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

Abstract Background: 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. Aim: To clinically compare the POS and MI of Axioglass and Ionoseal liners in Class V restorations. Materials and Methods: 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). Results: 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). Conclusion: Axioglass demonstrated better long-term clinical performance than Ionoseal in Class V restorations.