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PURPOSE Patellofemoral instability is influenced by ligamentous, boney and neuromuscular factors. The most important variables are trochlea geometry, medial patellofemoral ligament (MPFL), patella height, tibial tuberosity-trochlea groove distance (TT-TG) and the extensor muscles. Treatment is complicated by these multifactorial conditions. This prospective(More)
PURPOSE The purpose of this study was to evaluate the benefits of computer navigation on tunnel placement during anterior cruciate ligament reconstruction. METHODS A prospective, randomized, controlled study comparing computer navigation with manual operation was performed between December 2003 and April 2004. We assigned 20 patients to the computer(More)
OBJECTIVE To evaluate the presupposed preventive residual mechanical effectiveness of the widespread use of adhesive elastic ankle tape after a nonlaboratory, realistic soccer-specific outfield intervention reflecting a soccer halftime. DESIGN A prospective nonrandomized test-retest design was used. SETTING Laboratory. PARTICIPANTS Seventeen(More)
BACKGROUND An increase in interstitial bony fluid occurs in bone-marrow edema (BME). The exact pathogenetic processes still remain unknown. BME is an unspecific finding that can occur on its own or accompany multiple diseases and pathologies. GOAL Literature review and presentation of new guidelines. MATERIAL AND METHODS This is a narrative literature(More)
Rotational alignment of prosthetic components after total knee arthroplasty (TKA) is predominantly monitored with computer tomography (CT), for example by relating the anatomical transepicondylar axis (a-TEA) of the native femur to the posterior bicondylar axis of the prosthetic component (PBCA). The purpose of the present study was to portray a reliable,(More)
PURPOSE Medial transfer of the tibial tubercle has become a standard procedure in cases of patella instability caused by an increased tuberositas tibae-trochlear groove (TT-TG) distance. However, the TT-TG distance has always been assessed as an absolute value without taking individual joint size into consideration. It was assumed that the pathological(More)
BACKGROUND To our knowledge, there are only a few prospective studies on the use of magnetic resonance imaging (MRI) to diagnose injuries associated with ankle sprains in children. We hypothesized that MRI examinations of acute ankle sprains in growing children would show relevant injuries that may have been overlooked by conventional clinical,(More)
PURPOSE In recalcitrant epicondylitis innumerable operative techniques have been published, nevertheless a certain percentage of patients remains symptomatic after operative treatment. We developed an individual, systematic diagnostic pathway including arthroscopic assessment of elbow stability to identify the optimal and respectively less invasive therapy.(More)
BACKGROUND Next to graft fixation, correct positioning of the tibial and femoral tunnel is a deciding factor for the clinical result of anterior cruciate ligament reconstruction surgery. Computer-assisted navigation has been proposed as a method to improve tunnel positioning. PURPOSE To examine the differences in tibial tunnel placement between cruciate(More)
Cervical muscles are commonly represented by line-of-action models. This investigation evaluates the performance of three types of model implementations, based on their ability to mimic geometric in-vivo aspects of muscles. Five prominent pairs of neck muscles were reconstructed in three head positions using magnetic resonance imaging. Based on the(More)