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钴基合金已成功地应用于部分活动义齿(removable partial dentures,RPDs)修复几十年了,然而对这些支架进行修改和修补会导致它们抗腐蚀性能的降低,随之在软组织内产生刺激和生化反应。本文检查了经焊接修补后义齿的金相情况,并在高体实验中分析了这些不同金属的电化学参数E_(corr),E_(couple),i_(corr),i_(couple))。 材料和方法 把经金焊修补过的钴基金属(Co-Cr-Ni,Co-Cr-Mo)义齿支架连同包围的树脂用金刚线锯锯开,断面显示复杂的形态,主要由三种金属和腐蚀的焊区构成。将焊区金相抛光,10％硫酸电解,用SEM
Cobalt-based alloys have been successfully applied to the repair of partially removable dentures (RPDs) for decades, however, the modification and repair of these stents results in a reduction of their corrosion resistance, followed by stimulation and biochemical production in the soft tissue reaction. This paper examines the dentures after welding and repairs, and analyzes the electrochemical parameters E corr, E couple, cor cor, and couple of the different metals in high body experiments. MATERIALS AND METHODS Sections of Co-Cr-Ni, Co-Cr-Mo denture stents that had been repaired by gold welding were sawed with a diamond wire saw using a surrounding resin. The cross section showed a complex morphology consisting mainly of three metals And corrosion of the welding zone composition. Metallographic polishing zone, 10% sulfuric acid electrolysis, with SEM