•Purpose: to determine how successful various post removal techniques were and the incidence of root fractures during post removal .
•N= 1600 teeth (part 1; incidence of fracture), 234 (part2; detailed analysis) •Materials/Methods:
•Part one was a review of patient records for teeth that had posts removed. •No clinical or radiographic signs or symptoms to suggest the presence of a root fracture prior to post removal.
•trans- illuminating light was used immediately after post removal and at all subsequent appointments along with Periodontal probing during the endodontic re-treatment and follow-up examinations.
•a sample of 234 of these 1600 teeth was analyzed in a prospective manner during a 2 years period to determine the tooth type, the type of post being removed, the device and method used to remove the post, and the time taken to remove the post and core and whether any roots had fractured during post removal.
• Most highlighted Results:
1.All of the 1600 posts were successfully removed and only one root (0.06%) fractured during post removal.
2.The mean time required to remove the 234 posts was 6.5 min, the mode was 3 min
3.Most cast posts were removed with an Eggler post remover but some dislodged when the crown was removed. Table
4.Most parallel-sided posts were removed with ultrasonics and threaded posts were unscrewed.
5.The Masserann kit and ultrasonics were combined to remove fractured cast posts and some parallel-sided posts.
If appropriate techniques and devices are used for the particular type of post being removed, then root fracture is a rare occurrence.