Online ISSN : 2435-0389
Print ISSN : 0389-4045
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Displaying 1-2 of 2 articles from this issue
  • Manjin ZHANG, Mariko HATTORI, Mahmoud E. ELBASHTI, Yuka I. SUMITA
    2021 Volume 44 Issue 1 Pages 1-6
    Published: 2021
    Released on J-STAGE: December 01, 2021
    Purpose: The purpose of this study was to compare data acquisition using two different intraoral scanners in the same maxillectomy patients.
    Materials and Methods: Maxillectomy defects and dentate maxillary arches of 6 patients were scanned by TRIOS 3 and Trophy 3DI PRO. Areas of 3-dimensional (3D) data were calculated using 3D analysis software. Acquired polygon areas were tested for significant differences between the scanners.
    Results: Scans captured residual teeth in most patients, but not entire maxillectomy defects. The areas of 3D data significantly differed between the scanners (P<0.05).
    Conclusion: More scanning data were acquired in all cases by TRIOS 3 than by Trophy 3DI PRO. However, neither scanner could acquire complete maxillary defect data.
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  • Norinaga KOJIMA, Fumi YOSHIOKA, Shogo OZAWA, Masaki HATA, Ryohei MATSU ...
    2021 Volume 44 Issue 1 Pages 7-13
    Published: 2021
    Released on J-STAGE: December 01, 2021
    A patient underwent closure surgery for perforation of the nasal dorsum due to diphtheria in early childhood, and then a femoral flap transplantation had been performed at the same site 40 years ago. Her external nose remained, but was depressed due to a defect in the nasal septum. The nasal cavity and oral vestibule were connected. Previously, the patient’s self-made appliance was used to maintain the height of the nasal dorsum.
    Therefore, we made two obturator prostheses using two different materials, a denture base resin and a silicone relining material. After using the silicone obturator prosthesis for 2 months, a questionnaire was carried out. The questionnaire included 11 questions classified into material, feeling, maintenance, esthetics, and overall evaluation. After using the silicone obturator prosthesis for 1 year and 6 months, the color difference, hardness, and surface roughness of the silicone relining material were evaluated. Both types of nasal prostheses maintained the height of the nasal dorsum, and improved esthetics and functionality.
    The hardness of the material of a prosthesis used in the nasal cavity is important; the softness of silicone relining material improves its stability and comfort. The silicone relining material maintained sufficient elasticity and color tone during long-term use.
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