The Bioceramic Putty will be inserted in the apical 4 mm of the canal using the modified cannula and adapted to the canal walls with a hand plugger.

A large sized (#80 - #120, and a taper of 2%) gutta-percha cone (GC) will be inserted, measuring according to the width of the canal, to the working length, then the immature canal will be gently filled with Bioceramic sealer and the GC.

The immature canal will be gently filled with Bioceramic sealer and then 3 to 5 small balls of BP will be inserted into the canal orifice and gently plugged with hand pluggers.

Under local anesthesia and rubber dam isolation, the canal orifice will be prepared gently. The working length and apex diameter value will be recorded as a reference. Afterward, shaping and debridement the root canals will be achieved by gentle instrumentation. The canal will be irrigated copiously with NaOCl, then dried, and filled with Ca(OH)2 dressing. Afterward, the incisor will be temporarily restored. After 14 days the temporary filling and Ca(OH)2 will be removed. Afterward, canals will be irrigated with NaOCl and EDTA and dried. The Bioceramic Putty will be inserted in the apical 4 mm of the canal using the modified cannula and adapted to the canal walls with a hand plugger. The correct placement and thickness of the apical plug will be verified with a periapical radiograph. Afterward, the remainder of the root canal will be filled with gutta-percha with sealer. Finally, a suitable immediate final restoration was made for each case individually.

Patients of both groups will be recalled after 1, 3, 7, and 14 days of treatment and during radiographical assessment periods (3, 6 and 12 months), where they will be asked to rate their pain on the Wong-Baker Faces Scale, where children will set their pain levels by choosing a face; 0 = No Hurt, 1 = Hurts little bit, 2 = hurts Little more 3 = Hurts even more, 4 = Hurts whole lot, and 5 = Hurts worst. Moreover, the presence of fistula, swelling, and movement will be recorded.

After coronal restoration is completed a control x-ray will be taken. The periapical status will be assessed at the time of obturation-restoration, 3, 6, and 12 months following endodontic treatment. The outcome will be determined according to the Periapical Index scoring system: (1) normal periapical structures (The best); (2) small changes in bone structure; (3) changes in bone structure with some mineral loss; (4) periodontitis with well-defined radiolucent area; (5) severe periodontitis with exacerbating features (The worst).

The teeth will be evaluated according to healed, healing or unsuccessful as a primary radiographical outcome.