[Table/Fig-10]:
Co-relation data.
| Co-relation between initial enlargement and file re use, Chi square value(df)= 10.64(6), p=0.10(NS) | |||||||
|---|---|---|---|---|---|---|---|
| Initial enlargement | Re-uses | Total | |||||
| 1 - 5 | 6 - 10 | more than 10 | |||||
| 15 no. K file | 45 (26.2%) | 120 (69.8%) | 7 (4.1%) | 172 | |||
| 20 no. K file | 69 (19.2%) | 276 (76.9%) | 14 (3.9%) | 359 | |||
| 25 no. K file | 16 (34.8%) | 27 (58.7%) | 3 (6.5%) | 46 | |||
| Depends on the canal | 10 (16.4%) | 47 (77.0%) | 4 (6.6%) | 61 | |||
| Total | 140 (21.9%) | 470 (73.7%) | 28 (4.4%) | 638(100.0%) | |||
| Co-relation between biomechanical preparation technique and file separation, Fisher’s exact test = 0.01* | |||||||
| Preparation technique | File separation | Total | |||||
| After 1 - 5 | After 6 - 10 | After more than 10 | |||||
| Crown down technique | 86 (24.9%) | 246 (71.1%) | 14 (4.0%) | 346 | |||
| Hybrid preparation technique | 46 (17.4%) | 208 (78.8%) | 10 (3.8%) | 264 | |||
| Sequential manner | 7 (25.9%) | 16 (59.3%) | 4 (14.8%) | 27 | |||
| Step back | 1 (100.0%) | 0 | 0 | 1 | |||
| Total | 140 (21.9%) | 470 (73.7%) | 28 (4.4%) | 638 (100.0%) | |||
| Co-relation between years of clinical experience with rotary files and file separation, Chi square value(df)= 29.34(6), p<0.001* | |||||||
| Years | File separation | Total | |||||
| After 1 - 5 times | After 6 - 10 times | After more than 10 times | |||||
| 1 year to 5 years | 36 (15.7%) | 181 (79.0%) | 12 (5.2%) | 229 | |||
| 6 months to 1 year | 44 (31.0%) | 89 (62.7%) | 9 (6.3%) | 142 | |||
| Less than 6 months | 31 (35.2%) | 54 (61.4%) | 3 (3.4%) | 88 | |||
| More than 5 years | 29 (16.2%) | 146 (81.6%) | 4 (2.2%) | 179 | |||
| Total | 140 (21.9%) | 470 (73.7%) | 28 (4.4%) | 638 | |||
| Co-relation between years of clinical experience with rotary files and method of management of separated instrument | |||||||
| Years | Total | Chi square test | |||||
| 1 year to 5 years | 6 months to 1 year | Less than 6 months | More than 5 years | Chi square value | p-value | ||
| Retrieve the instrument | 84 (36.7%) | 33 (23.2%) | 24 (27.3%) | 122 (68.2%) | 263 (41.2%) | 81.56 | <0.001* |
| Bypass the separated instrument | 182 (79.5%) | 109 (76.8%) | 67 (76.1%) | 160 (89.4%) | 518 (81.2%) | 11.61 | 0.009* |
| Obturation over the separated instrument | 141 (61.6%) | 86 (60.6%) | 33 (37.5%) | 91 (50.8%) | 351 (55.0%) | 17.92 | <0.001* |
| Others | 2 (0.8%) | 1 (0.7%) | 0 | 2 1.2%) | 5 (0.8%) | - | - |
*
p<0.05 statistically significant; p>0.05 Non significant, NS
Fishers Exact test and Chi square test used.