additive manufacturing (3d printing)alliedhealth.ouhsc.edu/portals/1058/assets/cahsa fall 2017...
TRANSCRIPT
ADDITIVE MANUFACTURING (3D PRINTING)AND ITS USE IN ALLIED HEALTH PROFESSIONS
BRADFORD GILDONASSISTANT PROFESSORDEPT. OF MEDICAL IMAGING AND RADIATION SCIENCES
WHAT IS ADDITIVE MANUFACTURING?
• Rapid prototyping
• 3D printing
• Method of manufacture where layers of material are built up to create solid object
• CAD to STL; STL to G-Code; Print!
• Removal of prints from bed
• Post-processing often required
PREVIOUS INDUSTRY USE
• Mainly used for rapid prototyping and concepts/design in engineering, etc.
Number of printers under $5,000 sold globally per year – Wohlers report 2015
CONSUMER LEVEL PRINTING
• Miniatures for D and D and character game use
• Cartoon characters and knick-knacks
• Cosplay and Props
USEFULNESS…IN HEALTHCARE?! ALLIED HEALTH APPLICATIONS
MEDICAL IMAGING USE
SURGICAL APPLICATIONS
TYPES OF PRINTERS – MATERIAL EXTRUSION FDM/FFF(FUSED DEPOSITION MODELING / FUSED FILAMENT FAB.)
• Method of action• Melts filament; glue gun
• Materials used• Thermoplastic materials • PLA, ABS, PC, Nylon, etc.
• Cost of printer• $ - $$• $150 - $10,000
• Applications• Quick, cost effective for non-functional prototypes, planning models, etc.
TYPES OF PRINTERS – PHOTOPOLYMERIZATION SLA / DLP(STEREOLITHOGRAPHY / DIRECT LIGHT PROCESSING)
• Method of action• Photopolymerization – resin undergoes photo stimulation, chemical reaction hardens it
• Materials used• Photopolymer resin
• Cost of printer• $$ - $$$
• $3,000 - $15,000
• Applications • Parts with fine details, smooth finishing surface
• Jewelry, investment casting and dental/medical applications
TYPES OF PRINTERS – POWDER BED FUSION SLS / SLM(SELECTIVE LAYER SINTERING / SELECTIVE LASER MELTING)
• Method of action• Thermal source induces fusion between powder particles
• Materials used• Lasers and electron beams
• Plastics and metals
• Cost of printer• $$$ - $$$$
• Applications• Design freedom (no support) for complex geometries
• High strength and stiffness
TYPES OF PRINTERS – MATERIAL JETTING NPJ / DOD(NANO PARTICLE JETTING / DROP ON DEMAND)
• Method of action• Compared to 2D ink jetting process
• Materials cure/harden when exposed to light or high temps
• Materials used• Photopolymers, metals, or wax
• Cost of printer• $$$$
• Applications• Realistic prototypes, excellent high detail and high accuracy
• Multiple materials and colors in one print
FILE TYPES AND SOFTWARE• .STL
• Stereolithography file; standard triangle language; standard tessellation language
• .OBJ• Geometry file, similar to STL
• CAD • several types; often proprietary to software
• DICOM • Digital imaging and communication in medicine
• .NRRD• Nearly raw raster data
• .MIX• Meshmix document; image exchange file containing vectors or raster graphics
• .gcode (G-code)• Generic term for control langue of CNC or RepRap machines; controls print speed, movement, flow, etc.
APPLICATION IN MEDICAL IMAGING
• Software INTENSE!
• Phantom
• CT exam DICOM data
• DICOM Slicer program .NRRD
• .NRRD Segmentation software (Democratize3d, Amira, Avizo, etc.) .STL
APPLICATION IN MEDICAL IMAGING• Import into slicing program (Simplify 3D,
Slic3r, ideaMaker, MatterControl, etc.)
• Make edits to print orientation, support/scaffolding structures, layer thickness, infill, etc. .gcode
• .gcode Print!
MIRS ADDITIVE MANUFACTURING AND 3D PRINT LAB
• Printing of:• Model for anatomical teaching / understanding
• Anatomical models for surgical planning
• Sterilizable, surgical cutting and drilling guide models
• Prototypes for research / development
• Instruction of students in all aspects of image acquisition, data/file conversion and manipulation, and printing
• Printer acquisition this fall; functional lab in early spring 2018 for both teaching and printing
INTERESTED – WANT YOUR OWN PRINTS?
• http://library.ouhsc.edu/3dprintpolicies
• No investment needed!
• Library has 2 printers for education prototype and even personal use!
• For class or educational item; free
• For personal use, $2 setup fee plus cost of filament
GET INVOLVED!
• 3D Printing Special Interest Group (SIG)• Available on D2L; can add yourself
• Meets weekly, Thursdays, @ 4:00 pm in the north end of the CAH atrium
• Discuss various projects from week to week, or answer questions and share info
RESOURCES
• www.3DHubs.com – excellent resource for info on 3D printing technology, specificprinters, materials, and more
• www.tinkercad.com – introductory CAD software for creating ones own objects to print
• www.thingiverse.com – repository of ready-made .stl and .obj files
• www.myminifactory.com – second place for ready-made .stl and .obj files
• www.embodi3d.com – biomedical 3D printing community with medical .stl files, tutorials, and forums
• www.ou.edu/innovationhub.html Innovation Hub (in Norman)
PREVIOUS PRINTSTEXAS TORTOISE
PREVIOUS PRINTSROTHCHILD’S GIRAFFE
PREVIOUS PRINTSPELVIS PHANTOM
PREVIOUS PRINTSHEART WITH AXIAL SEGMENTATION
PREVIOUS PRINTSRESOLUTION OF STRUCTURES
PREVIOUS PRINTSFUN!