Prosthodontic Unit, Department of Restorative Dentistry, UCL Eastman Dental Institute, University College London, London, United Kingdom.
School of Dentistry, University of Sydney, Australia.
J Oral Implantol. 2021 Oct 1;47(5):370-379. doi: 10.1563/aaid-joi-D-19-00139.
This study compared titanium (Ti), palladium (Pd), platinum (Pt), and gold (Au) ion release following induced accelerated tribocorrosion from three Au alloy abutment groups coupled with Ti implants over time; investigated contacting surface structural changes; and explored the effect of Au plating. Three abutment groups, G (n = 8, GoldAdapt, Nobel Biocare), N (n = 8, cast UCLA, Biomet3i), and P (n = 8, cast UCLA, Biomet3i, Au plated), coupled with implants (Nobel Biocare), immersed in 1% lactic acid, were cyclically loaded. Ions released (ppb) at T1, T2, and T3, simulating 3, 5, and 12 months of function, respectively, were quantified by inductively coupled plasma mass spectrometry (ICP-MS) and compared. Surface degradation and fretted particle composition after T3 were evaluated with scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDX). ICP-MS data were nonparametric, expressed as medians and interquartile ranges. SEM/EDX showed pitting, crevice corrosion, and fretted particles on the components. Released ion concentrations in all groups across time significantly decreased for Pd (P < .001, median range: 1.70-0.09), Pt (P = .021, 0.55-0.00), and Au (P < .001, 1.01-0.00) and increased for Ti (P = .018, 2.49-5.84). Total Ti release was greater than other ions combined for G (P = .012, 9.86-2.30) and N (P < .001, 13.59-5.70) but not for P (P = .141, 8.21-3.53). Total Ti release did not differ between groups (P = .36) but was less variable across group P. On average, total ion release was 13.77 ppb (interquartile range 8.91-26.03 ppb) across the 12-month simulation. Tribocorrosion of Ti implants coupled with Au abutments in a simulated environment was evidenced by fretted particles, pitting, and crevice corrosion of the coupling surfaces and release of ions. More Ti was released compared with Pd, Pt, and Au and continued to increase with time. Abutment composition influenced ion release. Au-plated abutments appeared to subdue variation in and minimize high-concentration spikes of titanium.
本研究比较了三种金合金基台与钛种植体结合后，在诱导加速摩擦腐蚀下，不同时间内钛（Ti）、钯（Pd）、铂（Pt）和金（Au）离子的释放情况；研究了接触表面结构的变化；并探讨了金镀层的影响。三个基台组，G（n = 8，GoldAdapt，Nobel Biocare）、N（n = 8，铸造 UCLA，Biomet3i）和 P（n = 8，铸造 UCLA，Biomet3i，Au 镀层），与植入物（Nobel Biocare）结合，浸入 1%乳酸中，进行周期性加载。通过电感耦合等离子体质谱法（ICP-MS）定量分析了分别模拟 3、5 和 12 个月功能的 T1、T2 和 T3 时释放的离子（ppb），并进行了比较。使用扫描电子显微镜和能量色散 X 射线光谱法（SEM/EDX）评估了 T3 后组件的表面降解和微磨粒的组成。ICP-MS 数据为非参数数据，以中位数和四分位距表示。SEM/EDX 显示了组件上的点蚀、缝隙腐蚀和微磨粒。所有组在整个时间内 Pd（P <.001，中位数范围：1.70-0.09）、Pt（P =.021，0.55-0.00）和 Au（P <.001，1.01-0.00）的释放离子浓度显著降低，Ti（P =.018，2.49-5.84）增加。对于 G（P =.012，9.86-2.30）和 N（P <.001，13.59-5.70），总 Ti 释放量大于其他离子的总和，但 P 组则不然（P =.141，8.21-3.53）。各组间总 Ti 释放量无差异（P =.36），但 P 组间变异性较小。平均而言，在模拟 12 个月的实验中，总离子释放量为 13.77 ppb（四分位距 8.91-26.03 ppb）。在模拟环境中，Ti 植入物与 Au 基台的摩擦腐蚀通过耦合表面的微磨粒、点蚀和缝隙腐蚀以及离子的释放得到了证明。与 Pd、Pt 和 Au 相比，Ti 的释放量更多，并且随着时间的推移继续增加。基台组成影响离子释放。Au 镀层基台似乎抑制了 Ti 浓度的波动，并将高浓度峰值最小化。
