured group. CONCLUSIONS The new autocured universal bonding material exhibited comparable bond strength to a conventional light-cured material while demonstrating a superior marginal adaptation level. This finding suggested that the autocured material could be a valuable alternative, especially when extended light irradiation would pose a challenge. Further clinical studies would be warranted to evaluate the performance of the autocured bonding material in actual restorative dental practice.
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Affiliation(s)
- Kota Kibe
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan
| | - Takashi Hatayama
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan.
| | - Yasushi Shimada
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan
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Hyperbaric Pressure Effect on Dental Luting Cements. JOURNAL OF BASIC AND CLINICAL HEALTH SCIENCES 2022. [DOI: 10.30621/jbachs.1187298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Background and Purpose: The aim of this study was to evaluate the flexural strength values of five luting cements that are commonly used in dental restorations after exposed to hyperbaric pressure.
Methods: Five luting cements (polycarboxylate cement, glass ionomer luting cement, manual-mixed resin cement, and two auto-mixed resin cement) were prepared. (25 x 2 x 2 mm3) (n=16 for each) The specimens were divided into two subgroups (n=8) and were exposed to hyperbaric pressure (3 ATM) 20 times for 30 minutes. The control groups stored in ambient pressure. Universal testing machine was used for flexural strength measurement with a crosshead speed of 1 mm/min.
Results: One-way ANOVA test was used for statistical analysis, the differences in flexural strength values were additionally evaluated by Weibull Analysis. Glass ionomer and polycarboxylate cement were the most effected resins from hyperbaric pressure changes. Regardless of the pressure changes, the highest flexural strength values were seen for the self-adhesive resin cements and polycarboxylate cement showed the lowest strength value.
Conclusion: Resin cements can be used for cementation of the dental restorations in divers and individuals who are subjected to hyperbaric pressure.
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Balkaya H, Demirbuğa S. Evaluation of six different one-step universal adhesive systems in terms of dentin bond strength, adhesive interface characterization, surface tension, contact angle, degree of conversion and solvent evaporation after immediate and delayed use. J ESTHET RESTOR DENT 2022; 35:479-492. [PMID: 36194081 DOI: 10.1111/jerd.12973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/08/2022] [Accepted: 09/16/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES In this study, it was aimed to investigate the effects of different waiting periods on resin-dentin bond strength (BS), degree of conversion (DC), contact angle (CA), surface tension (ST), solvent evaporation (weight loss) and the characteristics of adhesive interfaces of the current six universal adhesive resins (ARs). MATERIALS AND METHODS A total of 216 caries-free human lower third molar teeth were used. Composite resin restorations were performed by applying six universal ARs in etch-and-rinse and self-etch mode on standardized dentin surfaces after 0, 5, and 30 min waiting time. Then, a micro-shear BS test, SEM examination and characterization of the adhesive interface were performed. In addition, DC, CA, ST, solvent evaporation of all tested ARs were evaluated. RESULTS The obtained data were statistically anaIyzed. The tested ARs did not show any statistical difference between 0 and 5 min evaluations in all parameters evaluated except for weight loss (p > 0.05). While the weight loss, ST and CA of all ARs increased in 30 min (p < 0.05), the BS, DC, thickness of the adhesive layer and the hybrid layer, resin tag length and number of resin tags varied according to the ARs used. When the ARs were used in etch-and-rinse mode, all the parameters evaluated also varied according to the AR used. Higher adhesive layer thickness and lower hybrid layer thickness were found in the self-etch mode (p < 0.05). CONCLUSIONS All of the adhesives tested can be safely used up to 30 min. This could also prevent economical loss caused by waste adhesive material. CLINICAL SIGNIFICANCE It is important to know how the bond strength, degree of conversion, adhesion, contact angle and surface tension properties of the adhesive resin waiting in the dispensing cup for a long time during clinical use are affected to make ideal restorations.
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Affiliation(s)
- Hacer Balkaya
- Department of Restorative Dentistry, Erciyes University Faculty of Dentistry, Kayseri, Turkey
| | - Sezer Demirbuğa
- Department of Restorative Dentistry, Erciyes University Faculty of Dentistry, Kayseri, Turkey
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Skapska A, Komorek Z, Cierech M, Mierzwinska-Nastalska E. Comparison of Mechanical Properties of a Self-Adhesive Composite Cement and a Heated Composite Material. Polymers (Basel) 2022; 14:polym14132686. [PMID: 35808732 PMCID: PMC9269425 DOI: 10.3390/polym14132686] [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: 05/10/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 12/07/2022] Open
Abstract
(1) Background: Due to the limitations of composite cements, the authors carried out tests to compare such materials with preheated composite materials because the latter may be an alternative to cements in the adhesive cementation procedure. (2) Methods: The materials used in the adhesive cementation procedure, i.e., Enamel Plus Hri (Micerium, Avegno, Italy), a heated composite material, and RelyX U200 Automix (3M, Maplewood, MN, USA), a dual composite cement, were tested for microhardness, compressive strength, flexural strength, diametral compressive strength, and elastic modulus. Composite material was heated to the temperature of 50 degrees Celsius before polymerisation. (3) Results: Higher values of microhardness (by 67.36%), compressive strength (by 41.84%), elastic modulus (by 17.75%), flexural strength (by 36.03%), and diametral compressive strength (by 45.52%) were obtained using the Enamel Plus Hri composite material compared to the RelyX U200 self-adhesive cement. The survey results revealed statistically significant differences. (4) Conclusions: Due to its better mechanical properties, the heated composite material (Enamel Plus Hri) is a beneficial alternative to composite cements in the indirect restoration placement procedure. As the strength parameters of the heated composite material increase, a higher resistance to the compressive and bending forces present in the oral cavity, and hence a greater durability of the created prosthetic reconstructions can be expected.
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Affiliation(s)
- Anastazja Skapska
- Department of Prosthodontics, Medical University of Warsaw, 02-091 Warsaw, Poland; (M.C.); (E.M.-N.)
- Correspondence:
| | - Zenon Komorek
- Department of Advanced Technologies, Military University of Technology, 00-908 Warsaw, Poland;
| | - Mariusz Cierech
- Department of Prosthodontics, Medical University of Warsaw, 02-091 Warsaw, Poland; (M.C.); (E.M.-N.)
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Delgado AHS, Owji N, Ashley P, Young AM. Varying 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) level improves polymerisation kinetics and flexural strength in self-adhesive, remineralising composites. Dent Mater 2021; 37:1366-1376. [PMID: 34144796 DOI: 10.1016/j.dental.2021.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/28/2021] [Accepted: 06/02/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To assess the influence of systematically varying concentrations of 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) versus 3% 4-META on the polymerisation kinetics and shrinkage, biaxial flexural strength (BFS) and modulus of remineralising composites. METHODS Composites were prepared by adding poly(propylene glycol) dimethacrylate (24 wt%), camphorquinone (1 wt%) and MDP (0%, 5%, 10%, 15% and 20 wt%) or 4-META (3%) to urethane dimethacrylate. These were mixed with glass fillers containing 8 wt% monocalcium phosphate and 4 wt% polylysine (powder-liquid ratio of 3:1). Continuous spectral changes, following 20 s light exposure (37 °C), were assessed with an ATR-FTIR to monitor polymerisation kinetics (n = 3). Final extrapolated conversions (DC,max) were employed to calculate polymerisation shrinkage. BFS and modulus of 24-h dry stored disc specimens (10 × 1 mm; n = 10) were determined using a ball-on-ring jig setup. RESULTS Maximum rate of polymerisation and DC,max increased linearly from 2.5 to 3.5% s-1 and 67 to 83%, respectively, upon increasing MDP from 0 to 20 wt%. Values with 3% 4-META were 2.6% s-1 and 78%. Shrinkage was 3.8 ± 0.3% for all formulations. Raising 4-META or MDP from 0 to 3 versus 5%, respectively, increased strength from 106 to 145 versus 136 MPa. A decreasing trend with higher MDP concentrations was noted. Elastic modulus showed no specific trend upon MDP increase. SIGNIFICANCE Whilst final conversion levels were enhanced by 3% 4-META or >5% MDP, trends did not correlate with strength. Peak strengths with 3% 4-META or 5% MDP may therefore be due to acidic monomers providing linkage between the hydrophilic, non-silane treated particles and the polymer matrix.
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Affiliation(s)
- António H S Delgado
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London, UK; Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Monte de Caparica, Almada, Portugal.
| | - Nazanin Owji
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London, UK
| | - Paul Ashley
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London, UK; Unit of Paediatric Dentistry, Department of Craniofacial Growth and Development, UCL Eastman Dental Institute, London, UK
| | - Anne M Young
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London, UK
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De Paula DM, Loguercio AD, Reis A, Sauro S, Alves AH, Picanço PR, Yoshihara K, Feitosa VP. Lack of Neutralization of 10-MDP Primers by Zirconia May Affect the Degree of Conversion of Dual-cure Resin Cement. Oper Dent 2021; 46:107-115. [PMID: 33882140 DOI: 10.2341/18-189-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2020] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE Use of zirconia primers with a low pH and a high acidic monomer concentration should be employed in combination with dual-cure resin cements that are less sensitive to an acidic environment. Primers with lower 10-MDP concentrations attain better outcomes. SUMMARY
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Yoshihara K, Nagaoka N, Benino Y, Nakamura A, Hara T, Maruo Y, Yoshida Y, Van Meerbeek B. Touch-Cure Polymerization at the Composite Cement-Dentin Interface. J Dent Res 2021; 100:935-942. [PMID: 33771050 DOI: 10.1177/00220345211001020] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Ceramic restorations are often adhesively luted onto the tooth prep. The so-called touch-cure concept was developed to yield optimum polymerization of composite cement at the restoration-cement-tooth interface for immediate bond stabilization. Although this touch cure is theorized to initiate polymerization at the interface when the accelerator in the primer makes contact with the cement, this process has not yet been proven. This study aimed to elucidate the mechanism of touch cure by measuring the degree of conversion (DC) of composite cement applied with or without an accelerator-containing tooth primer (TP) versus an accelerator-free primer using real-time Fourier-transform infrared spectroscopy (RT-FTIR) and attenuated total reflection (ATR)-FTIR. Interfacial bond strength was measured in shear mode, the accelerator composition confirmed by X-ray fluorescence analysis (XRF), and the interfacial interaction of TP and composite cement with dentin investigated by X-ray diffraction (XRD), focused-ion-beam scanning electron microscopy (FIB-SEM) with 3-dimensional interface reconstruction, and transmission electron microscopy (TEM). RT/ATR-FTIR revealed the significantly highest DC when the composite cement was applied with the accelerator-containing primer. XRF disclosed a vanadium compound as a novel chemical accelerator within TP, instead of a classic chemical curing initiator system, to set off touch cure as soon the cement contacts the previously applied primer. Although the TP contains the acidic functional monomer 10-MDP for adhesion to tooth tissue, touch cure using the accelerator-containing TP combined the fastest/highest DC with the highest bond strength. FIB-SEM and TEM confirmed the tight interfacial interaction at dentin with submicron hybridization along with stable 10-MDP also Ca-salt nanolayering.
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Affiliation(s)
- K Yoshihara
- National Institute of Advanced Industrial Science and Technology (AIST), Health and Medical Research Institute, Takamatsu, Kagawa, Japan.,Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Pathology & Experimental Medicine, Okayama, Japan
| | - N Nagaoka
- Okayama University Dental School, Advanced Research of Center for Oral and Craniofacial Science, Okayama, Japan
| | - Y Benino
- Okayama University, Graduate School of Environmental and Life Science, Okayama, Japan
| | - A Nakamura
- National Institute for Materials Science (NIMS), Electron Microscopy Analysis Station, Tsukuba, Ibaraki, Japan
| | - T Hara
- National Institute for Materials Science (NIMS), Electron Microscopy Analysis Station, Tsukuba, Ibaraki, Japan
| | - Y Maruo
- Department of Occlusion and Removable Prosthodontics, Okayama University Hospital, Okayama, Japan
| | - Y Yoshida
- Hokkaido University, Faculty of Dental Medicine, Department of Biomaterials and Bioengineering, Sapporo, Hokkaido, Japan
| | - B Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium
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Kelić K, Par M, Peroš K, Šutej I, Tarle Z. Fluoride-Releasing Restorative Materials: The Effect of a Resinous Coat on Ion Release. Acta Stomatol Croat 2021; 54:371-381. [PMID: 33642601 PMCID: PMC7871432 DOI: 10.15644/asc54/4/4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Objective To determine the effect of two adhesive systems and a glass ionomer coating resin on fluoride release and concurrent pH changes over a period of 168 days. Material and methods Four restorative materials were investigated: a giomer Beautiful II, an “alkasite” material Cention, a conventional composite Filtek Z250, and a glass ionomer cement Fuji IX Extra. Light-cured composite specimens were coated using G-aenial Bond and Clearfil Universal Bond Quick. Glass ionomer specimens were coated using GC Fuji Coat LC. Uncoated specimens were used as references. Quantitative fluoride release and pH changes were measured after1 h, 24 h, 2 days, 7 days, 28 days, 84 days, and 168 days. Results The cumulative fluoride release after 168 days increased for uncoated specimens in the following order: Filtek Z250 < Beautifil II < Cention < Fuji IX Extra. A comparatively lower fluoride release was measured for the composites coated with Clearfil Universal Bond Quick, with cumulative values after 168 days increasing in the following order: Filtek Z250 < Beautifil II < Cention. The composites coated with G-aenial Bond showed lower fluoride release compared to the uncoated specimens, with cumulative values increasing in the following order: Filtek Z250 < Beautifil II < Cention. The composites coated with G-aenial Bond showed pH values in the acidic range (4.4-5.7) after 1 h and 24 h. Conclusion Fluoride release varied among the investigated restorative materials and depended on the use of dental adhesives and coatings. The pH of all materials, coating types and time points varied.
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Affiliation(s)
- Katarina Kelić
- Stomatološka poliklinika Zagreb, Perkovčeva ulica 3, Zagreb, Croatia
| | - Matej Par
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Gundulićeva 5, Zagreb, Croatia
| | - Kristina Peroš
- Department of Pharmacology, School of Dental Medicine, University of Zagreb, Šalata 11, Zagreb, Croatia
| | - Ivana Šutej
- Department of Pharmacology, School of Dental Medicine, University of Zagreb, Šalata 11, Zagreb, Croatia
| | - Zrinka Tarle
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Gundulićeva 5, Zagreb, Croatia
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Münchow EA, da Silva AF, Piva E, Cuevas-Suárez CE, de Albuquerque MTP, Pinal R, Gregory RL, Breschi L, Bottino MC. Development of an antibacterial and anti-metalloproteinase dental adhesive for long-lasting resin composite restorations. J Mater Chem B 2020; 8:10797-10811. [PMID: 33169763 PMCID: PMC7744429 DOI: 10.1039/d0tb02058c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Despite all the advances in adhesive dentistry, dental bonds are still fragile due to degradation events that start during application of adhesive agents and the inherent hydrolysis of resin-dentin bonds. Here, we combined two outstanding processing methods (electrospinning and cryomilling) to obtain bioactive (antimicrobial and anti-metalloproteinase) fiber-based fillers containing a potent matrix metalloproteinase (MMP) inhibitor (doxycycline, DOX). Poly(ε)caprolactone solutions containing different DOX amounts (0, 5, 25, and 50 wt%) were processed via electrospinning, resulting in non-toxic submicron fibers with antimicrobial activity against Streptococcus mutans and Lactobacillus. The fibers were embedded in a resin blend, light-cured, and cryomilled for the preparation of fiber-containing fillers, which were investigated with antibacterial and in situ gelatin zymography analyzes. The fillers containing 0, 25, and 50 wt% DOX-releasing fibers were added to aliquots of a two-step, etch-and-rinse dental adhesive system. Mechanical strength, hardness, degree of conversion (DC), water sorption and solubility, bond strength to dentin, and nanoleakage analyses were performed to characterize the physico-mechanical, biological, and bonding properties of the modified adhesives. Statistical analyses (ANOVA; Kruskal-Wallis) were used when appropriate to analyze the data (α = 0.05). DOX-releasing fibers were successfully obtained, showing proper morphological architecture, cytocompatibility, drug release ability, slow degradation profile, and antibacterial activity. Reduced metalloproteinases (MMP-2 and MMP-9) activity was observed only for the DOX-containing fillers, which have also demonstrated antibacterial properties against tested bacteria. Adhesive resins modified with DOX-containing fillers demonstrated greater DC and similar mechanical properties as compared to the fiber-free adhesive (unfilled control). Concerning bonding performance to dentin, the experimental adhesives showed similar immediate bond strengths to the control. After 12 months of water storage, the fiber-modified adhesives (except the group consisting of 50 wt% DOX-loaded fillers) demonstrated stable bonds to dentin. Nanoleakage was similar among all groups investigated. DOX-releasing fibers showed promising application in developing novel dentin adhesives with potential therapeutic properties and MMP inhibition ability; antibacterial activity against relevant oral pathogens, without jeopardizing the physico-mechanical characteristics; and bonding performance of the adhesive.
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Affiliation(s)
- Eliseu A. Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS 90035-003, Brazil
| | - Adriana F. da Silva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS 96015-560, Brazil
| | - Evandro Piva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS 96015-560, Brazil
| | - Carlos E. Cuevas-Suárez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Circuito Ex Hacienda La Concepción S/N, San Agustín Tlaxiaca, Hgo, 42160 Mexico
| | - Maria T. P. de Albuquerque
- Department of Clinical Dentistry, Endodontics, Federal University of Bahia, Salvador, BA 40110-040, Brazil
| | - Rodolfo Pinal
- Department of Industrial and Physical Pharmacy, Purdue University, College of Pharmacy, West Lafayette, IN 47907, USA
| | - Richard L. Gregory
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, Indiana University School of Dentistry (IUSD), Indianapolis, IN 46202, USA
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Alma Mater Studiorum, Bologna, Italy
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
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Madrigal EL, Tichy A, Hosaka K, Ikeda M, Nakajima M, Tagami J. The effect of curing mode of dual-cure resin cements on bonding performance of universal adhesives to enamel, dentin and various restorative materials. Dent Mater J 2020; 40:446-454. [PMID: 33162459 DOI: 10.4012/dmj.2020-077] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of curing mode of dual-cure resin cements on the tensile bond strength (TBS) of universal adhesives to enamel, dentin, zirconia, lithium disilicate ceramics (LDS), feldspathic porcelain (FP), and a Pd-Au alloy was evaluated. The substrates were bonded using Tokuyama Universal Bond (TUB) or Scotchbond Universal Adhesive (SBU), followed by luting with Estecem II (ECII) or Rely-X Ultimate (RXU), respectively, which were used either in light-curing or self-curing mode. The TBS test was performed after 24 h or 5,000 thermal cycles. Light-curing significantly improved the 24-h TBS of TUB/ECII to enamel, dentin and FP, as well as the TBS of SBU/RXU to all substrates except LDS. After thermal cycling, light-curing significantly increased the TBS of both adhesives/cements to dentin, but significant differences between curing modes were seldom observed for other substrates. This suggested that light-curing is essential for the hydrophilic dentin, but self-curing might be sufficient for other substrates.
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Affiliation(s)
- Erick Luz Madrigal
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Antonin Tichy
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague
| | - Keiichi Hosaka
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Masaomi Ikeda
- Oral Prosthetic Engineering, Graduate School of Medical and Dental Sciences and Technology, Tokyo Medical and Dental University
| | - Masatoshi Nakajima
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Junji Tagami
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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15
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Kim K, Sinha J, Gao G, Childress KK, Sartor SM, Salazar AM, Huang S, Musgrave CB, Stansbury JW. High-Efficiency Radical Photopolymerization Enhanced by Autonomous Dark Cure. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Kangmin Kim
- Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Jasmine Sinha
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Guangzhe Gao
- Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Kimberly K. Childress
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Steven M. Sartor
- Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Austyn M. Salazar
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Sijia Huang
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Charles B. Musgrave
- Chemistry, University of Colorado, Boulder, Colorado 80309, United States
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
- Materials Science and Engineering, University of Colorado, Boulder, Colorado 80309, United States
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Jeffrey W. Stansbury
- Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
- Craniofacial Biology, School of Dental Medicine, Aurora, Colorado 80045, United States
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16
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Kalagi S, Feitosa SA, Münchow EA, Martins VM, Karczewski AE, Cook NB, Diefenderfer K, Eckert GJ, Geraldeli S, Bottino MC. Chlorhexidine-modified nanotubes and their effects on the polymerization and bonding performance of a dental adhesive. Dent Mater 2020; 36:687-697. [PMID: 32241557 PMCID: PMC7224330 DOI: 10.1016/j.dental.2020.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The purpose of this study was to synthesize chlorhexidine (CHX)-encapsulated aluminosilicate clay nanotubes (Halloysite®, HNTs) and to incorporate them into the primer/adhesive components of an etch-and-rinse adhesive system (SBMP; Scotchbond Multipurpose, 3M ESPE) and to test their effects on degree of conversion, viscosity, immediate and long-term bonding to dentin. METHODS CHX-modified HNTs were synthesized using 10% or 20% CHX solutions. The primer and the adhesive components of SBMP were incorporated with 15wt.% of the CHX-encapsulated HNTs. Degree of conversion (DC) and viscosity analyses were performed to characterize the modified primers/adhesives. For bond strength testing, acid-etched dentin was treated with one of the following: SBMP (control); 0.2%CHX solution before SBMP; CHX-modified primers+SBMP adhesive; SBMP primer+CHX-modified adhesives; and SBMP primer+CHX-free HNT-modified adhesive. The microtensile bond strength test was performed after immediate (24h) and long-term (6 months) of water storage. Data were analyzed using ANOVA and Tukey (α=5%) and the Weibull analysis. RESULTS DC was greater for the CHX-free HNT-modified adhesive, whereas the other experimental adhesives showed similar DC as compared with the control. Primers were less viscous than the adhesives, without significant differences within the respective materials. At 24h, all groups showed similar bonding performance and structural reliability; whereas at the 6-month period, groups treated with the 0.2%CHX solution prior bonding or with the CHX-modified primers resulted in greater bond strength than the control and superior reliability. SIGNIFICANCE The modification of a primer or adhesive with CHX-encapsulated HNTs was an advantageous approach that did not impair the polymerization, viscosity and bonding performance of the materials, showing a promising long-term effect on resin-dentin bonds.
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Affiliation(s)
- Sara Kalagi
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA; Department of Restorative Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Sabrina A Feitosa
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - Eliseu A Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS 90035-003, Brazil
| | - Victor M Martins
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - Ashley E Karczewski
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - N Blaine Cook
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA
| | - Kim Diefenderfer
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA
| | - George J Eckert
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Saulo Geraldeli
- Department of General Dentistry, School of Dental Medicine, East Carolina University, Greenville, NC, USA
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI, 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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18
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Lima CDR, da Silva DB, Vitti RP, Miranda ME, Brandt WC. Mechanical properties of experimental resin cements containing different photoinitiators and co-initiators. Clin Cosmet Investig Dent 2019; 11:285-290. [PMID: 31695508 PMCID: PMC6718251 DOI: 10.2147/ccide.s221742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/07/2019] [Indexed: 11/23/2022] Open
Abstract
Aim The aim of this study was to evaluate the influence of different concentrations of two photoinitiators and one co-initiator on the flexural strength (FS) and elastic modulus (E) of experimental resin cements. Materials and methods A mixture containing BisGMA, TEGDMA, and barium-aluminum-silicate (BaAlSi) and silanized colloidal silica (SiO2) filler particles was prepared with two photoinitiators, viz. camphorquinone (CQ) and bisacylphosphine oxide (BAPO). Dimethylaminoethyl methacrylate (DMAEMA) was used as co-initiator. Thirty groups (n=10) were formulated with different photoinitiator systems (CQ/DMAEMA and BAPO/DMAEMA) and concentrations (wt%) of photoinitiator and co-initiator. The photoactivation was carried out for 20 s with a light-emitting diode (LED, Bluephase, Ivoclar Vivadent) with irradiance of 1200 mW/cm2. The FS and E were obtained in a three-point bending test on a universal testing machine (0.5 mm/min). Data were subjected to the Kolmogorov-Smirnov normality test, followed by two-way ANOVA and Tukey’s test (α=0.05). Results No polymerization occurred in the CQ groups without DMAEMA (0 wt%). DMAEMA 0.5 %wt and 1 %wt groups showed statistically similar FS and E results for CQ and BAPO, except for CQ 0.3 wt% (FS), CQ 0.9wt% (E) and BAPO 1.76 wt% (FS and E) for DMAEMA 0.5 %wt. No significant difference was found for FS and E values for different concentrations of photoinitiators, except for CQ 0.25 wt% (FS and E) and BAPO 0.25 wt% (E) that showed the lowest values. Conclusion The wt% of the photoinitiators and co-initiator influenced the mechanical properties and the performance of CQ was dependent on the DMAEMA concentration. BAPO can be used as substitute for the conventional CQ/DMAEMA photoinitiator system.
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Affiliation(s)
- Carla Dos Reis Lima
- Department of Prosthodontics, São Leopoldo Mandic, Campinas 13045-541, SP, Brazil
| | | | - Rafael Pino Vitti
- Department of Dentistry, Herminio Ometto University Center, Araras 13607-339, SP, Brazil
| | - Milton Edson Miranda
- Department of Prosthodontics, São Leopoldo Mandic, Campinas 13045-541, SP, Brazil
| | - William Cunha Brandt
- Department of Implantology, University of Santo Amaro, São Paulo 04743-030, SP, Brazil
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19
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Cadenaro M, Maravic T, Comba A, Mazzoni A, Fanfoni L, Hilton T, Ferracane J, Breschi L. The role of polymerization in adhesive dentistry. Dent Mater 2019; 35:e1-e22. [DOI: 10.1016/j.dental.2018.11.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 10/27/2022]
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20
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Azad E, Atai M, Zandi M, Shokrollahi P, Solhi L. Structure–properties relationships in dental adhesives: Effect of initiator, matrix monomer structure, and nano-filler incorporation. Dent Mater 2018; 34:1263-1270. [DOI: 10.1016/j.dental.2018.05.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 04/24/2018] [Accepted: 05/09/2018] [Indexed: 11/16/2022]
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21
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Kadowaki Y, Kakuda S, Kawano S, Katsumata A, Ting S, Hoshika S, Ikeda T, Tanaka T, Carvalho RM, Sano H. Bond performance of "Touch and Cure" adhesives on resin core systems. Dent Mater J 2017; 35:386-91. [PMID: 27251993 DOI: 10.4012/dmj.2015-330] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to compare the micro-tensile bond strength (µTBS) of three resin core composites to dentin and to examine the bonded interface of the composites. One experimental TDK-03(TD) and, two commercial, DC core Automix One (DC) and Unifil core EM(UN) were used. Flat dentin surfaces of human molars were exposed using #600 SiC paper and bonded with the respective adhesive of each system. After bonding, the composites were built up on the surfaces and cured under two conditions: "light condition" or "dark condition". µTBSs (MPa) in the light condition were: TD; 60.02±17.08, DC; 38.21±13.70, and UN; 29.50±9.71; in the dark condition: TD; 54.62±17.11, DC; 8.40±4.81, and UN; 9.47±6.56. Dark curing negatively affected the bond strength of the two commercial resin-core materials. The experimental material was not affected by the curing conditions.
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Affiliation(s)
- Yoshitaka Kadowaki
- Department of Restorative Dentistry, Division of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University
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22
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Hirai K, Tsujimoto A, Nojiri K, Ueta H, Takamizawa T, Barkmeier WW, Latta MA, Miyazaki M. Influence of photoirradiation conditions on dentin bond durability and interfacial characteristics of universal adhesives. Dent Mater J 2017; 36:747-754. [PMID: 28652552 DOI: 10.4012/dmj.2016-019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The influence of photoirradiation conditions on dentin bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the dentin surfaces and photoirradiated with 100 mW/cm2 for 40 s, 200 mW/cm2 for 20 s, and 400 mW/cm2 for 10 s. A resin composite was bonded to dentin to determine shear bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method. Greater dentin bond strengths after 24 h water storage and 30,000 thermal cycles were achieved under these conditions at light intensity exceeding 200 mW/cm2. Universal adhesives photoirradiated above 200 mW/cm2 exhibited significantly higher water contact angles than those at 100 mW/cm2. The results of this study suggested that the photoirradiation conditions affect the dentin bond durability and interfacial characteristics of universal adhesives even at the same total energy.
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Affiliation(s)
- Kazutaka Hirai
- Department of Operative Dentistry, Nihon University School of Dentistry
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, Nihon University School of Dentistry.,Department of General Dentistry, Creighton University School of Dentistry
| | - Kie Nojiri
- Department of Operative Dentistry, Nihon University School of Dentistry
| | - Hirofumi Ueta
- Department of Operative Dentistry, Nihon University School of Dentistry
| | | | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry
| | - Masashi Miyazaki
- Department of Operative Dentistry, Nihon University School of Dentistry
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Augusto CR, Leitune VCB, Ogliari FA, Collares FM. Influence of an iodonium salt on the properties of dual-polymerizing self-adhesive resin cements. J Prosthet Dent 2017; 118:228-234. [PMID: 28159346 DOI: 10.1016/j.prosdent.2016.10.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 10/19/2016] [Accepted: 10/19/2016] [Indexed: 11/17/2022]
Abstract
STATEMENT OF PROBLEM Dual-polymerizing self-adhesive resin cements present mechanical properties that may adversely affect the clinical performance of luted fiber-reinforced posts. PURPOSE The purpose of this in vitro study was to evaluate the properties of dual-polymerizing self-adhesive resin cements after the addition of an onium salt. MATERIAL AND METHODS The experimental groups were set according to the molar concentration of diphenyliodonium hexafluorphosphate (DPIHFP) (0.5, 1, and 2 mol%). The resin cements were submitted to a push-out bond strength test and assessed for flexural strength (ISO 4049/2009), degree of conversion (Fourier-transformed infrared spectroscopy), depth of polymerization, swelling coefficient, and degradation in solvent. The data were statistically analyzed by ANOVA, Tukey test, Kruskal-Wallis test, Dunn multiple comparison, and paired Student t test (α=.05). RESULTS All the RelyX U100 groups with onium salt showed the highest degree of conversion after 24 hours and 7 days (P<.001). However, no statistical difference was found among the BisCem groups (P=.054). The addition of 0.5 mol% DPIHFP increased the push-out bond strength and microhardness of RelyX U100 and promoted less degradation after immersion in solvent. The BisCem control group did not present a statistical difference from the experimental groups in terms of bond strength; the control group and the 0.5 mol% group showed no degradation in solvent. For swelling coefficient and flexural strength, no difference was found between the BisCem groups (P=.067 and P=.173), and the RelyX U100 2 mol% group presented the lower value (P<.001 and P=.048). Depth of polymerization was not statistically different in the experimental groups for either resin cement (P=.999). CONCLUSIONS The addition of 0.5 mol% DPIHFP improved the physical properties of dual-polymerizing self-adhesive resin cements.
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Affiliation(s)
- Carolina Rocha Augusto
- Graduate student, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Vicente Castelo Branco Leitune
- Professor, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fabrício Aulo Ogliari
- Professor, Materials Engineering School, Federal University of Pelotas, Pelotas, Brazil
| | - Fabrício Mezzomo Collares
- Professor, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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ARAI M, TAKAGAKI T, TAKAHASHI A, TAGAMI J. The role of functional phosphoric acid ester monomers in the surface treatment of yttria-stabilized tetragonal zirconia polycrystals. Dent Mater J 2017; 36:190-194. [DOI: 10.4012/dmj.2016-060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Masami ARAI
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Tomohiro TAKAGAKI
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Akifumi TAKAHASHI
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Junji TAGAMI
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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25
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Cassina G, Fischer J, Rohr N. Correlation between flexural and indirect tensile strength of resin composite cements. Head Face Med 2016; 12:29. [PMID: 27809863 PMCID: PMC5096060 DOI: 10.1186/s13005-016-0128-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 10/26/2016] [Indexed: 11/10/2022] Open
Abstract
Background To evaluate a potential correlation between flexural strength and indirect tensile strength in assessing the mechanical strength of resin composite cements. Methods Flexural strength (n = 5) and indirect tensile strength (n = 5) of 7 resin composite cements (RelyX Unicem 2 Automix [RXU], Panavia SA [PSA], Clearfil SA [CSA], Panavia F2.0 [PF2], Multilink Implant [MLI], DuoCem [DCM], Panavia 21 [P21]) were determined. Specimens were either auto-polymerized or dual-cured (except P21) and stored in water at 37 °C for 1 day prior to measurement. Flexural and indirect tensile strength of 4 cements (RXU, PSA, PF2, MLI) was additionally measured directly after curing and after 96 h water storage at 37 °C. Results Except for PF2, dual-cured specimens achieved higher flexural strength than auto-polymerized specimens. In the indirect tensile strength test differences in auto-polymerized and dual-cured specimens were only detected for RXU and DCM. A general non-linear correlation was found between flexural and indirect tensile strength values. However, strength values of auto-polymerized and dual-cured specimens did not generally correlate. Conclusions Flexural strength and indirect tensile strength of resin composite cements are correlated. At high strength values the indirect tensile test is less sensitive than the flexural test. The results suggest that the indirect tensile test may only be recommended as a screening test especially for low or medium strength resin composite cements.
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Affiliation(s)
- Gianluca Cassina
- Division of Dental Materials and Engineering, Clinic for Reconstructive Dentistry and Temporomandibular Disorders, University Hospital of Dental Medicine, University of Basel, Hebelstrasse 3, 4056, Basel, Switzerland
| | - Jens Fischer
- Division of Dental Materials and Engineering, Clinic for Reconstructive Dentistry and Temporomandibular Disorders, University Hospital of Dental Medicine, University of Basel, Hebelstrasse 3, 4056, Basel, Switzerland
| | - Nadja Rohr
- Division of Dental Materials and Engineering, Clinic for Reconstructive Dentistry and Temporomandibular Disorders, University Hospital of Dental Medicine, University of Basel, Hebelstrasse 3, 4056, Basel, Switzerland.
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Melinte V, Buruiana T, Chibac A, Mares M, Aldea H, Buruiana EC. New acid BisGMA analogs for dental adhesive applications with antimicrobial activity. Dent Mater 2016; 32:e314-e326. [PMID: 27671467 DOI: 10.1016/j.dental.2016.09.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 07/08/2016] [Accepted: 09/03/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To achieve bisphenol A glycerolate dimethacrylate (BisGMA) analogs with reduced viscosity to be used in the formulation of dental adhesives containing biocidal components. METHODS A series of low-viscosity BisGMA derivatives (η: 39-12Pas) modified with 30, 60 and, respectively 80mol% carboxylic acid units were synthesized and characterized. Hydrogen bonding interactions in our monomers, the photopolymerization behavior and implicitly the conversion degree (DC) for some experimental adhesive formulations containing acid-modified BisGMA, commercial BisGMA (only in F1-F3), triethyleneglycol dimethacrylate and 2-hydroxyethyl methacrylate were examined by FTIR spectroscopy. The water effects on the photocrosslinked networks together with the flexural strength/modulus were also investigated. The adhesive penetration into the dentin surface was surveyed by SEM analysis, and the antimicrobial activity triggered by the incorporation of 0.5wt% AgNO3, 10wt% zinc methacrylate or 1wt% triclosan methacrylate in selected adhesive formulations on the growth of Streptococcus mutans and Candida albicans strains was evidenced. RESULTS The contribution of the hydrogen bonding interactions was found to be lower in BisGMA derivatives than in non-modified BisGMA, and the DC varied between 56.5 (F6) and 83.7% (F1) compared with a control formulation based on BisGMA:TEGDMA (DC=58.2%). The flexural strength and flexural modulus varied in the range 33.7MPa (F6)-54.4MPa (F8)MPa and 0.64 (F6)-1.43 (F8)GPa, respectively. SEM observation of adhesive-dentin interface revealed the formation of resin tags for the carboxyl-containing adhesive, while for the control adhesive they are hardly formed. Also, the microorganism development was inhibited, the proposed materials displaying antimicrobial activity. SIGNIFICANCE The experimental formulations based on carboxyl-functionalized BisGMA exhibit a similar or even improved behavior over control sample, suggesting their potential applicability as antimicrobial dental adhesives.
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Affiliation(s)
- Violeta Melinte
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Tinca Buruiana
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania.
| | - Andreea Chibac
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Mihai Mares
- Laboratory of Antimicrobial Chemotherapy, "Ion Ionescu de la Brad" University, 8 Sadoveanu Alley, 700489 Iasi, Romania
| | - Horia Aldea
- Dental Office, 17 T. Vladimirescu Street, Iasi, Romania
| | - Emil C Buruiana
- Polyaddition and Photochemistry Department, Petru Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania
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Hanabusa M, Yoshihara K, Yoshida Y, Okihara T, Yamamoto T, Momoi Y, Van Meerbeek B. Interference of functional monomers with polymerization efficiency of adhesives. Eur J Oral Sci 2016; 124:204-9. [PMID: 26864705 DOI: 10.1111/eos.12245] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2015] [Indexed: 11/30/2022]
Abstract
The degree of conversion (DC) of camphorquinone/amine-based adhesives is affected by acidic functional monomers as a result of inactivation of the amine co-initiator through an acid-base reaction. During bonding, functional monomers of self-etch adhesives chemically interact with hydroxyapatite (HAp). Here, we tested in how far the latter interaction of functional monomers with HAp counteracts the expected reduction in DC of camphorquinone/amine-based adhesives. The DC of three experimental adhesive formulations, containing either of the two functional monomers [10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) or 4-methacryloxyethyl trimellitic acid anhydride (4-META)] or no functional monomer (no-FM; control), was measured with and without HAp powder added to the adhesive formulations. Both the variables 'functional monomer' and 'HAp' were found to be significant, with the functional monomer reducing the DC and HAp counteracting this effect. It is concluded that the functional monomers 10-MDP and 4-META interfere with the polymerization efficiency of adhesives. This interference is less prominent in the presence of HAp, which would clinically correspond to when these two functional monomers of the adhesive simultaneously interact with HAp in tooth tissue.
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Affiliation(s)
- Masao Hanabusa
- Department of Operative Dentistry, Tsurumi University School of Dental Medicine, Yokohama, Japan
| | - Kumiko Yoshihara
- Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
| | - Yasuhiro Yoshida
- Department of Biomaterials and Bioengineering, Graduate School of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Takumi Okihara
- Division of Chemical and Biological Technology, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Takatsugu Yamamoto
- Department of Operative Dentistry, Tsurumi University School of Dental Medicine, Yokohama, Japan
| | - Yasuko Momoi
- Department of Operative Dentistry, Tsurumi University School of Dental Medicine, Yokohama, Japan
| | - Bart Van Meerbeek
- BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Leuven, Belgium
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Toledano M, Cabello I, Aguilera FS, Osorio E, Toledano-Osorio M, Osorio R. Improved Sealing and Remineralization at the Resin-Dentin Interface After Phosphoric Acid Etching and Load Cycling. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2015; 21:1530-1548. [PMID: 26471836 DOI: 10.1017/s1431927615015317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The purpose of this study was to investigate micro-morphology of the resin-dentin inter-diffusion zone using two different single-bottle self-etching dentin adhesives with and without previous acid-etching, after in vitro mechanical loading stimuli. Extracted human third molars were sectioned to obtain dentin surfaces. Two different single-bottle self-etching dentin adhesives, Futurabond U and Experimental both from VOCO, were applied following the manufacturer's instructions or after 37% phosphoric acid application. Resin-dentin interfaces were analyzed with dye assisted confocal microscopy evaluation (CLSM), including the calcium-chelation technique, xylenol orange (CLSM-XO). CLSM revealed that resin-dentin interfaces of unloaded specimens were deficiently resin-hybridized, in general. These samples showed a Rhodamine B-labeled hybrid complex and adhesive layer completely affected by fluorescein penetration (nanoleakage) through the porous resin-dentin interface, but thicker after PA-etching. Load cycling promoted an improved sealing of the resin-dentin interface at dentin, a decrease of the hybrid complex porosity, and an increment of dentin mineralization. Load cycled specimens treated with the XO technique produced a clearly outlined fluorescence due to consistent Ca-mineral deposits within the bonding interface and inside the dentinal tubules, especially when the experimental adhesive was applied.
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Affiliation(s)
- Manuel Toledano
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
| | - Inmaculada Cabello
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
| | - Fátima S Aguilera
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
| | - Estrella Osorio
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
| | - Manuel Toledano-Osorio
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
| | - Raquel Osorio
- Faculty of Dentistry,University of Granada,Dental Materials Section,Colegio Máximo de Cartuja s/n,18071 Granada,Spain
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Lee DH, Mai HN, Yang JC, Kwon TY. The effect of 4,4'-bis(N,N-diethylamino) benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing. J Adv Prosthodont 2015; 7:386-91. [PMID: 26576255 PMCID: PMC4644780 DOI: 10.4047/jap.2015.7.5.386] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/20/2015] [Accepted: 08/27/2015] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The purpose of this preliminary study was to investigate the effects of adding 4,4'-bis(N,N-diethylamino) benzophenone (DEABP) as a co-initiator to a binary photoinitiating system (camphorquinone-amine) to analyze on the degree of conversion (DC) of a light-cured resin for dental 3D printing. MATERIALS AND METHODS Cylindrical specimens (N=60, n=30 per group, ø5 mm × 1 mm) were fabricated using bisphenol A glycerolate dimethacrylate (BisGMA) both with and without DEABP. The freshly mixed resins were exposed to light in a custom-made closed chamber with nine light-emitting diode lamps (wavelength: 405 nm; power: 840 mW/cm2) for polymerization at each incidence of light-irradiation at 10, 30, 60, 180, and 300 seconds, while five specimens at a time were evaluated at each given irradiation point. Fourier-transform infrared (FTIR) spectroscopy was used to measure the DC values of the resins. Two-way analysis of variance and the Duncan post hoc test were used to analyze statistically significant differences between the groups and given times (α=.05). RESULTS In the DEABP-containing resin, the DC values were significantly higher at all points in time (P<.001), and also the initial polymerization velocity was faster than in the DEABP-free resin. CONCLUSION The addition of DEABP significantly enhanced the DC values and, thus, could potentially become an efficient photoinitiator when combined with a camphorquinone-amine system and may be utilized as a more advanced photopolymerization system for dental 3D printing.
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Affiliation(s)
- Du-Hyeong Lee
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Hang Nga Mai
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Jin-Chul Yang
- Department of Polymer Science & Engineering, School of Applied Chemical Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Tae-Yub Kwon
- Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
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Toledano M, Aguilera FS, Osorio E, Cabello I, Toledano-Osorio M, Osorio R. Functional and molecular structural analysis of dentine interfaces promoted by a Zn-doped self-etching adhesive and an in vitro load cycling model. J Mech Behav Biomed Mater 2015; 50:131-49. [DOI: 10.1016/j.jmbbm.2015.05.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/20/2015] [Accepted: 05/22/2015] [Indexed: 01/22/2023]
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Malavasi CV, Macedo EM, Souza KDC, Rego GF, Schneider LFJ, Cavalcante LM. Surface Texture and Optical Properties of Self-Adhering Composite Materials after Toothbrush Abrasion. J Contemp Dent Pract 2015; 16:775-782. [PMID: 26581456 DOI: 10.5005/jp-journals-10024-1756] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
UNLABELLED This study evaluated the surface texture and optical properties of two self-adhering composites and a nanofilled composite before and after toothbrush abrasion. Vertise Flow (Kerr), Fusio Liquid (Pentron Clinical) and Filtek Z350 XT (3M ESPE) composites were divided into 3 groups (n = 6). Disks of 12 mm diameter and 2 mm thick were made. All materials were light-cured with a LED light source for 40 seconds. Analyses of surface roughness, gloss retention and color stability were performed 24 hours after light curing and after 20,000 brushing cycles. Data were analyzed with analysis of variance (ANOVA) and Tukey's test (α = 5%). RESULTS Tukey's test ascertained that toothbrush abrasion resulted in rougher and matte surfaces for all composites tested. Filtek Z350 presented better gloss retention after abrasion. On surface roughness evaluation, there was no statistical difference between Fusio Liquid Dentin and Filtek Z350 resins (p > 0.05). Vertise Flow resin showed better color stability (ΔE), than the other two materials. CONCLUSION Nanofilled material presented better gloss retention but it did not produce the best results in aspects related to surface roughness and color stability compared to self-adhering composites. CLINICAL SIGNIFICANCE A simulation of degradation process by using toothbrush abrasion produced a rougher and matte surface in all composites tested. The surface texture was not only related to filler's amount present in materials, but also with the organic matrix composition of them. The results suggested that the constant development of new materials, seeking for a technical simplification, seems an innovative attraction for dentist's clinical routine, even though larger studies are necessary to promote to everyone a better understanding and improvement of action and effectiveness of this new class of materials.
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Affiliation(s)
- Caroline Veiga Malavasi
- Postgraduate Student, School of Dentistry, Federal Fluminense University, Niteroi RJ, Brazil, Phone: 02124945844, e-mail:
| | | | | | | | - Luis Felipe Jochims Schneider
- Nucleus for Dental Biomaterials Research, School of Dentistry, Veiga de Almeida University, Rio de Janeiro; School of Dentistry, Federal Fluminense University, Niteroi, RJ, Brazil
| | - Larissa Maria Cavalcante
- School of Dentistry, Federal Fluminense University, Niteroi; School of Dentistry, Universidade Salgado de Oliveira, Niteroi RJ, Brazil
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Yazdi FM, Moosavi H, Atai M, Zeynali M. Dentin bond strength and degree of conversion evaluation of experimental self-etch adhesive systems. J Clin Exp Dent 2015; 7:e243-9. [PMID: 26155340 PMCID: PMC4483331 DOI: 10.4317/jced.51842] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 11/04/2014] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The aim of this study was to investigate the effect of different concentrations of 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) monomer in one-step self-etch experimental adhesives on dentinal microshear bond strength (µSBS), their degree of conversion and bonded micro structure. MATERIAL AND METHODS Composite resin cylinders (Clearfil AP-X) were bonded on human sound molar dentinal surfaces by using five experimental one-step self-etching adhesives (1-SEAs) containing 0% (E0), 5% (E5), 10% (E10), 15% (E15), 20% (E20) (by weight) 10-MDP monomer and Clearfil S3 Bond (CS3) as a control. After 24 hours, microshear bond strength was tested. The degree of conversion was also measured using Fourier transform infrared spectroscopy. Interfacial ultrastructure was observed under a scanning electron microscope in all the groups. RESULTS A higher microshear bond strength was observed with adhesives containing 10% and 15% 10-MDP in comparison to study groups (P<.05). Clearfil S3 Bond and 10% MDP had a significantly greater degree of conversion than other groups (P<.05). CONCLUSIONS The amount of functional monomer in 1-SEAs influences both the bonding performance and degree of conversion; 10% 10-MDP showed the best combination of bond strength and degree of conversion. Key words:Self-etch adhesives, 10-MDP, bond strength, degree of conversion.
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Affiliation(s)
- Fatemeh-Maleknejad Yazdi
- Professor, Dental Materials Research Center, Department of Operative Dentistry, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Horieh Moosavi
- Associate Professor, Dental Materials Research Center, Department of Operative Dentistry, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Atai
- Department of Polymer Sciences, Iran Polymer and Petrochemical Institute, P.O. Box 14965/159, Tehran, Iran
| | - Mahsa Zeynali
- Assistant Professor, Dental Materials Research Center, Department of Operative Dentistry, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
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MATSUI N, TAKAGAKI T, SADR A, IKEDA M, ICHINOSE S, NIKAIDO T, TAGAMI J. The role of MDP in a bonding resin of a two-step self-etching adhesive system. Dent Mater J 2015; 34:227-33. [DOI: 10.4012/dmj.2014-205] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Naoko MATSUI
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Tomohiro TAKAGAKI
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Alireza SADR
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Masaomi IKEDA
- Clinical Oral Science, Department of Oral Health Care Sciences, Tokyo Medical and Dental University
| | - Shizuko ICHINOSE
- Instrumental Analysis Research Center, Tokyo Medical and Dental University
| | - Toru NIKAIDO
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Junji TAGAMI
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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KAWANO S, FU J, SAIKAEW P, CHOWDHURY AFMA, FUKUZAWA N, KADOWAKI Y, KAKUDA S, HOSHIKA S, NAKAOKI Y, IKEDA T, TANAKA T, SANO H. Microtensile bond strength of a newly developed resin cement to dentin. Dent Mater J 2015; 34:61-9. [DOI: 10.4012/dmj.2014-122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Shimpei KAWANO
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Jiale FU
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Pipop SAIKAEW
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - AFM Almas CHOWDHURY
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Naoyuki FUKUZAWA
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Yoshitaka KADOWAKI
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Shinichi KAKUDA
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Shuhei HOSHIKA
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Yasuko NAKAOKI
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Takatsumi IKEDA
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Toru TANAKA
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
| | - Hidehiko SANO
- Department of Restorative Dentistry, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
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Sato M, Fujishima A, Shibata Y, Miyazaki T, Inoue M. Nanoindentation tests to assess polymerization of resin-based luting cement. Dent Mater 2014; 30:1021-8. [DOI: 10.1016/j.dental.2014.05.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 04/16/2014] [Accepted: 05/29/2014] [Indexed: 12/15/2022]
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Toledano M, Aguilera FS, Sauro S, Cabello I, Osorio E, Osorio R. Load cycling enhances bioactivity at the resin–dentin interface. Dent Mater 2014; 30:e169-88. [DOI: 10.1016/j.dental.2014.02.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 10/22/2013] [Accepted: 02/12/2014] [Indexed: 11/24/2022]
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Toledano M, Osorio E, Aguilera FS, Sauro S, Cabello I, Osorio R. In vitro mechanical stimulation promoted remineralization at the resin/dentin interface. J Mech Behav Biomed Mater 2014; 30:61-74. [DOI: 10.1016/j.jmbbm.2013.10.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 10/14/2013] [Accepted: 10/19/2013] [Indexed: 10/26/2022]
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Monomer-to-polymer conversion and micro-tensile bond strength to dentine of experimental and commercial adhesives containing diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide or a camphorquinone/amine photo-initiator system. J Dent 2013; 41:918-26. [DOI: 10.1016/j.jdent.2013.07.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 07/08/2013] [Accepted: 07/19/2013] [Indexed: 11/19/2022] Open
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Eliades A, Birpou E, Eliades T, Eliades G. Self-adhesive restoratives as pit and fissure sealants: a comparative laboratory study. Dent Mater 2013; 29:752-62. [PMID: 23669197 DOI: 10.1016/j.dental.2013.04.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/18/2013] [Accepted: 04/10/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVES To evaluate the properties of self-adhesive restorative materials used as sealants in comparison with sealants with hydrophobic or hydrophilic monomers. METHODS The self-adhesive materials tested were Fusio (FS) and Vertise-Flow (VF) and the sealants Embrace Wetbond (EM/hydrophilic) and Helioseal-F (HS/hydrophobic). The properties tested were: (a) degree of cure (%DC, n: 5, ATR-FTIR), (b) extent of oxygen inhibition (n: 5, transmission optical microscopy), (c) flow (n: 5, ASTM D-4242 method), (d) hardness (VH0.2kp/10s dry/1w in water), (e) adaptation, microleakage and fissure penetration (n: 10, 1% fuschin dye, reflection optical microscopy and ESEM). Statistical analysis was performed by one-way ANOVA plus Tukey test (a-d), Fisher's exact and Kruskal-Wallis plus Tukey tests (e) at a 95% confidence level. RESULTS VF showed the highest %DC(76.1) followed by HS(68.7) and EM(61.3), FS(59.2). HS demonstrated the highest extent of oxygen inhibition (23μm vs. 13-10μm of the rest). EM and HS exhibited the greatest flow, followed by FS and VM. The VHN(0.2kp/10s) ranking before and after 1week water exposure was FS≥VF>EM≥HS. Water storage increased VF and reduced HS values. The lowest adaptation and microleakage scores were found in HS. FS and VF after alumina sandblasting showed the worst adaptation and leakage scores, that were improved after acid-etching. Improved fissure penetration was found in HS, EM and FS, VF after acid-etching. SIGNIFICANCE Although the self-adhesive materials presented improved setting characteristics, their low flow affected fissure penetration capacity. When combined with enamel acid-etching, adaptation and microleakage scoring were substantially improved in comparison with enamel sandblasting. The sealant with the hydrophobic monomers demonstrated the best sealing characteristics.
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Affiliation(s)
- Anna Eliades
- Department of Biomaterials, University of Athens, School of Dentistry, Athens, Greece
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