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Workshop: Design for Additive Manufacturing Presented by Réseau Québec-3D, CME Canada Makes & McGill University
This half-day workshop will feature presentation from some of Canada’s leading experts in additive manufacturing (AM) and offer the chance to network with some of Canada’s AM professionals. The workshop’s goal is to help industry personnel understand one of the most important components of AM, designing for additive manufacturing DfAM.
Additive Manufacturing is changing your sector whether you like it or not, be ready!
It is no secret that AM is disrupting key sectors of Canada’s economy and Réseau Québec-3D and Canada Makes are working together to bring you the expertise and knowledge needed to help understand how you can use this powerful new technology to your advantage and be ready to adapt.
As usual, networking will be a primary focus of this workshop so we plan on including breaks and a networking lunch so you can ask questions face-to-face. Experts from Altair, Renishaw, Expanse Microtechnologies and the CRIQ will offer insightful discussions in their area of expertise. We look forward to seeing you there!
Sign up now as seating is limited.
Date: March 21, 2018
Time: 8 a.m. – 1:30 p.m.
Location: McGill University
Macdonald Engineering Building, Room 267
817 Sherbrooke Street West McGill University,
Montreal, Quebec H3A 0C3
Cost: $25 Réseau Québec-3D & CME Canada Makes Members
|8:00 – 9:00 a.m.||Registration and Networking coffee|
|9:00 – 9:30 a.m.||Welcome Remarks & DfAM||Fiona Zhao, McGill University|
|9:30 – 10:00 a.m.||Design for Additive Manufacturing||Altair|
|10:00 – 10:30 a.m.||Impact of new AM capability and adoption method/point||Félix-Etienne Delorme – Renishaw|
|10:30 – 10:45 a.m.||Networking Break|
|10:45 – 11:15 a.m.||Designing for metal AM||CRIQ|
|11:15 – 11:45 a.m.||CT Scanning||Expanse Microtechnologies|
|11:45 – 12:00 p.m.||Special announcement – Finalists Canada Makes 3D Challenge||Frank Defalco|
|12:00 – 1:30 p.m.||Networking lunch|
|1:30 – 2:30 p.m.||Canada Makes’ Additive Manufacturing Advisory Board (AMAB) AGM||Note: Only AMAB members|
Frank Defalco, Manager Canada Makes
McGill University is very excited about its recent acquisition of new equipment that greatly increases its additive manufacturing (AM) capabilities. Located in Prof. Mathieu Brochu’s laboratory at McGill in Montreal are now two new Renishaw laser powder bed units, an AM250 and an AM400.
“These units will be used to expand the boundaries of AM, particularly in the critical areas of processing of materials sensitive to cracking, microstructure control, and the relationship of the former to powder quality and chemical composition,” said Prof. Brochu. “Tapping into McGill’s existing expertise in pulse-based AM processing, the primary objective will be to open new AM opportunities for industry by providing new and higher performance AM alloys/parts.”
Moreover, installed in January and complementing the new 3D printing capability available is a new ZEISS Xradia 520 Versa 3D X-ray nano-CT scanner. McGill researchers and other institutions now have access to this powerful CT scanner. This technology has the capability to detect defects with a 700 nm special resolution with a minimum 70 nm voxel size, and is instrumental in helping to minimize defects using AM.
The Xradia 520 Versa is capable of non-destructive 3D submicron imaging. It can analyze a wide variety of solid and soft materials including rock, metal, polymers, glass as well as biological hard and soft materials such as stained or unstained tissue.
By Katherine Gombay – Some potentially good news for aging Baby Boomers: researchers believe that they have developed a hip replacement that will last longer and create fewer problems for the people who receive them than those currently in use. The secret? An implant that “tricks” the host bone into remaining alive by mimicking the varying porosity of real bones.
Interestingly, the key factor that distinguishes the new implant is that is LESS rather than more solid than those in current use, while still being just as strong.
Tricking bones into staying alive
Damiano Pasini, the man behind the design of the new hip replacement, points at the pyramid-like shapes visible on its surface. The implant is known as a femoral stem and connects the living femur with the artificial hip joint. “What we’ve done throughout the femoral stem is to replicate the gradations of density found in a real femur by using hollowed-out tetrahedra,” he explains. “Despite the fact that there are spaces within the tetrahedra, these forms are incredibly strong and rigid so they’re a very efficient way of carrying a load. Just think of the lattice-work in the legs of the Tour Eiffel.”
Pasini teaches mechanical engineering at McGill University and first started working on the concept for the implant more than 6 years ago. He smiles ruefully as he pulls earlier versions of the implant down from the shelves in his office to show how far he has come since then. He elaborates:
“So because the implant loosely mimics the cellular structure of the porous part of the surrounding femur, it can “trick” the living bone into keeping on working and staying alive. This means that our implant avoids many of the problems associated with those in current use.”
Indeed, the main problem with most implants is that because they are solid, or only porous on the surface, they are much harder and more rigid than natural bone. As a result, the implants absorb much of the stress along with the weight-bearing role that is normally borne by the living femur. Without sufficient stress to stimulate cell formation, the bone material in the living femur then becomes reabsorbed by the body and the bone itself begins to deteriorate and become less dense. This is one of the reasons that many implants become painful and need to be replaced after a time. It also explains why people often have difficulty if they have to have the same hip replaced a second time, because there simply isn’t enough normal, healthy bone to hold the implant in place.
It is a problem that orthopaedic surgeons are seeing more and more frequently.
Implants not so easy the second-time around
Dr. Michael Tanzer from the Jo Miller Orthopaedic Research Laboratory at McGill has been collaborating with Damiano Pasini for several years. “Because people engage in various sports where they may be injured more than they did in the past, we see younger people needing hip replacements more frequently,” says Dr. Tanzer. “And because people are also living longer, they often need to have the same hip replaced a second time. Unfortunately, I’ve seen many cases where people simply don’t have enough living bone for that to work easily. We are optimistic that this implant will reduce these kinds of problems.”
After successfully performing various tests on their implant, the researchers are so convinced that their femoral stem will work that they have already filed patents on it. They believe that because their current design is fully compatible with existing surgical technology for hip replacements it should be easier for the FDA to approve and surgeons to adopt.
Fits existing implant technology
In the meantime, Burnett Johnston, who started working with Damiano Pasini on developing the implants when he was a Masters student has now enrolled at McGill’s medical school.
His goal? To be the first person to actually implant one of these replacement hips once he qualifies as a surgeon and the new femoral stems have been fully tested, adjusted and accepted – something that Damiano Pasini estimates may happen in about three-five years’ time.
To read “Fully Porous 3D Printed Titanium Femoral Stem to Reduce
Stress-Shielding Following Total Hip Arthroplasty” by Sajad Arabnejad et al in The Journal of Orthopaedic Research, http://onlinelibrary.wiley.com/doi/10.1002/jor.23445/epdf
SOURCE – McGill University