Minutes
9/11 Meeting:
-not sure about degradation
-chemical composition of polymer doesn't necessarily designate degradation
-thermal, crystalline characteristics contribute to degradation
-how to distribute load on bone and fixator
-Testing limitations
-Fracture type-->specificity
-Polyanhydrie or PLGA
-varying degradation
-Biodegradable Material
-Moment of Inertia over time --> modulus
-tension increases inside --> collapse
-outer radius becomes smaller --> define rate of degradation/collapsation
-decrease of polymer diameter
-string attachments--strings pull up as material degrades
-E or I can vary so use both, Change I is preferable
-control via electrical impulse--> pacemaker battery--> charge effects degradation
-several cylinders with different degradation
-Porous tantanum alloy
-filling pores with degradable material
-call zimmer for samples of biodegradable materials
-high density polyethylene --> flexible/ ability to change
9/25 Meeting:
-Polyprryoles-insulation of mechanical/electrical properties
Designs:
-Biodegradable 2 Plate Design:
-2 plates
-polymer in-between
-Springs pulling plates together
-screws provide strength
-possibly degrade certain screws
- Electrically Controlled Degradation:
-internal polymer degraded in electronically controlled fashion
-cover electronics in insulated polymer
Modeling:
-plates in pro-e
-bones (find online - IGES or international society of biomechanics website (ISB))
-strength (GPa)
-shape
-show stress profile of fixator on bone
10/9 Meeting:
Model Selection:
-Physiome Space
-registration problems
-formal approval?
-Approximation model
-cylinder?
-sawbones.com
-check for models
-for specific views of model
Materials:
-degradation rate of polymer
-compressive mechanism
-stainless steel
-easy to machine
-Guiding plates
-cylinders running through plates and polymer
Polymer:
-Mixture to aid in even degradation
Device:
-Modular
-inner plate connected to bone
-outer plate connected to inner plate via guiding plates + springs
-Springs and forces
Uniform Compression:
-Notches for uniform width
10/23 Meeting:
-Pricing of Magnetic
-uniform spreading of springs
-pins on plates for threading the springs
-metal doesn't have to be everywhere
-fixation mechanism
-materials
Divide Work:
-2 people fixation mechanism
-2 people variation mechanism
10/31 Meeting:
-dimensions
-force
calculations
F=-kx
F = Ee
-Approximate models/ forces diagrammed
11/6 Meeting:
Midterm Presentation:
-number
-layout
-overview slide
-need -->motivation
-decrease text size
-increase stat size
-cost of need
-Background
-picture of humerus
11/20 Meeting:
-SMP Manufacturers
-MIDE-smart materials consultants
-smart hydrogels
-Endoshape-SMP
-CRG-SMP
-not sure about degradation
-chemical composition of polymer doesn't necessarily designate degradation
-thermal, crystalline characteristics contribute to degradation
-how to distribute load on bone and fixator
-Testing limitations
-Fracture type-->specificity
-Polyanhydrie or PLGA
-varying degradation
-Biodegradable Material
-Moment of Inertia over time --> modulus
-tension increases inside --> collapse
-outer radius becomes smaller --> define rate of degradation/collapsation
-decrease of polymer diameter
-string attachments--strings pull up as material degrades
-E or I can vary so use both, Change I is preferable
-control via electrical impulse--> pacemaker battery--> charge effects degradation
-several cylinders with different degradation
-Porous tantanum alloy
-filling pores with degradable material
-call zimmer for samples of biodegradable materials
-high density polyethylene --> flexible/ ability to change
9/25 Meeting:
-Polyprryoles-insulation of mechanical/electrical properties
Designs:
-Biodegradable 2 Plate Design:
-2 plates
-polymer in-between
-Springs pulling plates together
-screws provide strength
-possibly degrade certain screws
- Electrically Controlled Degradation:
-internal polymer degraded in electronically controlled fashion
-cover electronics in insulated polymer
Modeling:
-plates in pro-e
-bones (find online - IGES or international society of biomechanics website (ISB))
-strength (GPa)
-shape
-show stress profile of fixator on bone
10/9 Meeting:
Model Selection:
-Physiome Space
-registration problems
-formal approval?
-Approximation model
-cylinder?
-sawbones.com
-check for models
-for specific views of model
Materials:
-degradation rate of polymer
-compressive mechanism
-stainless steel
-easy to machine
-Guiding plates
-cylinders running through plates and polymer
Polymer:
-Mixture to aid in even degradation
Device:
-Modular
-inner plate connected to bone
-outer plate connected to inner plate via guiding plates + springs
-Springs and forces
Uniform Compression:
-Notches for uniform width
10/23 Meeting:
-Pricing of Magnetic
-uniform spreading of springs
-pins on plates for threading the springs
-metal doesn't have to be everywhere
-fixation mechanism
-materials
Divide Work:
-2 people fixation mechanism
-2 people variation mechanism
10/31 Meeting:
-dimensions
-force
calculations
F=-kx
F = Ee
-Approximate models/ forces diagrammed
11/6 Meeting:
Midterm Presentation:
-number
-layout
-overview slide
-need -->motivation
-decrease text size
-increase stat size
-cost of need
-Background
-picture of humerus
11/20 Meeting:
-SMP Manufacturers
-MIDE-smart materials consultants
-smart hydrogels
-Endoshape-SMP
-CRG-SMP