Effect of Tribochemical Coating on Composite Repair Strength
Operative Dentistry
|August 21, 2020
Summary
Tribochemical treatment significantly enhances composite repair strength. Using the original or a strong mechanical property composite for repair ensures optimal results for dental restorations.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Composite restorations degrade over time, necessitating repair.
- Effective composite repair requires strong interfacial bonding.
- Surface treatments can improve adhesion in composite repair.
Purpose of the Study:
- To evaluate the impact of tribochemical coating on composite-to-composite repair interfacial fracture toughness (iFT).
- To compare different surface treatments for dental composite repair.
- To determine the influence of substrate and repair composite type on iFT.
Main Methods:
- Sixty aged composite specimens (nanofill and nanohybrid) were prepared.
- Repair methods included universal adhesive, sand-blasting plus adhesive, and tribochemical coating (CoJet).
- Interfacial fracture toughness (iFT) was measured after repair and aging.
Main Results:
- Tribochemical coating (CoJet) significantly increased iFT compared to other methods.
- Repairs using the nanofill composite (Filtek Supreme Ultra) showed higher iFT.
- Surface treatment and repair composite type significantly affected iFT (p<0.0001).
Conclusions:
- Tribochemical treatment is highly effective for composite repair.
- Matching the repair composite to the original material is recommended.
- If the original material is unknown, select a composite with robust mechanical properties.
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