**5. Conclusions**

Within the limitations of this study, it was found that GTR techniques increased the success rate of endodontic surgery. The use of bone grafts plus membranes as an adjunct to surgical endodontic treatment promoted complete periapical bone healing, with a higher success rate, and improved the prognosis of endodontic surgery. Therefore, we recommend the use of bone grafts plus membranes as a GTR technique in endodontic surgery.

**Author Contributions:** Conceptualization, Á.Z.-M., R.T. and F.T.; data acquisition, P.V.B.; design, L.S.H.M.; review and editing, J.M.- Á. and S.H.M.; all statistical analyses, J.M.M.-C. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Information is available upon request in accordance with relevant restrictions (e.g., privacy or ethical).

**Conflicts of Interest:** The authors have no conflict of interest.
