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All Presentations

  • How Transverse Plane Elastic Strain Energy In The Hip Affects Gait

    Kevin A. Kirby, DPM, demonstrates how the hip joint can store and release elastic strain energy. When a patient is lying completely relaxed in a supine position, manually rotating the hip into an internally rotated position and then releasing the lower extremity shows how the hip joint may store and release transverse plane elastic strain energy. When the capsular ligaments and muscles that cross the hip joint are stretched by internal hip rotation, these soft tissue structures will store elastic strain energy or potential energy. When the limb is suddenly released, the stored elastic strain energy is converted into kinetic energy that causes a rapid external rotation acceleration of the thigh, leg and foot due to rapid shortening of these ligaments and muscles. This storage and release of transverse plane elastic strain at the hip is an important contributor to the gait phenomenon known as abductory twist. With the abductory twist, rapid external rotation of the foot occurs at the time of heel off in individuals whose hip has been excessively internally rotated during the late midstance phase of gait by excessive pronation of the subtalar joint. Elastic strain energy is also an important energy conservation mechanism in many forms of animal locomotion.

    For a related video on the abductory twist, see http://www.podiatrylive.com/_biomechanical_abductory_twist .

  • A Closer Look At The First MPJ Arthrodesis

    Patrick DeHeer, DPM, FACFAS, offers essential step-by-step pearls on performing a first MPJ arthrodesis. Since he started using dorsal locking plates, Dr. DeHeer notes that he has seen fewer complications than in the past with this procedure.

    Dr. DeHeer is a Fellow of the American College of Foot and Ankle  Surgeons, and is a Diplomate of the American Board of Podiatric Surgery. He is also a team podiatrist for the Indiana Pacers and the Indiana  Fever. Dr. DeHeer is in private practice with various offices in Indianapolis.

    For a related article from Podiatry Today, see “Point-Counterpoint: Are Locking Plates Necessary For First MPJ Fusion?” from the June 2011 issue at http://www.podiatrytoday.com/point-counterpoint-are-locking-plates-necessary-first-mpj-fusion .

  • A Closer Look At The Anchorage™ MTP CP Plate And Anchorage™ Lapidus CP Plate

    In this informative product presentation video, Stryker/Memometal Inc. (MMI) presents demonstrations of the latest additions to its line of Anchorage™ Plating Systems. The Anchorage™ MTP CP Plate is designed to treat severe hallux valgus and hallux rigidus of the great toe. The Anchorage™ Lapidus CP Plate is designed to correct severe hallux valgus deformities.

  • How To Remove External Fixation

    Patrick DeHeer, DPM, FACFAS, offers pertinent insights on the removal of multiplanar and uniplanar external fixation from a patient who was treated for a non-union of medial column fusion and a non-union of the calcaneal-cuboid fusion.

     

    Dr. DeHeer is a Fellow of the American College of Foot and Ankle Surgeons, and is a Diplomate of the American Board of Podiatric Surgery. He is also a team podiatrist for the Indiana Pacers and the Indiana Fever. Dr. DeHeer is in private practice with various offices in Indianapolis.

  • Proper Casting For A Standard Richie Brace Using The STS Casting Sock

    Doug Richie, Jr., DPM, FACFAS, discusses and demonstrates the proper casting technique for a standard Richie Brace using the STS Casting Sock.

    Dr. Richie is an Adjunct Associate Professor in the Department of Applied Biomechanics at the California School of Podiatric Medicine at Samuel Merritt College. He is a Fellow and Past President of the American Academy of Podiatric Sports Medicine. Dr. Richie is a Fellow of the American College of Foot and Ankle Surgeons, and is in private practice in Seal Beach, Ca.

  • How To Add A Shoe Lift To Help Address Leg Length Discrepancies

    David J. Levine, DPM, CPed, provides a how-to guide for adding a shoe lift to help patients with leg length discrepancy.

     

    Dr. Levine is a Fellow of the American Society of Podiatric Surgeons, and the American Academy of Podiatric Sports Medicine. He is in private practice, and is the director and owner of the Frederick, Md.-based Walkright and Physician's Footwear, a comprehensive pedorthic facility. For more information or to contact Dr. Levine, visit www.Levinefeet.com .

  • A Closer Look At The Subtalar Joint Axis Locator

    Kevin Kirby, DPM, demonstrates the use of the subtalar joint axis locator, which he designed with Simon Spooner, PhD, in 2005. Dr. Kirby notes the subtalar joint axis locator may be beneficial in accurately assessing the spatial location of the subtalar joint axis during both weightbearing and non-weightbearing function of the foot. Dr. Kirby says future experimental work may further illustrate the important biomechanical significance of the spatial location of the subtalar joint axis upon the kinetics of the foot and lower extremity during weightbearing activities, and how abnormalities in subtalar joint axis location can create abnormal biomechanics that lead to various pathologies within the foot and lower extremity.

     

    Dr. Kirby is an Adjunct Associate Professor in the Department of Biomechanics at the California School of Podiatric Medicine at Samuel Merritt University. He is the Director of Clinical Biomechanics at Precision Intricast, Inc., and is in private practice in Sacramento, Ca.

  • Understanding The Biomechanical Impact Of The Abductory Twist

    Kevin Kirby, DPM, discusses the biomechanical impact of the abductory twist, a sudden abduction motion of the foot which occurs at the time of heel-off during walking gait. The abductory twist is a relatively common gait abnormality, which occurs when the naturally occurring external motion of the pelvis above the foot during late midstance is not being matched by corresponding subtalar joint supination and tibial external rotation during late midstance.

     

    Dr. Kirby is an Adjunct Associate Professor in the Department of Biomechanics at the California School of Podiatric Medicine at Samuel Merritt University. He is the Director of Clinical Biomechanics at Precision Intricast, Inc., and is in private practice in Sacramento, Ca.

  • Key Insights On The Austin-Akin Bunionectomy

    Patrick DeHeer, DPM, FACFAS, provides step-by-step pearls and insights with his video demonstrating the Austin-Akin bunionectomy.

     

    Dr. DeHeer is a Fellow of the American College of Foot and Ankle Surgeons, and is a Diplomate of the American Board of Podiatric Surgery. He is also a team podiatrist for the Indiana Pacers and the Indiana Fever. Dr. DeHeer is in private practice with various offices in Indianapolis.

  • A Guide To The Calcaneal Scarf Osteotomy

    Lowell Weil, Jr., DPM, MBA, FACFAS, shares intra-operative pearls and insights on the calcaneal scarf osteotomy, a procedure which is usually utilized to correct problems associated with posterior tibial tendon dysfunction.

     

    Dr. Weil is the Fellowship Director of the Weil Foot and Ankle Institute (see http://www.weil4feet.com/ ) in Des Plaines, Ill. He is a Fellow of the American College of Foot and Ankle Surgeons, and the team podiatrist for the Chicago White Sox. Dr. Weil is also a Past President of the International Society of Medical Shock Wave Therapy (www.ismt.com ) and was the first podiatric physician to hold this office.