Plate and splint construct testing on cadaveric rib model
The Synthes MatrixRIB Fixation System was tested in a cadaveric model to withstand
five times higher than normal in-vivo loads for a duration representative of more
than 2 weeks of fracture healing (360,000 cycles). Furthermore, a second group
of plates were mounted on plastic test blocks and subjected to 15 times higher-than-normal
in vivo loads for a duration representative of more than 6 weeks of fracture healing
(1,000,000 cycles).
Overview of cadaveric bone testing model
Cadaveric rib test setup
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Cadaveric rib plate and splint testing summary
- Bending stiffness of plate testing constructs was comparable to unfractured cadaveric
osteoporotic rib (Figure 1).
- All plate and splint constructs survived exaggerated dynamic loading (bending
loads 5 times greater than respiration for 360,000 cycles) in a cadaveric model
without construct failure.
- Plate and splint constructs retained sufficient strength after dynamic loading
to support loads greater than respiration at an exaggerated level (Figure 2).
- Splint construct provided stable fixation during the dynamic loading with no observed
implant migration.
Figure 1
Figure 2
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Bench testing on plastic blocks1
- Plates survived bending loads approximately 15 x greater than respiratory loading
(600 Nmm) for 1,000,000 cycles.
Note: Mechanical test results are not necessarily indicative of clinical performance.
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