Performance of composite-reinforced glass ionomer liners in class V restorations

Postoperative sensitivity (POS) and marginal integrity (MI) are common concerns in Class V restorations because of dentin exposure and polymerization shrinkage stress. Composite-reinforced glass ionomer liners have been introduced to improve stress absorption and marginal sealing.

To clinically compare the POS and MI of Axioglass and Ionoseal liners in Class V restorations.

In this randomized, single-blinded clinical study, 60 patients requiring Class V restorations were allocated into two groups: Axioglass (n = 30) and Ionoseal (n = 30). Restorations were placed using a self-etch adhesive system followed by the respective liner. POS was assessed using the Schiff Sensitivity Scale at baseline, 1 week, 1 month, 6 months, and 12 months. MI was evaluated using modified USPHS criteria at 12 months. Statistical analysis included repeated-measures analysis of variance, independent t-test, and Chi-square test (P < 0.05).

Both materials showed a significant reduction in POS over time (P < 0.001). Axioglass demonstrated significantly lower sensitivity at 6 and 12 months and superior MI compared with Ionoseal (P < 0.05).

Axioglass demonstrated better long-term clinical performance than Ionoseal in Class V restorations.