Influence of artificial aging on mechanical properties of commercially and non-commercially available zirconia dental implants
Influence of artificial aging on mechanical properties of commercially and non-commercially available zirconia dental implants
复制标题
DOI：
10.1016/j.jmbbm.2019.103423
复制
发表时间：
2020-01-01
影响因子：
3.9
通讯作者：
Chevalier, Jerome
中科院分区：
文献类型：
--
作者：
Monzavi, Mona;Zhang, Fei;Chevalier, Jerome
目的：评价人工老化对市售和非市售氧化锆种植体机械阻力和微力学性能的影响。方法：采用扫描电子显微镜（SEM）和x射线计算机断层扫描（X-CT）对不同晶粒尺寸的种植体系统进行扫描，包括：Z-systems (R), Straumanne (R), Zibone (R)以及市售和非市售TAV dental (R)。在134℃和2bar压力下加速老化30小时。研究了老化前后的破坏载荷，并计算了其弯矩。采用纳米压痕法对具有代表性的淄博内种植体进行老化前后的纳米压痕响应，评价老化对其硬度(H)和杨氏模量(E)的影响。采用双样本t检验统计分析确定组内弯矩的显著差异。结果：所有种植体均具有致密均匀的核结构，无孔隙。老化后各组的弯矩均显著升高(P
Objective: To evaluate the effect of artificial aging on the mechanical resistance and micromechanical properties of commercially and noncommercially available zirconia dental implants.Methods: Scanning electron microscopy (SEM) and X-ray computed tomography (X-CT) were performed on implant systems including: Z-systems (R), Straumanne (R), Zibone (R) and commercially and non-commercially available TAV dental (R) with varying grain sizes. Accelerated aging was performed at 134 degrees C and 2-bar pressure for 30 hours. Before and after aging, the mechanical load to failure was investigated and the bending moments were calculated. Nanoindentation responses of the representative Zibone implant before and after aging were performed to evaluate the effects of aging on hardness (H) and Young's modulus (E). A two-sample t-test statistical analysis was used to determine significant differences of bending moments within groups.Results: All implants presented with compact and homogenous core structures without porosities. The bending moment was significantly increased after aging for all groups (P