Clinical Evaluation of BioFlx Crowns for the Restoration of Primary Teeth

Background: The “BioFlx” crowns are a new generation of crowns. They have been marketed as flexible, long-lasting, self-adapting, and life-like preformed pediatric full-coverage restorations for primary teeth that offer the flexibility and snug fit of the preformed metal crowns, and the esthetics of preformed zirconia crowns. The clinical data in the literature for this crown are still nascent and evolving. Aim: The present study evaluated the clinical performance of the BioFlx crown. Materials and methods: Fifty BioFlx crowns were cemented in children who fulfilled the inclusion criteria. The crowns were evaluated immediately before cementation and at 6 months using the modified United States Public Health Service Ryge (USPHSR) scale. Results: Descriptive statistics for each parameter in the study group were used for statistical purposes. The total number of crowns cemented, 50 (100%), compared to the number of dislodged crowns, 16 (32%), at 6 months in the “retention after cementation” parameter, were subjected to the Chi-square test. It revealed a p-value of 0.58, which was statistically insignificant. Conclusion: The BioFlx crowns showed positive results concerning resistance to dislodgement before cementation, parental acceptance of esthetics, staining, gingival health, plaque retention, and occlusal wear. The results with respect to retention, though not statistically significant, require long-term clinical follow-up. Clinical significance: This study addresses a significant gap in the clinical data regarding BioFlx crowns, a novel dental restoration material in pediatric dentistry. Marketed for their flexibility, durability, self-adaptability, and esthetic appeal, BioFlx crowns offer a comparative option to traditional preformed metal and zirconia crowns.