Fixed Prosthodontics Department, Faculty of Dentistry, University of Minia, Minia, Egypt.
J Prosthodont Res. 2012 Jul;56(3):204-9. doi: 10.1016/j.jpor.2011.10.001. Epub 2012 May 10.
Studying the effect of surface roughness and thermal cycling on titanium-ceramic bonding.
One hundred fourteen samples in the form of bar for the C.P. titanium and Ti-6Al-4V alloy were used. They were divided into two groups according to the type of bar. Each group was then subdivided according to the type of surface treatment to three subgroups, control, airborne-particle abrasion and silica coated. Each subgroup was subdivided into two classes according to the type of test (surface roughness and bond strength). Samples used for the bond strength test were veneered. These samples were subdivided into two subclasses according to thermal cycling; whether without thermal cycling or after 6000 thermal cycles.
The surface roughness test results showed that silica coating recorded the highest surface roughness. Also C.P. titanium gave higher value of surface roughness than Ti-6Al-4V alloy. As regard the bond strength, the airborne-particle abrasion classes and the silica coated classes recorded bond strength values above the acceptable limit of 25 MPa determined in ISO 9693. As regard thermal cycling, the results showed that aging by thermal cycling decreased the metal-ceramic bond strength.
The airborne-particle abrasion and the silica coating are acceptable treatments for titanium-ceramic restorations. Increasing surface roughness of C.P. titanium and Ti-6Al-4V alloy not necessarily results in an increase in their bond strength to ceramics. Aging affects the metal-ceramic bond strength.
研究表面粗糙度和热循环对钛陶瓷结合的影响。
采用 C.P. 钛和 Ti-6Al-4V 合金棒形式的 114 个样本。根据棒的类型将它们分为两组，然后根据表面处理的类型将每组分为三组，对照组、喷丸处理组和二氧化硅涂层组。根据测试类型（表面粗糙度和结合强度）将每组进一步分为两类。用于结合强度测试的样本被贴面。根据是否经过热循环或经过 6000 次热循环，这些样本进一步分为两类。
表面粗糙度测试结果表明，二氧化硅涂层的表面粗糙度最高。C.P. 钛的表面粗糙度值也高于 Ti-6Al-4V 合金。至于结合强度，喷丸处理组和二氧化硅涂层组的结合强度值高于 ISO 9693 规定的 25MPa 的可接受限值。关于热循环，结果表明，热循环老化会降低金属-陶瓷结合强度。
喷丸处理和二氧化硅涂层是钛陶瓷修复的可接受处理方法。增加 C.P. 钛和 Ti-6Al-4V 合金的表面粗糙度不一定会导致其与陶瓷的结合强度增加。老化会影响金属-陶瓷结合强度。
