A 24-month clinical evaluation of composite resins with different viscosity and chemical compositions: a randomized clinical trial

• Published in: Quintessence international (Berlin, Germany : 1985) Vol. 54; no. 3; p. 186
• Main Authors: Matos, Thalita de Paris, Nuñez, Alejandra, Méndez-Bauer, María, Ñaupari-Villasante, Romina, Barceleiro, Marcos, Duarte, Luiza, Reis, Alessandra, Loguercio, Alessandro D
• Format: Journal Article
• Language: English
• Published: Germany 17-03-2023
• Subjects: Adult; Composite Resins - chemistry; Composite Resins - therapeutic use; Dental Caries - therapy; Dental Marginal Adaptation; Dental Restoration, Permanent - methods; Humans; Methacrylates - chemistry; Organically Modified Ceramics; Resin Cements; Viscosity; dental restoration; randomized clinical trial; clinical performance; noncarious cervical lesions; retention rate
• ISSN: 1936-7163
• DOI: 10.3290/j.qi.b3631841

To evaluate the clinical performance of two methacrylate-based flowable composites and an ormocer-based flowable composite in noncarious cervical lesions (NCCLs) in adult participants.
In total, 183 restorations were performed on NCCLs. All cavities were restored using a universal adhesive system (Futurabond U, Voco) with selective enamel etching and with one of the three evaluated flowable composites (n = 61): low-viscosity methacrylate-based composite (GrandioSO Flow, LV), high-viscosity methacrylate-based composite (GrandioSO Heavy Flow, HV), and an ormocer-based flowable composite (Admira Fusion Flow, ORM). All restorations were evaluated using FDI and USPHS criteria after 24 months. Kruskall-Wallis analysis of variance rank (α = .05) was used for statistical analysis.
After 24 months of clinical evaluation, 16 restorations were lost (LV = 3, HV = 10, ORM = 3) and the retention rates (95% confidence interval) were 95.0% for LV, 82.2% for HV, and 95.0% for ORM, with statistical differences observed between HV and LV as well as HV and ORM (P < .05). When secondary parameters were evaluated, no significant differences between groups were observed (P > .05). Thirty-three restorations (LV = 8, HV = 13, ORM = 12) showed minor marginal staining, 71 restorations (LV = 26, HV = 20, ORM = 25) presented small marginal adaptation defects, and one restoration for HV presented recurrence of caries.
The universal adhesive associated with the ormocer-based and methacrylate-based flowable composite showed promising clinical performance after 24 months. However, the heavy-flow restorations showed significantly more failures. (Quintessence Int 2023;54:186-199; doi: 10.3290/j.qi.b3631841).