Longitudinal Endodontic Study of Apical Preparation Size
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ClinicalTrials.gov Identifier: NCT00223379
Recruitment Status :
First Posted : September 22, 2005
Last Update Posted : March 8, 2012
The University of Texas Health Science Center at San Antonio
Information provided by (Responsible Party):
Kenneth Hargreaves, The University of Texas Health Science Center at San Antonio
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.
Condition or disease
Chronic Apical Periodontitis of Pulpal Origin
Procedure: Endodontic procedure with varied apical preparation size
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
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Layout table for eligibility information
Ages Eligible for Study:
18 Years to 70 Years (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
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.