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Tibia plateau

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https://www.readbyqxmd.com/read/28642164/joint-loading-and-proximal-tibia-subchondral-trabecular-bone-microarchitecture-differ-with-walking-gait-patterns-in-end-stage-knee-osteoarthritis
#1
Bryant C Roberts, Lucian B Solomon, Graham Mercer, Karen J Reynolds, Dominic Thewlis, Egon Perilli
OBJECTIVES: To (1) stratify subgroups according to their distinct walking gait patterns in end-stage knee osteoarthritis (OA) patients; (2) compare measures of joint loading and proximal tibia subchondral trabecular bone (STB) microarchitecture among subgroups. DESIGN: Twenty-five knee OA patients undergoing total knee arthroplasty had pre-operative gait analysis. Following surgery, excised tibial plateaus were micro-CT-scanned and STB microarchitecture analysed in four tibial condylar regions of interest...
June 19, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28638170/atlas-based-automatic-measurements-of-the-morphology-of-the-tibiofemoral-joint
#2
M Brehler, G Thawait, W Shyr, J Ramsay, J H Siewerdsen, W Zbijewski
PURPOSE: Anatomical metrics of the tibiofemoral joint support assessment of joint stability and surgical planning. We propose an automated, atlas-based algorithm to streamline the measurements in 3D images of the joint and reduce user-dependence of the metrics arising from manual identification of the anatomical landmarks. METHODS: The method is initialized with coarse registrations of a set of atlas images to the fixed input image. The initial registrations are then refined separately for the tibia and femur and the best matching atlas is selected...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28634785/-imaging-and-preoperative-planning-for-osteotomies-around-the-knee
#3
REVIEW
D Pape, A Hoffmann, R Seil
Physiologic alignment of the human lower leg is well defined. The etiology for malalignment comprises constitutional, degenerative and posttraumatic conditions. Osteotomies around the knee can correct the malalignment, provided that the origin of deviation is in proximity of the knee center. Crucial factors for the evaluation of axis deviation are the weight-bearing line, the mechanical axes of femur and tibia, the joint line angles and the center of the hip, knee and upper ankle joint. Careful preoperative planning is mandatory for reproducible clinical results...
June 20, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28630761/partial-proximal-tibia-fractures
#4
Michael J Raschke, Christoph Kittl, Christoph Domnick
Partial tibial plateau fractures may occur as a consequence of either valgus or varus trauma combined with a rotational and axial compression component.High-energy trauma may result in a more complex and multi-fragmented fracture pattern, which occurs predominantly in young people. Conversely, a low-energy mechanism may lead to a pure depression fracture in the older population with weaker bone density.Pre-operative classification of these fractures, by Müller AO, Schatzker or novel CT-based methods, helps to understand the fracture pattern and choose the surgical approach and treatment strategy in accordance with estimated bone mineral density and the individual history of each patient...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28610776/two-stage-late-reconstruction-with-a-fresh-large-osteochondral-shell-allograft-transplantation-flocsat-for-a-large-ostechondral-defect-in-a-non-union-after-a-lateral-tibia-plateau-fracture-2-year-follow-up
#5
C Krettek, J Clausen, M Omar, S Noack, C Neunaber
This is the description of a 58-year-old female patient presenting 8 months after a horse riding accident with significant pain and inability to walk independently. Imaging revealed a large osseous defect of the lateral tibia plateau which was not united posteriorly. The patient refused knee replacement and we developed a patient specific two-step procedure for her. Step 1: Filling of the defect with a large cortico-cancellous autograft from the posterior iliac crest; step 2: Transplantation of a fresh large osteochondral shell allograft (FLOCSAT)...
May 17, 2017: Injury
https://www.readbyqxmd.com/read/28602471/primary-stability-of-tibial-plateaus-under-dynamic-compression-shear-loading-in-human-tibiae-influence-of-keel-length-cementation-area-and-tibial-stem
#6
Thomas M Grupp, Khaled J Saleh, Melanie Holderied, Andreas M Pfaff, Christoph Schilling, Christian Schroeder, William M Mihalko
The objective of our study was to evaluate the impact of the tibial keel & stem length in surface cementation, of a full cemented keel and of an additional tibial stem on the primary stability of a posterior stabilised tibial plateau (VEGA® System Aesculap Tuttlingen, Germany) under dynamic compression-shear loading conditions in human tibiae. We performed the cemented tibial plateau implantations on 24 fresh-frozen human tibiae of a mean donor age of 70.7years (range 47-97). The tibiae were divided into four groups of matched pairs based on comparable trabecular bone mineral density...
May 22, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28595814/extremity-compartment-syndrome-following-blunt-trauma-a-level-i-trauma-center-s-5-year-experience
#7
Daniel Zuchelli, Nicholas Divaris, Jane E McCormack, Emily C Huang, Neeta D Chaudhary, James A Vosswinkel, Randeep S Jawa
BACKGROUND: Extremity compartment syndrome is a recognized complication of trauma. We evaluated its prevalence and outcomes at a suburban level 1 trauma center. METHODS: The trauma registry was reviewed for all blunt trauma patients aged ≥18 years, admitted between 2010 and 2014. Chart review of patients with extremity compartment syndrome was performed. RESULTS: Of 6180 adult blunt trauma admissions, 83 patients developed 86 extremity compartment syndromes; two patients had compartment syndromes on multiple locations...
May 10, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28580241/lateral-capsular-fixation-an-implant-free-technique-to-prevent-meniscal-allograft-extrusion
#8
Joan C Monllau, Maximiliano Ibañez, Angel Masferrer-Pino, Pablo E Gelber, Juan I Erquicia, Xavier Pelfort
Although several surgical techniques have been described to perform meniscal allograft transplantation with good clinical results and although different methods of capsular stabilization can be found in the literature, there is no standard surgical technique to prevent a common complication in the most of series: the tendency to a radial displacement or extrusion of the transplanted menisci. We present a simple, reproducible, and implant-free technique to perform a lateral capsular fixation (capsulodesis) at the time of only the soft-tissue fixation technique of meniscal allograft transplantation in an effort to reduce or prevent the risk of graft extrusion...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28579444/three-dimensional-computed-tomography-analysis-of-the-posterior-tibial-slope-in-100-knees
#9
Jade Pei Yuik Ho, Azhar M Merican, Muhammad Sufian Hashim, Azlina A Abbas, Chee Ken Chan, Jamal A Mohamad
BACKGROUND: The posterior tibial slope (PTS) is an important consideration in knee arthroplasty. However, there is still no consensus for the optimal slope. The objectives of this study were (1) to reliably determine the native PTS in this population using 3-dimensional computed tomography scans and (2) to determine the normal reference range for PTS in this population. METHODS: One hundred computed tomography scans of disease-free knees were analyzed. A 3-dimensional reconstructed image of the tibia was generated and aligned to its anatomic axis in the coronal and sagittal planes...
May 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28571921/variability-in-static-alignment-and-kinematics-for-kinematically-aligned-tka
#10
Willy Theodore, Joshua Twiggs, Elizabeth Kolos, Justin Roe, Brett Fritsch, David Dickison, David Liu, Lucy Salmon, Brad Miles, Stephen Howell
BACKGROUND: Total knee arthroplasty (TKA) significantly improves pain and restores a considerable degree of function. However, improvements are needed to increase patient satisfaction and restore kinematics to allow more physically demanding activities that active patients consider important. The aim of our study was to compare the alignment and motion of kinematically and mechanically aligned TKAs. METHODS: A patient specific musculoskeletal computer simulation was used to compare the tibio-femoral and patello-femoral kinematics between mechanically aligned and kinematically aligned TKA in 20 patients...
May 29, 2017: Knee
https://www.readbyqxmd.com/read/28566780/radiologic-assessment-of-femoral-and-tibial-tunnel-placement-based-on-anatomic-landmarks-in-arthroscopic-single-bundle-anterior-cruciate-ligament-reconstruction
#11
Sandeep Kumar Nema, Gopisankar Balaji, Sujiv Akkilagunta, Jagdish Menon, Murali Poduval, Dilip Patro
BACKGROUND: Accurate tibial and femoral tunnel placement has a significant effect on outcomes after anterior cruciate ligament reconstruction (ACLR). Postoperative radiographs provide a reliable and valid way for the assessment of anatomical tunnel placement after ACLR. The aim of this study was to examine the radiographic location of tibial and femoral tunnels in patients who underwent arthroscopic ACLR using anatomic landmarks. Patients who underwent arthroscopic ACLR from January 2014 to March 2016 were included in this retrospective cohort study...
May 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28553441/prospective-case-study-of-outcome-of-tibial-plateau-fractures-treated-with-locking-condylar-plate
#12
R Jain
Introduction: Tibial plateau injury involves the articular surface of the proximal tibia with diverse group of fractures that represent a wide spectrum of severity that challenge even the most experienced surgeons, but with the invent of modern diagnostic technology and the advent of locking plates, results appear to be improving over time. Method: The study was conducted on thirty patients admitted in the department of orthopaedics with diagnoses of tibial plateau fractures treated with Locking Condylar Plate...
November 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28536794/good-clinical-results-can-be-obtained-along-with-reduced-risk-of-tunnel-communication-with-a-new-technique-in-concomitant-meniscus-transplantation-and-acl-reconstruction
#13
Murat Bozkurt, Mesut Tahta, Mustafa Akkaya, Cetin Isik, Safa Gursoy
PURPOSE: The purpose of this study was to introduce our technical modification for concomitant meniscus transplantation and ACL reconstruction with preliminary results of our cases. METHODS: The current study comprised of two sections: first is the cadaveric study of 20 specimens. The distances between tunnel entry and exit points of tunnels for 27 meniscal transplants and ACL reconstruction in CT slices were measured. The second section was evaluation of our cases including six patients...
May 23, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28499093/the-segond-fracture-is-an-avulsion-of-the-anterolateral-complex
#14
Humza Shaikh, Elmar Herbst, Ata Amir Rahnemai-Azar, Marcio Bottene Villa Albers, Jan-Hendrik Naendrup, Volker Musahl, James J Irrgang, Freddie H Fu
BACKGROUND: The Segond fracture was classically described as an avulsion fracture of the anterolateral capsule of the knee. Recently, some authors have attributed its pathogenesis to the "anterolateral ligament" (ALL). Biomechanical studies that have attempted to reproduce this fracture in vitro have reported conflicting findings. PURPOSE: To determine the anatomic characteristics of the Segond fracture on plain radiographs and magnetic resonance imaging (MRI), to compare this location with the location of the ALL described in prior radiographic and anatomic publications, and to determine the fracture's attachments to the soft tissue anterolateral structures of the knee...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28479051/asymmetry-in-gait-pattern-following-bicondylar-tibial-plateau-fractures-a-prospective-one-year-cohort-study
#15
Rasmus Elsoe, Peter Larsen
INTRODUCTION: Despite the high number of studies evaluating outcomes following tibial plateau fractures, the literature lacks studies including the objective assessment of gait pattern. The purpose of the present study was to evaluate asymmetry in gait patterns at 12 months after frame removal following ring fixation of a tibial plateau fracture. PATIENTS AND METHODS: The study design was a prospective cohort study. The primary outcome measurement was the gait patterns 12 months after frame removal measured with a pressure-sensitive mat...
April 27, 2017: Injury
https://www.readbyqxmd.com/read/28471817/effects-of-tibial-rotational-guided-growth-on-the-geometries-of-tibial-plateaus-and-menisci-in-rabbits
#16
Figen Sevil-Kilimci, Mutlu Cobanoglu, Mehmet K Ocal, Deniz Korkmaz, Emre Cullu
BACKGROUND: There are studies on the use of oblique plate over epiphyses for rotational deformities but the effects of this method on bone are not yet known. The purpose of this study was to determine the effect and rebound effect of rotational-guided growth on the geometries of the tibial plateaus and menisci in a rabbit model of tibial axial rotation. METHODS: Thirty male rabbits were 6 weeks old when medial and lateral plates were applied to the proximal tibias of the left side...
May 3, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28460415/articular-cartilage-surface-roughness-as-an-imaging-based-morphological-indicator-of-osteoarthritis-a-preliminary-investigation-of-osteoarthritis-initiative-subjects
#17
Michael D Newton, Jeffrey Osborne, Karissa Gawronski, Kevin C Baker, Tristan Maerz
Current imaging-based morphometric indicators of osteoarthritis (OA) using whole-compartment mean cartilage thickness (MCT) and volume changes can be insensitive to mild degenerative changes of articular cartilage (AC) due to areas of adjacent thickening and thinning. The purpose of this preliminary study was to evaluate cartilage thickness-based surface roughness as a morphometric indicator of OA. 3D magnetic resonance imaging (MRI) datasets were collected from osteoarthritis initiative (OAI) subjects with Kellgren-Lawrence (KL) OA grades of 0, 2, and 4 (n = 10/group)...
April 29, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28456927/associations-of-three-dimensional-t1-rho-mr-mapping-and-three-dimensional-t2-mapping-with-macroscopic-and-histologic-grading-as-a-biomarker-for-early-articular-degeneration-of-knee-cartilage
#18
T Sasho, J Katsuragi, S Yamaguchi, H Haneishi, T Aizimu, T Tanaka, A Watanabe, Y Sato, R Akagi, K Matsumoto, T Uno, K Motoori
T1 rho and T2 mapping are magnetic resonance imaging (MRI) techniques to detect early degenerative changes in cartilage. Recent advancements have enabled 3D acquisition for both techniques. The objective of the present study was to examine the correlation of 3D T1 rho and 3D T2 mapping with macroscopic and histological characteristics of knee cartilage. Twenty-one patients who underwent total knee arthroplasty due to osteoarthritis with involvement of the medial compartment but with minimum involvement of the lateral compartment were enrolled...
April 29, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28451863/variations-in-knee-kinematics-after-acl-injury-and-after-reconstruction-are-correlated-with-bone-shape-differences
#19
Drew A Lansdown, Valentina Pedoia, Musa Zaid, Keiko Amano, Richard B Souza, Xiaojuan Li, C Benjamin Ma
BACKGROUND: The factors that contribute to the abnormal knee kinematics after anterior cruciate ligament (ACL) injury and ACL reconstruction remain unclear. Bone shape has been implicated in the development of hip and knee osteoarthritis, although there is little knowledge about the effects of bone shape on knee kinematics after ACL injury and after ACL reconstruction. QUESTIONS/QUESTIONS: (1) What is the relationship between bony morphology with alterations in knee kinematics after ACL injury? (2) Are baseline bone shape features related to abnormal knee kinematics at 12 months after ACL reconstruction? METHODS: Thirty-eight patients (29 ± 8 years, 21 men) were prospectively followed after acute ACL injury and before ligamentous reconstruction...
April 27, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28435556/anterior-knee-pain-after-tibial-intra-medullary-nailing-is-it-predictable
#20
P C Soraganvi, B S Anand-Kumar, R Rajagopalakrishnan, B A Praveen-Kumar
Introduction: Intramedullary nailing has been used frequently for the treatment of tibial diaphyseal fractures. Chronic anterior knee pain has been considered the most frequent post-operative complication of this technique. We investigated the relationship between anterior knee pain and position of nail tip in proximal tibia. Methods: 103 patients were selected among patients who underwent interlocking nailing in our institution. Patients with other factors that might cause anterior knee pain were excluded...
July 2016: Malaysian Orthopaedic Journal
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