Survival of Root-filled Teeth in Relation to Restoration and Tooth-group

• Objectives: To compare the survival of teeth root-filled in Sweden in 2009 in relation to type of restoration and tooth-group.Methods: The database at the Swedish Social Insurance Agency containing information on treatments was used to identify all teeth in Sweden that were root-filled during 2009, by searching for the treatment codes corresponding to root-filling. The completed root-fillings could be linked to a specific tooth in a specific individual. Teeth registered as restored with a direct or indirect restoration within 6 months after completion of the root-filling were tagged and tracked until December 31st 2014. During this period, the treatment codes for extraction were registered for the identified root-filled teeth in order to construct Kaplan-Meier tooth survival analyses.Results: 248,299 teeth were registered as root-filled in Sweden in the year 2009. Of these 142,264 (57.3%) were restored with a direct restoration and 64,092 (25.8%) with an indirect restoration. Survival analysis disclosed that 5-6 years after root canal treatment 93.1% of the teeth with an indirect restoration had survived and 89.6% of the teeth with a direct restoration had survived. In the total material, irrespectively to any coronal restoration, premolars and upper anterior teeth had the highest survival (93.0% respectively 91.4%) and molars the lowest survival (87.6%). The same pattern was observed in sub-group analysis in the group of root-filled teeth with direct restorations. In the group with root-filled teeth with indirect restorations another pattern was observed; upper anterior teeth (92.6%) had a relatively lower survival, equivalent to those of molar teeth (92.6%).Conclusions: 5-6 year survival of root-filled teeth in Sweden were higher in the group with indirect restorations compared to the group with direct restoration. Root-filled upper incisors had an overall high survival, though for root-filled upper anterior teeth with indirect restorations the survival was relatively low.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Odontologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Dentistry (hsv//eng)

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