What is the primary cause of periodontitis?

Periodontitis primarily arises from unchecked gingivitis, which is an inflammation of the gums that occurs when plaque build-up is not effectively controlled. When gingivitis is left untreated, it can progress to periodontitis, leading to more severe symptoms affecting the structures supporting the teeth, such as the bone and connective tissue. This progression is characterized by deeper pockets forming between the teeth and gums, loss of attachment, and potentially tooth loss.

In the context of the other options, crowding of teeth might contribute to difficulties in maintaining oral hygiene, but it is not a direct cause of periodontitis. Late-night gum chewing does not relate to the inflammatory processes that lead to periodontitis, and while dental abscesses can occur as a result of periodontal disease, they are not a primary causative factor for the disease itself. Understanding the relationship between gingivitis and periodontitis is crucial in recognizing how oral health practices can prevent the advancement of gum diseases.