• The goal of this clinical trial is to evaluate the clinical effectiveness of bioflex crowns and zirconia crowns compared to stainless steel crowns when * restoring primary molars 45 participant who their ages range between 6 and 8 years participated in this study. The participants will be divided into three groups: group (A) for Bioflex crown (n=15), group (B) for Zirconia crown (n=15) and group ( C) for Stainless steel crown(n=15). The periodontal health will be evaluated using gingival index and plaque index .Clinical success will be assessed according to the Modified United States Public Health Service Evaluation (USPHS) criteria regarding: crown retention ,marginal integrity, surface roughness and color change. Moreover, parental and child satisfaction will be evaluated.
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gingival health
Timeframe: follow up at 3,6 and 9 months