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Table 5 Frequency of factors associated with the number of fractured NiTi-RIs (%)”

From: Factors influencing incidents of complications while using nickel-titanium rotary instruments for root canal treatment

Respondents’ Classification

Number of fractured NiTi-RIs (%)

Total

1–2 files

3–5 files

6–10 files

More than 10 files

General Dentists

24 (20)

36 (30)

33 (27.5)

27 (22.5)

120 (100)

Endodontists

16 (16.2)

17 (17.2)

14 (14.1)

52 (52.5)

99 (100)

Others

2 (20)

4 (40)

4 (40)

0 (0)

10 (100)

Total

42 (18.3)

57 (24.9)

51 (22.3)

79 (34.5)

229 (100)

Respondents’ Experience

Number of fractured NiTi-RIs (%)

Total

1–2 files

3–5 files

6–10 files

More than 10 files

Up to 3 Years

0 (0)

11 (61.1)

4 (22.2)

3 (16.7)

18 (100)

3.1 to 7 Years

16 (25.4)

22 (34.9)

14 (22.2)

11 (17.5)

63 (100)

7.1 to 15 Years

15 (18.3)

6 (7.3)

23 (28)

38 (46.3)

82 (100)

More Than 15 Years

11 (16.7)

18 (27.3)

10 (15.2)

27 (40.9)

66 (100)

Total

42 (18.3)

57 (24.9)

51 (22.3)

79 (34.5)

229 (100)

Weekly Performed RCTs

Number of fractured NiTi-RIs (%)

Total

1–2 files

3–5 files

6–10 files

More than 10 files

1–3 cases

9 (33.3)

8 (29.6)

4 (14.8)

6 (22.2)

27 (100)

4–6 cases

15 (24.6)

23 (37.7)

16 (26.2)

7 (11.5)

61 (100)

7–12 cases

8 (8.3)

22 (22.9)

27 (28.1)

39 (40.6)

96 (100)

More than 12 cases

10 (22.2)

4 (8.9)

4 (8.9)

27 (60)

45 (100)

Total

42 (18.3)

57 (24.9)

51 (22.3)

79 (34.5)

229 (100)

Number of fractured instruments

Duration of Using NiTi-RIs (%)

Total

1–2 files

3–5 file

6–10 files

More than 10 files

Total

Up to I month

3 (100)

0 (0)

0 (0)

0 (0)

3 (100)

6 months

1 (100)

0 (0)

0 (0)

0 (0)

1 (100)

One year

9 (33.3)

9 (33.3)

3 (11.1)

6 (22.2)

27 (100)

3 years

18 (37.5)

15 (31.3)

9 (18.8)

6 (12.5)

48 (100)

More than 3 years

11 (7.3)

33 (22)

39 (26)

67 (44.7)

150 (100)

Total

42 (18.3)

57 (24.9)

51 (22.3)

79 (34.5)

229 (100)