Purpose: Evaluate fiberglass and stainless steel crowns to restore primary molars (clinical and radiograph) Subjects and methods: Forty molars teeth indicated for crown restoration. Patients were selected from the outpatient Clinic of the Department of Pedodontics and Oral Health, Faculty of Dental Medicine, Al-Azhar University. 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 at48 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). Associated with recurrent caries and gingival inflammation. Conclusions: Stainless steel crowns continue to be the restoration of choice for compromised primary molar teeth despite unpleasant esthetics.