This Study Compares the Effects of Two Working Length Methods on Postoperative Pain in Single-rooted, Single-canal Teeth During Root Canal RetreatmentNCT06732063
Evaluation of Postoperative Pain After Endodontic Retreatment Using Different Working Length Determination Methods: A Randomized Clinical Trial
A study testing endodontic retreatment in people with This Study Compares the Effects of Two Working Length Methods on Postoperative Pain in Single-rooted, Single-canal Teeth During Root Canal Retreatment, run by öznur dişli at 1 site in Turkey (Türkiye).
Trial summary
The aim of this study is to compare the effects of two different working length determination methods on the incidence of postoperative pain in single-rooted, single-canal teeth undergoing root canal retreatment (RCR). Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- This Study Compares the Effects of Two Working Length Methods on Postoperative Pain in Single-rooted, Single-canal Teeth During Root Canal Retreatment
- What is being tested?
- endodontic retreatment
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 64 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 13 Nov 2023to 1 Dec 2024
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Healthy volunteers aged between 18 and 65 with no systemic diseases. Teeth without acute apical abscess. Single-rooted and single-canal teeth that have previously undergone root canal treatment, failed, and require re-treatment (diagnosed based on clinical symptoms and radiographic findings).
- Individuals with preoperative pain rated 50 or lower on the 100 mm VAS scale
Who cannot join
- Individuals with systemic diseases or allergic reactions. Pregnancy and breastfeeding. Teeth with open apex. Teeth with internal or external root resorption. Patients who have taken analgesic, anti-inflammatory, or antibiotic medications within the last twelve hours.
- Teeth with broken instruments in the canal. Individuals with bruxism problems.
Trial locations and contacts
1 site in 1 country.
About this study
The aim of this study is to compare the effects of two different working length determination methods on the incidence of postoperative pain in single-rooted, single-canal teeth undergoing root canal retreatment (RCR). Sixty-four previously treated, single-rooted, single-canal teeth, which were determined to require RCR based on clinical symptoms and radiographic findings, were randomly and equally divided into two groups and included in the study. Two distinct working mechanisms of an integrated endodontic motor with an apex locator were used in our study. One method involved simultaneous determination of the working length during canal shaping, while the other method determined the working length with a hand file after the canal filling was removed. After the session in which the methods were applied and the working length was determined, participants' pain levels were recorded using a visual analog scale (VAS) at 6-12 hours and on days 1-2-3-4-5-6-7.
- Being tested
- endodontic retreatment
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
endodontic retreatmentDevice
Re-treatment of previously failed root canal treatments
| Study group | Role | What they receive |
|---|---|---|
| Separate length determination method | Other | Not described Receives: Device: endodontic retreatment |
| Simultaneous length determination method | Other | Not described Receives: Device: endodontic retreatment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Evaluation of different working length measurement methods in endodontic treatment and postoperative pain.
For the purpose of evaluating postoperative pain, the difference between two different working length measurement methods used during endodontic retreatment was analyzed. Postoperative pain was measured by visual analog scale (VAS) scores of the patients during the first 7 days after the procedure.
Measured: 7 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Dec 2024
- Study start13 Nov 2023
- Primary completion1 Sep 2024
- Study completion1 Dec 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for This Study Compares the Effects of Two Working Length Methods on Postoperative Pain in Single-rooted, Single-canal Teeth During Root Canal RetreatmentStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 64 participants (actual)
Sponsor and investigators
- Lead sponsor
- öznur dişli
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, öznur dişli, TC Erciyes University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06732063
- Sponsor's protocol ID
- 2023/428
- Status last verified
- Oct 2026
- First submitted
- 10 Dec 2024
- Last updated
- 21 Oct 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 21 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Postoperative Pain After Endodontic Retreatment Using Different Working Length Determination Methods: A Randomized Clinical Trial
- ClinicalTrials.gov ID
- NCT06732063
- Acronym / sponsor ID
- 2023/428
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 64 participants (actual)
- Lead sponsor
- öznur dişliUniversity, hospital or other
- Study start
- 13 Nov 2023 (actual)
- Primary completion
- 1 Sep 2024 (actual)
- Study completion
- 1 Dec 2024 (actual)
- First posted
- 13 Dec 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of this study is to compare the effects of two different working length determination methods on the incidence of postoperative pain in single-rooted, single-canal teeth undergoing root canal retreatment (RCR). Sixty-four previously treated, single-rooted, single-canal teeth, which were determined to require RCR based on clinical symptoms and radiographic findings, were randomly and equally divided into two groups and included in the study. Two distinct working mechanisms of an integrated endodontic motor with an apex locator were used in our study. One method involved simultaneous determination of the working length during canal shaping, while the other method determined the working length with a hand file after the canal filling was removed. After the session in which the methods were applied and the working length was determined, participants' pain levels were recorded using a visual analog scale (VAS) at 6-12 hours and on days 1-2-3-4-5-6-7.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Separate length determination method | Other | Device: endodontic retreatment |
| Simultaneous length determination method | Other | Device: endodontic retreatment |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Healthy volunteers aged between 18 and 65 with no systemic diseases. Teeth without acute apical abscess. Single-rooted and single-canal teeth that have previously undergone root canal treatment, failed, and require re-treatment (diagnosed based on clinical symptoms and radiographic findings).
- Individuals with preoperative pain rated 50 or lower on the 100 mm VAS scale
Key exclusion criteria (2 listed)
- Individuals with systemic diseases or allergic reactions. Pregnancy and breastfeeding. Teeth with open apex. Teeth with internal or external root resorption. Patients who have taken analgesic, anti-inflammatory, or antibiotic medications within the last twelve hours.
- Teeth with broken instruments in the canal. Individuals with bruxism problems.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| endodontic retreatmentRe-treatment of previously failed root canal treatments | Device | Separate length determination method, Simultaneous length determination method |
Primary outcome
Evaluation of different working length measurement methods in endodontic treatment and postoperative pain.
Time frame: 7 days
For the purpose of evaluating postoperative pain, the difference between two different working length measurement methods used during endodontic retreatment was analyzed. Postoperative pain was measured by visual analog scale (VAS) scores of the patients during the first 7 days after the procedure.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Oct 2026.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing endodontic retreatment in people with This Study Compares the Effects of Two Working Length Methods on Postoperative Pain in Single-rooted, Single-canal Teeth During Root Canal Retreatment, run by öznur dişli at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 21 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Evaluation of different working length measurement methods in endodontic treatment and postoperative pain. (time frame: 7 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Oct 2026.