Interim obturator in cleft palate patients is placed at what time?

Interim obturator: Form during 2nd phase of post-surgical prosthodontic treatment. Formed after 2-6 weeks postsurgically. Main objective is to provide patient comfort & easy function till healing. In small defects, in which patient is able to function normally with immediate surgical obturator, this interim obturator is not necessary. Final definitive prosthesis made after 3-6 months post-surgery (Third phase)