通过 SiO2-ZrO2 涂层对透明氧化锆进行表面处理以提高结合强度。

†Qiao Du, DDS, Department of Stomatology, Beijing Integrated Traditional Chinese and Western Medicine Hospital, Beijing, China.

†Tiehan Cui, DDS, Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.

Oper Dent. 2023 Nov 1;48(6):666-676. doi: 10.2341/22-121-L.

BACKGROUND

Translucent monolithic zirconia ceramics have been applied in dental clinics due to their esthetic translucent formulations and mechanical properties. Considering inherent ceramic brittleness, adhesive bonding with resin composite increases the fracture resistance of ceramic restorations. However, zirconia is a chemically stable material that is difficult to adhesively bond with resin.

OBJECTIVES

To investigate the influences of SiO2-ZrO2 coatings on adhesive bonding of zirconia and the surface characterization of those coatings.

METHODS AND MATERIALS

Translucent zirconia discs were classified into groups based on surface treatments: CT (control), SB (sandblasting), C21(SiO2:ZrO2=2:1), C11(SiO2:ZrO2=1:1), and C12 (SiO2:ZrO2=1:2) (n=10). Surface characterization of coatings on zirconia were analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), surface roughness assessment (Ra), X-ray diffraction (XRD), water contact angle (WCA), translucency parameter (TP), and shear bond strength (SBS). Two-way ANOVA for shear bond strength results and ANOVA for Ra and WCA were performed.

RESULTS

SEM images revealed SiO2 islands on zirconia disks coated with SiO2-ZrO2. Surface roughness of C12, C11, and C21 groups was significantly larger than those of groups SB and CT (p<0.05). XRD results showed that phase transformation of zirconia disks was detected only in the SB group. In addition, SiO2-ZrO2 coatings reduced WCA. The translucency decreased only in group C21. Group C11 showed the highest shear bond strength under both aging conditions.

CONCLUSION

SiO2-ZrO2 coating is a promising method to enhance the adhesive resin bonding of translucent zirconia without causing phase transformation of translucent zirconia.

背景

由于具有美学半透明配方和机械性能，透明整体氧化锆陶瓷已在牙科临床中得到应用。考虑到陶瓷固有的脆性，用树脂复合材料进行胶接可以提高陶瓷修复体的抗断裂能力。然而，氧化锆是一种化学稳定性高、难以与树脂胶接的材料。

目的

研究 SiO2-ZrO2 涂层对氧化锆胶接的影响及其表面特性。

方法和材料

将透明氧化锆圆盘按表面处理分为 CT（对照）、SB（喷砂）、C21（SiO2:ZrO2=2:1）、C11（SiO2:ZrO2=1:1）和 C12（SiO2:ZrO2=1:2）组（n=10）。采用扫描电子显微镜（SEM）、能谱（EDX）、表面粗糙度评估（Ra）、X 射线衍射（XRD）、水接触角（WCA）、透光率参数（TP）和剪切结合强度（SBS）对氧化锆上涂层的表面特性进行分析。对剪切结合强度结果进行双因素方差分析，对 Ra 和 WCA 进行单因素方差分析。

结果

SEM 图像显示，SiO2-ZrO2 涂层在氧化锆盘上呈现 SiO2 岛状。C12、C11 和 C21 组的表面粗糙度明显大于 SB 和 CT 组（p<0.05）。XRD 结果表明，仅在 SB 组中检测到氧化锆盘的相转变。此外，SiO2-ZrO2 涂层降低了 WCA。仅在 C21 组中，透光率下降。在两种老化条件下，C11 组的剪切结合强度最高。