Tooth mortality and endodontic status of a selected population group. Observations before and after treatment.

Tooth mortality and the frequency and distribution of endodontically treated teeth was studied in a Norwegian population group. The pre- and posttreatment situation was thus surveyed in 481 individuals with endodontic treatment. The middle aged and the female patients were overrepresented in the sample. At admittance the mean number of teeth per patient was 22.8, 2.6 of which had been endodontically treated. After comprehensive dental treatment, the corresponding figures were 21.5 and 3.7. During treatment extractions were performed in 48% of the patients, twice as often in the maxilla as in the mandible, 47% of the extracted teeth being molars. At admittance, root fillings comprised 83.5% of the total number of endodontically treated teeth, while pulpotomies were observed in about 15%. Retreatments were performed in 35% of the treated roots and in every other patients.