Osseo-integration procedure, fixation of transmucosal abutment to fixtures that are placed following:(a) resection of part of the maxilla or mandible for a benign or a malignant tumour; or(b) segmental loss from trauma or congenital absence of a segment of the maxilla or mandible (multiple adjacent teeth)Fixture must be placed at site of the missing segment following appropriate reconstructive procedures (Anaes.)