Dr. Patrick Chin
BIO: Orthopedic Now
An active staff member of the Vancouver General and UBC Hospitals, Dr. Chin is also member of the Clinical Faculty in the Department of Orthopaedics at the University of British Columbia, with appointment to the Division of Joint Preservation and Arthroscopic Reconstructive Surgery. A fellow of the Royal College of Surgeons of Canada, he is also a member of the Canadian Academy of Sports Medicine and a candidate member of the American Association of Orthopaedic Surgeons. Dr. Chin is also a full Member of JOINTS Canada (Joint Orthopaedic Initiative for National Trials on the Shoulder).
Complementing Dr. Chin’s advanced surgical skills in arthroscopy and/or arthroplasty for shoulder, elbow and knee, is his special expertise in joint preservation and cartilage restoration, clinical outcomes research in shoulder, elbow and knee reconstruction surgeries and health practice economics in orthopaedic surgery.
A 1996 graduate of the Queen’s University Faculty of Medicine, Dr. Chin completed his residency in Orthopaedic Surgery there in 2001. He completed a one-year fellowship in Arthroscopy and Sports Medicine with emphasis on knee and shoulder reconstruction surgery at the University of Western Ontario in 2001. Dr. Chin completed a second fellowship in Adult Shoulder and Elbow Reconstruction Surgery at the Mayo Clinic in Rochester, MN in 2002, and received his Executive Masters of Business Administration from Queen’s University in 2009.
( Dr. Patrick Chin, Orthopaedic Surgeon, Vancouver, BC ) is in good standing with the College of Physicians and Surgeons.
What Are Commonly Used Shoulder Replacement Materials
What is Shoulder Arthritis
The new biomaterials that are used for shoulder replacement implants are no different than hip or knee replacement implants.
The metal that is used is known as cobalt chrome. There’s also other options such as titanium type metal.
In terms of the liner, or the plastic liner, it is usually known as a high molecular weight polyurethane material. Obviously the design and evolution of these biomaterials to improve longevity or survivability of these implants.
So the polyethylene material has had several different types of changes to it to increase the longevity. As far as the metal, the design part of it has been the most interesting.
When we first started with the first generation shoulder implants, they were stemmed with a hemisphere to the socket. It was a plain socket whether it was pegged or keeled. And now we are moving towards a stemless type implant to preserve bone on the humeral side. And on the socket side we tend to minimize the removal of bone so we’re going to more of a pegged implant versus a keeled implant.
And fortunately most of these implants can be cemented or uncemented. The standard treatment at this point is cemented glenoid component and uncemented stem component on the humeral side.
So the benefits of the uncemented material obviously makes the revision of these implants much easier. Meaning that if you had to remove it, it will be potentially easier to remove.
That’s not to be confused, however, with the newer metals now that are coming out and are supposedly more biologic so it enhances bone growing into the metal or acts like bone in essence. As you can imagine, if we had to remove that, that would be quite a chore – a challenge.
Longevity of these implants are 10 to 15 years. It’s really good. Anywhere between 80 and 90 percent survivability. The whole goal of improving design and materials is to improve the survivability of these implants that hopefully translates to long term affects for our patients meaning pain relief for a longer period of time and improved function for a longer period of time.
Local Practitioners: Orthopaedic Surgeon