A surgical obturator is used immediately after maxillectomy surgery to close the defect and facilitate wound healing. It provides support for surgical dressings, helps maintain oral functions like speech and swallowing, and protects the surgical site from contamination. This obturator is carefully designed and inserted during or just after surgery, distinguishing it from interim or definitive obturators used in later treatment phases. Its primary role is to assist in the initial postoperative period, promoting patient comfort and recovery.

Reference: Prosthodontics, Shigli A, 2nd Edition.