Treatment Durations for Endodontic Procedures

The aim of this observational study is to compare the treatment durations of different stages of routine root canal therapy performed on maxillary molar teeth using direct vision, magnification loupes, and a dental operating microscope.

The primary question the study seeks to answer is whether there is a significant difference in the duration of endodontic procedures performed under different magnification techniques.

Patients indicated for root canal treatment in their maxillary first molar teeth will receive standard root canal therapy in accordance with routine clinical protocols. The duration of each procedural step will be recorded and subsequently compared among the three magnification methods.

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Key information

Conditions

Root Canal Therapy

Age range

12 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Uşak University Faculty of Dentistry, Department of Endodontics

Uşak, 64000, Turkey (Türkiye)

About this study

In this observational study, routine root canal treatment procedures will be performed in accordance with standard endodontic protocols on patients who applied to the Department of Endodontics, Faculty of Dentistry, Uşak University, and were indicated for root canal treatment on their maxillary first molar teeth.

The treatment procedures consist of seven main stages:
Preparation of the access cavity
Determination of the working length
Shaping of the root canals
Detection and shaping of the MB2 canal
Final irrigation and passive ultrasonic activation
Root canal filling

Application of the coronal restoration

All steps will be carried out according to standard clinical endodontic protocols under rubber dam isolation. The duration of each stage will be recorded individually.

Participants will be divided into three groups based on the magnification technique used during treatment:

Group 1: Treatments performed under direct vision

Group 2: Treatments performed using dental loupes

Group 3: Treatments performed using a dental operating microscope

All procedures in each group will follow the same standardized root canal treatment protocol, differing only in the magnification technique employed.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Patients requiring root canal treatment of the maxillary first molar tooth

Exclusion criteria

Previous root canal treatment on the maxillary first molar tooth
Presence of fracture or crack in the maxillary first molar tooth
Lack of indication for completing treatment in a single session
Patient refusal to continue treatment during the procedure
Indication for extraction due to complications during treatment
Teeth indicated for fiber post restoration due to excessive material loss

Treatment and study plan

Primary outcomes

Duration of each procedural step in endodontic treatment

Time frame: 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:
- Access cavity preparation
- Working length determination
- Canal shaping
- MB2 canal detection and shaping
- Final irrigation and passive ultrasonic activation
- Root canal filling
- Coronal restoration
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.

Secondary outcomes

Presence of MB2 canal according to magnification technique

Time frame: 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).

Sponsors and collaborators

Lead sponsor

Uşak University

Other

Registry information

Official study title

Comparison of Treatment Durations for Endodontic Procedures on Maxillary Molar Teeth Using Different Magnification Techniques

Important dates

Study start: 2025
Primary completion: 2025
Study completion: 2025
First posted: Dec 26, 2025
Registry last updated: Dec 26, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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