Purpose: to retrospectively evaluate the prevalence of root perforations and associated pathological changes in the adjacent periodontal tissues
•Full PA status survey were evaluated for patients accepted for tx between 1990-2008 and demographic data recorder
•Radiographs digitized and evaluated by 2 examiners
•For each patient, total number of teeth and endo-treated teeth recorded then teeth divided into groups: Mand molars, Max molars, Mand premolars, Max premolars, Mand anteriors, Max anteriors
•For teeth with perforations; location, size, and pathological changes in PDL (RL) recorded.
•Location depending on crestal bone level: coronal, crestal, apical.
•Size: Large (>0.5 mm), small (<0.5 mm)
N = 2002 (1010 male, 992 female) / 5048 teeth
•116 perforations located in 101 patients (2.3% of ETT)
•Crestal perforations were associated with more pathological changes in PDL
•100% of pathological changes were associated with large crestal perforations
•Perforations occurred in mandibular molars more significantly (24% of all ETT, and 54% of all perforations)
if perforation occurs, the main goal is to seal the PDL and prevent long-term damage. Proper knowledge and careful procedure could prevent it, but if occurs, sealing is the aim.