Comparison of the Relative Risk of Molar Root Perforations Using Various Endodontic Instrumentation Techniques.
Rept. for 1981-1983,
ARMY INST OF DENTAL RESEARCH WASHINGTON DC
Pagination or Media Count:
One hundred canals in the mesial roots of sixty mandibular molars were instrumented using five techniques. The remaining twenty canals became uninstrumented controls. A standard technique without flaring and four techniques with flaring were evaluated. Two of the flare techniques used only hand instrumentation circumferential and anticurvature while two used additional engine-driven instrumentation round burs and Gates-Glidden burs. Of the flare techniques, hand instrumentation used in an anticurvature manner showed significantly less risk less than .005 to the bifurcation root surface. The engine-driven techniques were not significantly different than circumferential hand instrumentation in their risk to the bifurcation area.
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