Outcome of Endodontic Retreatment in One or Two Visits

Inclusion Criteria

• •Patients that demonstrate understanding of the study and willingness to participate as evidenced by signing the voluntary informed consent and received a signed and dated copy of the informed consent form.
• •Understands and is willing to comply with all study procedures and restrictions.
• •Not presence of clinically significant and relevant abnormalities of clinical history or oral examination.
• •Retreatment cases due to an endodontic failure.
• •Diagnosis of apical periodontitis.
• •Single or bi-radicular teeth.