@article{ajbr20251313,
author={Humayyani, Nouf Al},
title={Laboratory Evaluation of the Fracture Resistance of CAD/CAM- Manufactured Zirconium Crown on Primary Teeth: A Comparison of Two Different Cement Types and Gap Widths},
journal={American Journal of Biomedical Research},
volume={13},
number={1},
pages={15--19},
year={2025},
url={https://pubs.sciepub.com/ajbr/13/1/3},
issn={2328-3955},
abstract={<b>Background</b>: The current research aimed to assess the outcome of dissimilar cement types on the strength of zirconium crowns fabricated by a computer-aided design and manufacturing (CAD/CAM) system at varying occlusal cement gap widths for primary molars. <b>Methods</b>: A total of 40 extracted mandibular deciduous 2<SUP>nd</SUP>. molars were prepared and randomly allocated into two main sets and two subgroups, totaling 4 groups according to the cement type and occlusal gap width. After preparation, the deciduous molars were implanted in methyl methacrylate blocks. The restorations were made-up from zirconium (InCoris TZI C, Sirona Dental Systems, GmbH, Bensheim, Germany) using CAD/CAM system, with occlusal cement gap widths of 100 ¦Ìm and 200 ¦Ìm, and were then glass ionomer cement and adhesive resin cements were used to cement the crowns. Fracture strength was measured for all samples at a crossheading speed of 10 mm/min, and the values were verified in Newtons (N). statistical analysis of results were done through the Shapiro¨CWilk normality test and independent t-tests. A significance level of <i>p</i> &lt; 0.05 was used for all analyses. <b>Results</b>: Cement type and cement gap width had statistically insignificant effect on the zirconium fracture strength of (<i>p</i> > 0.05). The greatest fracture resistance was detected in the 100 ¦Ìm cement gap and adhesive resin cement group (3847¡À984,74 N). <b>Conclusions</b>: Zirconia crowns fabricated using CAD/CAM technology demonstrated high fracture strength when placed on primary teeth. Different cement types and gap widths may be considered clinically acceptable alternatives in pediatric applications.},
doi={10.12691/ajbr-13-1-3}
publisher={Science and Education Publishing}
}