Hey Drs , I started this case more than 5 months ago , An open apex in a lower lateral incisor with history of trauma , X-rays showed immature apex and radiolucency periapically . ( refer to interesting case ) . Well,What I did along the past five months was opening the root canal , careful filing and copious irrigation and filling the canal with Ultradent Calcium hydroxide paste . I have been doing this every 10 days for 5 months and guess what happened ? First , A slight radio-opaque lining could be seen along the apical root part with slight narrowing of the apex . second , the Radiolucent area encircling the apex started showing a radio opaque well demarcated area ( i'm not sure whether that means that bone is being formed or not ) . But still the progress is extremely slow and I am wondering if it's wise to obturate the canal using the Soft Gutta percha technique or should I better wait till the periapical radiolucency is reduced in size .. Any Suggestions here ?