Which of the following is NOT considered a mucogingival problem requiring plastic surgery?

The absence of interproximal papilla is not categorized as a mucogingival problem that necessitates plastic surgery. Mucogingival problems typically address issues involving the gingival margin and the relationship between the gingiva and underlying mucosa, particularly in cases that can affect aesthetics or function.

Gingival recession is a condition where the gum tissue has receded, exposing the roots of the teeth, which can cause sensitivity and aesthetic concerns; thus, it is often treated with surgical procedures. Excessive gingival display, also known as a "gummy smile," can lead to aesthetic concerns because it involves the visibility of a greater amount of gingival tissue when smiling, and surgical intervention can help in contouring the gums. A frenum attachment at the gingival margin can also pose problems, as it can lead to gingival recession or other periodontal issues, making surgical correction necessary in some cases.

In contrast, the absence of interproximal papilla refers to the lack of the triangular piece of gum tissue between teeth, which can occur due to periodontal disease or other factors. While this condition can lead to aesthetic concerns, it does not typically require surgical intervention in the same way that the other listed conditions do, since it does not directly