| Autor: |
Sauro S; Departamento de Odontologia, Facultad de Ciencias de la Salud, Universidad CEU Cardenal Herrera, 46115 Valencia, SPAIN. salvatore.sauro@uchceu.es.; Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia. salvatore.sauro@uchceu.es., Makeeva I; Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia. irina_makeeva@inbox.ru., Faus-Matoses V; Departamento de Estomatología, Facultad de Medicina y Odontología, Universitat de Valencia, 46010 Valencia, SPAIN. fausvj@uv.es., Foschi F; Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia. federico.foschi@kcl.ac.uk.; Department of Restorative Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences at King's College London, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK. federico.foschi@kcl.ac.uk., Giovarruscio M; Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia. giovarruscio@me.com.; Department of Restorative Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences at King's College London, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK. giovarruscio@me.com., Maciel Pires P; Departamento de Odontologia, Facultad de Ciencias de la Salud, Universidad CEU Cardenal Herrera, 46115 Valencia, SPAIN. paulinha_pmp@hotmail.com.; Department of Pediatric Dentistry, Federal University of Rio de Janeiro, 21941-617 Rio de Janeiro, Brazil. paulinha_pmp@hotmail.com., Martins Moura ME; Departamento de Odontologia, Facultad de Ciencias de la Salud, Universidad CEU Cardenal Herrera, 46115 Valencia, SPAIN. mariaelisa_martins@hotmail.com.; Materiais Dentários, Universidade Federal do Ceará, Fortaleza, 60430-355 Ceará, Brazil. mariaelisa_martins@hotmail.com., Almeida Neves A; Department of Pediatric Dentistry, Federal University of Rio de Janeiro, 21941-617 Rio de Janeiro, Brazil. aline.neves@odonto.ufrj.br., Faus-Llácer V; Departamento de Estomatología, Facultad de Medicina y Odontología, Universitat de Valencia, 46010 Valencia, SPAIN. Vicente.J.Faus@uv.es. |
| Abstrakt: |
This study aimed at evaluating the microtensile bond strength (MTBS) and fractographic features of dentine-bonded specimens created using universal adhesives applied in etch-and-rinse (ER) or self-etching (SE) mode in combination with modern ion-releasing resin-modified glass-ionomer cement (RMGIC)-based materials after load cycling and artificial saliva aging. Two universal adhesives (FTB: Futurabond M+, VOCO, Germany; SCU: Scotchbond Universal, 3M Oral Care, USA) were used. Composite build-ups were made with conventional nano-filled composite (AURA, SDI, Australia), conventional resin-modified glass ionomer cement (Ionolux VOCO, Germany), or a (RMGIC)-based composite (ACTIVA, Pulpdent, USA). The specimens were divided in three groups and immersed in deionized water for 24 h, load-cycled (350,000 cycles; 3 Hz; 70 N), or load-cycled and cut into matchsticks and finally immersed for 8 months in artificial saliva (AS). The specimens were cut into matchsticks and tested for microtensile bond strength. The results were analyzed statistically using three-way ANOVA and Fisher's LSD post hoc test ( p < 0.05). Fractographic analysis was performed through stereomicroscope and FE-SEM. FTB showed no significant drop in bond strength after aging. Unlike the conventional composite, the two RMGIC-based materials caused no bond strength reduction in SCU after load-cycle aging and after prolonged aging (8 months). The SEM fractographic analysis showed severe degradation, especially with composite applied on dentine bonded with SCU in ER mode; such degradation was less evident with the two GIC-based materials. The dentine-bond longevity may be influenced by the composition rather than the mode of application (ER vs. SE) of the universal adhesives. Moreover, the choice of the restorative material may play an important role on the longevity of the finalrestoration. Indeed, bioactive GIC-based materials may contribute to maintain the bonding performance of simplified universal adhesives over time, especially when these bonding systems are applied in ER mode. |
