Managing teeth that are deciduous, deformed, decayed, or traumatized using tooth-colored restorations can be challenging, especially with young children who may have specific behavioral intervention issues. For deciduous teeth with developmental abnormalities, multi-surface caries, high-caries patients, broken teeth, teeth where direct restorations tend to fail, following pulpal treatment, as space maintainer abutments, and teeth with severe wear, extra-coronal full-coverage crowns are recommended to ensure effective treatment. In pediatric dentistry, several full coverage restoration techniques are available. The Bioflx crown is a new type of synthetic crown that offers improved adaptation, durability, ease of handling, and better aesthetics compared to conventional crowns. Bioflx crowns are becoming more popular and are a viable option for treating carious teeth in young children. This case report describes the first use of a Bioflx crown in managing a multi-surface caries lesion in an 8-year-old girl. There are no published case reports on the use of Bioflx crowns for primary molars; however, these crowns serve as a suitable alternative to full crown restoration.