- Filtek Z350 XT Universal Restorative is a universal nanocomposite with unsurpassed esthetics and outstanding strength for every restoration — anterior or posterior. Filtek Z350 XT restorative is indicated for use in: - Direct anterior and posterior restorations (including occlusal surfaces). - Core build-ups. - Splinting. - Indirect restorations (including inlays, onlays and veneers). **For further product information, please contact Chat Support**