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Table 4 Comparison of knowledge and practice answers and agreement levels among a sample of Saudi dentists (n = 203)

From: Do dentists practice what they know? A cross-sectional study on the agreement between dentists' knowledge and practice in restoring endodontically treated teeth

Aspects Knowledge answers Practice answers Agreement* level
Technical management of ETT n (%) n (%)
1. The best clinician to prepare the post space?    0.306
The clinician who performed the root canal treatment 109 (53.7) 45 (22.2) Minimal
The clinician who will fabricate the post 69 (34.0) 124 (61.1) p < 0.001
Anyone, they are both equally qualified 25 (12.3) 34 (16.7)  
2. Routine placement rubber dam during post space preparation?    0.192
Yes 135 (66.5) 49 (24.1) None
No 68 (33.5) 154 (75.9) p < 0.001
3. Recommended post space preparation technique?    0.521
Rotary instruments (Gates Glidden, Peeso Reamers) 129 (63.9) 156 (77.2) Weak
Post drills only 34 (16.8) 28 (13.9) p < 0.001
Heated endodontic instruments 21 (10.4) 7 (3.5)  
Other (Chemical Solvents and others) 18 (8.9) 11 (5.4)  
4. Minimum acceptable amount of gutta-percha remaining in the prepared canal?    0.176
 ≤ 3 mm 101 (49.8) 20 (9.9) None
4–5 mm 96 (47.3) 166 (81.8) p < 0.001
More than 5 mm 6 (3.0) 17 (8.4)  
5. Acceptable gap, if any, between the gutta-percha and the post?    0.344
No gap between the gutta-percha and the post 81 (39.9) 83 (40.9) Minimal
A gap of 0 to 2 mm 114 (56.1) 112 (55.2) p < 0.001
A gap of > 2 mm or presence of a gap does not matter 8 (3.9) 8 (3.9)  
Time-related aspects
6. Time from obturation to start preparing the post space?    0.438
Immediately after obturation 30 (14.8) 60 (29.6%) Weak
1–7 days after obturation 118 (58.1) 78 (38.4%) p < 0.001
2–4 weeks after obturation 30 (14.8) 29 (14.3%)  
More than a month after obturation or duration of time is irrelevant 25 (12.3) 36 (17.7%)  
7. Time of PSP in presence of periapical lesion    0.804
Immediately after RCT 32 (15.8) 31 (15.3) Strong
One week after RCT 29 (14.3) 33 (16.3) p < 0.001
6 months after RCT 28 (13.8) 29 (14.3)  
Until there is evidence of periapical healing 114 (56.2) 110 (54.2)  
8. Acceptable time from PSP until cementing the indirect post and core?    0.128
Less than 1 week 79 (42.2) 42 (22.5) None
1 week 66 (35.3) 78 (41.7) p = 0.003
2 weeks 38(20.3) 40 (21.4)  
More than 2 weeks 4 (2.1) 27 (14.4)  
9. Acceptable duration from post cementation until cementation of the final crown?    0.301
Less than one week 44 (23.7) 25 (13.4) Minimal
From 1–2 weeks 89 (47.8) 80 (43.0) p < 0.001
From 2–4 weeks 42 (22.6) 58 (31.2)  
More than one month 11 (5.9) 23 (12.4)  
10. Placement of temporary crown over cemented post and core for coronal seal    0.156
Yes 152 (74.9) 165 (83.1) None
No 51 (25.1) 38 (18.7) p = 0.024
  1. PSP post space preparation, ETT:endodontically treated teeth, RCT root canal treatment
  2. *Agreement value measured by kappa statistics