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Table 7 Previous studies on periapical and endodontic conditions in the general population conducted after year 2000

From: Periapical and endodontic status among 65-year-old Oslo-citizens

Country

Author

Exam year

No. of individuals

No. of teeth

Age range

Comparable age group (n)

Individual level

Tooth level

AP/total (%)

RF/total (%)

AP/total (%)

Untreated AP/total (%)

RF/total (%)

RF with AP/RF (%)

Norway

Diep et al. (present study)

2019

450

11 484

65

45

66

3,2

0,9

6,6

35

Denmark

Razdan et al. (2022)

2009

398

10 668

20–64

60–64 (109)

68,8*

67,9*

5,5*

2,4*

5,6*

57,0*

Denmark

Kirkevang et al. (2012)

2008

360

9 350

30–72

53

59

4,2

5,8

42,9

Sweden

Virtanen et al. (2017)

2003

120

49–58

49–58

40,8*

60,8

Sweden

Frisk et al. (2008)

2003

491

12 433

20–70

24,8

Norway

Skudutyte et al. (2006)

2003

146

3 971

35

16

23

1,1

0,4

1,5

43

Finland

Huumonen et al. (2017)**

2001

5335

120 635

30–95

55–64 (929)

34*

67*

6,6

15,3

  1. AP apical periodontitis, RF root-filled
  2. *Results in comparable age group
  3. **Registered AP in panoramic radiographs and defined AP as the periodontal ligament being two times the normal width