Flores-Ferreyra Blanca Irma, Moyaho-Bernal María de Los Angeles, Chavarría-Lizárraga Héctor Nahum, Castro-Ramos Jorge, Franco-Romero Guillermo, Velázquez-Enríquez Ulises, Flores-Ledesma Abigailt, Reyes-Cervantes Eric, Ley-García Ana Karina, Velasco-León Estela Del Carmen, Carrasco-Gutiérrez Rosendo Gerardo
Facultad de Estomatología, Benemérita Universidad Autónoma de Puebla, 31 Poniente 1304, Volcanes, Puebla de Zaragoza 72410, Mexico.
Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología, Universidad Autónoma del Estado de México, Jesús Carranza esq. Paseo Tollocan, Col. Universidad, Toluca 50130, Mexico.
Materials (Basel). 2025 Aug 14;18(16):3822. doi: 10.3390/ma18163822.
Despite aesthetic trends, metal-ceramic restorations continue to be widely accepted due to their durability, and variations in surface preparation process can significantly influence bond strength outcomes. The purpose of this study was to determine whether there are differences in the bond strength depending on three surface treatment protocols for veneering ceramics on Ni-Cr alloys. The following surface treatments were used: (1) control (C) (no treatment), (2) airborne-particle abrasion (APA) with 50 µm AlO (G1-APA), (3) APA followed by oxidation (G2-APA-O), and (4) APA-O, with a second APA (G3-APA-O-APA). Subsequently surface roughness (R and R) was evaluated using profilometry, hardness was measured through Leeb's hardness dynamic test (HLD), morphology was investigated through scanning electron microscopy (SEM), and the chemical composition of the alloy surface was evaluated using energy-dispersive spectroscopy (EDS). After surface treatments, veneering ceramic was applied, the debonding crack initiation strength (DCIS) was investigated through the three-point bending test, failure mode was classified using a stereoscopic microscope, and chemical characterization of the fractured surfaces was performed using Raman spectroscopy (RS). For DCIS, G2-APA-O demonstrated the highest value 63.97 ± 44.40 (MPa) ( < 0.05). The results of this study indicate that oxidation treatment has a positive effect on the bonding strength between veneering ceramic and Ni-Cr alloys.
尽管存在美学趋势，但金属陶瓷修复体因其耐久性仍被广泛接受，并且表面处理工艺的变化会显著影响粘结强度结果。本研究的目的是确定在镍铬合金上进行三种陶瓷贴面表面处理方案时，粘结强度是否存在差异。使用了以下表面处理方法：（1）对照（C）（未处理），（2）用50 µm氧化铝进行空气颗粒研磨（G1-APA），（3）空气颗粒研磨后进行氧化处理（G2-APA-O），以及（4）氧化处理后再进行一次空气颗粒研磨（G3-APA-O-APA）。随后，使用轮廓仪评估表面粗糙度（R和R），通过里氏硬度动态测试（HLD）测量硬度，通过扫描电子显微镜（SEM）研究形态，并使用能量色散光谱（EDS）评估合金表面的化学成分。表面处理后，施加陶瓷贴面，通过三点弯曲试验研究脱粘裂纹起始强度（DCIS），使用立体显微镜对失效模式进行分类，并使用拉曼光谱（RS）对断裂表面进行化学表征。对于DCIS，G2-APA-O表现出最高值63.97±44.40（MPa）（P<0.05）。本研究结果表明，氧化处理对陶瓷贴面与镍铬合金之间的粘结强度有积极影响。
