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Apical Size and Root Canal Treatment Success Trial (AS-RCT Trial)
NCT03053037 · View on ClinicalTrials.gov ↗
Study Summary
This study is looking into two different ways to perform a root canal treatment. The study will look at differences and compare the two different treatment options over a 2-year period.More specifically, this study evaluates a small "skinny" root canal shape compared to a larger "broad" root canal shape and if this affects the success of the root canal treatment. Both types of treatment are standard of care and aim to treat the infection inside your tooth. When a tooth is infected with bacteria, we can see a dark area on the radiograph around the roots of the infected tooth. If this dark area becomes smaller or goes away completely after root canal treatment and you do not feel any pain or other symptoms, then we know that the treatment was successful and there is no need for further treatment on this tooth. To measure the size of the dark area around the tooth (i.e. volume) before and after the treatment we will need to take two limited volume three-dimensional radiographs (cone beam computed tomography-CBCT), one prior to treatment and one at two years after the root canal treatment is completed. These radiographs are more accurate in detecting changes in lesion size than the regular periapical radiographs. We will assess the changes in lesion volume for all teeth included in the study and that will help us find differences in success between the two root canal treatment protocols, We are specifically looking for persons that have been diagnosed with a necrotic permanent mandibular molar with an evident radiographic lesion (i.e. dark area around the tooth) that can be retained in the mouth with root canal treatment and permanent restoration. This study place participants in different treatment groups after randomization. Randomization means that you are placed by chance (like flipping a coin) into a treatment group. For this study, there are two treatment groups (protocol) and they are listed below. Protocol 1: Group S: Root canal treatment will be performed in 2
Conditions Studied
Interventions
- PROCEDURE final apical size instrumentation
Study Locations (2)
Texas
- University of Texas Health Science Center — San Antonio
Washington
- University of Washington Dental School — Seattle
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 35 participants |
| Start Date | 2016-08-05 |
| Est. Completion | 2022-02-07 |
| Phase | NA |
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Full Details on ClinicalTrials.gov ↗What the Registry Record Tells You About NCT03053037
The ClinicalTrials.gov registry entry for NCT03053037 describes a study currently listed as completed. It is categorized as NA, which is the standard way researchers label where a study sits along the investigational pathway from early safety work through later efficacy and post-marketing evaluation. The registered enrollment target is 35 participants, a figure that helps gauge the scale of data the investigators plan to collect. The listed sponsor is University of Washington, which has 987 total studies on file at ClinicalTrials.gov, and sponsors are the parties responsible for study design, oversight, and regulatory filings.
The record links to 1 condition, with Root Canal Therapy appearing as the primary indexed condition, and to 1 intervention — of which final apical size instrumentation is the first listed. Interventions can include drugs, devices, procedures, behavioral programs, or observational arms, and each is tracked as a separate registry field so that downstream queries can filter accurately. When a trial lists multiple interventions, it usually reflects a multi-arm design or a comparison protocol rather than a single treatment being tested in isolation. The brief summary published in the registry is the clearest source of protocol intent and should be read before drawing conclusions from any sidebar tags.
Geographic footprint matters for practical reasons: NCT03053037 reports 2 study locations spanning 2 distinct geographic areas — top geographies include Texas, Washington. A larger site network tends to correlate with broader recruitment capacity, but it does not imply anything about study quality, and site-level enrollment status can diverge from the overall registry status shown above. Every data point on this page comes from the public ClinicalTrials.gov dataset and is reproduced here for reference only; it is not a medical recommendation, an endorsement of the sponsor, or an invitation to enroll. Verify current status, eligibility criteria, and contact details directly at ClinicalTrials.gov, and discuss any participation decision with your own healthcare provider.
Frequently Asked Questions
What is clinical trial NCT03053037 about?
NCT03053037 is a clinical study titled "Apical Size and Root Canal Treatment Success Trial (AS-RCT Trial)". This study is looking into two different ways to perform a root canal treatment. The study will look at differences and compare the two different treatment options over a 2-year period.More specifically, this study evaluates a small "skinny" root canal shape compared to a larger "broad" root canal s...
What is the current status of trial NCT03053037?
This trial is currently completed. It is a NA study. The enrollment target is 35 participants. The study started on 2016-08-05. Estimated completion is 2022-02-07.
What conditions does trial NCT03053037 study?
This clinical trial studies the following conditions: Root Canal Therapy. These conditions were identified from the trial registry and reflect the primary focus areas of the research.
What interventions are being tested in trial NCT03053037?
The interventions under investigation include: final apical size instrumentation (PROCEDURE). Each intervention is being evaluated for safety and efficacy as part of this clinical study.
Who is sponsoring clinical trial NCT03053037?
This trial is sponsored by University of Washington, which has 987 total clinical trials registered on ClinicalTrials.gov. The sponsor is responsible for the study's design, funding, and regulatory compliance.
Where is trial NCT03053037 being conducted?
This trial has 2 study locations across Texas, Washington. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
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