A Method of Reproducing Bone-anchored Implant Superstructures Using an Oral Scanner and New Scan Gauges

DOI
  • ARAI Masami
    Nagasaki University Hospital Dental Implant Center Kanto-Koshinetsu Branch (Kyoto Institute of Implantology)
  • ODATSU Tetsurou
    Nagasaki University Hospital Dental Implant Center
  • SATO Yuki
    Kanto-Koshinetsu Branch (Minatomirai (MM) Implant Academy)
  • KATAYAMA Shoichi
    Kanto-Koshinetsu Branch (Kyoto Institute of Implantology)
  • SAKURAI Yuya
    Nagasaki University Hospital Dental Implant Center Kanto-Koshinetsu Branch (Minatomirai (MM) Implant Academy)
  • MATSUO Kazuki
    Nagasaki University Hospital Dental Implant Center Kanto-Koshinetsu Branch (Minatomirai (MM) Implant Academy)
  • ISHIWATA Hiromichi
    Nagasaki University Hospital Dental Implant Center Kanto-Koshinetsu Branch (Minatomirai (MM) Implant Academy)
  • SAWASE Takashi
    Nagasaki University Hospital Dental Implant Center

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Other Title
  • 口腔内スキャナーと新規スキャンゲージによりインプラント上部構造を複製した1症例

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Abstract

<p>Bone-anchored implant superstructures are recognized as predictable treatment modalities for edentulous patients with a high survival rate of the implants. However, prosthodontic complications, such as fracture and artificial teeth wear, sometimes occur under long-term use, resulting in the need to reproduce the prostheses. This article introduces a new digital workflow using an intraoral scanner and novel scan gauges to reduce the number of appointments for the patient.</p><p>A 55-year-old man with a chief complaint related to masticatory difficulty was referred due to fracture and tooth wear of prostheses. In 2010, four implants had been placed in both the upper and lower edentulous jaws and treated with bone-anchored bridges made from acrylic resin. During 10 years of use, the prostheses had become severely damaged. The damaged prostheses were tentatively fixed and used as provisional restorations for adjustment of the occlusion and mucosal aspects. To reproduce the prostheses, an intraoral scanner and novel scan gauges were used to transfer the positions of the implants, morphology of the mucosa, occlusion, and shape of the provisional restoration at the first appointment. The reproduced definitive prostheses made from a zirconia framework cemented on a titanium base were provided at the second appointment.</p><p>It is suggested that this reproduction method can not only reduce the number of appointments and distress of the conventional impression-taking for both patient and dentist, but also provide precise prostheses.</p>

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