OBJECTIVE Ankle joint complex dynamics developed during volleyball spike jumps take-offs and landings were quantified to assess potential relations between these joint dynamics and patellar tendinopathy. DESIGN Three-dimensional kinematic data provided information about movements of the lower limbs, while the kinetic data permitted analysis of ground reaction forces as players took-off and la...

BACKGROUND Numerous biomechanical studies of the lateral ankle ligaments have been reported; however, the isolated function of the calcaneofibular ligament has not been clarified. We hypothesize that the calcaneofibular ligament would stabilize the ankle joint complex under multidirectional loading, and that the in situ force in the calcaneofibular ligament would change in each flexed position....

OBJECTIVES External ankle support has been successfully used to prevent ankle sprains. However, some recent studies have indicated that reducing ankle range of motion can place larger loads on the knee. The aim of this study was to investigate the effect of external ankle support (braces and high-top shoes) on the ankle and knee joint loading during a netball specific landing task. DESIGN A r...

Ankle fractures are common representing up to 10% of all fractures with an incidence that is rising. Both conservative treatment and operative management of ankle fractures can lead to excellent outcomes. Neurovascular injuries are uncommon but can be a source of significant morbidity and associated poor outcome. The superficial peroneal nerve (SPN) in the lateral approach and the sural nerve i...

When one is surgically managing an unstable ankle fracture, anatomic reduction of the syndesmosis is typically accomplished using an open surgical approach. We propose an arthroscopically assisted technique that restores normal anatomy while using a percutaneously placed intramedullary nail to fix the fibula. The patient is positioned supine, and the ankle is placed under traction by use of a t...

Anatomic reduction and fixation of unstable ankle fractures is necessary to prevent posttraumatic arthritis. Malunion of the distal fibula in unstable ankle fractures may lead to progressive talar instability. Ankle fracture malunions often present with concomitant syndesmotic widening, which can cause surgeons to overlook changes in fibula length and rotation. The decision to proceed with surg...

Objective To evaluate the postoperative results of patients with supination-external rotation ankle fractures who underwent syndesmotic screw (SS) removal. Methods Retrospective cohort study assessing the late postoperative results of 35 patients operated from January 2013 to June 2015. Patients undergoing treatment of rupture of the distal tibiofibular syndesmosis with SS fixation and who di...

Compared with active prostheses, passive compliant ankle prostheses offer the advantages of reduced energy consumption, a lighter weight, simple structure, and lower costs. However, although various commercial products are available, these designs do not provide adequate degrees freedom (DOFs) for movement. This paper presents ankle–foot prosthesis (CPAF) capable 2-DOF rotation during locomotio...

OBJECTIVES this study was aimed to test the hypothesis that ankle proprioception assessed by custom-designed proprioception testing equipment changes with ageing in men and women. METHODS ankle proprioception was assessed in 289 participants (131 women) of the Baltimore Longitudinal Study of Aging (BLSA); the participants aged 51-95 years and were blinded during testing. RESULTS the average...

The standard method used to calculate the ankle joint power contains deficiencies when applied to dynamic elastic response prosthetic feet. The standard model, using rotational power and inverse dynamics, assumes a fixed joint center and cannot account for energy storage, dissipation, and return. This study compared the standard method with new analysis models. First, assumptions of inverse dyn...