Roberto-Maia de Almeida1, Viviane Hass2, Debora-Yumi Sasaki3, Sandrine-Bittencourt Berger4, Thais-Maria Fernandes4, Mateus-Rodrigues Tonetto5. 1. MSc Candidate, Postgraduate Program in Integrated Dental Science, School of Dentistry, University of Cuiaba-UNIC, Cuiaba, MT, Brazil. 2. Postdoctoral Fellow, University of Missouri-Kansas City, School of Dentistry, Kansas City, MO, USA. 3. Undergraduate Student, School of Dentistry, University of North Parana - UNOPAR, Londrina, PR, Brazil. 4. Associate Professor, Postgraduate Program in Dentistry, School of Dentistry, University of North Parana - UNOPAR, Londrina, PR, Brazil. 5. Associate Professor, Postgraduate Program in Integrated Dental Science, School of Dentistry, University of Cuiaba-UNIC, Cuiaba, MT, Brazil.
Abstract
BACKGROUND: To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different CAD/CAM composites treated with different surface treatments. MATERIAL AND METHODS: Specimens of two CAD/CAM composites were obtained of Lava Ultimate (LU; n=60) and Brilliant Crios (BC; n=60) which were randomly separated into six subgroups (n=10) according to the surface treatment: control (CTL); sandblasting (SB); sandblasting and silane (SBSL); hydrofluoric acid (HF); hydrofluoric acid and silane (HFSL); and Monobond Etch&Prime (MEP). The mandibular central incisor metal brackets were bonded with a light-cure adhesive. The SBS data were analyzed using the two-way analysis of variance and Turkey's test, while the adhesive remnant index (ARI) by the Kruskal-Wallis, all the significance was set at 5%. RESULTS: A higher SBS was found for BC in comparison with LU (p< 0.05). All the surface treatments increased the SBS in comparison with CTL (p< 0.0001). Treatment with HF, SBSL and HFSL (p> 0.05) showed a higher SBS, which was followed by MEP and SB (p> 0.05), all in comparison with CTL (p< 0.0001). For ARI, a significant effect was detected only for the surface treatment (p< 0.01), and not for CAD/CAM resin (p> 0.05). Significant differences were detected between CTL to HF, and HF to MEP, as well. CONCLUSIONS: The SBS is highly affected by the surface treatment and also by the CAD/CAM composite. The surface treatment improves the SBS and should be encouraged when orthodontic brackets are bonded to CAD/CAM composites. Key words:CAD/CAM composite resin, brackets, shear bond strength, surface treatment, bonding. Copyright:
BACKGROUND: To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different CAD/CAM composites treated with different surface treatments. MATERIAL AND METHODS: Specimens of two CAD/CAM composites were obtained of Lava Ultimate (LU; n=60) and Brilliant Crios (BC; n=60) which were randomly separated into six subgroups (n=10) according to the surface treatment: control (CTL); sandblasting (SB); sandblasting and silane (SBSL); hydrofluoric acid (HF); hydrofluoric acid and silane (HFSL); and Monobond Etch&Prime (MEP). The mandibular central incisor metal brackets were bonded with a light-cure adhesive. The SBS data were analyzed using the two-way analysis of variance and Turkey's test, while the adhesive remnant index (ARI) by the Kruskal-Wallis, all the significance was set at 5%. RESULTS: A higher SBS was found for BC in comparison with LU (p< 0.05). All the surface treatments increased the SBS in comparison with CTL (p< 0.0001). Treatment with HF, SBSL and HFSL (p> 0.05) showed a higher SBS, which was followed by MEP and SB (p> 0.05), all in comparison with CTL (p< 0.0001). For ARI, a significant effect was detected only for the surface treatment (p< 0.01), and not for CAD/CAM resin (p> 0.05). Significant differences were detected between CTL to HF, and HF to MEP, as well. CONCLUSIONS: The SBS is highly affected by the surface treatment and also by the CAD/CAM composite. The surface treatment improves the SBS and should be encouraged when orthodontic brackets are bonded to CAD/CAM composites. Key words:CAD/CAM composite resin, brackets, shear bond strength, surface treatment, bonding. Copyright:
Authors: Aline Scalone Brentel; Mutlu Ozcan; Luiz Felipe Valandro; Lilian Guimarães Alarça; Regina Amaral; Marco Antonio Bottino Journal: Dent Mater Date: 2006-12-26 Impact factor: 5.304
Authors: Ravikumar Ramakrishnaiah; Abdulaziz A Alkheraif; Darshan Devang Divakar; Jukka P Matinlinna; Pekka K Vallittu Journal: Int J Mol Sci Date: 2016-05-27 Impact factor: 5.923