الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The aim of the study is to compare the postoperative pain after rotary
instrumentation using the ProTaper Universal system and OneShape system
for one visit root canal treatment in necrotic maxillary/mandibular anterior
/premolar teeth at certain time points: after 6 hours, 12 hours, 24 hours and
48 hours postoperatively, using numerical rating scale (NRS).