Endodontic flare-up in patients with endodontic therapy referred to Tehran Dentistry school 2003-2004


Kazem Ashofteh Yazdi 1 , * , Mostafa Rahmani 2

1 Department of Endodontics, Tehran University of Medical Sciences, Tehran, Iran.

2 Dentist.

How to Cite: Ashofteh Yazdi K, Rahmani M. Endodontic flare-up in patients with endodontic therapy referred to Tehran Dentistry school 2003-2004, Hormozgan Med J. 2004 ; 8(3):e90724.


Hormozgan Medical Journal: 8 (3); e90724
Published Online: September 15, 2004
Article Type: Research Article
Received: February 03, 2004
Accepted: September 15, 2004


Introduction: An ongoing and frequently vexing problem in endodontics is the
development of pain and swelling (flare-up) during or after endodontic therapy.
Despite significant progress in the field of endodontics, the causes of flare-up are
not well defined and are a subject of controversy.
The purpose of this study was to determine the incidence of endodontic flare-up.
The incidence of flare-up was also examined in relation to patient factors and the
quality of treatment performed.
Methods: In this cross-sectional study information from the charts of 518 patients
who received root canal therapy by undergraduate students in dentistry faculty of
Tehran medical science university in years 2003-2004 was recorded and
analyzed. All of patients were included in this study with no precondition. No
intracanal medicaments were placed interappointment. The chi-square analysis
was used to compare the variables and significant level was considered as
Results: The results demonstrated 102 (25.3%) of the 403 patients had a flare-up
characterized by swelling or moderate-to-severe pain that begun after the
finishing of endodontic treatment. Also 43 (10.2%) of the 518 patients had an
interappointment flare-up characterized by swelling or moderate-to-severe pain
during the interappointment time interval of Endodontic treatment. We concluded
that some factors, such as sex of patients, tooth type, presence of preoperative
pain, perforation, and number of appointments had significant effects on the
incidence of endodontic flare-up.
Conclusion: Because of the great incidence of endodontic flare-up, it is necessary
to accentuate it in theoretical endodontic lessons.



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