Dynamische Pedographie zur Abklärung der funktionellen Sprunggelenkinstabilität

Abstract

Chronic functional instability of the lateral ankle may be difficult to distinguish from mechanical instability when radiological stress test reveal only small ligamentous defects. When a decision for or against surgical reconstruction of the ligaments has to be made it can be helpful to use additional information on joint function. Therefore, a prospective study of 65 patients (mean age 24.1 +/- 4.6 years) with long-standing chronic ankle instability was conducted to demonstrate that the dynamic measurement of plantar pressure distribution can identify patients with functional ankle instability. Plantar pressure patterns were measured during gait by means of a capacitive platform, the EMED-SF system. The impulses at eight points of the foot were calculated intraindividually and compared with those in a group of 100 healthy subjects. On the basis of clinical criteria alone, the two groups of patients were distinguished, 35 with functional instability and 30 with mechanical instability. The patients with functional instability showed significantly increased lateral loading of the unstable foot (P = 0.01), whereas the group with mechanical instability tended to walk more on the medial side of the unstable foot. This finding is explained by a deficit or peroneal strength during the stance phase, based on a proprioceptive deficit after trauma. The new technique provides additional information, which is relevant and sufficiently important to help in making decisions about the individual patient with chronic instability.

Effects of Wearing Different Personal Equipment on Force Distribution at the Plantar Surface of the Foot

“…A variety of techniques are available for the detection of different load patterns. Pedobarography is a method for analysing the distribution of pressures and forces and thus allows specific changes in foot biomechanics and gait to be identified [8, 10]. In the present study, we could show that the wearing of greater weights and thus an increase in load led to changes in the distribution of pressures and forces on the sole of the foot.…”

“…These changes can be detected with pedobarography. Using this method, Becker et al identified different parameters of ankle instability [8]. Likewise, patellofemoral pain syndrome can also be associated with biomechanical dysfunction of the rolling movement of the foot [9].…”

Relationship between gait biomechanics and inversion sprains: a prospective study of risk factors

“…These findings are probably due to methodological differences. In the study of Beckers et al [30], the heel region was divided into three areas in contrast to the present study, where only two areas were defined.…”

“…It is possible that, while walking or running on uneven ground, ankles at risk of a sprain are less able to accommodate changes in the surface as well as controls can. Becker et al [30] measured plantar pressure distribution during gait in subjects with functional and mechanical ankle instability. They found a significantly higher impulse underneath the lateral side of the heel in subjects with functionally unstable ankles.…”

Comparison of distal versus proximal-distal kinesio taping effects on gait initiation profile in athletes with functional ankle instability

“…Becker and his colleagues measured the foot pressure distribution during walking in people with functional instability and mechanical ankle instability. They found more impulse under the external part of the heel in the ankles with functional instability but in the ankles with functional instability, no difference was observed in the heel area (20). These findings are probably due to methodological differences and the difference in the division of the heel into different areas.…”