A Case of Bone Resorption Following Augmentation Genioplasty with a Silicone Implant

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There are two types of operation for chin augmentation. One is augmentation genioplasty by means of horizontal osteotomy, and the other is implantation with alloplastic materials, such as silicone implants and hydroxyapatite blocks. Augmentation genioplasty with silicone implants is easy and can be performed under local anesthesia. However, augmentation genioplasty with silicone implants tends to produce post-operative infection, bone resorption of the chin, and malposition of implants. We report a case of mandibular resorption and infection following augmentation genioplasty with a silicone implant.<BR>A 50-year-old female underwent augmentation genioplasty with silicone implantation about 8 years ago in Korea. At 7 years post-operation she noticed swelling and paresthesia in the mental region and so consulted our department. An abscess and an operative scar were observed in the intraoral mandibular incisor region. An implant was observed in the mental region, and some absorption of the bone beneath the implant radiographically. The implant was removed surgically. The implant surrounded by granulation tissue caved in the surface of the chin bone which was absorbed irregularly. These findings suggested that the resorption of surface bone under silastic implant was caused by the continuous pressure of musculus mentalis.
特定非営利活動法人日本顎変形症学会の論文