A New Dual-cure Universal Simplified Adhesive: 18-month Randomized Multicenter Clinical Trial.

Area of Science:

• Restorative Dentistry
• Dental Materials Science
• Clinical Trials

Background:

• Non-carious cervical lesions (NCCLs) are prevalent and require effective restorative solutions.
• Dual-cure universal adhesives offer versatility but require evaluation of different application strategies.
• Understanding long-term clinical performance is crucial for material selection in NCCL treatment.

Purpose of the Study:

• To evaluate the 18-month clinical performance of a new dual-cure universal adhesive (Futurabond U).
• To compare four different adhesive application strategies: self-etch only (SEE), selective enamel etching + self-etch (SET), etch-and-rinse with dry dentin (ERDry), and etch-and-rinse with wet dentin (ERWet).
• To assess restoration characteristics including retention, marginal adaptation, marginal staining, postoperative sensitivity, and caries recurrence.

Main Methods:

• A multicenter, double-blind, split-mouth randomized clinical trial involving 50 patients and 200 NCCLs.
• Restorations were placed using Futurabond U with four distinct adhesive strategies and Admira Fusion composite resin.
• Clinical evaluation followed FDI World Dental Federation criteria at baseline and follow-up points.

Main Results:

• High retention rates were observed across all groups after 18 months (92%-94%).
• Minor marginal discrepancies were noted in 19% of restorations, with slightly more in the SEE group.
• Clinically acceptable minor marginal discoloration was observed in 7% of restorations; no postoperative sensitivity or caries recurrence occurred.

Conclusions:

• Futurabond U demonstrated reliable clinical performance for NCCL restorations irrespective of the bonding strategy employed.
• The adhesive's performance was not significantly influenced by the self-etch or etch-and-rinse application modes.
• While generally successful, the self-etch group showed a trend towards more marginal discrepancies.