Department of Prosthodontics, Faculty of Dentistry, Bursa Uludağ University, Bursa, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
BMC Oral Health. 2024 Nov 1;24(1):1326. doi: 10.1186/s12903-024-05091-y.
To investigate the effects of thermal cycling and surface treatment methods on the bonding effectiveness of multi-step resin cements to CAD/CAM blocks.
A total of 198 slices, 66 each from CAD/CAM blocks (feldspathic ceramic: Vitablocs TriLuxe Forte, V; resin matrix ceramics (RMCs): Cerasmart, C; and Shofu Block HC, S), were obtained and randomly divided into two subgroups for etching with hydrofluoric acid (HFA) and sandblasting with AlO (SB). After the surface treatments, one etched and one sandblasted sample of each CAD/CAM block was observed via SEM analysis at 500× magnification. The remaining 32 etched and 32 sandblasted samples of each CAD/CAM block were divided into two subgroups to be cemented with total-etch (TE) and self-etch (SE) resin cements. Then, half of the 16 samples in all the subgroups were subjected to aging (TC) for 5000 cycles (n = 8). The shear bond strength (SBS) of each sample was measured. Four-way analysis of variance (ANOVA) and Tukey tests were used to analyze the data (p < 0.05).
With or without TC, the highest SBS values for V were obtained with the HFA-TE and HFA-SE interactions, respectively. C presented the highest SBS values with HFA-SE and SB-TE interactions, whereas S presented the highest SBS values with SB-TE and HFA-TE interactions. Except the SB-SE interaction, C presented lower SBS values after TC than other materials. HFA created less porosity on the C and S surfaces than V. SB visibly roughened the surfaces of all the materials but caused fractures, cracks, and damage to the surfaces.
Similar SBS values can be achieved between feldspathics, RMCs, and multi-step adhesive resins with both HFA and SB treatments. However, the SBS values obtained from the SB-SE interaction may be below the recommended threshold values for all materials after TC. SB can cause distinctive cavities, fissures, and damage, especially on the surfaces of RMCs.
研究热循环和表面处理方法对多步树脂水门汀与 CAD/CAM 块粘结效果的影响。
共获得 198 个切片，每个 CAD/CAM 块（长石陶瓷：Vitablocs TriLuxe Forte，V；树脂基质陶瓷（RMCs）：Cerasmart，C；Shofu Block HC，S）各 66 个，随机分为两组进行氢氟酸（HF）蚀刻和氧化铝喷砂（SB）处理。表面处理后，在 500×放大倍数下通过 SEM 分析观察每种 CAD/CAM 块的一个蚀刻和一个喷砂样本。每个 CAD/CAM 块剩余的 32 个蚀刻和 32 个喷砂样本分为两组，用全酸蚀（TE）和自酸蚀（SE）树脂水门汀粘结。然后，所有亚组的 16 个样本中的一半（n=8）进行老化（TC）5000 个循环。测量每个样本的剪切粘结强度（SBS）。采用四因素方差分析（ANOVA）和 Tukey 检验进行数据分析（p<0.05）。
无论是否 TC，V 用 HFA-TE 和 HFA-SE 相互作用获得的 SBS 值最高。C 用 HFA-SE 和 SB-TE 相互作用获得的 SBS 值最高，而 S 用 SB-TE 和 HFA-TE 相互作用获得的 SBS 值最高。除了 SB-SE 相互作用外，C 在 TC 后 SBS 值比其他材料低。HF 在 C 和 S 表面产生的孔隙比 V 少。SB 明显使所有材料的表面变粗糙，但导致表面出现裂缝、裂纹和损伤。
HF 和 SB 处理可在长石陶瓷、RMC 和多步黏附树脂之间获得相似的 SBS 值。然而，所有材料在 TC 后从 SB-SE 相互作用获得的 SBS 值可能低于推荐的阈值。SB 会在 RMC 表面造成明显的凹坑、裂缝和损伤。
