Abstract
Introduction
The aim of this study was to radiographically evaluate the relationship between the
quality parameters of root canal fillings (apical extension, homogeneity, and taper)
and periapical status. In addition, groups of teeth and complicating factors of endodontic
treatment were assessed.
Methods
This retrospective cohort study assessed the quality and periapical status of root-filled
canals in a 4- to 7-year follow-up period. Each parameter was dichotomized into ideal
and altered conditions. A root-filled canal with an ideal condition for all 3 parameters
was considered perfect, whereas the loss of 1 or more ideal conditions defined satisfactory
or deficient fillings, respectively. The periapical statuses at baseline and follow-up
were classified as normal, slight widening of the apical periodontal ligament, or
periapical lesion.
Results
A total of 291 root-filled canals were evaluated. The prevalence of perfect, satisfactory,
and deficient fillings was 54.6%, 37.5%, and 7.9%, respectively (P < .05). The periapical status at follow-up showed normal, slight widening of the
apical periodontal ligament, or periapical lesion in 69.8%, 19.2%, and 11% of the
roots, respectively (P < .05). The multivariate logistic regression showed that only preoperative periapical
lesions (odds ratio, 2.99; 95% confidence interval, 1.27–7.03) and altered tapers
(odds ratio, 3.73; 95% confidence interval, 1.51–9.24) were significantly associated
with postoperative periapical lesions.
Conclusions
Radiographic parameters of the quality of root-filled canals showed a significant
relationship with the periapical status. Nevertheless, an altered taper was the main
factor associated with the maintenance or development of periapical lesions after
4- to 7-year follow-up period.
Key Words
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Article info
Publication history
Published online: October 21, 2010
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
