Artificial joint with macro-hetero structure for biological and mechanical compatibility

2015 Fiscal Year Final Research Report

• Project/Area Number: 25462354
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Orthopaedic surgery
• Research Institution: Fukuoka University
• Principal Investigator: Moriyama Shigeaki 福岡大学, 工学部, 教授 (00299538)
• Co-Investigator(Kenkyū-buntansha): YANASE Keiji 福岡大学, 工学部, 准教授 (20580187) ; NAKAMURA Yoshinari 福岡大学, 医学部, 助教 (00551730) ; MAEYAMA Akira 福岡大学, 医学部, 講師 (20598156) ; KIM Hyojin 福岡大学, 工学部, 助教 (00568769) ; OSAWA Takako 福岡大学, 工学部, 助教 (30638193)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 人工関節 / マクロヘテロ構造 / 力学的適合性

Outline of Final Research Achievements

In artificial joint, mechanical mismatch occurs between bone and artificial joint made from metal materials. To solve the mechanical mismatch between bone and the artificial joint, the objective of this study is the realization of the artificial joint material having mechanical characteristics of the bone. We created titanium alloy-resin composite of the macro-hetero structure to suggest as artificial joint material and examined mechanical characteristics. As a result, we were able to obtain a complicated porous structure similar to the cancellous bone, and non-homogeneous elastic modulus was measured from its specimen. Mechanical test results using the simple specimen suggested the possibility of the materials with non-homogeneous mechanical properties like bone.
The stem geometry of the macro-hetero structure obtained by structure optimization and stem with macro-hetero structure was prototyped.

Free Research Field

生体医工学