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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’ ClassificationNumber of fractured NiTi-RIs (%)Total
1–2 files3–5 files6–10 filesMore than 10 files
General Dentists24 (20)36 (30)33 (27.5)27 (22.5)120 (100)
Endodontists16 (16.2)17 (17.2)14 (14.1)52 (52.5)99 (100)
Others2 (20)4 (40)4 (40)0 (0)10 (100)
Total42 (18.3)57 (24.9)51 (22.3)79 (34.5)229 (100)
Respondents’ ExperienceNumber of fractured NiTi-RIs (%)Total
1–2 files3–5 files6–10 filesMore than 10 files
Up to 3 Years0 (0)11 (61.1)4 (22.2)3 (16.7)18 (100)
3.1 to 7 Years16 (25.4)22 (34.9)14 (22.2)11 (17.5)63 (100)
7.1 to 15 Years15 (18.3)6 (7.3)23 (28)38 (46.3)82 (100)
More Than 15 Years11 (16.7)18 (27.3)10 (15.2)27 (40.9)66 (100)
Total42 (18.3)57 (24.9)51 (22.3)79 (34.5)229 (100)
Weekly Performed RCTsNumber of fractured NiTi-RIs (%)Total
1–2 files3–5 files6–10 filesMore than 10 files
1–3 cases9 (33.3)8 (29.6)4 (14.8)6 (22.2)27 (100)
4–6 cases15 (24.6)23 (37.7)16 (26.2)7 (11.5)61 (100)
7–12 cases8 (8.3)22 (22.9)27 (28.1)39 (40.6)96 (100)
More than 12 cases10 (22.2)4 (8.9)4 (8.9)27 (60)45 (100)
Total42 (18.3)57 (24.9)51 (22.3)79 (34.5)229 (100)
Number of fractured instrumentsDuration of Using NiTi-RIs (%)Total
1–2 files3–5 file6–10 filesMore than 10 filesTotal
Up to I month3 (100)0 (0)0 (0)0 (0)3 (100)
6 months1 (100)0 (0)0 (0)0 (0)1 (100)
One year9 (33.3)9 (33.3)3 (11.1)6 (22.2)27 (100)
3 years18 (37.5)15 (31.3)9 (18.8)6 (12.5)48 (100)
More than 3 years11 (7.3)33 (22)39 (26)67 (44.7)150 (100)
Total42 (18.3)57 (24.9)51 (22.3)79 (34.5)229 (100)