Partial Explantation of Failed Dental Implants Placed in Mandibular Canal: A Case Report
One of the most important concerns during posterior mandibular implant placement is avoiding the mandibular canal. Nerve injury can be very disturbing to the patient, possibly causing mild paresthesia to complete anesthesia. Explantation of a dental implant that gas violated the mandibular canal is the most recommended treatment. However, an osseointegrated implant that placed in the mandibular canal can be left if the patient shows no symptoms. In this case report, we describe a technique to maintain the apexes of the implants while partially removing fractured osseointegrated implants previously placed in the mandibular canal.
Figure 1. Intraoral mandibular lateral view showing fractured dental implant in area of teeth #30,31. Figure 2. Periapical radiograph indicates fractured external splines of both implants. Figure 3. (a) Cone beam computerized tomography (CBCT) sagittal view of implant #30,31 showing intrusion of apex of implants into mandibular canal. (b) CBCT coronal view of implant #30. CBCT coronal view of implant #31.
Figure 4. (a) Periapical radiograph showing partial explantation of both implants and maintaining apex of implants. (b) Periapical radiograph showing bone grafting after partial explantation. Figure 5. Four-months postoperative intraoral lateral view.
Figure 6. (a) Periapical radiograph after dental implant placement. (b) Four-months postoperative periapical radiograph of dental implant placement. Figure 7. Screw-retained fixed implant supported single crowns. Figure 8. (a) Periapical radiograph at the delivery visit. (b) One-year periapical radiograph after prosthetic loading.
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