Stress Analysis of Human Tooth Root Using Various Root Canal Instruments


    loading  Checking for direct PDF access through Ovid

Abstract

This study compared external root stresses from instrumentation by several motor-driven nickel-titanium instruments to stresses developed by hand files. Twelve curved first molar mesial roots were invested in PLM-9 photoelastic material to disclose net stress transmitted from the canal through the dentin. Minimal fringe patterns were observed during instrumentation with all techniques. Lightspeed yielded the least change. In no case was a complete 60 psi fringe change noted.

    loading  Loading Related Articles