Sven U. Scheffler

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First-time patellar dislocation typically occurs with twisting knee motions, during which the medial ligamentous stabilizers rupture, and the patella strikes against the lateral femoral condyle. The typical injury pattern is a tear of the medial patellofemoral ligament (MPFL) and bone bruises of the patella and the lateral femoral condyle. Additionally,(More)
There is still controversy about the optimal operative treatment of acromioclavicular (AC)-joint dislocations. However, in the current literature, only few studies are available on mid- to long-term results of different stabilization methods. This retrospective study presents the clinical and radiographical results after open reduction and stabilization of(More)
PURPOSE To mechanically test different reconstruction techniques of the anterior cruciate ligament (ACL) under incremental cyclic loading and to evaluate the impact of the level and method of graft fixation on tensile properties of each technique. TYPE OF STUDY In vitro biomechanical study. METHODS Four hamstring and 1 patellar tendon reconstruction(More)
Stress radiography presents the golden standard to quantify posterior laxity in posterior cruciate ligament (PCL) insufficiency. Several different techniques are currently available, but comparative data are insufficient. Different stress radiographic techniques result in different values for posterior laxity. Comparative controlled clinical study was(More)
BACKGROUND The role of anatomic risk factors in patellofemoral instability is not yet fully understood, as they have been observed in patients either alone or in combination and in different degrees of severity. PURPOSE To prospectively analyze rotational limb alignment in patients with patellofemoral instability and in controls using magnetic resonance(More)
Several grafts and several fixation techniques have been introduced for PCL reconstruction over the past years. To date, autograft and allograft tissues are recommended for PCL reconstruction, whilst synthetic grafts should be avoided. Autograft tissues include the bone-patellar tendon-bone graft, the hamstrings and the quadriceps tendon. Allograft tissues(More)
After reconstruction of the cruciate ligaments, replacement grafts have to undergo several phases of healing in the intra-articular graft region and at the site of graft-to-bone incorporation. The changes in the biological and mechanical properties of the healing graft in its intra-articular region are described as the ligamentization process. Significant(More)
We compared the mechanical behavior of two common hamstring graft constructs that are frequently used for reconstruction of the anterior cruciate ligament-Graft A: quadrupled semitendinosus tendon fixed with titanium button/polyester tape and suture/screw post, and Graft B: a double semitendinosus and double gracilis tendon fixed with a cross pin and two(More)
Although allografts for anterior cruciate ligament (ACL) replacement have shown advantages compared to autografts, their use is limited due to the risk of disease transmission and the limitations of available sterilization methods. Gamma sterilization has shown detrimental effects on graft properties at the high doses required for sufficient pathogen(More)
Rupture of the Achilles tendon is a considerable cause of morbidity with reduced function following injury. Recent studies have shown little difference in outcome between the techniques of open and non-operative treatment using an early active rehabilitation programme. Meta-analyses have shown that non-operative management has increased risk of re-rupture(More)