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Factors Associated with Extraction following Root Canal Filling in Adults
H Fransson1,2, L Bjørndal3, F Frisk2,4
1Department of Endodontics, Malmö University, Malmö, Sweden.
Journal of Dental Research
|January 6, 2021
Summary
Root-filled teeth in Sweden have a 9.3% extraction rate within five years. Tooth restoration type significantly impacts extraction risk, with direct restorations and composite materials showing higher odds of extraction compared to indirect restorations.
Area of Science:
- Dental Public Health
- Epidemiology
- Restorative Dentistry
Background:
- Root fillings aim to preserve natural teeth, but some eventually require extraction.
- Understanding factors influencing extraction of root-filled teeth is crucial for improving long-term outcomes.
Purpose of the Study:
- To identify individual and tooth-specific factors associated with the extraction of root-filled teeth within five years.
- To analyze the impact of different restoration types on the survival of root-filled teeth.
Main Methods:
- A historical prospective cohort study using data from the Swedish Social Insurance Agency (SSIA) and Statistics Sweden.
- Inclusion of 216,764 individuals with root fillings registered in 2009.
- Multivariable logistic regression analysis to identify significant predictors of extraction.
Main Results:
- 9.3% of root-filled teeth were extracted within five years.
- Teeth with no restoration or direct restorations with posts had significantly higher extraction odds (OR=3) compared to indirect restorations with posts.
- Composite restorations, including fillings and crowns, were associated with increased extraction risk.
Conclusions:
- Several individual and tooth-specific factors, particularly restoration type, are associated with the extraction of root-filled teeth.
- The findings highlight the importance of restoration choice in the long-term prognosis of root-filled teeth.
- Further research is needed to elucidate the specific reasons behind these extractions.
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