Related Experiment Video
Updated: Jul 22, 2026
Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
Effects of electrobrightening on the fit surface of cobalt-chromium RPD frameworks
G F Sinclair1, D R Radford, M Sherriff
1Division of Prosthetic Dentistry, Floor 20, Guy's Tower, Guy's Hospital, London SE1 9RT, United Kingdom.
Purpose:
The purpose of this study was to compare 3 different electrobrightening techniques and 3 electrolytic solutions in their effects upon the fit surface of cast cobalt-chromium frameworks.
Materials And Methods:
Fifty cast cobalt-chromium frameworks, which were subsequently divided into batches of 10, were prepared according to a standard protocol. Three electrobrightening techniques were tested initially using a single brand of electrolyte (Croform) and a batch of 10 frameworks per technique. The loss of metal by weight was determined from the fit surface of each casting. The least corrosive technique of these 3 was used again with 2 other brands of electrolyte (Nobilium and E501) in a repetition of the protocol. The fit surfaces of 8 random samples cut from each batch of electrobrightened castings were viewed by scanning electron microscope (SEM).
Results:
Statistical analysis applying a one-way analysis of variance and Bonferroni's multiple comparison of means test demonstrated that one immersion of the framework for 10 minutes at 1 amp when used in conjunction with Nobilium electrolyte removed the least metal (P = 0.001). The SEM study suggested that the Nobilium electrolyte also produced the smoothest surface.
Conclusion:
Electrobrightening techniques affect the amount of metal removed, and the electrolytic solution used influences the resultant surface.
