Mertsöz Burak, Ongun Salim, Ulusoy Mutahhar
Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin 10, Lefkosa 99040, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Final International University, Nicosia 99010, Turkey.
Materials (Basel). 2023 Mar 2;16(5):2059. doi: 10.3390/ma16052059.
The aim of this study was to evaluate the fracture resistance and marginal adaptation of endo-crown restorations produced from different resin-matrix ceramics (RMS) and the effects of these materials on marginal adaptation and fracture resistance. Three frasaco models were used by preparing (first) premolar teeth in three different margin preparations: butt-joint, heavy chamfer and shoulder. Each group was further divided into four subgroups according to the type of restorative material used: Ambarino High Class (AHC), Voco Grandio (VG), Brilliant Crios (BC) and Shofu (S) ( = 30). Master models were obtained using an extraoral scanner and fabricated with a milling machine. Marginal gap evaluation was performed with a silicon replica technique using a stereomicroscope. Replicas of the models ( = 120) were produced with epoxy resin. The fracture resistance of the restorations was recorded using a universal testing machine. The data were statistically analyzed using two-way ANOVA, and a t-test was applied for each group. Tukey's post-hoc test was performed to compare significant differences ( ≤ 0.05). The highest marginal gap was observed in VG, and the best marginal adaptation and the highest fracture resistance were found in BC. The lowest fracture resistance in Butt-joint preparation design was found in S. In addition, the lowest fracture resistance value in the heavy chamfer preparation design was found in AHC. The heavy shoulder preparation design displayed the highest fracture resistance values for all materials.
本研究的目的是评估由不同树脂基陶瓷（RMS）制成的桩核冠修复体的抗折性和边缘适应性，以及这些材料对边缘适应性和抗折性的影响。使用三个弗拉萨科模型，通过在三种不同的边缘制备方式下制备（第一）前磨牙：对接、深斜面和肩台。根据所使用的修复材料类型，每组进一步分为四个亚组：安巴利诺高级（AHC）、沃科格兰迪奥（VG）、辉煌克里奥斯（BC）和松风（S）（每组 = 30）。使用口外扫描仪获得主模型，并使用铣床制作。使用立体显微镜通过硅橡胶复制技术进行边缘间隙评估。用环氧树脂制作模型的复制件（ = 120）。使用万能试验机记录修复体的抗折性。使用双向方差分析对数据进行统计分析，并对每组应用t检验。进行Tukey事后检验以比较显著差异（ ≤ 0.05）。在VG中观察到最高的边缘间隙，在BC中发现最佳的边缘适应性和最高的抗折性。在对接制备设计中，S的抗折性最低。此外，在深斜面制备设计中，AHC的抗折性值最低。对于所有材料，重肩台制备设计显示出最高的抗折性值。
