Orthopaedic Biomechanics Laboratories
This laboratory is primarily used to examine the effects of loads on
animal tissues, cartilage, bones, and muscles. These are the pieces of
equipment that are most commonly used:
- Used to determine
the stiffness and other material properties of cartilage.
- Small indenter is
placed in contact with cartilage surface, then compressed with
a 0.1 mm square wave of 150 seconds duration.
- Calculates a force-time
curve, which can be used to measure stiffness and shear modulus
of the cartilage.
2. Miniature Drop-Testing Machine
impact device with a maximum load of 50 lbs and a maximum drop
of 12 inches.
- Used primarily for
testing cartilage impact response
- Has the ability to
test objects that are uneven in shape for their stiffness
- Helps researchers
understand the structural properties of cartilage.
3. Knee Joint Test Fixtures
- MTS servo-hydraulic testing machine
can be fitted with multiple fixtures to produce realistic loads
and movement of the knee to study injuries including tearing of
the anterial cruciate ligament.
- Fixtures can be used
to study tibiofemoral compression, internal tibial torsion, hyperextension,
and valgus bending.
- The loads and reactions
can be measure by the MTS testing machine, and markers may be
applied to use Vicon Motion analysis to measure kinematics of
the simulated motion.
4. Simulated Ankle Injury due to Torsion
- Utilizes the MTS Servo-Hydraulic testing
machine and the Vicon Motion capture system.
- Used to produce
external rotaion in an ankle to put realistic strains on the
ligaments and tendons at the joint.
- Tool for studying
the failure characteristics, including angle of rotaion and
torque, of the ankle.
6. Pediatric Skull
Fracture Testing Fixtures
- Two testing fixtures
were used to model pediatric skull fructure with porcine skulls
- Both fixtures was
used to model fracture of blunt force
impact while the skull was fixed, by dropping the trolley onto
- The fixtrues were also used to drop the
skulls by fixing them to the drop trolley to model fracture
patterns of impact after free fall.
- The main differnce
between the two fixtures was the height of the fall, one representing
high energy impact and the shorter representing a lower energy
- Helps researchers
compare skull fracutre patterns to the mode of fracture
- A custom-designed
four-point bendinge fixture was created to study the mechanical
porperties of the bone.
High Energy Impact Fixture
Attn: Dr. Roger Haut
East Fee Hall
965 Fee Road, Room A-407
East Lansing, MI 48824
by MSU OBL.
All Rights Reserved.