From: Factors that cause endodontic failures in general practices in Japan
Factors | No. of Teeth | Percentage of Total | No. of cases using CBCT |
---|---|---|---|
Apicoectomy | Â | Â | Â |
 Open apices | 3 | 50 | 0 |
 Fenestration | 1 | 16.7 | 0 |
 Accessory canal | 1 | 16.7 | 1 |
 Transportation | 1 | 16.7 | 1 |
 Total | 6 | 100 | 2 |
Tooth extractions | Â | Â | Â |
 Perforation | 8 | 44.4 | 1 |
 Root fracture | 7 | 38.9 | 3 |
 Open apices | 3 | 22.2 | 1 |
 Inaccessible root apex | 1 | 5.6 | 1 |
 Separated instruments | 1 | 5.6 | 1 |
 Endo-perio | 1 | 5.6 | 0 |
 Total | 18 | 100 | 6 |