Removal of Implants Displaced into the Mandibular Bone : A Report of Two Cases

DOI
  • YOSHITAKE Yoshihiro
    Itoh Dent-Maxillofacial Hospital Kyushu Branch Kyushu Branch (Kyushu Implant Research Group)
  • YOSHITAKE Hiromi
    Itoh Dent-Maxillofacial Hospital Kyushu Branch Kyushu Branch (Kyushu Implant Research Group)
  • NARIMATSU Ikue
    Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University
  • HASHIGUCHI Yuma
    Kyushu Branch
  • MANABE Kanako
    Section of Oral and Maxillofacial Surgery, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University
  • SASAKI Masanori
    Kyushu Branch
  • KAKU Toshio
    Kyushu Branch Kyushu Branch (Kyushu Implant Research Group)
  • MATSUSHITA Yasuyuki
    Itoh Dent-Maxillofacial Hospital Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University
  • ITOH Takatoshi
    Itoh Dent-Maxillofacial Hospital Kyushu Branch Kyushu Branch (Kyushu Implant Research Group)
  • AYUKAWA Yasunori
    Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University

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Other Title
  • 下顎骨内に迷入したインプラント体を撤去した2症例

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<p>It is generally easier to achieve favorable primary stability in mandibular dental implant cases than in maxillary cases because the mandibular bone is harder. Nevertheless, we have experienced two cases of dental implants that were displaced into the mandibular bone. We present these two cases and describe their removal and the clinical consequences.</p><p>Case 1 : A 52-year-old female patient. The implant body was displaced into the mandibular bone during placement of the implant. The displaced implant was removed with a long guide pin from the hole made during implant surgery.</p><p>Case 2 : A 35-year-old female patient. The implant body was displaced into the mandibular bone during placement of the implant using a torque wrench. In this case, a 3-D model was prepared using computed tomographic (CT) data to simulate the surgery to remove the implant body. Buccal cortical bone was cut out and the implant body was safely removed. In both cases, no sequelae such as nerve paralysis were reported.</p><p>It is widely known that the information from panoramic and CT images is important. However, it should be emphasized that the surgeonʼs own tactile sensation during preparation of the implant bed is also important. It is recommended to decide the drilling and placement protocol based on feel during the implant surgery.</p><p>A displaced implant can be removed using either a crestal approach or a lateral approach. It is important to remove the displaced implants with appropriate surgical planning using CT data at an early timing.</p>

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