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Micromechanical Intervention in Sandwich Restoration.
Tabinda Nawaz Khan1, Syed Yawar Ali Abidi2, Khush Bakht Nawaz Khan3
1Department of Dental Materials, Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Science, (DUHS), Karachi.
Journal of the College of Physicians and Surgeons--Pakistan : JCPSP
|November 19, 2015
Summary
Acid etching conventional or resin-modified Glass Ionomer Cements (GICs) before composite resin application does not improve sealing in sandwich restorations. Resin-modified GICs offer better sealing than conventional GICs at the GIC-resin composite interface.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials
Background:
- Sandwich restorations utilize Glass Ionomer Cements (GICs) as a base layer beneath composite resin.
- Optimizing the interface between GIC and resin composite is crucial for restoration longevity.
- Microleakage at this interface can lead to secondary caries and restoration failure.
Purpose of the Study:
- To evaluate the sealing ability of conventional GIC (CI) and resin-modified GIC (RMGIC) in sandwich restorations.
- To assess the impact of acid etching the GIC surface on microleakage at the GIC-resin composite interface.
Main Methods:
- An experimental study involved preparing 80 premolar cavities and restoring them in four groups.
- Groups involved variations in GIC type (CI vs. RMGIC) and acid etching of the GIC surface prior to composite resin application.
- Microleakage was quantified using methylene blue dye penetration and analyzed statistically.
Main Results:
- A significant difference in sealing ability was observed between RMGIC and CI (p=0.001).
- Acid etching the GIC surface did not significantly affect microleakage in either conventional or resin-modified GIC groups (p=0.656 and p=0.995, respectively).
Conclusions:
- Acid etching of GIC prior to resin composite placement does not enhance the sealing ability of sandwich restorations.
- Resin-modified GIC demonstrated superior performance in preventing dye penetration compared to conventional GIC at the GIC-resin composite interface.
