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ID 109960
タイトル別表記
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
著者
プラナニングルム, ウィディヤスリ 徳島大学大学院口腔科学教育部(口腔科学専攻)
Bae, Jiyoung Tokushima University
キーワード
prosthesis
moldless proces
particle size
particle shape
mixing ratios
資料タイプ
学位論文
抄録
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.
掲載誌名
Journal of the Mechanical Behavior of Biomedical Materials
ISSN
17516161
cat書誌ID
AA12344261
出版者
Elsevier Ltd.
61
開始ページ
581
終了ページ
589
発行日
2016-04-19
備考
内容要旨・審査要旨・論文本文の公開:
内容要旨 : LID201611141028.pdf
審査要旨 : LID201611141029.pdf
論文本文 : k2977_fulltext.pdf
本論文は,著者Widyasri Prananingrumの学位論文として提出され,学位審査・授与の対象となっている。
著者の申請により要約(2016-11-15公開)に替えて論文全文を公開(2019-10-08)
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
博士論文全文を含む
文科省報告番号
甲第2977号
学位記番号
甲口第411号
学位授与年月日
2016-09-23
学位名
博士(歯学)
学位授与機関
徳島大学
部局
病院
歯学系