Apical periodontitis
Apical periodontitis Apical periodontitis is an inflammatory lesion in theperiodontal tissues that is caused mostly by bacterialelements derived from the infected root canal system of teeth (Core concept 7.1). Ion-treated teeth apical periodontitisrepresents a defensive response to a primaryinfection in a necrotic pulp. Apical periodontitis may alsodevelop due to a