PURPOSE: To compare the ability of newer adhesive resin cements and traditional glass ionomer cements to prevent microleakage under stainless steel crowns on extracted permanent third molars.

METHODS: All teeth were hand prepared and stainless steel crowns were cemented according to manufacturers' instructions. The specimens were thermocycled for 500 cycles and immersed in 2% methylene blue dye solution for 8 hours. Each tooth was imbedded in resin and cut into I mm thick sections by a slow speed diamond saw. The amount of microleakage was measured in microns under a traveling microscope. The measurements of each section of a tooth were averaged and only one number was recorded per specimen. The open margin distance for each specimen was measured. Statistical methods employed were the Kruskal-Wallis rank test and the Mann-Whitney U test.

RESULTS: Nexus 2 had statistically significant less microleakage than other three cements tested (p=0.0089). There was no statistically significant difference in microleakage between Ketac Cem and RelyX Unicem (p=0.0529) or between Ketac Cem and Maxcem (p=0.0535). There was also no statistically significant difference in microleakage was established between RelyX Unicem and Maxcem (p=0.0947).

CONCLUSIONS: Nexus 2 had statistically significant decreases in microleakage when compared with Ketac Cem, RelyX Unicem, and Maxcem cements. There were no statistically significant differences in microleakage between the remaining three cement systems.

LLU Discipline

Pediatric Dentistry


Pediatric Dentistry


Graduate Studies

First Advisor

John Peterson

Second Advisor

Jay Kim

Third Advisor

Huan Lu

Fourth Advisor

Bonnie Nelson

Degree Name

Master of Science (MS)

Degree Level


Year Degree Awarded


Date (Title Page)




Library of Congress/MESH Subject Headings

Crowns; Stainless Steel; Resin Cements; Glass Ionomer Cements; Dental Leakage



Page Count

viii; 24

Digital Format


Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.


Loma Linda University Electronic Theses and Dissertations

Collection Website



Loma Linda University. Del E. Webb Memorial Library. University Archives