Long-term Survival of Endodontically Treated Teeth at a Public Dental Specialist Clinic

By Landys Borén D, Jonasson P, Kvist T

Date: 02/2016
Journal: JOE


Purpose:  to evaluate the 10-year survival rate of root canal–treated teeth at this specialist clinic. and to identify possible preoperative, intra-operative, or postoperative prognostic factors associated with the outcome survival in this study.


• 330 patients with 420 teeth examined and treated at least 10 years previously and tooth survival was recorded by examine the records and by contacting referring dentists and patients.

•Inclusion criteria : patients were included into the study if they had at least 1 tooth treated at the clinic.

•Exclusion Criteria :  who after examination were recommended for extraction of the tooth involved, and patients who needed further referral but no endodontic treatment.

•One researcher  examined all included patient’s dental records and transferred preoperative, intraoperative, and postoperative registrations into an Excel data sheet

•23 dentists that provided the treatments in this study and  were all specialists, under specialist training, or general dentists with particular interest and skill in endodontics.

Most highlighted Results :

-10-year survival rate was 81.5%

Age and placement of a crown postoperatively  were factors found to have a statistically significant influence on survival rate

-Teeth that received a crown after treatment at this specialist clinic had an estimated 10-year survival rate of 91.3%  compared with teeth not restored with a crown 76%  thus, it was significantly lower.

-Tooth loos  during 10 years for teeth in patients <50 years old  is significantly lower than  patients above 50 years old §73 teeth (17.4%) in 69 patients had been extracted during the 10-year follow-up period. The reason for extraction was      related to endodontic diagnoses in only 5 of these cases (6.8%). The majority of extractions were carried out because          of root fracture (35.6%) and caries (21.9%) 

-Clinical significance :

 Placement of permanent restoration after RCT is advisable  in order to  improve the survival rate of tooth