A very quick and wide separation of teeth causes which of the following?

The occurrence of very quick and wide separation of teeth can lead to necrosis of bone due to the stress and trauma imposed on the surrounding tissues. When teeth are separated rapidly, this may not only disrupt the normal alignment and supporting structures but can also compromise the blood supply to the alveolar bone, leading to necrosis. This process involves the death of bone tissue due to insufficient blood flow, which can result from the sudden mechanical changes experienced during the separation.

In contrast, while gingival inflammation might occur due to other periodontal issues, it is not a direct result of the teeth separating rapidly. Vasodilation refers to the widening of blood vessels, which is a physiological response to various stimuli and not necessarily linked to the mechanical phenomenon of tooth separation. Wider spaces might describe the physical appearance resulting from separation, but it does not address the pathological consequence of bone necrosis that can occur with rapid movement. Thus, necrosis of bone is the most directly related consequence of such rapid and significant separation of teeth.