In the age of minimalist shoes and shoe makers such as vibrim, et al now concentrating on looks vs function, we are seeing a good amount of posterior tibial tendon injuries from mild to severe. The posterior tibial tendon is a very important tendon that is the major supinator (holds up the arch) of the foot about the ankle. When this tendon is injured inflammation starts, chronic inflammation can lead to tears and flattening of the arch. There is a zone of hypovascularity behind the big ankle bone called the medial malleolus, this is where most tears are located. For some reason theres is the area of less bloodflow to the tendon. Other areas of tearing and inflammation is where this tendon inserts into the navicular bone or to an accessory (extra) navicular bone called the os tibialis externum. Chronic inflammation and tears can lead to a progressive flattening of the arch. Hence one of our most common complaint is:" Doc my arch is falling and my ankle hurts." Another complaint is the inability or difficulty in walking up the stairs. Ideally, we would like to see patients before the arch starts falling, once that process has started the tendon is already compromised.
By MRI criteria the grading system as follows
Grade I: inflammation
Grade II: partial tears
Grade III: Rupture
Grade I: Inflammation
Grade II: partial tears
Grade III: Compromise of tendon with flexible collapse
Grade IV: Rigid flat foot deformity with compromised tendon
- Immobilization with a boot or brace until tendon calms down
- Physical therapy to strengthen the tendon and induce blood flow to the tendon
- Orthotic therapy from your podiatrist or orthotist for mild to moderate cases
- Gold standard for moderate to severe cases is the Ankle Foot Orthosis (AFO) which limited the ankle's pronation or flattening of the arch. AFO such as a Richie, Arizona, Colorado, Stepwell, etc type braces.
- TENS unit
Lateral column lengthening such as an Evan's calcaneal osteotomy where we place a bone wedge on the outside to bring the foot back under the ankle. This is the only procedure that can correct in all three planes of the foot. This is a very powerful procedure for adult acquired flat foot where the toes all point outwards in the typical "too many toes sign," when seen from behind.
NERD ALERT! The Evan's is the only flat foot procedure that can correct in all 3 planes (views) hence it is a very powerful / useful procedure.
|Preoperative eval for an Evan's Calcaneal Osteotomy. Notice the red line forming the angle the foot is collapsed with increased Calcanceal Cuboid joint angle. Greater than 5 degrees is abnormal on this view. |
|Post operative view 7 months later shows the proper alignment and a more normal looking foot. Notice the darkened wedge in the heel bone. Problem solved at FFLC.|
Medial calcaneal osteotomy where the heel bone is cut and shifted medially (inside) to realign the heel under the ankle joint. This comes in handy when there is a deformity of the heel bone itself or when the Evan's calcaneal osteotomy was not sufficient to correct the deformity. Below shows a case of double calcaneal (Evan's and the medial calcaneal slide) osteotomy used to fix an adult acquired flat foot deformity.
|Preop notice how the foot goes out|
|After notes how the foot is now straight.|
|Preop of the same patient different view showing the collapse|
|Post op lateral view showing both osteotomies stabilized and the hindfoot well aligned.|
Triple /double arthrodesis where we fuse 2 to 3 major hindfoot joints to create stability. Recent studies found this procedure to have the most satisfaction rating amongst patients. I would agree with this when used for Grade III or IV deformities, or if the patient is obese. Below you will notice the before photo of the ankle with the arch collapsed. The bottom shows the proper alignment of the joints with the arch restored. More often then not, an achilles tendon lengthening would be required as an adjunct to this procedure.
|Case #1 : Preoperative Double Arthrodesis with collapsed foot.|
|Case #1 Post op with fixation intact and foot in proper alignment|
|Case #2 Preop Triple Arthrodesis Procedure, notice the collapse and arthritic formation circled in red. Patient had severe pain and collapse|
|Case #2: Post operative Triple Arthrodesis 3 years later without pain in the ankle or foot.|
Tendon transfers may also be done. There is a tendon behind the posterior tibial tendon, flexor digitorum longus) that can be easily transferred forward, or used to replace the entire posterior tibial tendon. Usually the tendon used is the flexor digitorum longus which is right behind the posterior tibial tendon.
The choice of surgical intervention can be a combination of those above. Your surgeon should have preferences from their past experiences. Beware of surgeons who only do this or only that procedure for PTTD. Different stages of the deformity requires different procedures and your surgeon should have experience with treating various stages and treatment protocols for each.
Custom orthosis usually a UCBL type of orthosis
Proper shoes with proper support such a new balance line with rollbar
Avoid heavy workout in minimalist shoes.
In stage one of this disease which is just tendonitis without any collapse or tendon weakness, stem cell injections into the posterior tibial tendon can help regeneration of the tendon without the need for surgery. Most of the time, a CAM boot may be required after the injection for up to 6 weeks to allow for proper tendon healing. www.topstemcell.com
Dr. Kevin Lam
Clinical Director of FFLC
Naples, FL 34102
239 430 3668 option 2 for schedling.
Pre and Post Operative photos are actual patients of Dr. Kevin Lam
Choosing the right surgeon for these complex cases can mean a difference of painfree living vs a lifetime of disability. All rights reserved. You may not use these pictures without written permission of Dr. Kevin Lam
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