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A new friction tester of the flexor tendon
- Source :
- Journal of biomechanics. 32(10)
- Publication Year :
- 1999
-
Abstract
- We have developed a new device to measure the friction force and calculate the friction coefficient between a rabbit flexor tendon, a pulley and a proximal phalanx. The flexor digitorum fibularis tendon of a rabbit was taken intact with the proximal phalanx, and tendon pulleys were attached to both ends of the bone. Both ends of the tendon were clamped to acrylic plates and connected to stainless-steel plates equipped with strain gauges. A pretension of 1.96 N was applied so as not to loosen the tendon. The proximal phalanx was fixed to an acrylic plate on the actuator, which gave 8 mm of transfer to the acrylic plate at a speed of 2 mm/s. The interface between the tendon and the surrounded tissue created the friction force, when the load was applied on the distal pulley. The friction force could be obtained from the difference between the tension of both ends of the tendon, which was measured with strain gauges and sampled with a personal computer. The friction force and the friction coefficient were calculated from the measured force and the applied load. The load and the pre-loading time, which was defined as loading duration before gliding, were varied in order to observe the change of the friction coefficient. The friction coefficient was not affected by the load and increased with the pre-loading time. The value of μ s ranged from 0.027 to 0.111 (0.072±0.023), and that of μ d ranged from 0.010 to 0.069 (0.039±0.014) (pre-loading time was 5 s). Our method will allow for the examination of various surgical treatments and lubricants. Moreover, it can be applied to other tissues of any animals with similar structures to the rabbit's digitorum.
- Subjects :
- musculoskeletal diseases
Male
medicine.medical_specialty
business.product_category
Materials science
Friction
Biomedical Engineering
Biophysics
In Vitro Techniques
Models, Biological
Pulley
Tendons
Weight-Bearing
medicine
Animals
Orthopedics and Sports Medicine
Composite material
Strain gauge
Friction coefficient
Flexor tendon
Tension (physics)
Rehabilitation
musculoskeletal system
Tendon
Surgery
body regions
medicine.anatomical_structure
Personal computer
Lubrication
Female
Rabbits
Stress, Mechanical
business
Subjects
Details
- ISSN :
- 00219290
- Volume :
- 32
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Journal of biomechanics
- Accession number :
- edsair.doi.dedup.....17c038015d11de3a44de9a32d23e15e3