1) Immediate surgical obturators (ISOs) are placed during tumor resection to provide a matrix for surgical packing and reduce contamination, enabling speech and normal swallowing postoperatively. 2) ISOs are later relined and teeth added to serve as interim obturators during wound healing. 3) For radical maxillectomies, ISOs help restore facial contours and are wired to residual structures to support surgical packing. Skin grafts and ISOs work together to rehabilitate defects.