Dominik C Meyer

..Level of Evidence: Prognostic study, level II-1 (retrospective study)...

..This work was designed to develop and test a precise, standardized, and reliable technique for measurement of passive and active ankle range of motion...

..The tendon end, which was previously released (16 weeks prior) from its insertion site with a bone chip, was elongated with a velocity of 1 mm/day...

..The hypothesis of this study was that under compressive loads, tendon grafts will undergo a temporary volumetric (and therefore diametric) reduction, due to the extrusion of water from the tendon...

..We analyzed the resultant graft-tunnel contact pressure using an in vitro model of human cadaver 8mm hamstring grafts...

..Further, the otherwise slippery graft surface was modified with impressed tricalcium phosphate granules (TCP) to improve friction and mechanical hold...

..The structural failure rate of rotator cuff repair can exceed 50%. Important predictors for repair failure are preoperative fatty muscle infiltration and myotendinous retraction...

..However, a re-rupture rate of approximately 30% in isolated meniscal tears has to be acknowledged, which still reflects the need for biological enhancement of meniscal healing...

..We hypothesise that joint degeneration, however, may influence the anteroposterior knee laxity. Therefore, we set out to test this hypothesis simulating a progressively 'degenerated' joint in an experimental cadaveric setting...

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..Therefore, we hypothesize that current test standards may systematically lead to a false overestimation of their performance...

..We quantified changes in chronically retracted tendons undergoing no repair or a staged repair involving an initial re-lengthening of the musculotendinous unit by traction in a sheep model of massive rotator cuff tear...

..Although continuous musculotendinous relengthening can experimentally restore muscular architecture, restoration of atrophy and fatty infiltration is hitherto impossible...

..A critical evaluation of benefits and expenditures of both treatment options as in a cost effectiveness analysis seems well-suited to provide valuable information for treating physicians and healthcare policymakers...

..Chronic tendon tears lead to retraction, fatty infiltration, and atrophy of the respective muscle. These muscle changes are decision-making criteria in rotator cuff tear management...

..Consequently, atrophy and rupture can affect tendon healing after rotator cuff repair, thus potentially discrediting the outcome of surgery...

..However, it is currently unknown to what extent the muscle and tendon contribute to the degree of total retraction. Further understanding of this may possibly influence the strategy of musculotendinous reconstruction...

..Closing wedge patellar osteotomy, combined with sulcus-deepening trochleoplasty, can increase patellofemoral congruence with good clinical outcome...

..We describe a technique of anterior epicondylar advancement for the correction of symptomatic flexion gap instability...

..As the typical failure mode of the graft is to slip past the interference screw, it was hypothesized that the position and configuration of the graft end may be of influence on the fixation strength...

..This increases local pressure and may thus importantly contribute to increased wear and early loosening...

..We present a tool and method that allow completion of the knot on a single suture limb. Alternatively, the method can be used to perform all-inside endoscopic or arthroscopic knot tying without removal of the instrument from the body...

..A central AV of less than 10 degrees was associated with cranial retroversion. The presence of a positive cross-over-sign is a highly reliable indicator of cranial AV of <4 degrees...

..There are types of dysplasia both with (B and D) and without (A and C) a supratrochlear spur. The aim of this study was to identify influencing factors for the clinical outcome following trochleoplasty...

..It is, therefore, possible to use the AHD read on MRI or CT studies for prognostic reasons, provided the values obtained are converted accordingly and remembering that the correlation of the values is only moderate...

..It was the purpose of this experiment to test the hypothesis that slow, continuous elongation of a retracted musculotendinous unit allows reversal of the currently irreversible structural muscle changes...

..These values will be used for the interpretation and comparison of outcome results in the currently available literature for different treatment options...

..However, meniscal repair constructs are also exposed to shear forces parallel to the circumferential meniscal fibers during healing, particularly in the midportion of the meniscus...

..Fatty infiltration is therefore not seen as a degenerative process but a necessary rearrangement of the tissue after macroarchitectural changes caused by musculo-tendinous retraction...

..For optimal suture fixation to bone, sutures or anchors should be positioned subcortically or medially under the articular surface...

..This study was designed to comprehensively compare the mechanical properties of 4 types of braided polyblend sutures with widely used braided polyester and monofilament polydioxanone sutures...

..CONCLUSIONS: At 37 degrees C, structural failure (breaking) of absorbable suture anchors may occur if loaded to the mechanical limit. Absorbable anchors are particularly sensitive to static, long-term loading...

..Anchors with suture-protecting channels are particularly sensitive to the orientation in which the sutures are loaded...