Material properties of human patellar-ligament grafts from the elderly population

Kranjec, Matej (author), Trajkovski, Ana (author), Krašna, Simon (author), Hribernik, Marija (author), Kunc, Robert (author)

The aim of the presented study was to estimate the material properties of human patellar ligaments from the elderly population by means of tensile tests. The experimental part was conducted on a custom tensile-testing device, with a built-in enclosure to simulate in-vivo conditions, using 25 (15 female, 10 male) bone-ligament-bone samples from elderly (age 83 (8)) human donors. During the tensile tests, the resultant force and displacement of the sample attachments were recorded. With this data and the values of the initial length and the initial cross-sectional area of the samples, the engineering stress and strain, the Young's modulus and the toughness at rupture were calculated for each sample. The results were then averaged and presented for all the samples together and for the female and male populations separately. The measured Young's modulus and the failure stress values were found to be significantly higher for the female samples compared to the male (p < 0.05). All the other measured properties did not show a significant difference. The toe region's material properties for the patellar ligament were also presented as valuable information for the anterior cruciate ligament reconstruction. The tensile-test results were compared to other research carried on human patellar ligaments using samples from younger donors. The comparison showed that the samples from the elderly population exhibit lower values of strain at the end of the toe region and have a lower failure strain for the patellar ligament. The Young's modulus and the failure stress of the samples in this study were in the range of other research conducted on patellar ligaments.

• Language: English
• Keywords: patellar ligament, elderly population, material properties, stress-strain, toe region
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; MF - Faculty of Medicine
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 9 str.
• Numbering: Vol. 110, art. 103994
• PID: 20.500.12556/RUL-138440
• UDC: 519.8:611.74(045)
• ISSN on article: 1751-6161
• DOI: 10.1016/j.jmbbm.2020.103994
• COBISS.SI-ID: 25794307
• Publication date in RUL: 20.07.2022

Record is a part of a journal

• Title: Journal of the mechanical behavior of biomedical materials
• Publisher: Elsevier
• ISSN: 1751-6161
• COBISS.SI-ID: 36929285

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: patelarni ligament, starejša populacija, materialne lastnosti, napetost – deformacija

Projects

• Funder: ARRS - Slovenian Research Agency
• Funding programme: Young researchers

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0109
• Name: Modeliranje v tehniki in medicini