A clinical study of new dental resin. Part 2 Evaluation of wear resistance.

概要

論文の詳細を見る
Electrode potentials of non precious alloy crowns in the mouth were measured in a clinical situation using a pH-meter in conjunction with a platinum micro-probe and a saturated calomel electrode. Nine patients who participated in the study were restorated with crowns which were prepared from commercial dental alloys of Co-Cr, Ni-Zn-Cu and Ni-Cr. During a period of three months after the cementation of the crowns the electrode potentials of the crowns were in the range of -0.21 V (SCE) for Co-Cr crowns, -0.10--0.20 V (SCE) for Ni-Zn-Cu crowns and -0.13--0.21 V (SCE) for Ni-Cr crowns and were roughly the same for all non precious alloy crowns examined. The measurements of electrode potential in vitro showed that the potentials of the alloys in 0.1 N sodium chloride solutions were close to the potentials in the mouth. In acid solutions, however, the electrode potentials of the alloys were noble to those in neutral or alkaline solutions.
社団法人日本補綴歯科学会の論文