1Allard U, Stromberg T (1979) Inflammatory reaction in the apical area of pulpectomized and sterile root canals in dogs. Oral surgery, oral medicine, and oral pathology 48: 463-466.

2Amezcua O, Gonzalez AC, Borges AH, Bandeca MC, et al. (2015) Sealing ability of root-end filling materials. The journal of contemporary dental practice16:210-214.

3Amler MH (1969) The time sequence of tissue regeneration in human extraction wounds. Oral surgery, oral medicine, and oral pathology 27:309-318.

4Ayup H, Duane B (2018) Limited evidence on best material for retrograde root fillings. Evidence- based dentistry 19: 8-9.

5Baek SH, Lee WC, Setzer FC, Kim S (2010) Periapical bone regeneration after endodontic microsurgery with three different root-end filling materials: amalgam, SuperEBA, and mineral trioxide aggregate. Journal of endodontics 36:1323-1325.

6Beck-Broichsitter BE, Schmid H, Busch HP, Wiltfang J, Becker ST (2018) Long-term survival of teeth in the posterior region after apical surgery. Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 46:1934-1938.

7Benz K, Markovic L, Jordan RA, Novacek C, Jackowski J (2017) In vitro evaluation of theapical seal of two different retrograde filling materials. Australian endodontic journal: the journal of the Australian Society of Endodontology Inc 43:29-33.

8Bernabe PF, Holland R, Morandi R, de Souza V, Nery MJ, OtoboniFilho JA, et al. (2005) Comparative study of MTA and other materials in retrofilling of pulpless dogs' teeth. Brazilian dental journal 16:149-155.

9Torabinejad M, Lozada J, Puterman I, White SN (2008) Endodontic therapy or single toothimplant? A systematic review. Journal of the California Dental Association 36:429-437.

10Chan CP, Lin CP, Tseng SC, Jeng JH (1999) Vertical root fracture in endodontically versus non endodontically treated teeth: a survey of 315 cases in Chinese patients. Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 87: 504-507.

11Christiansen R, Kirkevang LL, Horsted-Bindslev P, Wenzel A (2009) Randomized clinical trial of root-end resection followed by root-end filling with mineral trioxide aggregate or smoothing of the orthograde gutta-percha root filling--1-year follow-up. International endodontic journal 42: 105-114.

12Del Fabbro M, Corbella S, Sequeira-Byron P, Tsesis I, Rosen E, Lolato A, et al. (2016) Endodontic procedures for retreatment of periapical lesions. The Cochrane database of systematic reviews 10: CD005511.

13Dou L, Li D, Xu T, Tang Y, Yang D (2017) Root anatomy and canal morphology of mandibularfirst premolars in a Chinese population. Scientific reports 7: 750.

14Orstavik D, Kerekes K, Eriksen HM (1986) The periapical index: a scoring system for radiographic assessment of apical periodontitis. Endodontics & dental traumatology 2: 20-34.

15Orstavik D, Qvist V, Stoltze K (2004) A multivariate analysis of the outcome of endodontic treatment. European journal of oral sciences 112: 224-30.

16Friedman S (2011) Outcome of endodontic surgery: a meta-analysis of the literature-part 1: comparison of traditional root-end surgery and endodontic microsurgery. Journal of endodontics 37: 577-578.

17Friedman S (1997) Success and failure of initial endodontic therapy. Ontario dentist 74:35-38.

18Sutherland SE (2001) Evidence-based dentistry: Part IV. Research design and levels of evidence.Journal 67:375-378.

19Rud J, Andreasen JO, Jensen JE (1972) Radiographic criteria for the assessment of healingafter endodontic surgery. International journal of oral surgery 1:195-214.

20Molven O, Halse A, Grung B (1987) Observer strategy and the radiographic classification of healing after endodontic surgery. International journal of oral and maxillofacial surgery 16:432-439.

21Kruse C, Spin-Neto R, Christiansen R, Wenzel A, Kirkevang LL (2016) Periapical Bone Healing after Apicectomy with and without Retrograde Root Filling with Mineral Trioxide Aggregate: A 6- year Follow-up of a Randomized Controlled Trial. Journal of endodontics. 42:533-537.

22Fuss Z, Lustig J, Tamse A (1999) Prevalence of vertical root fractures in extracted endodontically treated teeth. International endodontic journal 32: 283-286.

23Ma X, Li C, Jia L, Wang Y, Liu W, Zhou X, et al. (2016) Materials for retrograde filling in rootcanal therapy. The Cochrane database of systematic reviews 12: CD005517.

24Schultz CB, Westhauser P, Niderost B, Klaus WG (2005) [Retrograde obturation with MTACement and Super-EBA after apicoectomy. Sealing ability of MTA and Super-EBA in dye penetration tests]. Schweizer Monatsschrift fur Zahnmedizin = Revue mensuellesuissed'odonto-stomatologie = Rivistamensilesvizzera di odontologia e stomatologia 115: 442-54.

25Song M, Kim E (2012) A prospective randomized controlled study of mineral trioxide aggregate and super ethoxy-benzoic acid as root-end filling materials in endodontic microsurgery. Journal of endodontics 38: 875-879.

26Walivaara DA, Abrahamsson P, Fogelin M, Isaksson S (2011) Super-EBA and IRM as root-end fillings in periapical surgery with ultrasonic preparation: a prospective randomized clinical study of 206 consecutive teeth. Oral surgery, oral medicine, oral pathology, oral radiology, andendodontics 112:258-263.

27Walivaara DA, Abrahamsson P, Isaksson S, Salata LA, Sennerby L, Dahlin C (2012) Periapical tissue response after use of intermediate restorative material, gutta-percha, reinforced zinc oxide cement, and mineral trioxide aggregate as retrograde rootend filling materials: a histologic study in dogs. Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons. 70: 2041-2047.

28Wang N, Knight K, Dao T, Friedman S (2004) Treatment outcome in endodontics-The Toronto Study. Phases I and II: apical surgery. Journal of endodontics 30:751-761.

29Zuolo ML, Ferreira MO, Gutmann JL (2000) Prognosis in periradicular surgery: a clinical prospective study. International endodontic journal 33: 91-98.

30vonArx T, Penarrocha M, Jensen S (2010) Prognostic factors in apical surgery with root-end filling: a meta-analysis. Journal of endodontics 36: 957-973.

31Taschieri S, Machtou P, Rosano G, Weinstein T, Del Fabbro M (2010) The influence of previous non-surgical re-treatment on the outcome of endodontic surgery. Minerva stomatologica 59: 625-632.