Department of Prosthodontics and Implantology, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India.
J Indian Prosthodont Soc. 2024 Apr 1;24(2):159-164. doi: 10.4103/jips.jips_476_23. Epub 2024 Apr 23.
: (1) The aim of this study was to evaluate the effect of a ceramic bonder at the metal ceramic interface in sintered and casted cobalt–chromium (Co–Cr) alloy. (2) To compare the shear bond strength between the different manufacturing techniques: Casting and direct metal laser sintering (DMLS).
: comparative study.
: For the casting group, 40 clear acrylic patterns with dimensions of 20 mm × 10 mm × 2.5 mm were designed in a software and casted with Co–Cr alloy. For DMLS samples, a standard tessellation language file with the abovementioned dimensions was created through a software to fabricate 40 samples. All the samples were equally distributed into the following four groups: Group A – Casted samples with the application of Cerambond ( = 20). Group B – Casted samples without application of Cerambond ( = 20). Group C – DMLS samples with application of Cerambond ( = 20). Group D – DMLS without application of Cerambond ( = 20). Ceramic buildup was done on all 80 samples, followed by firing up to a temperature of 920°C in a ceramic furnace. SBS was evaluated using a universal testing machine and failure modes were examined under the electron microscope.
: ANOVA test and Tukey’s honestly significance difference post hoc test for multiple comparisons.
: One-way analysis of variance test revealed that the shear load and bond strength values of all four groups were statistically different with < 0.001. Tukey’s test showed statistically significant difference among the four groups. The mean shear strength of Group C was significantly greater when compared to other groups, respectively.
: Within the limitations of this study, the application of Cerambond to both casted and sintered samples showed significantly increased SBS values and it was also observed that sintered samples had higher strength than casted samples. Altogether, the results indicate that the use of Cerambond increased the shear strength between cobalt Cr alloy and ceramics, thereby prolonging the longevity of the restorations.
（1）本研究旨在评估陶瓷偶联剂在烧结和铸造钴铬（Co-Cr）合金金属陶瓷界面中的作用。（2）比较不同制造技术之间的剪切结合强度：铸造和直接金属激光烧结（DMLS）。
比较研究。
对于铸造组，使用软件设计了 40 个尺寸为 20mm×10mm×2.5mm 的透明丙烯酸图案，并使用 Co-Cr 合金铸造。对于 DMLS 样品，通过软件创建了具有上述尺寸的标准镶嵌语言文件，以制造 40 个样品。所有样品均等分为以下四组：组 A-应用 Cerambond 的铸造样品（=20）。组 B-未应用 Cerambond 的铸造样品（=20）。组 C-应用 Cerambond 的 DMLS 样品（=20）。组 D-未应用 Cerambond 的 DMLS 样品（=20）。对所有 80 个样品进行陶瓷堆积，然后在陶瓷炉中加热至 920°C。使用万能试验机评估 SBS，并在电子显微镜下检查失效模式。
单因素方差分析和 Tukey Honestly 显著性差异事后检验用于多组比较。
单因素方差分析检验表明，四组的剪切载荷和结合强度值均具有统计学差异（<0.001）。Tukey 检验表明四组之间存在统计学差异。与其他组相比，组 C 的平均剪切强度明显更高。
在本研究的限制范围内，Cerambond 应用于铸造和烧结样品均显示出明显增加的 SBS 值，并且还观察到烧结样品比铸造样品具有更高的强度。总之，结果表明 Cerambond 的使用增加了钴铬合金与陶瓷之间的剪切强度，从而延长了修复体的使用寿命。
