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Performance of direct and indirect onlay restorations for structurally compromised teeth
1Assistant Professor, Department of Restorative Dentistry, Faculty of Dentistry, College of Dental Medicine, University of Umm Al Qura, Makkah, Saudi Arabia..
Fiber-reinforced composite resin shows superior fracture resistance and less microleakage for restoring compromised posterior teeth compared to CAD-CAM options. This direct restoration method offers a viable alternative for dental repair.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials Engineering
Background:
- Limited research exists on restoring structurally compromised posterior teeth with direct composite resin or indirect restorations.
- Evaluating novel materials for enhanced dental restoration durability is crucial.
Purpose of the Study:
- To compare the fracture resistance and microleakage of various onlay restorations for compromised teeth.
- To assess both conventional and digital computer-aided design and computer-aided manufacturing (CAD-CAM) fabrication methods.
Main Methods:
- 54 mandibular molars were prepared for onlay restorations and divided into three material groups: nanohybrid composite, resin hybrid ceramic, and fiber-reinforced composite resin.
- Restorations were bonded with dual-polymerized adhesive resin cement, followed by thermocycling and cyclic loading.
- Fracture resistance and microleakage were evaluated, with data analyzed using Fischer exact test.
Main Results:
- Fiber-reinforced composite resin exhibited statistically significant higher fracture resistance (P<.001).
- This material also demonstrated significantly less microleakage compared to other tested groups (P=.013).
Conclusions:
- Direct fiber-reinforced composite resin is a potential alternative to CAD-CAM composite resin for restoring structurally compromised teeth.
- This finding supports the use of advanced composite materials in restorative dental procedures.
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