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PDF] Shaping Abilities of Two Different Engine-Driven Rotary Nickel Titanium Systems or Stainless Steel Balanced-Force Technique in Mandibular Molars by Michael J. Matwychuk, Walter R. Bowles, Scott B. McClanahan, James S. Hodges,
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ProTaper retreatment system versus balanced force technique for apical extrusion and gutta-percha removal | International Dental Research
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