Int J Prosthodont. 2022 Jul-Aug;35(4):545-552. doi: 10.11607/ijp.7563.
To evaluate the shear bond strength (SBS) of different digital veneering techniques for zirconia and to critically discuss its suitability for application in single-implant prosthetics.
A total of 112 square-shaped zirconia specimens were provided with four different veneering materials (n = 28 per group): a glass-ceramic (group GLA), a feldspathic ceramic (group FEL), a polymer-infiltrated ceramic network (group PIC), and a resin nanoceramic (group RNC). Discs in group GLA were sintered onto the core material, whereas all other specimens were adhesively connected. In each group, 14 specimens (GLA0, FEL0, PIC0, RNC0) were subjected to SBS testing before thermocycling, and the other 14 (GLA1, FEL1, PIC1, RNC1) were tested after thermocycling (10,000 cycles). Data were analyzed by applying SPSS software (P < .05). The surfaces and fracture patterns of the specimens were examined using scanning electron microscopy (SEM).
Mean SBS values ranged from 14.09 ± 3.87 MPa (RNC1) to 40.82 ± 4.91 MPa (GLA0). Group GLA presented higher values than all other groups (P < .001). Groups FEL, PIC, and RNC showed no statistically significant differences between them. SBS decreased after thermocycling, but no significant impact was found. Every group exhibited a characteristic failure mode.
All digital veneering techniques sufficed to present clinically acceptable SBS values and might be viable alternatives in implant prosthetics. However, some have yet to demonstrate their long-term clinical suitability. At present, lithium disilicate-veneered zirconia abutments and monolithic lithium disilicate hybrid abutment crowns seem to present a proven and reliable restorative option.
评估不同数字贴面技术对氧化锆的剪切结合强度（SBS），并批判性地讨论其在单植入体修复中的适用性。
共提供了 112 个方形氧化锆样本，使用了四种不同的贴面材料（每组 n = 28）：玻璃陶瓷（GLA 组）、长石陶瓷（FEL 组）、聚合物渗透陶瓷网络（PIC 组）和树脂纳米陶瓷（RNC 组）。GLA 组的圆盘烧结在核心材料上，而其他所有样本均通过黏接连接。在每组中，14 个样本（GLA0、FEL0、PIC0、RNC0）在热循环前进行 SBS 测试，其余 14 个样本（GLA1、FEL1、PIC1、RNC1）在热循环后（10000 次循环）进行测试。数据使用 SPSS 软件进行分析（P<.05）。使用扫描电子显微镜（SEM）检查样本的表面和断裂模式。
平均 SBS 值范围为 14.09 ± 3.87 MPa（RNC1）至 40.82 ± 4.91 MPa（GLA0）。GLA 组的平均值高于其他所有组（P<.001）。FEL、PIC 和 RNC 组之间没有统计学上的显著差异。热循环后 SBS 降低，但没有显著影响。每个组都表现出一种特征性的失效模式。
所有数字贴面技术都足以提供临床可接受的 SBS 值，并且可能是种植体修复的可行替代方案。然而，一些技术仍需证明其长期临床适用性。目前，锂硅玻璃陶瓷贴面氧化锆基台和整体式锂硅玻璃陶瓷混合基台冠似乎提供了一种可靠的修复选择。
