COMPARATIVE ANALYSIS OF MARGINAL ADAPTATION AND MICROLEAKAGE IN CAD-CAM HYBRID-CERAMIC VERSUS INDIRECT COMPOSITE ONLAYS Article Swipe

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Saba Khan , Fozia Bari , Ambreen Azam , Kinza Manzoor ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.53555/91xznr22

Marginal adaptation and microleakage are key factors that affect the long-term success of onlay restorations. CAD-CAM hybrid-ceramic materials may offer better fit and sealing compared with conventional indirect composites, but local evidence is limited. Objective: To compare the marginal adaptation and microleakage of CAD-CAM hybrid-ceramic onlays with indirect composite onlays after thermocycling. Materials and Methods: Eighty extracted mandibular molars were prepared using a standardized MOD cavity design. Teeth were randomly divided into two groups: hybrid-ceramic onlays (PICN blocks) and laboratory-processed indirect composite onlays. All restorations were cemented with dual-cure resin cement under standardized load. Specimens underwent 5,000 thermocycles (5°C–55°C). Marginal gaps were measured before and after aging using a digital stereomicroscope. Microleakage was assessed using methylene blue dye penetration on sectioned samples. Data were analyzed to compare both groups. Results: Hybrid-ceramic onlays showed significantly smaller marginal gaps before aging (37–40 μm) than composite onlays (103–113 μm). After thermocycling, hybrid-ceramic margins remained within clinical limits (63–66 μm), while composites increased to 112–123 μm. Hybrid-ceramic onlays also showed lower microleakage (mean 11.6%) compared with composites (mean 21.7%).

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Landing Page: https://doi.org/10.53555/91xznr22
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DOI: https://doi.org/10.53555/91xznr22

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Title: COMPARATIVE ANALYSIS OF MARGINAL ADAPTATION AND MICROLEAKAGE IN CAD-CAM HYBRID-CERAMIC VERSUS INDIRECT COMPOSITE ONLAYS

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Publication year: 2024

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Publication date: 2024-01-01

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Authors: Saba Khan, Fozia Bari, Ambreen Azam, Kinza Manzoor

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Landing page: https://doi.org/10.53555/91xznr22

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