What is a significant risk factor for the incidence of furcation involvement?

Poor oral hygiene is a significant risk factor for the incidence of furcation involvement because it leads to the accumulation of plaque and calculus around the teeth, particularly in the furcation areas where the roots of multirooted teeth diverge. This accumulation can cause periodontal disease, which manifests as inflammation and destruction of the supporting structures of the tooth, including the bone and the periodontal ligament. As the periodontal tissue becomes compromised, it can progress to furcation involvement, characterized by the loss of attachment and support in these critical regions.

The presence of bacteria in plaque, combined with the body's inflammatory response, exacerbates tissue destruction in these areas. Proper oral hygiene practices, such as regular brushing, flossing, and professional cleanings, are essential in preventing periodontal disease and subsequently reducing the risk of furcation involvement. By neglecting oral hygiene, individuals significantly increase their risk of developing periodontal problems that can lead to furcation lesions.