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https://www.readbyqxmd.com/read/27936429/investigation-of-biomechanical-response-of-hoffa-s-fat-pad-and-comparative-characterization
#1
Chiara Giulia Fontanella, Emanuele Luigi Carniel, Alessandro Frigo, Veronica Macchi, Andrea Porzionato, Gloria Sarasin, Marco Rossato, Raffaele De Caro, Arturo N Natali
The infrapatellar adipose body (Hoffa's fat pad, IFP) is situated between the patellar tendon, the femoral condyle and the tibial plateau. The IFP consists of lobules of white adipose tissue delimited by thin connective septa. The actual structural functionality of the IFP is debated and should pertain to a cushioning role in the knee joint, providing to distribute and to damp mechanical stresses during articular activity. The present study is aimed to analyze the correlation between histological configuration and mechanical properties of the IFP, compared to other adipose tissues, partially differentiated by composition and conformation...
December 1, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27936066/the-influence-of-articular-cartilage-thickness-reduction-on-meniscus-biomechanics
#2
Piotr Łuczkiewicz, Karol Daszkiewicz, Jacek Chróścielewski, Wojciech Witkowski, Pawel J Winklewski
OBJECTIVE: Evaluation of the biomechanical interaction between meniscus and cartilage in medial compartment knee osteoarthritis. METHODS: The finite element method was used to simulate knee joint contact mechanics. Three knee models were created on the basis of knee geometry from the Open Knee project. We reduced the thickness of medial cartilages in the intact knee model by approximately 50% to obtain a medial knee osteoarthritis (OA) model. Two variants of medial knee OA model with congruent and incongruent contact surfaces were analysed to investigate the influence of congruency...
2016: PloS One
https://www.readbyqxmd.com/read/27935005/preoperative-low-level-laser-therapy-in-dogs-undergoing-tibial-plateau-levelling-osteotomy-a-blinded-prospective-randomized-clinical-trial
#3
Cleo P Rogatko, Wendy I Baltzer, Rachel Tennant
OBJECTIVES: To evaluate the influence of preoperative low-level laser therapy (LLLT) on therapeutic outcomes of dogs undergoing tibial plateau levelling osteotomy (TPLO). METHODS: Healthy dogs undergoing TPLO were randomly assigned to receive either a single preoperative LLLT treatment (800-900 nm dual wavelength, 6 W, 3.5 J/cm(2), 100 cm(2) area) or a sham treatment. Lameness assessment and response to manipulation, as well as force plate analysis, were performed preoperatively, then again at 24 hours, two weeks, and eight weeks postoperatively...
December 9, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27923624/a-novel-3d-approach-for-determination-of-frontal-and-coronal-plane-tibial-slopes-from-mr-imaging
#4
Amirhesam Amerinatanzi, Rodney Summers, Kaveh Ahmadi, Vijay K Goel, Timothy E Hewett, Edward Nyman
BACKGROUND: The proximal tibia is geometrically complex, asymmetrical, and variable, is heavily implicated in arthrokinematics of the knee joint, and thus a contributor to knee pathologies such as non-contact anterior cruciate ligament injury. Medial, lateral, and coronal tibial slopes are anatomic parameters that may increase predisposition to knee injuries, but the extent to which each contributes has yet to be fully realized. Previously, two-dimensional methods have quantified tibial slopes, but more reliable 3D methods may prove advantageous...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27920813/densitometric-evaluation-of-bone-prosthetic-counterface-in-hip-and-knee-arthroplasty-with-modern-implants
#5
Andrea Cozzi Lepri, Marco Giorgini, Carla Signorini, Christian Carulli, Roberto Civinini, Maria Luisa Brandi, Massimo Innocenti
INTRODUCTION: Recent acquisitions of the complex mechanisms of osseointegration between implants and host bone have gained attention, accordingly to the methods of evaluation of these interactions. DEXA analysis is considered an useful tool to assess such phenomena, in order to analyse in a quantitative manner the local metabolic activity of the bone, and to evaluate over the time the integration between host bone and prosthetic components. The purpose of the present study is to report about a preliminary experience in the analysis of osseointegration processes of patients undergoing a primary Total Hip Arthroplasty (THA) or a revision Total Knee Arthroplasty (rTKA)...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27919673/proximal-tibial-anterior-open-wedge-oblique-osteotomy-a-novel-technique-to-correct-genu-recurvatum
#6
Tae Woo Kim, Sahnghoon Lee, Jung-Ro Yoon, Hyuk-Soo Han, Myung Chul Lee
BACKGROUND: For successful acute correction of genu recurvatum, accurate correction of plateau angle, restoration of anatomical axis, rigid fixation, and preservation of patellar height are essential. However, a surgical treatment that satisfies all these conditions has not yet been established. The purpose of this study was to evaluate the novel technique of proximal tibial anterior open-wedge oblique osteotomy (PT-AOWOO) for the treatment of genu recurvatum. METHODS: Five patients with genu recurvatum underwent PT-AOWOO from 2008 to 2013...
December 2, 2016: Knee
https://www.readbyqxmd.com/read/27916579/distal-patellar-tendon-avulsion-in-association-with-high-energy-knee-trauma-a-case-series-and-review-of-the-literature
#7
Brian Capogna, Eric Strauss, Sanjit Konda, Alan Dayan, Michael Alaia
BACKGROUND: Patellar tendon rupture is rare in the general population. Typically, failure occurs proximally or at the mid-substance. Distal avulsion from the tibial tubercle in adults is rare and not well described in the orthopedic literature. METHODS: We present the largest series of patients with distal patellar tendon injury with associated multi-ligamentous disruption of the knee. A series of six patients with distal patellar tendon avulsion were identified at a single institution...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27914662/surgical-site-infection-in-tibial-plateau-fractures-with-ipsilateral-compartment-syndrome
#8
Andrew G Dubina, Ebrahim Paryavi, Theodore T Manson, Christopher Allmon, Robert V O'Toole
AIM: The aim of this study was to investigate the effects of compartment syndrome and timing of fasciotomy wound closure on surgical site infection (SSI) after surgical fixation of tibial plateau fractures. Our primary hypothesis was that SSI rate is increased for fractures with compartment syndrome versus those without, even accounting for confounders associated with infection. Our secondary hypothesis was that infection rates are unrelated to timing of fasciotomy closure or fixation...
October 18, 2016: Injury
https://www.readbyqxmd.com/read/27913901/3d-active-passive-response-of-human-knee-joint-in-gait-is-markedly-altered-when-simulated-as-a-planar-2d-joint
#9
H Marouane, A Shirazi-Adl, M Adouni
Musculoskeletal models of the lower extremity make a number of important assumptions when attempting to estimate muscle forces and tibiofemoral compartmental loads in activities such as gait. The knee is commonly idealized as a planar 2D joint in the sagittal plane with no consideration of motions and equilibrium in remaining planes. With muscle forces predicted, the static equilibrium in the frontal plane is then used to estimate compartmental loads neglecting also joint passive resistance and assuming condylar contact centers...
December 2, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27904222/functional-and-computed-tomography-correlation-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-use-of-accessory-anteromedial-portal
#10
Naveen Joseph Mathai, Rajkumar S Amaravathi, K V Pavan, Padmanabhan Sekaran, Gaurav Sharma, Belliappa Codanda
BACKGROUND: An accessory anteromedial portal (AAMP) has been shown to be effective in placing an anatomically ideal femoral tunnel. It is well known that this is due to the independent femoral drilling which is possible with the AAMP. However very little is known regarding the significance of this reconstruction technique in influencing the functional outcomes of anatomic anterior cruciate ligament reconstruction (ACLR). This study documents the influence of tibial and femoral tunnel positions on functional outcomes of anatomic ACLR using the AAMP...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27901393/comparison-of-desired-radiographic-advancement-distance-and-true-advancement-distance-required-for-patellar-tendon-tibial-plateau-angle-reduction-to-the-ideal-90%C3%A2-in-dogs-by-use-of-the-modified-maquet-technique
#11
Paul Pillard, Veronique Livet, Quentin Cabon, Camille Bismuth, Juliette Sonet, Denise Remy, Didier Fau, Claude Carozzo, Eric Viguier, Thibaut Cachon
OBJECTIVE To evaluate the validity of 2 radiographic methods for measurement of the tibial tuberosity advancement distance required to achieve a reduction in patellar tendon-tibial plateau angle (PTA) to the ideal 90° in dogs by use of the modified Maquet technique (MMT). SAMPLE 24 stifle joints harvested from 12 canine cadavers. PROCEDURES Radiographs of stifle joints placed at 135° in the true lateral position were used to measure the required tibial tuberosity advancement distance with the conventional (A(M)) and correction (A(E)) methods...
December 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27894175/comparison-of-cable-method-and-miniaci-method-using-picture-archiving-and-communication-system-in-preoperative-planning-for-open-wedge-high-tibial-osteotomy
#12
Seong-Dae Yoon, GuoFeng Zhang, Hee-June Kim, Byoung-Joo Lee, Hee-Soo Kyung
Purpose: The purpose was to compare the accuracy of Miniaci method using picture archiving and communication system (PACS) with a cable method in high tibial osteotomy (HTO). Materials and Methods: This study analyzed 47 patients (52 knees) with varus deformity and medial osteoarthritis. From 2007 to 2013, patients underwent HTO using either a cable method (20 knees) or Miniaci method based on a PACS image (32 knees). In the cable method, the 62.5% point of the mediolateral tibial plateau width was located using an electrocautery cord under fluoroscopy (cable group)...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27893158/articular-cartilage-scores-in-cranial-cruciate-ligament-deficient-dogs-with-or-without-bucket-handle-tears-of-the-medial-meniscus
#13
Kathryn Kaufman, Brian S Beale, Howard D Thames, W Brian Saunders
OBJECTIVE: To compare articular cartilage scores in cranial cruciate ligament (CCL)-deficient dogs with or without concurrent bucket handle tears (BHT) of the medial meniscus. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs treated with arthroscopy and tibial plateau leveling osteotomy or extracapsular repair for complete CCL rupture (290 stifles from 264 dogs). METHODS: Medical records and arthroscopic images were reviewed...
November 28, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27891668/systematic-mapping-of-the-subchondral-bone-3d-microarchitecture-in-the-human-tibial-plateau-variations-with-joint-alignment
#14
Bryant C Roberts, Dominic Thewlis, Lucian B Solomon, Graham Mercer, Karen J Reynolds, Egon Perilli
Tibial subchondral bone plays an important role in knee osteoarthritis (OA). Microarchitectural characterization of subchondral bone plate (SBP), underlying subchondral trabecular bone (STB) and relationships between these compartments, however, is limited. The aim of this study was to characterize the spatial distribution of SBP thickness, SBP porosity and STB microarchitecture, and relationships among them, in OA tibiae of varying joint alignment. Twenty-five tibial plateaus from end-stage knee-OA patients, with varus (n = 17) or non-varus (n = 8) alignment were micro-CT scanned (17 μm/voxel)...
November 7, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27890319/diachronic-changes-in-size-and-shape-of-human-proximal-tibia-in-central-europe-during-the-latest-1200-years
#15
H Brzobohatá, V Krajíček, Z Horák, P Sedlak, J Velemínská
During the past twelve centuries, the stature of Central European inhabitants has increased significantly with corresponding changes in the size of lower limb bones. The aim of our study was to determine whether these changes have occurred strictly in relation to size or if the shape of skeletal structures has been altered simultaneously. Diachronic size and shape changes in the proximal part of tibia in a Central European population (Czech Republic) were studied using geometric morphometrics (principal components analysis, Hotelling's test, linear discriminant analysis)...
October 13, 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27889405/primary-total-knee-arthroplasty-for-elderly-complex-tibial-plateau-fractures
#16
Jie-Feng Huang, Jian-Jian Shen, Jun-Jie Chen, Pei-Jian Tong
OBJECTIVE: The aim of this study is to evaluate the clinical and radiologic results of primary Total Knee Arthroplasty (TKA) for elderly complex tibial plateau fractures. MATERIALS AND METHODS: Between November 2010 and February 2012, six cases of elderly complex tibial plateau fractures were treated with primary TKA using the standard medial parapatellar approach. All six patients were available at follow up with mean duration of 32.3 months (range 25-41 months)...
November 23, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27889111/minimally-invasive-fixation-in-tibial-plateau-fractures-using-an-pre-operative-and-intra-operative-real-size-3d-printing
#17
Silvio Giannetti, Nicola Bizzotto, Andrea Stancati, Attilio Santucci
The purpose of our study was to compare the outcome after minimally invasive reconstruction and internal fixation with and without the use of pre- and intra-operative real size 3D printing for patients with displaced tibial plateau fractures (TPFs). We prospectively followed up 40 consecutive adult patients with closed TPF who underwent surgical treatment of reconstruction of the tibial plateau with the use of minimally invasive fixation. Sixteen patients (group 1) were operated using a pre-operative and intra-operative real size 3D-model, while 24 patients (group 2) were operated without 3D-model printing, but using only pre-operative and intra-operative 3D Tc-scan images...
November 18, 2016: Injury
https://www.readbyqxmd.com/read/27884644/evaluating-augmentation-with-calcium-phosphate-cement-chronos-inject-for-bone-defects-after-internal-fixation-of-proximal-tibial-fractures-a-prospective-multi-center-observational-study
#18
Ki Chul Park, Chang-Wug Oh, Young-Hoon Jo
INTRODUCTION: Managing subchondral bone defects in proximal tibia fractures after plateau reduction is an important consideration.ChronOSInjectis a recently developed calcium phosphate bone substitute that shows relatively fast osteointegration. HYPOTHESIS: UsingchronOS Inject during internal fixation of proximal tibial fractures provides a satisfactory treatment option that is both clinically and radiologically safe. MATERIALS AND METHODS: Patients enrolled in this study were treated with ChronOS Injectbone void filler, during internal fixation of proximal tibial fractures...
November 21, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27876490/medial-open-wedge-high-tibial-osteotomy-for-varus-malunited-tibial-plateau-fractures
#19
S R Sundararajan, H S Nagaraja, S Rajasekaran
PURPOSE: To analyze radiologic and functional outcomes of varus malunited tibial plateau fractures managed with medial open wedge high tibial osteotomy (MOHTO). METHODS: Eighteen patients with symptomatic varus malunited tibial plateau fractures with less than stage II arthritic changes managed from July 2009 to October 2013 were included. Patients with complex intra-articular step malunions and severe arthritic changes (stage III and IV) were excluded. Initially, diagnostic arthroscopy was performed followed by MOHTO stabilized with locking plate and tricortical autograft (n = 11, 61%) or a Puddu plate and allograft (n = 7, 39%)...
November 19, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27876267/open-wedge-high-tibial-osteotomy-using-three-dimensional-printed-models-experimental-analysis-using-porcine-bone
#20
Jun-Dae Kwun, Hee-June Kim, Jaeyoung Park, Il-Hyung Park, Hee-Soo Kyung
BACKGROUND: The purpose of this study was to evaluate the usefulness of three-dimensional (3D) printed models for open wedge high tibial osteotomy (HTO) in porcine bone. METHODS: Computed tomography (CT) images were obtained from 10 porcine knees and 3D imaging was planned using the 3D-Slicer program. The osteotomy line was drawn from the three centimeters below the medial tibial plateau to the proximal end of the fibular head. Then the osteotomy gap was opened until the mechanical axis line was 62...
November 18, 2016: Knee
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