Which material is recommended for restoring class V abrasion areas due to its adherence to tooth structure?

Glass ionomer is recommended for restoring class V abrasion areas primarily due to its unique chemical properties that enhance its adherence to tooth structure. This material chemically bonds to both the enamel and dentin, creating a stable and durable restoration that can successfully withstand the forces in a class V location, which is often subject to abrasion, cervical caries, or erosion.

In addition to its adherence, glass ionomer has the advantage of releasing fluorides over time. This property helps in the remineralization of surrounding enamel and provides ongoing protection against caries, particularly in areas where moisture control may be challenging. This makes glass ionomer particularly effective in managing the carious process and providing long-lasting results in the sensitive cervical areas of teeth.

Other materials presented in the options have their specific indications, but they do not match glass ionomer in terms of adherence to tooth structure and additional protective properties. For instance, flowable composites generally require a bonding agent for optimal adhesion, light cure composite resins may not bond as effectively in moist environments, and amalgam is not indicated for Class V restorations due to its inability to bond chemically with tooth structure. Thus, glass ionomer remains the preferred choice for restorations in class V abrasion areas.