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Influences of metal frame design on the mechanical strength of posterior porcelain fused to metal crown
https://mdu.repo.nii.ac.jp/records/430
https://mdu.repo.nii.ac.jp/records/4305454a69b-c79d-4f18-9b82-ee892252eaa0
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
matsumoto_shigaku_33-03-06.pdf (2.7 MB)
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| Item type | Journal Article(1) | |||||||
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| 公開日 | 2012-05-24 | |||||||
| タイトル | ||||||||
| タイトル | Influences of metal frame design on the mechanical strength of posterior porcelain fused to metal crown | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | PFM crowns | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | frame | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | finite element analysis | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | journal article | |||||||
| その他（別言語等）のタイトル | ||||||||
| その他のタイトル | 臼歯陶材焼付鋳造冠におけるメタルフレーム形態の力学的検討(英文) | |||||||
| 著者 |
WANG, RAORAO
× WANG, RAORAO
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Objectives: The purpose of this study was to find an ideal shape of the metal frame (coping) in the porcelain fused to metal (PFM) crown. The stress distribution was assessed by the load-to-fracture values and a three-dimensional finite element analysis. Methods: Three kinds of coping designs were tested; Design I: Conventional type as control (traditional frame). Design II: 1.0 mm lower than occlusal surface of coping (butterfly frame). Design III: Straight type (flat frame). The load-to-fracture value consisted of three groups (Design I, II and III) of five samples each. The loading location is selected at the area where mesial and distal of the metal frame will coincide with the projection of the occlussal surface. All samples were loaded to fracture at the rate of 0.1 mm/min using a universal-testing machine. The stress distribution was assessed in a three-dimensional finite element model, which consisted of the abutment tooth, cement, metal coping and porcelain. The loading position is the projection point ofbuccal-lingual transitional part of the frame mesial and distal proximal surface on the occlusal surface towards the median, in which the load is in constant value. Loading direction is vertically downward along tooth axis with a load of 2000 N. Results: The mean load-to-fracture value for each group is as follows: Group A (Design I)=1823.0 N±132.7 (S.D.), Group B (Design II)=1940.4 N±147.4 (S.D.), Group C (Design III)=2333.9 N±180.9 (S.D.). The results of the three-dimensional finite element analysis showed that the maximum tensile stress of 84.5 MPa occurred in Design I. The maximum tensile stress in design II and III were 53.8 MPa and 53.3 MPa, respectively, which were the lower than Design I. Conclusions: The results indicated that the butterfly and flat frame designs will increase metal support on proximal porcelain, thus effectively change the stress distribution within the coping and porcelain, optimizing stress distribution in PFM crown under perpendicular load, and enhance structural strength of porcelain of PFM crown. | |||||||
| 書誌情報 |
松本歯学 巻 33, 号 3, p. 299-312, 発行日 2007-12-31 |
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| 出版者 | ||||||||
| 出版者 | 松本歯科大学学会 | |||||||
| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0385-1613 | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AN00232590 | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
