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Table 3 Factors causing endodontic failures in cases needed apicoectomy and required tooth extractions and the number of cases using CBCT

From: Factors that cause endodontic failures in general practices in Japan

Factors

No. of Teeth

Percentage of Total

No. of cases using CBCT

Apicoectomy

   

 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

   

 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

  1. Several factors were identified in one tooth in cases required tooth extractions