Application of the Duplicate Denture to Implants-supported Prosthesis for Extensive Maxillary Defect

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  • SHIMODAIRA Osamu
    Department of Geriatric Dentistry, Showa University School of Dentistry
  • SHIROTA Tatsuo
    Department of Oral and Maxillofacial Surgery, Showa University School of Dentistry
  • SATO Yuji
    Department of Geriatric Dentistry, Showa University School of Dentistry

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Other Title
  • 上顎広範囲顎欠損症例に対するインプラント　顎補綴治療への複製義歯の応用
  • 症例報告 上顎広範囲顎欠損症例に対するインプラント顎補綴治療への複製義歯の応用
  • ショウレイ ホウコク ジョウガク コウハンイ ガク ケッソン ショウレイ ニ タイスル インプラント ガク ホテツ チリョウ エ ノ フクセイ ギシ ノ オウヨウ

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Recently, there has been an increase in the application of dental implants in maxillofacial prosthesis due to the degree of difficulty involved in such prosthetic treatment in comparison with general partially edentulous treatment. Zygomatic implants are recognized to provide a high degree of orofacial function recovery in cases of extensive maxillary defects, and thus contribute to improvements in QOL. The present report introduces the use of zygomatic implants and a duplicate of an existing prosthesis for the efficient fabrication of a maxillofacial prosthesis with superior function in the treatment of extensive maxillary defects.<br/>The patient was a 46-year-old male, who initially presented with squamous cell carcinoma of the maxillary anterior region. After radical surgery for squamous cell carcinoma, a prosthesis for the resulting maxillary defect was inserted using the remaining teeth as abutments. Later, the prosthesis became unstable due to loss of the remaining teeth. To solve this problem, an implant-supported prosthesis using zygomatic implants was planned. It is important to provide a superstructure which does not interfere with esthetics and speech. Therefore, the position of the implant body, the circumoral tissues, the extent of rehabilitation of the palatal defect and midfacial support, and the maxillomandibular relationship should be simultaneously recorded. A duplicate of the existing prosthesis provided a standard, and was used for impression taking and maxillomandibular registration.<br/>Using this technique, a prosthesis which allowed effective mastication, speech, and other orofacial functions was efficiently fabricated.

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