Which procedure is NOT performed to remove bony defects or restore normal contour?

The procedure that is not performed to remove bony defects or restore normal contour is gingivoplasty. Gingivoplasty specifically involves the reshaping or surgical alteration of the gum tissue, rather than the underlying bone. It is typically used to improve the aesthetics of the gingival margin or to correct gingival enlargement and does not directly address bony structures or defects.

In contrast, osseous surgery, osteoplasty, and osteotomy are all procedures that involve manipulating bone. Osseous surgery is a surgical intervention aimed at correcting periodontal issues by eliminating infected or damaged bone. Osteoplasty involves reshaping and contouring the bone to restore a normal appearance or facilitate better function. Osteotomy, on the other hand, involves cutting and repositioning bone to improve oral function or address deformities. Thus, these three procedures are all focused on addressing bony defects or contour, making gingivoplasty distinct in its focus on soft tissue rather than hard tissue.