Abstract
BACKGROUND: Stainless steel (SS) crowns are a widely accepted restorative option for primary molars due to their durability and longevity. Recently, Bioflx crowns, a biocompatible alternative, have been introduced, claiming improved esthetics and comparable clinical success. This study aims to compare the clinical success of SS crowns and Bioflx crowns in primary molars over 12 months using a split-mouth design. MATERIALS AND METHODS: A total of 40 children, aged 5-8 years, with bilateral carious primary molars were included in this 12-month prospective split-mouth study. Each child received an SS crown on one side and a Bioflx crown on the contralateral side. Standardized crown placement protocols were followed. Follow-up evaluations were conducted at 3, 6, 9, and 12 months to assess retention, marginal integrity, gingival health, and overall success. Data were statistically analyzed using the Chi-square test and paired t-test, with significance set at P < 0.05. RESULTS: At the 12-month follow-up, clinical success rates were 95% for SS crowns and 92% for Bioflx crowns. Retention was 100% for SS crowns and 98% for Bioflx crowns. Marginal integrity scores were slightly higher for SS crowns (96%) compared to Bioflx crowns (92%). Gingival health was comparable between the two groups, with no significant difference observed (P > 0.05). Patient satisfaction regarding esthetics was significantly higher for Bioflx crowns (P < 0.01). CONCLUSION: Both SS and Bioflx crowns demonstrated high clinical success rates in restoring primary molars. While SS crowns showed marginally better retention and marginal integrity, Bioflx crowns were preferred for esthetic reasons. Bioflx crowns may serve as an effective alternative to SS crowns, particularly in esthetically sensitive cases.