532 - Retention of Bioflx crowns, Zirconia Crowns Compared to Stainless Steel Crowns: In Vitro.

Abstract:

Background: .
For Primary teeth with large, multi-surface carious lesions, the American Academy of Pediatric Dentistry recommends the use of a full-coverage restoration.Nu Smile BioFLX is the latest pediatric crown material introduced in 2022. They offer properties of both stainless steel and zirconia crowns. Retention of the crown is an important clinical factor for success. A previous in vitro study found that stainless steel crowns exhibit higher retention over zirconia crowns on extracted primary mandibular second molars.
However, there is no evidence in the literature of the mechanical properties of Bioflex crowns compared with other materials. So, Further studies on this material are needed.

Aim:
To compare in vitro the retention of Nusmile BioFLX, EZ Sprig zirconia, the standard of care stainless steel crowns in extracted primary mandibular second molars.

Methods:
A pilot study was conducted with a total of 15 extracted primary mandibular second molars and was allocated randomly to one of the three groups (5 teeth per group). The sample size was determined based on the results of the pilot study. All teeth were mounted in Dentsply acrylic molds and prepared for crown cementation. Crowns were cemented with glass ionomer cement. Retention testing was performed using Instron 68TM-10. Differences in retention between the groups were tested via one way Anova with Tukey’s HSD for post hoc tests..

Results: Pending.

Conclusion: Peding

Identify Supporting Agency and Grant Number: Research supported by Tufts University School of Dental Medicine’s Dental Research Administration, Boston, Massachusetts and it is determined to constitute non-human subjects research.