Development of anatomical acetabular reinforcement implants for artificial hip arthroplasty adapted to the pelvic morphology of Japanese patients.

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K09475
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 56020:Orthopedics-related
• Research Institution: Kanazawa University
• Principal Investigator: Kabata Tamon 金沢大学, 医学系, 准教授 (10334749)
• Co-Investigator(Kenkyū-buntansha): 上野 琢郎 金沢大学, 医学系, 協力研究員 (80800622)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 人工股関節 / 寬骨臼 / 力学試験 / 有限要素解析

Outline of Final Research Achievements

We were able to establish a design and create a prototype implant of an acetabular reconstructive reinforcement plate for revision hip arthroplasty adapted to the anatomical pelvic morphology of a Japanese patient. The augment device to be attached to the pallet portion of the plate and the liner placing guide were designed and created. At the same time, we designed the special equipment for making the augment and completed the prototype. Mechanical tests using pelvic bone models and finite element analysis were conducted, and it was confirmed that the developed plate outperformed the existing plate in all areas of strength and stress/strain on the implant. Static load tests were conducted on the implants, and it was confirmed that the developed plate was superior to the existing plate in terms of strength.

Free Research Field

整形外科学

Academic Significance and Societal Importance of the Research Achievements

寬骨臼に大きな骨欠損がある症例に使用される人工股関節寬骨臼用補強インプラントのほとんどは25年以上前に開発されたものであり、最新の人工関節設置理論やテクノロジーにそぐわなくなってきているが、この研究で開発したインプラントは、従来品の欠点を補えうるデザインと性能を有していると考えられた。インプラントの設置に関しては、日本人の解剖に適合した特徴的なデザインと、インプラント自体が骨盤の基準座標の指標となり得るような工夫を凝らしたことで、技術的に容易で再現性の高い設置が可能となったと考えられる。強度的にも従来品を凌駕しており、順調に開発が進めば、近日中に画期的な製品として臨床応用される可能性が高い。