The use of injectable GC Gaenial restoration in restoring hypoplastic permanent anterior teeth and the evaluation of its clinical performance using FDI criteria.

The use injectable beautiful flow giomer restoration in restoring hypoplastic permanent anterior teeth and the evaluation of its clinical performance using FDI criteria.

Direct composite resin laminate will be placed by direct layering on anterior teeth affected with enamel hypoplasia and evaluated for its clinical performance by the FDI criteria.

The teeth affected with enamel hypoplasia will be prepared by removing all defective enamel to place the restorations on sound tooth structure as recommended by the IAPD.

A tooth-by-tooth approach will be employed, where adjacent teeth will be isolated with Teflon tape before selective enamel etching. Selective etching of cut enamel will be done for 15 seconds using 37% phosphoric acid gel. Self-etch adhesive system will be used and highly filled flowable composite will be injected in the accurately positioned transparent clear stent through the small channels created by the tip of the restoration syringe in the incisal edge to restore the affected teeth.

Curing will be done on the incisal and labial aspects for 20 seconds and will be repeated after clear stent removal for additional 20 seconds. After removal of the clear stent from the patient's mouth, the restoration sprue as well as excess polymerized restoration will be scrapped off with a scalpel.

Clinical performance of an injectable giomer compared to composite restoration in permanent anterior teeth with enamel hypoplasia evaluated by FDI criteria to assess the quality of direct restorations. These are divided into functional, biological, esthetic, and miscellaneous properties. The functional properties assess the fracture of material, its retention, the marginal adaptation, the proximal contact point, the form and contour, the occlusion and wear of dental restorations. The biological assess the presence of recurrent caries, the hard dental tissue defect at the restoration margin, postoperative hypersensitivity and pulpal status, while the esthetic evaluates surface luster and texture, marginal staining, and color match. The miscellaneous examines the patient's perspective of the restoration and the radiographic appearance of the restorations. Every domain assessed is given a score from 1-5, where 1 indicates a clinically excellent property and 5 a clinically poor property.

Calculate the mean annual failure rate or the normalized failure index of the injectable giomer restoration versus the injectable composite resin restoration using the injection molding technique via the FDI criteria. This can be done by several ways: 1) dividing the total failure rate by the number of observation years, 2) using different mathematical formulas given by the FDI for its measurement.