Journal
DENTAL MATERIALS
Volume 21, Issue 5, Pages 445-453Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2004.07.009
Keywords
cementing agent; microleakage; marginal gap; full cast crowns
Ask authors/readers for more resources
Objectives. To evaluate microleakage and marginal gaps in full cast crown restorations bonded with six different types of cementing agents. Methods. Sixty non-carious human premolars; and molars were prepared in a standardized manner for full cast crown restorations. The mesial and distal margins were located in dentin, white the vestibular and palatal/lingual margins were located in enamel. Crowns were made from a high-gold alloy using a standardized technique. The specimens were randomized to six groups of cementing agents: one zinc-phosphate cement (Harvard cement), one conventional glass-ionomer cement (Fuji 1), one resin-modified glass-ionomer cement (Fuji Plus), two standard resin cements (RelyX ARC, Panavia F), and one self-adhesive universal resin cement (RelyX Unicem). After 4 weeks of storage in distilled water at 37 degrees C, the specimens were subjected to 5000 thermocycles ranging from 5 to 55 degrees C. Then, they were placed in a silver nitrate solution, embedded in resin blocks, and vertically cut in buccolingual and mesiodistal direction. Subsequently, the objects were evaluated for microleakage and marginal gap using a high-resolution digital microscope camera. Results. A number of inter-group differences were statistically significant. RelyX Unicem showed the smallest degree of microleakage both in enamel and in dentin. Panavia F und RelyX Unicem were associated with significantly larger marginal gaps than all other cementing agents. No association was observed between microleakage and marginal gap other than a weak direct correlation when using Harvard cement on enamel. Significance. The cementing agents investigated revealed different seating abilities. These differences were not associated with specific types of materials. (c) 2004 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available