Knee Replacement Options
(The Attune Knee)
By: Brian Myette
BME 281
Section 2
The Problem/Background
• Complete Knee replacement surgery is the most
common joint replacement procedure.
• Osteoarthritis- As one ages, inflammation forms
in the join, OA is the end result of extreme
inflammation in the knee.
• Rheumatoid Arthritis- A disease that effects both
of the knees. Can happen at any ages. It destroys
the cartilage in the knee.
• Post-traumatic Arthritis- Very common in
athletes. Happens due to injury in the knee
ligaments, femoral fracture, or Meniscus tear.
Cont…
Studies have shown higher incidence
of anterior knee pain in
unresurfaced patellae due to
replacement surgery.
The Goal of engineers is to produce a
knee system with a “patella
friendly” Femoral component.
The Study
• Evaluate the mechanics of the
unresurfaced patella. This was
compared with natural and
resurfaced motion conditions of
the patellofemoral joint.
• It tested the kinematics of the
implant, and it strain on the
patella.
History
• 1891 German surgeon Theophilus Gluck performed knee
replacement using Ivory to replace the joint. The ivory joint
was connectedand stabilized using plaster.
• In 1974,researchers at Mass Gen developed "total condylar
knee," a plastic component that resembled the traditional
knee structure and allowed for total joint replacement with
limited motion.
• In the 1980’s the concept of “moble-knee Replacement” was
coined. The component was not completely fixed, which
offered for more motion and higher angle of knee flexion.
• In the Early 90’s The LCS and Sigma knees were designed.
These models focused on eliminating the strain on the patella
after surgery, without taking away from the knee flexion
ability.
• 2011- The First Attune knee was used in surgery, and was
extremely sucessful. The patient had full control and 90
degrees on flexion in the knee within 2 weeks.
The Attune Knee
• The Attune knee is ideal for patients with Painful
and disabled knee joint resulting from
osteoarthritis, rheumatoid arthritis, traumatic
arthritis where one or more separations in the
joint are involved.
• The implant also can be used to correct varus,
valgus, or posttraumatic deformity
• The implant has more anatomic geometry, with a
deep patellar groove and a wider lateral ridge
ATTUNE Advancements
• Match the anatomy of virtually any knee found in
a person, because it is designed and tested based
on size and shape of the knee, and the gender
and ethnicity of the patient.
• It is made of a unique polyethylene plastic insert
which should create the longest lasting and
strongest insert ever created.
• This insert and the larger perfect area for the
patella provides for greater range of motion and
significantly quicker recovery.
Future
• New Materials- metals and plastic
components.
• Computer systems used in surgery to
“improve” the quality of surgery, and decrease
the percent of patients that need corrective
surgery.
Works Cited
Advocate Lutheran General Hospital. "World’s First Attune Knee Replacement Completed at Advocate Lutheran General
Hospital." Triblocal.com. N.p., 3 Jan. 2012. Web. 27 Oct. 2012. <http://triblocal.com/parkridge/community/stories/2012/01/world%E2%80%99s-first-attune-knee-replacement-completed-at-advocatelutheran-general-hospital/>.
Cluett, Jonathan. "Considering Knee Replacement Surgery?" About.com Orthopedics. N.p., 8 Apr. 2012. Web. 27 Oct.
2012. <http://orthopedics.about.com/od/hipkneereplacement/tp/kneereplacement.htm>.
"Arthritis of the Knee - OrthoInfo - AAOS." Arthritis of the Knee - OrthoInfo - AAOS. N.p., n.d. Web. 27 Oct. 2012.
<http://orthoinfo.aaos.org/topic.cfm?topic=a00212>.
Fitzpatrick, Clare K., and Paul J. Rullkoetter. "Influence of Patellofemoral Articular Geometry and Material on Mechanics
of the Unresurfaced Patella." Journal of Biomechanics45.11 (2012): 1909-915. Http://www.sciencedirect.com. JulyAug. 2012. Web. 27 Oct. 2012. http://www.sciencedirect.com/science/article/pii/S0021929012002977
"Depuy Attune Total Knee System by Johnson & Johnson." Depuy Attune Total Knee System by Johnson & Johnson. N.p.,
n.d. Web. 27 Oct. 2012. <http://www.clarimed.com/device/depuy-attune-total-knee-system>.
Beach, Emily. "History of Knee Replacement." EHow. Demand Media, 21 July 2009. Web. 27 Oct. 2012.
<http://www.ehow.com/about_5201708_history-knee-replacement.html>.