Effect of intramedullary nail stiffness on load-sharing in tibiotalocalcaneal arthrodesis: A patient-specific finite element study.

Tibiotalocalcaneal (TTC) arthrodesis is a procedure to treat severe ankle and subtalar arthropathy by providing pain free and stable fusion using IM nails. These nails can be manufactured with multiple materials and some feature the ability to dynamize the arthrodesis construct. However, the impact of IM nail material and nail dynamization on load-sharing and in the setting of bone resorption have not been quantified.

Circumflex Accessory Branch of the Superficial Fibular Nerve: An Unusual Cause of Nerve Entrapment.

The superficial fibular (peroneal) nerve traditionally courses through the anterolateral deep leg and pierces the deep crural fascia at the lower leg to divide into its terminal branches. Entrapment of the superficial fibular nerve is most commonly documented to occur at where it pierces the deep fascia, and numerous etiologies causing entrapment are described. In this case report, we describe an unusual cause of entrapment from a tertiary branch of the superficial fibular nerve taking a circumflex course and wrapping around the secondary branch of the main nerve.

Synovial chondromatosis of the ankle joint: 2 cases treated by open arthrotomy and synovectomy.

Synovial chondromatosis is a rare condition consisting of metaplasia of the synovial tissue that usually presents in large joints such as the knee and hip. The reported occurrence of synovial chondromatosis in the foot and ankle joints is rare in the literature. In this case report, the successful surgical management of two patients presenting with this condition using open ankle arthrotomy & synovectomy is described.

Human placental membrane as a wound cover for chronic diabetic foot ulcers: a prospective, postmarket, CLOSURE study.

Objective: To evaluate the safety and efficacy of a chorioamniotic allograft, used as a wound cover for chronic foot ulcers, in patients with diabetes.

Methods: A multicentre, prospective, postmarket study where eligible patients received up to 11 weekly wound cover applications. Computerised planimetry was used to calculate the diabetic foot ulcer (DFU) area each week.

Finite element analysis of a pseudoelastic compression-generating intramedullary ankle arthrodesis nail.

Tibio-talo-calcaneal (TTC) arthrodesis is an end-stage treatment for patients with severe degeneration of the ankle joint. This treatment consists of using an intramedullary nail (IM) to fuse the calcaneus, talus, and tibia bones together into one construct. Poor bone quality within the joint prior to surgery is common and thus the procedure has shown complications due to non-union.

Pseudoelastic intramedullary nailing for tibio-talo-calcaneal arthrodesis.

Tibio-talo-calcaneal (TTC) arthrodesis is a procedure to treat severe ankle arthropathy by providing a pain-free and stable fusion. Intramedullary (IM) nails offer a method of internal fixation for TTC arthrodesis by providing compressive stability, as well as shear and torsional rigidity. IM nails have been developed to apply compression to the TTC complex during installation; however, current designs are highly susceptible to a loss of compression when exposed to small amounts of bone resorption and cyclic loading.

Compression forces of internal and external ankle fixation devices with simulated bone resorption.

Background: Internal and external fixation techniques have been developed to provide rigidity and stability to a fusion site such as in tibiotalocalcaneal (TTC) arthrodesis. Compression of the fusion site plays an integral role in primary bone healing, though little work has been done to quantify the compressive force values of ankle fixation devices.

Materials And Methods: Using synthetic and cadaveric bone models, a Newdeal/Integra PantaNail and DePuy VersaNail were tested as compressive intramedullary (IM) nails while an Encore True/Lok and an Ace-Fischer frame were tested as external fixators.

Demineralized bone matrix: basic science and clinical applications.

Bone grafting with demineralized bone matrix (DBM) is useful in reconstructive surgery to ultimately provide anatomic alignment, restore function, or augment/change the biomechanics of the foot and ankle. DBM should be used in conjunction with a transplant or implant displaying mechanical strength. DBM can augment cortical grafts used for bridging gaps or defects and lengthening procedures by increasing the connectivity of the structural graft with the host bone.