Longitudinal Endodontic Study of Apical Preparation Size

Study Overview
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Brief Summary
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This protocol is for a clinical trial evaluating the clinical success of root canal therapy performed on teeth with chronic apical periodontitis of pulpal origin with either large or small apical root canal preparation techniques.

Detailed Description
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This randomized clinical trial will compare the clinical success of two commonly used techniques for performing non-surgical endodontic procedures on teeth with chronic apical periodontitis of pulpal origin. The first method, termed the GT method uses a commercially available rotary file system to instrument the root canal systems from the crown to the apical portion of the root. After completion of this technique, the apical portion of the root is prepared to the same standardized ISO size #20 in all roots (i.e., 0.2 mm cross-sectional diameter). The second method, termed the Lightspeed method uses a different commercially available rotary file system to shape the root canal systems from the apical to the crown portion of the root. After completion of this technique, the apical preparation is often larger in cross-sectional diameter than that observed after the GT method; however, an equally important distinction is that the Lightspeed method customizes the final cross-sectional diameter for each root canal system, and thus each root has a similar enlargement of apical preparation size due to proportionate removal of infected dentin at the end of the root. Although the Lightspeed method may result in reduced bacteria in the apical portion of root canal systems, there is no evidence to date that this effect improves clinical success rates. This study will test the hypothesis that the larger apical preparation size produced by the Lightspeed instrumentation system will produce a higher percentage of clinically successful treatments of teeth with apical periodontitis (AP) as compared to the GT method

Official Title
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Longitudinal Endodontic Study of Apical Preparation Size

Conditions
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Chronic Apical Periodontitis of Pulpal Origin

Intervention / Treatment
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* Procedure: Endodontic procedure with varied apical preparation size


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient must be at least 18 years of age. Clinical indication for Non-Surgical Root Canal Therapy (NSRCT). 1st or 2nd maxillary or mandibular molar. Diagnosis must be Chronic Apical Periodontitis (CAP) with or without symptoms. Intact, mature apices. ASA I or II. Exclusion Criteria: Failure to meet any of the above Previous NSRCT Previous pulpotomy or pulpectomy

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Intervention/Treatment |
| --- |
|Procedure: Endodontic procedure with varied apical preparation size|Comparison of two commonly used techniques for performing root canal treatment: 1) Lightspeed method 2)Buchannan method|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Radiographic and clinical evidence of osseous healing of chronic apical periodontitis of pulpal origin. |  | 2 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pain |  | 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Apical Periodontitis, Root Canal Therapy, Apical Preparation