Clinical and radiological evaluation of two types of composite material strip crown in primary molars:A randomized Clinical trial

Objectives: This clinical study compared two distinct types of resin composite strip crowns against stainless-steel crowns on primary molars over four different periods (1 week, 1 month, 3 months, and 6 months) to see which one performed better clinically and radiographically. subjects and methods: In this study, 36 child with decayed primary molars, ages 4 to 8, were divided into three groups: Group I : Primary molar teeth restored with stainless-steel crowns (control group), Group II : Primary molar teeth restored with resin-based composite strip crowns (test group), and Group III: Primary molar teeth restored with zirconia-filled composite strip crowns (test group). Results: The findings of this research were that there was statistically significant difference between mechanical failure (fracture/retention) scores in the three tested groups after 1 week, 3 month, and 6 months of follow-up periods, however, no statistically significant difference could be found after 1 month of follow-up. Additionally, the results of this study revealed that was no statistically significant difference between the three tested groups at baseline, 1, 3, and 6 months regarding to gingival condition and also regarding the radiographic evaluation. Conclusion: Strip crowns could be possible esthetic alternative for stainless steel crowns. Zirconia-filled composite is better than conventional type clinically and radiographically. ZFCSCs revealed clinical success over a period of 6 months. Keywords: primary molars ,stainless steel crown, strip crown, esthetic , Resin composite ,zirconia filled composite Restorative dentistry, Strip crown ,radiographic evaluation, gingival index, fracture of restoration.