Which characteristic is unique to diabetes mellitus-associated gingivitis?

Question

Quizplus · Accepted Answer

Characteristics are similar to plaque-induced gingivitis,but severity is related to control of blood glucose levels rather than to plaque control.
Inflammation present at the gingival margin is not unique to diabetes mellitus-associated gingivitis.
Bleeding is seen with many forms of gingivitis and is not unique to diabetes-associated gingivitis.
Changes in contour are present in many forms of gingivitis.

Which Characteristic Is Unique to Diabetes Mellitus-Associated Gingivitis