下顎遊離端欠損症例における無歯部顎堤の形態分析システム : 前後的傾斜の診断法の検討  [in Japanese] Shape Analyzing System for Mandibular Edentulous Distal-extension Ridge : Study on the Examination Method for the Anteroposterior Inclination  [in Japanese]

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Author(s)

    • 村上 格 MURAKAMI Mamoru
    • 鹿児島大学歯学部歯科補綴学第2講座 The 2 nd Department of Prosthetic Dentistry, Kagoshima University Dental School
    • 大塚 昭彦 OHTSUKA Akihiko
    • 鹿児島大学歯学部歯科補綴学第2講座 The 2 nd Department of Prosthetic Dentistry, Kagoshima University Dental School
    • 梶井 正文 KAJII Masafumi
    • 鹿児島大学歯学部歯科補綴学第2講座 The 2 nd Department of Prosthetic Dentistry, Kagoshima University Dental School
    • 浜野 徹 HAMANO Tohru
    • 鹿児島大学歯学部歯科補綴学第2講座 The 2 nd Department of Prosthetic Dentistry, Kagoshima University Dental School
    • 長岡 英一 NAGAOKA Eiichi
    • 鹿児島大学歯学部歯科補綴学第2講座 The 2 nd Department of Prosthetic Dentistry, Kagoshima University Dental School

Abstract

In cases of mandibular distal-extension edentulous ridge, it is considered that the anteroposterior and buccolingual inclinations of the edentulous ridge affect the stress of the abutment teeth transmitted from the removable partial denture.<BR>However, few studies have examined this effect, and ridge inclinations of these areas are usually assessed and diagnosed by visual examination of mounted diagnostic casts.<BR>A shape analyzing system for the mandibular distal-extension edentulous area was developed using a semi-conductor laser, and this system was applied to three cases. In this system, the ridge contour was divided into small triangles and normal lines were drawn at the centers of gravity of the respective triangles. The ridge inclinations were evaluated on the angles between each normal line and the tentative plane of occlusion. The results were shown on a personal computer as the occlusal, lateral, and frontal views, and the distribution on the anteroposterior and buccolingual inclinations of the edentulous ridges was shown by a histogram.<BR>It was considered that this system is more accurate for evaluating the ridge shape on the distribution and degrees of anteroposterior and buccolingual inclinations of the mandibular distal-extension edentulous ridges than visual examination.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(5), 821-829, 1999-10-10

    Japan Prosthodontic Society

References:  37

Cited by:  3

Codes

  • NII Article ID (NAID)
    10008174427
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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