Carlos Enrique Cuevas-Suárez1, Tatiana S Ramos2, Stéfani Becker Rodrigues3, Fabricio Mezzomo Collares4, Cesar Henrique Zanchi5, Rafael Guerra Lund6, Adriana Fernandes da Silva7, Evandro Piva8. 1. 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; Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas. Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: cecuevas@uaeh.edu.mx. 2. Biomaterials Development and Control Center (CDC-Bio), Federal University of Pelotas, Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: tsrfarma@gmail.com. 3. Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Ramiro Barcelos 2492, Porto Alegre, RS 90035-004, Brazil. Electronic address: stefanibeckerodrigues@gmail.com. 4. Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Ramiro Barcelos 2492, Porto Alegre, RS 90035-004, Brazil. Electronic address: fabriciodonto@gmail.com. 5. Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas. Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: chzanchi@gmail.com. 6. Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas. Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: rafael.lund@gmail.com. 7. Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas. Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: adrisilvapiva@gmail.com. 8. Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas. Gonçalves Cháves 457, Pelotas, RS 96015-560, Brazil. Electronic address: evpiva@pq.cnpq.br.
Abstract
OBJECTIVES: To evaluate the micro-tensile bond strength to dentin (μTBS), the degree of conversion (DC) and nanoleakage expression (NL) of eight dental adhesives considering their expiry date (as-received, half-life and or end of shelf-life) after shelf-life simulation. METHODS: Five universal adhesives (Single Bond Universal, SBU; Tetric Bond Universal, TBU; OneCoat Universal, OCU; OptiBond Universal, OBU; and Prime&Bond Elect, P&B), two two-step self-etch adhesives (Clearfil SE, CSE; and AdheSE, ASE) and one two-step etch-and-rinse adhesive (Adper Singlebond 2, ASB) were evaluated. Shelf-life was simulated by storing the materials in an acclimatization chamber for different periods of time. The μTBS was tested in accordance with ISO/TS 11,405. DC was evaluated by means of FTIR spectroscopy. NL was evaluated after ammoniacal silver challenge. The significance level of α=0.05 was used for all statistical analyses. RESULTS: The μTBS to dentin of TBU, P&B, ASE, and ASB adhesive systems remained stable throughout the shelf-life periods evaluated, while for SBU, OCU, OBU, and CSE, decreased significantly after evaluation in the 'half-life' or 'end of shelf-life' condition (p<0.05). Except for P&B, ASE and OBU, the degree of conversion significantly decreased after the shelf-life simulation (p<0.05). OCU, ASE, and CSE showed significantly increased percentage of silver deposition within the adhesive layer (p<0.05). SIGNIFICANCE: Storing conditions and progressively longer storage time affect the performance of universal adhesives systems.
OBJECTIVES: To evaluate the micro-tensile bond strength to dentin (μTBS), the degree of conversion (DC) and nanoleakage expression (NL) of eight dental adhesives considering their expiry date (as-received, half-life and or end of shelf-life) after shelf-life simulation. METHODS: Five universal adhesives (Single Bond Universal, SBU; Tetric Bond Universal, TBU; OneCoat Universal, OCU; OptiBond Universal, OBU; and Prime&Bond Elect, P&B), two two-step self-etch adhesives (Clearfil SE, CSE; and AdheSE, ASE) and one two-step etch-and-rinse adhesive (Adper Singlebond 2, ASB) were evaluated. Shelf-life was simulated by storing the materials in an acclimatization chamber for different periods of time. The μTBS was tested in accordance with ISO/TS 11,405. DC was evaluated by means of FTIR spectroscopy. NL was evaluated after ammoniacal silver challenge. The significance level of α=0.05 was used for all statistical analyses. RESULTS: The μTBS to dentin of TBU, P&B, ASE, and ASB adhesive systems remained stable throughout the shelf-life periods evaluated, while for SBU, OCU, OBU, and CSE, decreased significantly after evaluation in the 'half-life' or 'end of shelf-life' condition (p<0.05). Except for P&B, ASE and OBU, the degree of conversion significantly decreased after the shelf-life simulation (p<0.05). OCU, ASE, and CSE showed significantly increased percentage of silver deposition within the adhesive layer (p<0.05). SIGNIFICANCE: Storing conditions and progressively longer storage time affect the performance of universal adhesives systems.
Authors: Eliseu A Münchow; Adriana F da Silva; Evandro Piva; Carlos E Cuevas-Suárez; Maria T P de Albuquerque; Rodolfo Pinal; Richard L Gregory; Lorenzo Breschi; Marco C Bottino Journal: J Mater Chem B Date: 2020-11-10 Impact factor: 6.331
Authors: Louis Hardan; Rim Bourgi; Carlos Enrique Cuevas-Suárez; Maciej Zarow; Naji Kharouf; Davide Mancino; Carlos Fernández Villares; Dariusz Skaba; Monika Lukomska-Szymanska Journal: Microorganisms Date: 2021-06-06