Birger Valen

11.06.2013: Dislocation tendency or instability is a key quality indicator for hip replacement surgery. After prosthesis failure, dislocation is the most common major complication from such surgery, and is most likely an increasing problem (1). As opposed to failure, dislocation occurs a short time after the...

28.05.2013: Scaphoid fracture of the wrist is a common condition, and by far the most common carpal bone fracture (1). The cause is almost always a fall onto an outstretched arm with dorsal flexion and radial deviation of the wrist (Fig. 1). The problem is slow healing because of the poor blood supply, and risk...

29.01.2009: Scaphoid fractures of the wrist are common and represent by far the most usual fracture of the carpal bone. The carpus contains seven other bones that can also break. Such injuries are rare but should be considered in the event of injury or pain in the wrist. The fractures can show all degrees of...

23.10.2008: Climate change, presumably caused by humans, has been observed during the past decade. The change may have health effects due to an increase in radiation through the atmosphere, a change in the spread of infectious diseases, a shortage of food and clean water, and natural disasters. The mechanisms...