Nonsurgical Endodontic Retreatment of Advanced Inflammatory External Root Resorption Using Mineral Trioxide Aggregate Obturation
Figure 1
(a) Preoperative periapical radiograph showing periapical lesion and external apical and lateral root surface resorption in a maxillary left central incisor. The radiograph also reveals previous poor quality obturation. (b) Radiograph after removal of old gutta percha filling showing root canal outline completely visible through resorption defect. Bone resorption adjacent to resorption lacunae on root is also evident. (c) Working length radiograph. (d) Immediate postobturation radiograph showing adequate density of MTA obturation without voids and good adaptation of MTA to root contours. (e) Six-month followup periapical radiograph revealing stability of resorption and periapical healing. (f) Advanced osseous healing of periapical tissues and initiation of repair adjacent to lateral root surface resorption at 12 months. (g) An 18-month radiographic view showing complete regeneration of periradicular tissues and advanced osseous healing evident in the lateral periodontal tissues.
