Walking like a robot: do the ground reaction forces still intersect near one point when humans imitate a humanoid robot?

Bipedal walking while keeping the upper body upright is a complex task. One strategy to cope with this task is to direct the ground reaction forces toward a point above the centre of mass of the whole body, called virtual pivot point (VPP). This behaviour could be observed in various experimental studies for human and animal walking, but not for the humanoid robot LOLA.

Are large fracture trials really possible? What we have learned from the randomized controlled damage control study?

Purpose: Although they are considered the 'gold standard' of evidence-based medicine, randomized controlled trials are still a rarity in orthopedic surgery. In the management of patients with multiple trauma, there is a current trend toward 'damage control orthopedics', but to date, there is no proof of the superiority of this concept in terms of evidence-based medicine. The purpose of this article is to present unexpected difficulties we encountered in successfully completing our randomized controlled trial and to discuss the problematic differences between theoretically planning a trial and real-life practical experience of implementing the plan, with attention to published strategies.

[Validation of the Osteomyelitis Diagnosis Score on the Basis of a Retrospective Analysis of 100 Patients with Non-Union of the Tibia].

The accurate diagnosis of "osteomyelitis" is difficult and is often delayed. However, early and radical therapy of osteomyelitis is essential. The osteomyelitis diagnosis score (ODS) was developed to predict the probability of osteomyelitis.

Randomized, controlled, two-arm, interventional, multicenter study on risk-adapted damage control orthopedic surgery of femur shaft fractures in multiple-trauma patients.

Background: Long bone fractures, particularly of the femur, are common in multiple-trauma patients, but their optimal management has not yet been determined. Although a trend exists toward the concept of "damage control orthopedics" (DCO), current literature is inconclusive. Thus, a need exists for a more specific controlled clinical study.

[Hip arthroscopy after luxatio obturatoria. With contralateral unstable pelvic ring fracture].

Traumatic dislocation of the hip is a severe injury. Even in cases of an early uncomplicated repositioning there is a high risk of associated intra-articular injuries, such as lesions of the labrum, ruptures of the ligament of the head of the femur and loose bodies. The degree of damage caused by dislocation of the hip becomes apparent with a highly increased risk of developing postinjury osteoarthritis after dislocation of the hip.