This study will evaluate the performance of three different tooth-colored onlay materials in adult patients' posterior teeth. First, investigators will use a bulk-fill composite resin to raise the cavity margin above the gum line and below the contact point. Then each patient will receive three onlays made from different materials. Investigators will follow patients at 2 weeks, 6 months, 18 months, and 24 months to assess how well the onlays fit, function, and whether restorations cause sensitivity or new decay. The results will help dentists choose the most durable onlay restorations for deep-margin elevation cases.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
18
Single indirect onlay restoration milled from an IPS e.max CAD block and crystallized according to the manufacturer's Instructions for Use, then adhesively luted on a randomized molar under.
Single indirect onlay restoration heat-pressed from an IPS e.max Press ingot and then adhesively luted on a randomized molar under rubber-dam isolation.
Single indirect onlay restoration milled from a BRILLIANT Crios block and then adhesively luted on a randomized molar under rubber-dam isolation.
Faculty of Dentistry, Mansoura University
Al Mansurah, Dakahlia Governorate, Egypt
RECRUITINGFDI criteria score-functional (F1 Fracture/Retention; F2 Marginal Adaptation), biological (B1-B3), and miscellaneous (M2) domains.
Each onlay will be scored per the Revised 2023 World Dental Federation (FDI) criteria across the specified domains (F1, F2, B1, B2, B3, M2). Outcomes will be summarized as (a) mean (SD) score for each domain, and (b) proportion of restorations rated 1-3 (clinically acceptable) vs 4-5 for each domain. Lower scores indicate better clinical performance.
Time frame: Post-cementation baseline (2 weeks), 6, 12, 18, and 24 months
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