Fig. 1
From: Pain levels and typical symptoms of acute endodontic infections: a prospective, observational study
Flow chart depicting the decisions why patients were excluded from the study. All emergency patients presenting with severe pain originating from a single endodontically involved tooth in the course of 64 weeks were initially considered. Teeth diagnosed with an acute apical abscess were then excluded. SIP symptomatic irreversible pulpitis, SAP symptomatic apical periodontitis.