Trial Outcomes & Findings for Treatment Durations for Endodontic Procedures (NCT NCT07304869)
NCT ID: NCT07304869
Last Updated: 2026-08-24
Results Overview
The duration (in seconds) of each of seven key procedural stages performed during routine root canal treatment on maxillary first molar teeth: 1. Access cavity preparation 2. Working length determination 3. Canal shaping 4. MB2 canal detection and shaping 5. Final irrigation and passive ultrasonic activation 6. Root canal obturation 7. Coronal Restoration The duration of each stage was recorded separately. In addition, the sum of the durations of these seven stages was recorded as the total treatment time. Each stage was timed separately for three groups (direct vision, dental loupes, and dental operating microscope) to compare the effect of different magnification techniques on working efficiency.
COMPLETED
102 participants
From the start of access cavity preparation to the completion of coronal restoration during a single treatment visit (approximately 35-120 minutes).
2026-08-24
Participant Flow
Participants were recruited from patients referred to the Department of Endodontics, Usak University Faculty of Dentistry, who required endodontic treatment on maxillary first molars.
Participants were randomly assigned to three groups based on the magnification technique used during treatment.
Participant milestones
| Measure |
Direct Vision
Endodontic treatment performed under direct vision without magnification.
|
Dental Loupe
Endodontic treatment performed using dental loupes with 5× magnification.
|
Dental Operating Microscope
Endodontic treatment performed using a dental operating microscope with 12.5× magnification.
|
|---|---|---|---|
|
Overall Study
STARTED
|
34
|
34
|
34
|
|
Overall Study
COMPLETED
|
34
|
34
|
34
|
|
Overall Study
NOT COMPLETED
|
0
|
0
|
0
|
Reasons for withdrawal
Withdrawal data not reported
Baseline Characteristics
Treatment Durations for Endodontic Procedures
Baseline characteristics by cohort
Baseline data not reported
PRIMARY outcome
Timeframe: From the start of access cavity preparation to the completion of coronal restoration during a single treatment visit (approximately 35-120 minutes).The duration (in seconds) of each of seven key procedural stages performed during routine root canal treatment on maxillary first molar teeth: 1. Access cavity preparation 2. Working length determination 3. Canal shaping 4. MB2 canal detection and shaping 5. Final irrigation and passive ultrasonic activation 6. Root canal obturation 7. Coronal Restoration The duration of each stage was recorded separately. In addition, the sum of the durations of these seven stages was recorded as the total treatment time. Each stage was timed separately for three groups (direct vision, dental loupes, and dental operating microscope) to compare the effect of different magnification techniques on working efficiency.
Outcome measures
| Measure |
Patients Treated Under Direct Vision
n=34 Participants
Root canal treatment of maxillary first molar teeth performed without magnification, using direct visual inspection only.
|
Patients Treated Using Dental Loupes
n=34 Participants
Root canal treatment of maxillary first molar teeth performed using 5× magnification dental loupes.
|
Patients Treated Using a Dental Operating Microscope
n=34 Participants
Root canal treatment of maxillary first molar teeth performed using a dental operating microscope at 8×-16× magnification.
|
|---|---|---|---|
|
Duration of Each Procedural Step in Endodontic Treatment
1. Access cavity preparation
|
186 seconds
Interval 93.0 to 417.0
|
287 seconds
Interval 131.0 to 572.0
|
489.5 seconds
Interval 302.0 to 1157.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
2. Working length determination
|
152 seconds
Interval 63.0 to 682.0
|
259 seconds
Interval 112.0 to 662.0
|
240 seconds
Interval 132.0 to 648.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
3. Canal shaping
|
483 seconds
Interval 235.0 to 900.0
|
570 seconds
Interval 259.0 to 1500.0
|
606.5 seconds
Interval 393.0 to 1153.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
4. MB2 canal detection and shaping
|
311 seconds
Interval 202.0 to 780.0
|
483.5 seconds
Interval 240.0 to 954.0
|
546 seconds
Interval 313.0 to 1200.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
5. Final irrigation and passive ultrasonic activation
|
590.5 seconds
Interval 350.0 to 840.0
|
644.5 seconds
Interval 507.0 to 1047.0
|
720 seconds
Interval 583.0 to 1080.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
6. Root canal obturation
|
420 seconds
Interval 103.0 to 600.0
|
580 seconds
Interval 345.0 to 1200.0
|
618.5 seconds
Interval 415.0 to 1500.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
7. Coronal Restoration
|
601.5 seconds
Interval 360.0 to 1980.0
|
900 seconds
Interval 418.0 to 3300.0
|
1394 seconds
Interval 396.0 to 3000.0
|
|
Duration of Each Procedural Step in Endodontic Treatment
Total treatment time
|
2767.5 seconds
Interval 2037.0 to 4830.0
|
3912.5 seconds
Interval 2716.0 to 7080.0
|
4751 seconds
Interval 3633.0 to 6840.0
|
SECONDARY outcome
Timeframe: Baseline (at the time of canal orifice identification)The presence or absence of a second mesiobuccal (MB2) canal in maxillary first molar teeth will be recorded for each magnification group (direct vision, dental loupes, and dental operating microscope). The association between the magnification method and MB2 canal detection will be evaluated using the Chi-square test (Monte Carlo simulation).
Outcome measures
| Measure |
Patients Treated Under Direct Vision
n=34 Participants
Root canal treatment of maxillary first molar teeth performed without magnification, using direct visual inspection only.
|
Patients Treated Using Dental Loupes
n=34 Participants
Root canal treatment of maxillary first molar teeth performed using 5× magnification dental loupes.
|
Patients Treated Using a Dental Operating Microscope
n=34 Participants
Root canal treatment of maxillary first molar teeth performed using a dental operating microscope at 8×-16× magnification.
|
|---|---|---|---|
|
Presence of MB2 Canal According to Magnification Technique
Second mesiobuccal canal absent
|
18 Participants
|
10 Participants
|
6 Participants
|
|
Presence of MB2 Canal According to Magnification Technique
second mesiobuccal canal present
|
16 Participants
|
24 Participants
|
28 Participants
|
Adverse Events
Patients Treated Under Direct Vision
Patients Treated Using Dental Loupes
Patients Treated Using a Dental Operating Microscope
Serious adverse events
Adverse event data not reported
Other adverse events
Adverse event data not reported
Additional Information
Tuğçe Nur Çağlar
Uşak Üniversitesi Diş Hekimliği Fakültesi
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place