Purpose: monitor the outcome of periradicular surgery using microsurgical techniques and root-end filling with MTA • N= 276 teeth
•Surgery was performed: A full-thickness flap, an intrasulcular incision, a vertical incision, Root-end resection 3 mm, Root-end preparation ultrasonically 3-mm deep , the root-end filling was Proroot MTA White. •Mean follow up: 18 months (range:4-72 months).
1.Each case was placed in a category based on clinical & radiologic assessments.
2.Healing criteria included the absence of clinical signs & symptoms, radiographic classification of complete or incomplete healing. Included in this group were the uncertain cases.
3.Nonhealing teeth included cases in which there were continuing signs & symptoms and radiologic evidence of no bony infill. an increase in the size of periradicular radiolucency, or in which the tooth had been lost for other reasons, including root fractures and periodontal disease.
Most highlighted Results:
1.Combining the complete, incomplete, and uncertain groups, the overall success rate was 88.8%
2.There was a statistically significant difference in success rates between the cases treated for the first time and those cases in which surgery was being repeated.
3.There were no significant differences in healing between teeth restored with and without posts at the time of operation.
• Resurgery cases often have a lower success rate than first-time surgeries.