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Further Treatments of Root-filled Teeth in the Swedish Adult Population: A Comparison of Teeth Restored with Direct and Indirect Coronal Restorations

Journal article
Authors V. S. Dawson
P. E. Isberg
Thomas Kvist
H. Fransson
EndoReCo, EndoReCo,
Published in Journal of Endodontics
Volume 43
Issue 9
Pages 1428-1432
ISSN 0099-2399
Publication year 2017
Published at Institute of Odontology
Pages 1428-1432
Language en
Keywords Apicoectomy, endodontics, epidemiology, permanent dental restoration, root canal therapy, tooth extraction, endodontically treated teeth, canal treatment, tooth survival, outcomes, composite, practitioners, retreatment, taiwan, Dentistry, Oral Surgery & Medicine
Subject categories Dentistry


Introduction: The aim of this study was to evaluate the frequencies of nonsurgical retreatment, root -end surgery, extraction, and further restoration of root -filled teeth in Sweden in 2009 during a follow-up period of 5 years and to compare the outcomes in teeth restored with direct or indirect restorations. Methods: Data from the Swedish Social Insurance Agency were analyzed, and the frequencies of nonsurgical retreatment, root end surgery, extractions, and further restoration were calculated for all teeth registered as root filled during 2009. Chi-square tests were applied to detect any significant differences in the frequency of further treatment in teeth registered as restored with either a direct or an indirect restoration within 6 months of root filling. Results: Of the 248,299 teeth reported root filled in Sweden in 2009, nonsurgical retreatment was registered in 2.2%, root -end surgery in 1.0%, and extractions in 9.2% during the follow-up period. Of the teeth restored with a direct restoration within 6 months after the root filling, 30.3% were registered as having undergone at least 1 further direct restoration; the corresponding percentage of teeth with indirect restorations was 6.4%. A statistically significant difference in the frequency of nonsurgical retreatment, extraction, and further restoration was found; teeth restored with an indirect restoration within 6 months of root filling had fewer of these treatments than those restored by direct restoration. Conclusions: Low frequencies of nonsurgical retreatment and root -end surgery were reported 5 years after root filling, whereas extraction was more common. Fewer additional treatment procedures were registered for teeth with indirect restorations than for those with direct restorations.

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