To Evaluate Clinical Performance of Preformed Zirconia Crowns, Computer-aided Design and Computer-aided Manufacturing Zirconia Crowns, and Bioflx Crowns in Primary Molars Postendodontic Therapy.

At 9 and 12 months, group A (CAD/CAM zirconia) maintained color stability, group B (preformed zirconia) declined moderately, and group C (Bioflx) showed significant color mismatch, with statistical significance noted at 9 months ( p = 0.034) and highly significant at 12 months ( p = 0.0001).

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