María Vicente1, Ana L Gomes1, Javier Montero2, Eva Rosel3, Vicente Seoane1, Alberto Albaladejo2. 1. Dental Clinic (Faculty of Medicine), University of Salamanca. Paseo Universidad de Coimbra, s/n, 37007, Salamanca, Spain. 2. Contracted Professor of Dental Clinic (Faculty of Medicine), University of Salamanca. Paseo Universidad de Coimbra, s/n, 37007, Salamanca, Spain. 3. Dental Clinic (Faculty of Odontology), University of Granada. Colegio Máximo, Campus Universitario de Cartuja, 18011, Granada, Spain.
Abstract
BACKGROUND AND OBJECTIVE: The aim of this study was to evaluate the influence of cyclic loading on the shear bond strength (SBS) of a self-adhesive resin cement to zirconia surfaces after femtosecond laser irradiation at different steps and several conventional surface treatments. MATERIALS AND METHODS: One hundred fifty square-shaped zirconia samples were divided into five groups according their surface treatment: NT Group-no surface treatment; APA25 Group-airborne abrasion with 25 μm alumina particles; TSC Group-tribochemical silica coating; FS20 Group-femtosecond laser irradiation (800 nm, 4 mJ, 40 fs/pulse, 1 kHz, step 20); and FS40 Group-femtosecond laser irradiation (same parameters except step 40). Self-adhesive resin cement cylinders were bonded at the centre of the zirconia surface. For each experimental group, half of the specimens were subject to cyclic loading under 90 N (50.000 cycles, 3 cycles/sec) and the rest of the specimens were stored in distilled water at 37°C. All subgroups were tested for SBS with a universal testing machine at a crosshead speed of 0.5 mm/min, until fracture. The results were analyzed statistically. RESULTS: When cyclic loading was applied, all surface treatments had lower SBS values, except APA25. The four surface treatments had the same SBS values when cyclic loading was employed. CONCLUSIONS: Use of femtosecond laser irradiation could be an alternative to conventional surface treatments to achieve suitable adhesion zirconia and resin cements. Femtosecond laser irradiation at step 40 is preferable because it is more efficient and faster.
BACKGROUND AND OBJECTIVE: The aim of this study was to evaluate the influence of cyclic loading on the shear bond strength (SBS) of a self-adhesive resin cement to zirconia surfaces after femtosecond laser irradiation at different steps and several conventional surface treatments. MATERIALS AND METHODS: One hundred fifty square-shaped zirconia samples were divided into five groups according their surface treatment: NT Group-no surface treatment; APA25 Group-airborne abrasion with 25 μm alumina particles; TSC Group-tribochemical silica coating; FS20 Group-femtosecond laser irradiation (800 nm, 4 mJ, 40 fs/pulse, 1 kHz, step 20); and FS40 Group-femtosecond laser irradiation (same parameters except step 40). Self-adhesive resin cement cylinders were bonded at the centre of the zirconia surface. For each experimental group, half of the specimens were subject to cyclic loading under 90 N (50.000 cycles, 3 cycles/sec) and the rest of the specimens were stored in distilled water at 37°C. All subgroups were tested for SBS with a universal testing machine at a crosshead speed of 0.5 mm/min, until fracture. The results were analyzed statistically. RESULTS: When cyclic loading was applied, all surface treatments had lower SBS values, except APA25. The four surface treatments had the same SBS values when cyclic loading was employed. CONCLUSIONS: Use of femtosecond laser irradiation could be an alternative to conventional surface treatments to achieve suitable adhesion zirconia and resin cements. Femtosecond laser irradiation at step 40 is preferable because it is more efficient and faster.
Authors: Verónica García-Sanz; Vanessa Paredes-Gallardo; Omel Mendoza-Yero; Miguel Carbonell-Leal; Alberto Albaladejo; José María Montiel-Company; Carlos Bellot-Arcís Journal: PLoS One Date: 2018-01-02 Impact factor: 3.240
Authors: Verónica García-Sanz; Vanessa Paredes-Gallardo; Carlos Bellot-Arcís; Omel Mendoza-Yero; Carlos Doñate-Buendía; Javier Montero; Alberto Albaladejo Journal: PLoS One Date: 2017-10-19 Impact factor: 3.240