Doğu Ömür Dede1, Murat Yenisey2, Nergiz Rona3, Figen Öngöz Dede4. 1. 1 Department of Prosthodontics, Faculty of Dentistry, Ordu University , Ordu, Turkey . 2. 2 Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayıs University , Samsun, Turkey . 3. 3 Health Ministry Oral-Teeth Health Center , Bafra, Samsun, Turkey . 4. 4 Department of Periodontics, Faculty of Dentistry, Ordu University , Ordu, Turkey .
Abstract
OBJECTIVE: The purpose of this study was to investigate the effects of carbon dioxide (CO2) and Erbium-doped yttrium aluminum garnet (Er:YAG) laser irradiations on the shear bond strength (SBS) of differently sintered zirconia ceramics to resin cement. MATERIALS AND METHODS: Eighty zirconia specimens were prepared, sintered in two different periods (short = Ss, long = Ls), and divided into four treatment groups (n = 10 each). These groups were (a) untreated (control), (b) Er:YAG laser irradiated with 6 W power for 5 sec, (c) CO2 laser with 2 W power for 10 sec, (d) CO2 laser with 4 W power for 10 sec. Scanning electron microscope (SEM) images were recorded for each of the eight groups. Eighty composite resin discs (3 × 3 mm) were fabricated and cemented with an adhesive resin cement to ceramic specimens. The SBS test was performed after specimens were stored in water for 24 h by an universal testing machine at a crosshead speed of 1 mm/min. Data were statistically analyzed with two way analysis of variance (ANOVA) and Tukey honest significant difference (HSD) test (α = 0.05). RESULTS: According to the ANOVA, the sintering time, surface treatments and their interaction were statistically significant (p < 0.05). Although each of the laser-irradiated groups were significantly higher than the control groups, there was no statistically significant difference among them (p > 0.05). CONCLUSIONS: Variation in sintering time from 2.5 to 5.0 h may have influenced the SBS of Yttrium-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics. Although CO2 and Er:YAG laser irradiation techniques may increase the SBS values of both tested zirconia ceramics, they are recommended for clinicians as an alternative pretreatment method.
OBJECTIVE: The purpose of this study was to investigate the effects of carbon dioxide (CO2) and Erbium-doped yttriumaluminum garnet (Er:YAG) laser irradiations on the shear bond strength (SBS) of differently sintered zirconia ceramics to resin cement. MATERIALS AND METHODS: Eighty zirconia specimens were prepared, sintered in two different periods (short = Ss, long = Ls), and divided into four treatment groups (n = 10 each). These groups were (a) untreated (control), (b) Er:YAG laser irradiated with 6 W power for 5 sec, (c) CO2 laser with 2 W power for 10 sec, (d) CO2 laser with 4 W power for 10 sec. Scanning electron microscope (SEM) images were recorded for each of the eight groups. Eighty composite resin discs (3 × 3 mm) were fabricated and cemented with an adhesive resin cement to ceramic specimens. The SBS test was performed after specimens were stored in water for 24 h by an universal testing machine at a crosshead speed of 1 mm/min. Data were statistically analyzed with two way analysis of variance (ANOVA) and Tukey honest significant difference (HSD) test (α = 0.05). RESULTS: According to the ANOVA, the sintering time, surface treatments and their interaction were statistically significant (p < 0.05). Although each of the laser-irradiated groups were significantly higher than the control groups, there was no statistically significant difference among them (p > 0.05). CONCLUSIONS: Variation in sintering time from 2.5 to 5.0 h may have influenced the SBS of Yttrium-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics. Although CO2 and Er:YAG laser irradiation techniques may increase the SBS values of both tested zirconia ceramics, they are recommended for clinicians as an alternative pretreatment method.
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: Freah Alshammary; Mohmed I Karobari; Ali A Assiry; Anand Marya; Gul M Shaikh; Ammar A Siddiqui; Mohammad K Alam Journal: Biomed Res Int Date: 2021-05-05 Impact factor: 3.411