de Almeida Roberto-Maia, Hass Viviane, Sasaki Debora-Yumi, Berger Sandrine-Bittencourt, Fernandes Thais-Maria, Tonetto Mateus-Rodrigues
MSc Candidate, Postgraduate Program in Integrated Dental Science, School of Dentistry, University of Cuiaba-UNIC, Cuiaba, MT, Brazil.
Postdoctoral Fellow, University of Missouri-Kansas City, School of Dentistry, Kansas City, MO, USA.
J Clin Exp Dent. 2021 Jun 1;13(6):e608-e613. doi: 10.4317/jced.58137. eCollection 2021 Jun.
To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different CAD/CAM composites treated with different surface treatments.
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%.
A higher SBS was found for BC in comparison with LU (< 0.05). All the surface treatments increased the SBS in comparison with CTL (< 0.0001). Treatment with HF, SBSL and HFSL (> 0.05) showed a higher SBS, which was followed by MEP and SB (> 0.05), all in comparison with CTL (< 0.0001). For ARI, a significant effect was detected only for the surface treatment (< 0.01), and not for CAD/CAM resin (> 0.05). Significant differences were detected between CTL to HF, and HF to MEP, as well.
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. CAD/CAM composite resin, brackets, shear bond strength, surface treatment, bonding.
研究应用于不同表面处理的不同CAD/CAM复合材料上的正畸金属托槽的剪切粘结强度（SBS）。
获取两种CAD/CAM复合材料的样本，分别为Lava Ultimate（LU；n = 60）和Brilliant Crios（BC；n = 60），根据表面处理将其随机分为六个亚组（n = 10）：对照组（CTL）；喷砂处理（SB）；喷砂和硅烷处理（SBSL）；氢氟酸处理（HF）；氢氟酸和硅烷处理（HFSL）；以及Monobond蚀刻与底涂处理（MEP）。下颌中切牙金属托槽用光固化粘合剂粘结。使用双向方差分析和土耳其检验分析SBS数据，而使用Kruskal-Wallis检验分析粘结剂残留指数（ARI），所有显著性水平均设定为5%。
与LU相比，BC的SBS更高（<0.05）。与CTL相比，所有表面处理均提高了SBS（<0.0001）。HF、SBSL和HFSL处理（>0.05）显示出更高的SBS，其次是MEP和SB（>0.05），所有这些与CTL相比均有显著差异（<0.0001）。对于ARI，仅在表面处理方面检测到显著影响（<0.01），而在CAD/CAM树脂方面未检测到显著影响（>0.05）。在CTL与HF之间以及HF与MEP之间也检测到了显著差异。
SBS受表面处理以及CAD/CAM复合材料的影响很大。表面处理可提高SBS，在正畸托槽粘结到CAD/CAM复合材料时应予以鼓励。CAD/CAM复合树脂、托槽、剪切粘结强度、表面处理、粘结
