الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
This study was conducted to evaluate and compare the efficacy of obturation material removal in root canal retreatment using two different rotary NiTi instruments with the use of two different gutta-percha and sealer solvents in straight versus curved canals in terms of:
1-Canal wall cleanliness
2-Operating time
3-Procedural errors.