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Association between missed canals and apical periodontitis
F F N P Costa1, J Pacheco-Yanes1, J F Siqueira1
1Faculty of Dentistry, Department of Endodontics, Estácio de Sá University, Rio de Janeiro, Brazil.
International Endodontic Journal
|October 5, 2018
Summary
Untreated root canals in filled teeth significantly increase the risk of apical periodontitis. This study found that 12% of root-filled teeth had missed canals, leading to a much higher prevalence of this condition.
Area of Science:
- Endodontics
- Oral Radiology
- Dental Public Health
Background:
- Root canal treatment aims to eliminate intraradicular infection and prevent periapical disease.
- Missed canals during root canal therapy are a common cause of treatment failure.
- Apical periodontitis, an inflammation of the apex, can result from persistent or secondary intraradicular infection.
Purpose of the Study:
- To determine the frequency of post-treatment apical periodontitis in root-filled teeth with untreated canals.
- To assess the association and risk between missed root canals and apical periodontitis.
Main Methods:
- Cone beam computed tomography (CBCT) scans of 807 patients with root-filled teeth were analyzed.
- Teeth were examined for the presence of missed canals and apical periodontitis.
- Statistical analyses, including chi-square and odds ratio tests, were performed.
Main Results:
- 12% of root-filled teeth (281/2294) had at least one untreated missed canal.
- Teeth with untreated canals showed a significantly higher prevalence of apical periodontitis (98% vs. 86%).
- The odds of apical periodontitis were 6.25 times greater in teeth with missed canals.
Conclusions:
- Root-filled teeth with missed canals have a high prevalence of post-treatment apical periodontitis.
- Thorough root canal treatment, including identification of all canals, is crucial for preventing apical periodontitis.
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