Aesthetic anterior teeth restoration in adolescence patients is a great challenge for a pediatric dentist. A number of factors should be taken into account, including minimum invasiveness, adequate durability and satisfactory restoration aesthetics. One of the methods of tooth reconstruction may be an innovative injection technique - Flowable Injection Technique. It is a semi-indirect method that allows to copy diagnostic wax-up from master model to Patient's mouth using liquid composite material.  An index is made of transparent silicone, which is placed in the patient's mouth as a template for future reconstruction. The composite is injected with holes previously made in the index. The transparent index enables visual inspection of applyed material and effective polymerization. This technique can be used in many clinical cases, both temporary and permanent, such as restoration of damaged teeth structure as a result of caries or injury or lost as a result of pathological tooth wear as well as developmental defects. This articule describes two cases where injection technique was used to restore the front teeth in school-aged children.