Fig. (3) Clinical application of B-G during endodontic surgery. (a) Intraradicular post protruding through a perforation is noted radiographically; (b) Post reduction followed by root repair; (c) B-G placed into the surgical crypt prior to closure; (d) At one-year follow-up, resolution of furcal radiolucency; (e) Preoperative radiological situation; (f) Completed root-end filling; (g) B-G embedded in the bone cavity; (h) Resolution of radiolucency and reattachment of periodontal ligament at one-year control; (i) Preoperative periapical x-ray; (j) Retrofilling placed; (k) Immediate post-operative x-ray following apicoectomy with concomitant B-G grafting; (l) One-year follow up radiograph shows complete healing; (m) Preoperative periapical radiograph; (n) Terminated retrograde filling; (o) Intraoperative image showing B-G in place to fill in the bony cavity; (p) Radiological situation one year after surgery representing complete resolution of the periapical lesion.