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Disinfectant storage media and composite/metal bond strength
V D Williams1, A M Díaz-Arnold, P G Fotos
1Department of Family Dentistry, University of Iowa, College of Dentistry, Iowa City.
Purpose:
To evaluate the effect of three disinfection procedures on the tensile bond strength of Panavia resin composite cement.
Materials And Methods:
Alloy cylinders were bonded and stored in: (1) 0.2% chlorhexidine; (2) 2% activated glutaraldehyde; (3) distilled water and sterilized with ethylene oxide; and (4) distilled water. Solutions were monitored for bacterial cultures and pH changes regularly for 90 days after which all samples were tested to tensile failure.
Results:
ANOVA showed no significant difference between mean group bond strengths. A direct positive correlation was demonstrated between solution pH and bond strengths (r = 0.98). All groups were found to represent effective methods for preventing bacterial growth in storage solutions during long term cement bonding studies.