Effect of Cement Gap on the Retention of Zirconia Crowns | ||
| Al-Azhar Journal of Dental Science | ||
| Article 3, Volume 23, Issue 3, July 2020, Pages 235-240 PDF (455.32 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajdsm.2020.24992.1009 | ||
| Authors | ||
| Ahmed Yousef Elbieh* 1; Hesham Ibrahim Othman2; Khaled Mohamed Haggag2 | ||
| 1Al-Azhar University (Cairo-boys) | ||
| 2Crown and Bridge Department, Faculty of Dental Medicine, Al-Azhar University(Boys- Cairo) Egypt | ||
| Abstract | ||
| Objective: To evaluate the effect of different cement gap on retention of zirconia crowns cemented with resin cement. Materials and methods: Thirty sound natural human molar teeth were collected and mounted in an acrylic mold. Teeth were prepared through a Computerized Numerical Control CNC, and then zirconia crowns fabricated by cad/cam. Samples were divided into 3 subgroups according to the cement gap(CG) (n=10): 25µm (CG25), 50µm (CG50), 100µm (CG100). Zirconia crowns cemented with Breeze Self-Adhesive Resin Cement. Samples were thermocycled for 5000 cycles between two water baths at 5°C and 55°C with a dwell time of 20 seconds and 10 seconds of transfer time. Samples were subjected to tensile test using universal testing machine, dislodgment force recorded in MPa. Results: No significant difference was found between mean pull-out bond strength at different cement gaps. Conclusion: The cement gap did not affect the retention of zirconia crowns cemented with resin cement. | ||
| Keywords | ||
| Cement gap; Retention; Resin cement; Zirconia | ||
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