Clinical Evaluation of Giomer-Based and Nanohybrid Restorative Materials in Non-Carious Cervical Lesion Class V Restorations over 72 Months: A Randomized, Split-Mouth Clinical Trial

Background/Objectives: This randomized, split-mouth clinical trial compared the 72-month clinical performance of a giomer-based restorative material (BEAUTIFIL II LS) and a nanohybrid restorative composite (Filtek Supreme Universal) in Class V non-carious cervical lesions (NCCLs). Methods: Forty-nine participants, each with two paired NCCLs, were enrolled (98 restorations) and received both materials under a standardized total-etch adhesive protocol. Clinical performance was assessed at 72 months using modified Hickel/FDI criteria across esthetic, functional, and biological domains, with between-material comparisons performed by paired nonparametric analysis (Wilcoxon signed-rank test) for complete paired observations. Results: Of the 49 participants enrolled, 26 attended the 72-month follow-up visit and 25 contributed evaluable data, yielding 44 evaluable restorations. No restoration was lost, and no statistically significant differences were detected between BEAUTIFIL II LS and Filtek Supreme Universal for any evaluated esthetic, functional, or biological criterion. Both materials showed acceptable clinical performance, with minor changes related mainly to marginal staining and marginal adaptation over time. Conclusions: BEAUTIFIL II LS and Filtek Supreme Universal showed similar long-term clinical performance in Class V non-carious cervical lesion restorations over 72 months. Within the limitations imposed by long-term attrition, material selection may be guided by clinical requirements, handling characteristics, and clinician preference.