We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
Quintessence International



Forgotten password?


Quintessence Int 30 (1999), No. 3     1. Mar. 1999
Quintessence Int 30 (1999), No. 3  (01.03.1999)

Page 199-208

Two-body sliding wear of a direct-filling silver alternative to amalgam
Xu / Giuseppetti / Eichmiller / Ives
Objective: This study investigated the wear resistance of a mercury-free silver direct-filling material and a dental amalgam. Method and materials: A precipitated silver powder was rinsed with dilute fluoboric acid and consolidated into a cohesive solid. For tooth cavity restoration and flexural testing, the silver was consolidated with a dental amalgam plugger at a load of 15 N. For wear testing, because of the relatively large specimen size, the silver was pressed at a rpessure of 150 MPa, yielding a density similar to that obtained by hand consolidation. Results: The silver had a flexural strength twice that of amalgam. Pin-on-disk wear resulted in a smooth surface and hardening in silver, as measured by indentation inside the wea r tracks, in contrast to the damage that was found in amalgam. The wear track cross-sectional area (n = 12) at 10 to the sixth power revolutions was not statistically significantly different among amalgam, polished silver, and burnished silver. Conclusion: The consolidated silver exhibited work hardening and surface densification during wear and, as a result, was more resistant to wear-induced damage than amalgam.