Vertical Dimension Changes After Bioflx vs Stainless Steel Crowns in Primary Molars

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this randomized controlled trial will compare Bioflx crowns and stainless-steel crowns in children with pulp-treated primary molars. The study will evaluate changes in vertical dimension and mean biting force after crown placement and will also assess parental satisfaction with esthetics and treatment impact. Eligible children aged 6 to 9 years will be randomly assigned in a 1:1 ratio to receive either a Bioflx crown or a stainless-steel crown. Measurements will be taken at baseline, immediately after crown placement, at 1 week, and at 4 weeks.