Objective: evaluation of fiberglass crown and stainless steel crown as a full crown restoration for primary molars. Subjects and methods: Forty molars teeth indicated for crown restoration. Bilateral crowns to first or second primary molars, one side was restored by stainless steel crowns (group A), and the other side was restored by fiberglass crowns (group B). Teeth were randomly assigned to Figaro or PMC crown groups. Modified United States Public Health Service (USPHS) criteria were used to evaluate recurrent caries marginal integration crown retention and gingival status at 48 hrs 3 and 6 months. Results: After six months of follow-up, the Fiberglass crown showed a significant difference in crown retention than the stainless-steel crowns (SSCs) with recurrent caries and gingival inflammation. Conclusions: Despite their unattractive appearance, stainless steel crowns are still the ideal restoration for compromised primary molar teeth