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Drag on a Cylinder with an Apple-Shaped Cross Section

World Journal of Mechanics 2016年第9期6卷 323-339页

作者： hirono matsumoto Yoshihiro Kubota Masayuki Ohishi Osamu Mochizuki Graduate School of Biomedical Engineering Toyo University Saitama Japan Faculty of Science and Engineering Toyo University Saitama Japan Daikirika Kogyo Inc. Saitama Japan Department of Biomedical Engineering Toyo University Saitama Japan

The drag on a cylinder with an apple-shaped cross section was studied numerically in this paper. This cross section is adopted because the drag on an apple is known to be lower than that of a sphere. Since the hollows of an apple seem to be points of drag reduction, two-dimensional numerical simulations of cylinders with hollows of several shapes are carried out at a Reynolds number of 6.7 × 104 by using the vortex method to check their effects. The cylinder with hollows like those of a real apple attained a 13% reduction in drag compared with a circular cylinder. Other geometrical hollow-shapes, namely, V-shaped and U-shaped grooves, also reduced drag from the circular model, but these effects were less pronounced than those of the apple-shaped cross section. It was concluded that an apple-like hollows were effective for drag reduction of a cylin-der as well as a sphere.

关键词： Drag Reduction Apple Cylinder Vortex Method k-ε Model Flow Visualization

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Zygomatic Implant-Supported Prosthesis: When the Prosthetic Rehabilitation Affects the Function: A Case Report

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Open Journal of Stomatology 2017年第10期7卷 448-454页

作者： Wilson matsumoto Rossana Pereira De Almeida Alexandre Elias Trivellato Cassio Edvard Sverzut Takami hirono Hotta Dental Materials and Prosthodontic Department Dental School of Ribeir&atilde o Preto University of S&atilde o Paulo S&atilde o Paulo Brazil Oral and Maxillofacial Surgery Traumatology and Periodontology Department Dental School of Ribeir&atilde o Preto University of S&atilde o Paulo S&atilde o Paulo Brazil

The oral rehabilitation of edentulous patients can be done in different ways depending on the alveolar ridge morphology and patient expectations. The objective of this clinical case was to report prosthetic and functional adaptation difficulties when conventional complete denture was changed to a zygomatic implant-supported prosthesis. We report a 52-year-old male singer with an atrophic maxilla who was rehabilitated with zygomatic implant-supported prosthesis using 4 implants. However, the thickness of the prosthesis in the palatal region and the space between the prosthesis and soft tissue caused difficulty in speaking and singing. The palatal region of the prosthesis was trimmed and the anterior region of the prosthesis was relined. These procedures were performed to make room for the tongue and minimize the passage of air during speech. Adaptations in the shape of the prosthesis must be made to enable its use, without compromising its strength.

关键词： Zygomatic Implant Branemark Protocol Implant Prosthesis

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Late Regularization of the Alveolar Ridge in a Patient with a Prosthesis and Special Needs: A Case Report

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Open Journal of Stomatology 2018年第11期8卷 305-311页

作者： Wilson matsumoto Alexandre Elias Trivellato Rossana Pereira de Almeida Antunes Cássio Edvard Sverzut Guilherme Spagnol Cristian Sbardelotto Takami hirono Hotta Department of Dental Materials and Prosthodontics University of S&atilde o Paulo S&atilde o Paulo Brazil Department of Oral and Maxillofacial Surgery and Periodontology University of S&atilde o Paulo S&atilde o Paulo Brazil Department of Dental Materials and Prostheses University of S&atilde o Paulo S&atilde o Paulo Brazil

Residual ridge shape is important for the seating of a prosthesis. The objective of this case report was to illustrate the importance of reduction maneuvers with regard to alveolar bone plates after multiple tooth extractions in patients with prostheses and special needs. In the current patient, there were difficulties during the adaptation and fitting of the upper denture. Bilateral bone resection was indicated in the molar buccal region. Late regularization of the alveolar ridge, which was accomplished in hospital, was necessary for the preparation, adaptation, and use of the denture. The general and systemic health care of the patient should be monitored throughout surgical intervention. Though tooth extractions are common procedures, particular attention is required to ensure adequate alveolar ridge remodeling that is conducive to oral rehabilitation.

关键词： Alveolar Ridge Adaptation Denture Exostoses

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