For the new arthroscopic femoral tensioning and posterior cruciate ligament (PCL) reconstruction in chronic PCL injury, we make a transtibial tunnel, using the posterior trans-septal portal, while preserving the remnant bundle of the original PCL and meniscofemoral ligament. Also, to preserve the remnant femoral fibers of the PCL and provide femoral tensioning, we manipulate the suture hook with No.1 PDS by hand so that the sharp tip penetrates the remnants of the PCL near the femoral attachment site. After pulling the sutures previously placed at the remnant PCL fibers, the notchplasty osteotome is advanced to the femoral footprint of the PCL to a depth of 1 to 2 mm from the shallow to the deep direction. Then the remnant PCL fibers are detached from the medial femoral condyle, which the authors call the artificial femoral "peel-off" tear. We drill the femoral tunnel using the outside-in technique in the anatomic place of PCL footprint, which is located 1 to 2 mm from the edge of the articular cartilage. This procedure significantly contributes to the posterior stability and proprioception of the knee joint, the remnant femoral fibers and meniscofemoral fibers are preserved to be healed with a graft and subsequently form an integrated structure.
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http://dx.doi.org/10.1016/j.arthro.2005.11.011 | DOI Listing |
Biogerontology
January 2025
Song Biotechnologies LLC., Baltimore, MD, 21030, USA.
Human populations are experiencing unprecedented growth and longevity with lingering knowledge gaps of the characteristics, mechanisms, and pathologies of senescence. Invasive measurements and long-term control conditions for longitudinal studies are infeasible, necessitating the need for surrogate animal models. Rats have short lifespans (2-3 years) with translatable cardiovascular systems, and Sprague Dawley microcirculatory preparations are key to studying the oxygen transport mechanisms critical to the loss of skeletal muscle function in aging.
View Article and Find Full Text PDFJ Clin Med
December 2024
Pediatric Orthopedics, Hadassah-Hebrew University Medical Center, Jerusalem 9112001, Israel.
: Femoral torsional malalignment is a common cause of in-toeing and out-toeing in children, often leading to gait disturbances, functional limitations, and increased risk of falls. Traditionally, osteotomy was the only surgical option for correction. A minimally invasive technique known as rotational guided growth (RGG) has recently been introduced to address these malalignments.
View Article and Find Full Text PDFBioengineering (Basel)
December 2024
Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn, MI 48128, USA.
Cerclage is an orthopedic surgical fixation technique using a cable wrapped, tensioned, and secured around a bone's circumference. It is important to minimize the loss in cable tension that often occurs due to stress relaxation. The purpose of this work was to study the effect of tensioning protocols on the long-term loss of tension due to stress relaxation.
View Article and Find Full Text PDFEur J Orthop Surg Traumatol
December 2024
Department of Orthopedics and Trauma, Universidade Federal Fluminense (UFF), Niterói, Rio de Janeiro, Brazil.
Purpose: Although several techniques have been described for bent intramedullary nail removal, there is no universally accepted strategy. We hypothesized that a device based on the action principle of a three-point bend fixture could facilitate extraction of bent intramedullary nails; this paper describes its design and experimental testing.
Methods: Five large synthetic left femurs and five steel intramedullary nails were used.
J Pediatr Orthop B
December 2024
Department of Paediatric Orthopaedics, Chacha Nehru Bal Chikitsalaya, Delhi, India.
We studied the correlation between changes in the interscrew angle (screw divergence) and the correction achieved with tension band plates applied for valgus deformities of the knee region. Twenty-eight children with 68 operated physes were included in this retrospective review. The interscrew angle and screw trajectory angle were measured in the initial and follow-up radiographs.
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