Results 81 to 90 of about 3,289 (260)

Proximal anatomical axes show bidirectional variability: Accurate tibial slope requires mechanical axis measurement

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose To determine whether posterior tibial slope (PTS) measured to proximal anatomical axes can serve as a reliable proxy for PTS measured to the mechanical tibial axis (mTA). Methods In patients ≥18 years with failed anterior cruciate ligament reconstruction, medial and lateral PTS were measured relative to the mTA on a lateral lower‐leg ...
Barbara C. Boer, Quinten W. T. Veerman, Reinoud W. Brouwer, Judith olde Heuvel, Tony G. van Tienen, Wolf Petersen, Roy A. G. Hoogeslag   +6 more
wiley   +1 more source

On commuting differential operators

Electronic Journal of Differential Equations, 2000
The theory of commuting linear differential expressions has received a lot of attention since Lax presented his description of the KdV hierarchy by Lax pairs $(P,L)$. Gesztesy and the present author have established a relationship of this circle of ideas
R. Weikard
doaj  

Jumps and twists in affine Toda field theories

Nuclear Physics B, 2015
The concept of point-like “jump” defects is investigated in the context of affine Toda field theories. The Hamiltonian formulation is employed for the analysis of the problem.
Anastasia Doikou
doaj   +1 more source

High posterior tibial slope increases graft failure risk but does not impair functional outcomes after primary ACL reconstruction

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose Posterior tibial slope (PTS) has been implicated in anterior cruciate ligament (ACL) graft failure, but its relationship to objective stability and patient‐reported outcomes (PROs) after primary ACL reconstruction (ACLR) remains unclear. The study evaluated whether higher PTS is associated with laximetry, graft survival, and PROs after
Paul Souvik, Maher Ghandour, Ernest Siret, Fabio Sammartino, Piercecchi Antoine, Matthieu Ollivier   +5 more
wiley   +1 more source

The Lattice Structure of Connection Preserving Deformations for q-Painlevé Equations I

Symmetry, Integrability and Geometry: Methods and Applications, 2011
We wish to explore a link between the Lax integrability of the q-Painlevé equations and the symmetries of the q-Painlevé equations. We shall demonstrate that the connection preserving deformations that give rise to the q-Painlevé equations may be thought
Christopher M. Ormerod
doaj   +1 more source

Underestimation of tibial tuberosity–trochlear groove distance in conventional knee magnetic resonance imaging compared to full‐extension imaging

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose To assess the effect of the knee flexion on the tibial tuberosity–trochlear groove (TT–TG) distance measurement by comparing conventional and whole‐leg rotational magnetic resonance imaging (MRI). Methods This retrospective cohort study included 45 patients with patellar dislocations who had undergone both conventional knee MRI with ...
Chantal Gaudes, Lena Eggeling, Vito Gaetano Rinaldi, David Dejour, Stefano Zaffagnini, Roland Becker, Sebastian Kopf   +6 more
wiley   +1 more source

Negative flows and non-autonomous reductions of the Volterra lattice [PDF]

Open Communications in Nonlinear Mathematical Physics
We study reductions of the Volterra lattice corresponding to stationary equations for the additional, noncommutative subalgebra of symmetries. It is shown that, in the case of general position, such a reduction is equivalent to the stationary equation ...
V. E. Adler
doaj   +1 more source

Targeting ligament boundaries rather than alignment boundaries in augmented‐reality‐assisted total knee arthroplasty ensures comparable gait patterns between operated and contralateral limbs

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose Modern personalised total knee arthroplasty (TKA) techniques aim to mimic natural knee kinematics by focusing on soft‐tissue dynamics rather than static alignment. However, a consistent definition of the optimal ligamentous balance has not yet been established.
Michael Engl, Fjorela Qordja, Guido Bocchino, Giulio Maccauro, Sebastian Schaller, Andrea Giordano Salvi, Luca De Berardinis, Michele Paolo Festini Capello, Pieralberto Valpiana, Pier Francesco Indelli   +9 more
wiley   +1 more source

Lax pairs and Bäcklund transformations for a new (3+1)-dimensional integrable equation utilizing symbolic computation

Ain Shams Engineering Journal
This article discusses a new integrable wave equation in (3+1)-dimensions that describes shallow water waves. The auto–Bäcklund and Cole-Hopf transformations are constructed by means of the homogeneous balance approach, which results in numerous new ...
Adil Jhangeer, Asifa Zahid, Zeeshan Amjad, Nauman Raza, Taseer Muhammad   +4 more
doaj   +1 more source

Managing the meniscus Part 2: Traumatic tear patterns, biologic augmentation, transplantation, innovation and future research

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Acute, traumatic meniscus tears are common and should be repaired whenever possible. However, the biological age of the patient, along with the specific tear morphology, may significantly influence the selection of the repair technique, expected clinical outcomes and the postoperative rehabilitation protocol.
Armin Runer, Matthew P. Kolevar, Ehab M. Nazzal, Jonathan D. Hughes, Sebastian Kopf, Aaron J. Krych, Michael T. Hirschmann, Robert F. LaPrade, Alan Getgood, Tim Spalding, Robert Prill, Maria Tuca, Matthieu Ollivier, Sebastian Siebenlist, Sachin Tapasvi, Volker Musahl   +15 more
wiley   +1 more source