Application of porous titanium in prosthesis production using a moldless proces : Evaluation of physical and mechanical properties with various particle sizes, shapes, and mixing ratios

• Material Type: 博士論文
• Title: Application of porous titanium in prosthesis production using a moldless proces : Evaluation of physical and mechanical properties with various particle sizes, shapes, and mixing ratios
• Author/Editor: Prananingrum, Widyasri; Tomotake, Yoritoki; Naito, Yoshihito; Bae, Jiyoung; Sekine, Kazumitsu; Hamada, Kenichi; Ichikawa, Tetsuo
• Author Heading: Prananingrum, Widyasri; Tomotake, Yoritoki; Naito, Yoshihito; Bae, Jiyoung; Sekine, Kazumitsu; Hamada, Kenichi; Ichikawa, Tetsuo
• Publication, Distribution, etc.: Elsevier Ltd.
• Publication Date: 2016-04-19
• Publication Date (W3CDTF): 2016-04-19
• Alternative Title: モールドレス成形によるチタン多孔体の補綴装置への応用 ： 物理的および機械的性質における粉末粒径、形状と混合比率が及ぼす影響
• Periodical title: Journal of the Mechanical Behavior of Biomedical Materials
• No. or year of volume/issue: 61
• Volume: 61
• Pages: 581-589
• ISSN (Periodical Title): ISSN : 1751-6161
• Degree grantor/type: 徳島大学
• Date Granted: 2016-09-23
• Dissertation Number: 甲第2977号
• Degree Type: 博士（歯学）
• Text Language Code: eng
• Subject Heading: prosthesis; moldless proces; particle size; particle shape; mixing ratios
• Target Audience: 一般
• Note (General): The prosthetic applications of titanium have been challenging because titanium does not possess suitable properties for the conventional casting method using the lost wax technique. We have developed a production method for biomedical application of porous titanium using a moldless process. This study aimed to evaluate the physical and mechanical properties of porous titanium using various particle sizes, shapes, and mixing ratio of titanium powder to wax binder for use in prosthesis production. CP Ti powders with different particle sizes, shapes, and mixing ratios were divided into five groups. A 90:10 wt% mixture of titanium powder and wax binder was prepared manually at 70℃. After debinding at 380℃, the specimen was sintered in Ar at 1100℃ without a mold for 1h. The linear shrinkage ratio of sintered specimens ranged from 2.5% to 14.2%. The linear shrinkage ratio increased with decreasing particle size. While the linear shrinkage ratio of Groups 3, 4, and 5 were approximately 2%, Group 1 showed the highest shrinkage of all. The bending strength ranged from 106 to 428 MPa under the influence of porosity. Group 1 and 2 presented low porosity followed by higher strength. The shear bond strength ranged from 32 to 100 MPa. The shear bond strength was also particle-size dependent. The decrease in the porosity increased the linear shrinkage ratio and bending strength. Shrinkage and mechanical strength required for prostheses were dependent on the particle size and shape of titanium powders. These findings suggested that this production method can be applied to the prosthetic framework by selecting the material design.
• Format (IMT): application/pdf
• Access Restrictions: インターネット公開
• Related Material (DOI): 10.1016/j.jmbbm.2016.04.021
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 徳島大学 : 徳島大学機関リポジトリ

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