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Placement accuracy of electrically conductive gutta-percha
1Department of Endodontics, College of Dentistry, University of Iowa, Iowa City.
Journal of Endodontics
|July 1, 1994
Summary
Conductive gutta-percha master cones (CGPMCs) show variable accuracy when used with electronic apex locators. Radiographs often inaccurately suggested correct placement, highlighting the need for careful evaluation of CGPMC accuracy in endodontic procedures.
Area of Science:
- Endodontics
- Dental Materials Science
- Radiology
Background:
- Conductive gutta-percha master cones (CGPMCs) with silver film are designed for electronic apex locator (EAL) use.
- Accurate working length (WL) determination is crucial for successful endodontic treatment.
Purpose of the Study:
- To evaluate the accuracy of CGPMCs when placed at the electronic working length (WL) determined by an EAL.
- To compare EAL-determined CGPMC placement with radiographic findings.
Main Methods:
- Thirty extracted anterior teeth with mature apices were used in an in vitro system.
- Canals were prepared using the step-back technique.
- CGPMCs were seated to the EAL-determined WL, and radiographs were taken.
Main Results:
- CGPMCs were placed at or within 1 mm short of the actual WL in 36% of teeth when using an EAL.
- Radiographic examination suggested that 64% of CGPMC placements were at or within 1 mm short of WL.
Conclusions:
- EAL-guided CGPMC placement accuracy can be variable.
- Radiographic assessment may overestimate the accuracy of CGPMC placement at WL.