Which of the following is an advantage of using resin modified glass ionomer to treat root caries?

• A. Fluoride release
• B. Minimal microleakage
• C. Both Fluoride release and Minimal microleakage
• D. High thermal conductivity

Answer: (C)

When treating root caries, two practical advantages matter: helping remineralize demineralized dentin and forming a reliable seal at the tooth-restoration interface. Resin-modified glass ionomer cements deliver both. The material continuously releases fluoride, which supports remineralization of the exposed root dentin and helps inhibit further bacterial activity in the lesion-prone root area. At the same time, the combination of glass ionomer chemistry with resin modification improves bonding to dentin and creates a tighter seal, reducing microleakage around the restoration. This dual benefit—ongoing fluoride release plus a better marginal seal—makes resin-modified glass ionomer especially advantageous for root caries. High thermal conductivity is not a notable advantage in this context.