Interfacial Bonding Characteristics of Glass Ionomer Cement and Composite Resin Restorations

This study investigates the interfacial bonding characteristics between glass ionomer
cement (GIC) and composite resin restorations. The quality of the interface directly
affects restoration durability, marginal adaptation, and resistance to microleakage.
Factors influencing bond strength, including material composition, adhesive systems,
surface conditioning, and curing protocols, are critically evaluated. Laboratory and
clinical studies indicate that resin-modified GIC provides superior interfacial
compatibility with composite resins compared to conventional GIC due to its hybrid
chemical and polymeric structure. Surface treatment, such as mechanical
roughening and chemical conditioning, significantly improves micromechanical
interlocking. Additionally, appropriate adhesive selection and curing strategies further
enhance interfacial adhesion. This review synthesizes current evidence to provide
clinical recommendations for optimizing GIC–composite interfaces, aiming to
improve restoration longevity, reduce failure rates, and ensure predictable, esthetic
outcomes in restorative dentistry.