An 18-month clinical evaluation of prolonged polymerization of a universal adhesive in non-carious cervical lesions: A double-blind randomized clinical trial

• Published in: Dental materials Vol. 38; no. 1; pp. 68 - 78
• Main Authors: Hass, Viviane, Matos, Thalita P., Parreiras, Sibelli O., Szesz, Anna Luiza, de Souza, Jullian J., Gutiérrez, Mario F., Reis, Alessandra, Loguercio, Alessandro D.
• Format: Journal Article
• Language: English
• Published: England Elsevier Inc 01.01.2022; Elsevier BV
• Subjects: Adaptation; Adhesives; Clinical trial; Clinical trials; Composite materials; Composite Resins; Curing; Dental caries; Dental Cements; Dental Marginal Adaptation; Dental Restoration, Permanent; Dentin-Bonding Agents; Double-blind studies; Humans; Lesions; Non-carious cervical lesion; Polymerization; Polymerization time; Resin Cements; Retention; Tooth Cervix - pathology; Universal adhesive system; Variance analysis; Non-carious cervical lesion; Polymerization time; Clinical trial; Universal adhesive system
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/j.dental.2021.10.012

This study aimed to evaluate the effect of prolonging polymerization time on the 18 months clinical performance of a universal adhesive system used as etch-and-rinse (ER) and self-etch (SE). 140 restorations were randomly placed in 35 subjects according to the following groups: ER10 (light-curing for 10 s); ER40 (light-curing for 40 s); SE10 (light-curing for 10 s) and; SE40 (light-curing for 40 s/1200 mW/cm2). A resin composite was placed incrementally. The restorations were evaluated at baseline and after 18 months by using the FDI criteria. The following outcomes were evaluated: marginal staining, marginal adaptation, spontaneous post-operative sensitivity and recurrence of caries. The differences among the groups were calculated using Friedman repeated measures analysis of variance rank (α = 0.05). After 18 months the retention/fracture rates were 88.9% (95%CI 74.1–95.6%) for ER10, 94.3% (95%CI 91.4–98.5%) for ER40, 77.2% (95%CI 60.1–87.9) for SE10 and 97.2% (95%CI 85.5–99.9%) for SE40. A significant difference was detected in the retention rate when SE10 was compared to the SE40 (p = 0.01). Also, ER40 showed a significant improvement of the marginal adaptation when compared to ER10 (p = 0.01). This is the first study that demonstrates an improvement in the clinical performance of universal adhesive systems in non-carious cervical lesions when prolonged light-cured was applied.