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Tibia plateau

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https://www.readbyqxmd.com/read/29141359/-analysis-of-the-tibial-baseplate-coverage-and-symmetrical-tibial-prosthesis-in-primary-total-knee-arthroplasty
#1
C L Zhao, J P Wang, Z H Sun, M Li, J W Chen
Objective: To investigate the tibial baseplate coverage with symmnetrical tibial prosthesis in primary total knee arthroplasty (TKA). Methods: From August 2014 to February 2015, 39 patients (39 knees) with varus knee osteoarthritis were retrospective reviewed in Department of Orthopaedics, Tianjin Xiqing Hospital. Nine males and 30 females; aged 50 to 78 years (67±6 year). 3D tibia models of the knee were built with Mimics 10.01 software, simulated TKA surgeries were performed. The morphology of the proximal tibia was measured, including the mediolateral (ML), anteroposterior (AP) and medial and lateral tibial plateau AP dimensions...
November 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29133993/lithobius-chinobius-yuchernovi-a-new-lithobiid-species-from-northeastern-siberia-and-the-kamchatka-peninsula-russia-chilopoda-lithobiomorpha
#2
Gyulli Sh Farzalieva, Pavel S Nefediev, Ivan H Tuf
Lithobius yuchernovisp. n. is described, based on type material from the Ola Plateau, Magadan Region, Russia. The new species is widely distributed in northeastern Siberia, ranging from the Magadan Region, until the eastern Chukot Autonomous Region and the Kamchatka Peninsula in the southeast, whence non-type material is documented. This species belongs to the subgenus Chinobius Matic, 1973 based on the structure of the female gonopodal claw (more than two denticles on the internal ridge). It differs from all Palearctic species of the genus Lithobius by the following apomorphy: distoventral tubercle supporting a cluster of long and curved setae situated on the last male tibia...
2017: ZooKeys
https://www.readbyqxmd.com/read/29062819/conventional-plate-and-screws-in-medial-opening-wedge-high-tibial-osteotomy-are-they-sufficiently-stable-a-retrospective-study
#3
Rodrigo Salim, Fabricio Fogagnolo, Mauricio Martins Perina, Ugo Messas Rubio, Mauricio Kfuri Junior
OBJECTIVE: Opening-wedge osteotomy of the proximal tibia is a widely performed procedure for treating medial gonarthrosis in active patients and in the presence of varus malalignment of the lower limb. The fixation method is controversial, and the use of conventional implants has been abandoned in favor of implants with more modern locking screws. The aim of the present clinical study was to assess the maintenance of the correction achieved in cases wherein fixation was performed using conventional implants...
September 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28989220/high-resolution-extremity-cone-beam-ct-with-a-cmos-detector-task-based-optimization-of-scintillator-thickness
#4
Q Cao, M Brehler, A Sisniega, J W Stayman, J Yorkston, J H Siewerdsen, W Zbijewski
PURPOSE: CMOS x-ray detectors offer small pixel sizes and low electronic noise that may support the development of novel high-resolution imaging applications of cone-beam CT (CBCT). We investigate the effects of CsI scintillator thickness on the performance of CMOS detectors in high resolution imaging tasks, in particular in quantitative imaging of bone microstructure in extremity CBCT. METHODS: A scintillator thickness-dependent cascaded systems model of CMOS x-ray detectors was developed...
March 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28958155/serial-changes-in-the-joint-space-width-and-joint-line-convergence-angle-after-closed-wedge-high-tibial-osteotomy
#5
Cheol Hee Park, Dae Kyung Bae, Kang Il Kim, Jong Whan Lee, Sang Jun Song
BACKGROUND: There have been little data concerning serial changes in the joint space width (JSW) and joint line convergence angle over the course of follow-up periods after closed-wedge high tibial osteotomy (CWHTO). PURPOSE: To evaluate serial changes in the JSW and joint line convergence angle after CWHTO. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A total of 100 computer-assisted CWHTOs with a minimum follow-up period of 3 years (mean, 4...
September 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28939969/tibial-shaft-anatomy-differs-between-caucasians-and-east-asian-individuals
#6
Hongyi Shao, Chilung Chen, Daniel Scholl, Ahmad Faizan, Antonia F Chen
PURPOSE: The orientation and distance from the shaft of the femur and tibia to the articular surface centre is important for performing total knee arthroplasty (TKA) with cementless stems. It is important to understand anatomic differences between races to match the tibial and femoral shaft axis to the knee articular surface. Thus, the purpose of this study was to compare knee morphology between Caucasian and East Asian individuals to determine the optimal placement of tibial and femoral stems...
September 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28910722/analysis-of-in-vivo-articular-cartilage-contact-surface-of-the-knee-during-a-step-up-motion
#7
Peng Yin, Jing-Sheng Li, Willem A Kernkamp, Tsung-Yuan Tsai, Seung-Hoon Baek, Ali Hosseini, Lin Lin, Peifu Tang, Guoan Li
BACKGROUND: Numerous studies have reported on the tibiofemoral articular cartilage contact kinematics, however, no data has been reported on the articular cartilage geometry at the contact area. This study investigated the in-vivo tibiofemoral articular cartilage contact biomechanics during a dynamic step-up motion. METHODS: Ten healthy subjects were imaged using a validated magnetic resonance and dual fluoroscopic imaging technique during a step-up motion. Three-dimensional bone and cartilage models were constructed from the magnetic resonance images...
November 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28899123/subchondral-bone-microarchitecture-analysis-in-the-proximal-tibia-at-7-t-mri
#8
Christoph A Agten, Stephen Honig, Punam K Saha, Ravinder Regatte, Gregory Chang
Background Bone remodels in response to mechanical loads and osteoporosis results from impaired ability of bone to remodel. Bone microarchitecture analysis provides information on bone quality beyond bone mineral density (BMD). Purpose To compare subchondral bone microarchitecture parameters in the medial and lateral tibia plateau in individuals with and without fragility fractures. Material and Methods Twelve female patients (mean age = 58 ± 15 years; six with and six without previous fragility fractures) were examined with dual-energy X-ray absorptiometry (DXA) and 7-T magnetic resonance imaging (MRI) of the proximal tibia...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28865948/a-new-topical-hemostatic-agent-tt-173-reduces-blood-loss-in-a-sheep-model-of-total-knee-arthroplasty
#9
Alberto Centeno, Santiago Rojas, Belén Arias, Ignasi Miquel, Pilar Sánchez, Claudia Ureta, Esther Rincón, Ramón López, Jesús Murat
BACKGROUND: Total knee arthroplasty is associated with blood loss during the intervention and may require allogenic blood transfusion. Treatments such as tranexamic acid and fibrin sealants improved the bleeding control in several clinical trials, but the hemorrhage associated with the intervention is still significant. Thus far, very few studies have evaluated hemostatic treatments in animal models of total knee arthroplasty. This work describes a sheep model of bleeding associated with total knee arthroplasty and investigates a new class of hemostatic treatment based on recombinant tissue factor...
August 30, 2017: Knee
https://www.readbyqxmd.com/read/28833285/a-novel-jig-arm-to-measure-tibial-plateau-angle-during-tibial-plateau-leveling-osteotomy
#10
Kyle N Restle, Jeffery J Biskup
OBJECTIVE: To determine the ability of a novel device attached to the proximal tibial plateau leveling osteotomy (TPLO) jig pin to accurately predict intraoperative change in tibial plateau angle (TPA). STUDY DESIGN: In vitro cadaveric study. SAMPLE POPULATION: Left hindlimbs of adult dogs (n = 9). METHODS: A modified Slocum tibial plateau leveling (TPL) jig with the Rotational Osteotomy Measuring Arm (ROMA) was placed on the tibia and a radial TPLO osteotomy was performed...
August 22, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28828263/the-effects-of-captive-versus-wild-rearing-environments-on-long-bone-articular-surfaces-in-common-chimpanzees-pan-troglodytes
#11
Kristi L Lewton
The physical environments of captive and wild animals frequently differ in substrate types and compliance. As a result, there is an assumption that differences in rearing environments between captive and wild individuals produce differences in skeletal morphology. Here, this hypothesis is tested using a sample of 42 captive and wild common chimpanzees (Pan troglodytes). Articular surface areas of the humerus, radius, ulna, femur, and tibia were calculated from linear breadth measurements, adjusted for size differences using Mosimann shape variables, and compared across sex and environmental groups using two-way ANOVA...
2017: PeerJ
https://www.readbyqxmd.com/read/28791659/three-dimensional-analysis-of-the-tibial-resection-plane-relative-to-the-arthritic-tibial-plateau-in-total-knee-arthroplasty
#12
J Michael Johnson, Mohamed R Mahfouz, Mehmet Rüştü Midillioğlu, Alexander J Nedopil, Stephen M Howell
BACKGROUND: Kinematically aligned total knee arthroplasty strives to correct the arthritic deformity by restoring the native tibial joint line. However, the precision of such surgical correction needs to be quantified in order to reduce recuts of the resection and to design assisting instrumentation. This study describes a method for novel three-dimensional analysis of tibial resection parameters in total knee arthroplasty. Pre-operative versus post-operative differences in the slopes of the varus-valgus and flexion-extension planes and the proximal-distal level between the tibia resection and the arthritic tibial joint line can reliably be measured using the three-dimensional models of the tibia and fibula...
August 8, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28760373/advantages-of-external-hybrid-fixators-for-treating-schatzker-v-vi-tibial-plateau-fractures-a-retrospective-study-of-40-cases
#13
J-B Gross, B Gavanier, R Belleville, H Coudane, D Mainard
INTRODUCTION: Proximal tibia fractures make up 1% of all fractures in adults. The fractures classified as Schatzker V and VI fractures can compromise knee structure and function. They are challenging to treat and often have complications. While plate fixation is the gold standard, the resulting infection rate has led us to favor external hybrid fixation. The aims of this study were to assess the radiographic and functional outcomes along with the complication rate when using this method and to compare them to historical plate fixation data...
October 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28735430/approaches-and-fixation-of-the-posterolateral-fracture-fragment-in-tibial-plateau-fractures-a-review-with-an-emphasis-on-rim-plating-via-modified-anterolateral-approach
#14
REVIEW
Jae-Woo Cho, Jinil Kim, Won-Tae Cho, Jin-Kak Kim, Puspak Samal, Pranay H Gujjar, William T Kent, Jong-Keon Oh
PURPOSE: To review available approaches and fixation methods for posterolateral fracture fragment (PLF) in tibial plateau fracture, and to propose an algorithm to treat various types of plateau fractures which all involve the PLF. METHODS: This article reviews multiple surgical approaches for PLF and suggests an algorithm for suitable approach and fixation method according to PLF with combined plateau fracture. RESULTS: The modified anterolateral approach is a suitable single approach for fractures with a PLF combined with an anterolateral plateau fracture and for isolated posterolateral fracture fragments...
July 22, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28720297/comparison-of-tibial-anatomical-mechanical-axis-angle-between-predisposed-dogs-and-dogs-at-low-risk-for-cranial-cruciate-ligament-rupture
#15
COMPARATIVE STUDY
L Guénégo, M Payot, P Charru, P Verwaerde
The purpose of this prospective, radiographic, descriptive study was to compare measurements of tibial anatomical-mechanical axis angle (AMA-angle), tibial plateau angle (TPA), relative tibial tuberosity width (rTTW) and Z-angle from mediolateral radiographs of the tibia between two canine breeds (72 dogs) not predisposed to cranial cruciate ligament rupture (CCLR) and those from a consecutive series of 185 large dogs and 17 West Highland white terriers (WHWT) diagnosed with unilateral, surgically confirmed CCLR...
July 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28720096/clinical-and-radiographic-predictors-of-acute-compartment-syndrome-in-the-treatment-of-tibial-plateau-fractures-a-retrospective-cohort-study
#16
Axel Gamulin, Anne Lübbeke, Patrick Belinga, Pierre Hoffmeyer, Thomas V Perneger, Matthieu Zingg, Gregory Cunningham
BACKGROUND: The aim of the study was to evaluate the relation between demographic, injury-related, clinical and radiological factors of patients with tibial plateau fractures and the development of acute compartment syndrome. METHODS: All consecutive adult patients with intra-articular tibial plateau fractures admitted in our urban academic medical centre between January 2005 and December 2009 were included in this retrospective cohort study. The main outcome measurement was the development of acute compartment syndrome...
July 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28702392/subchondroplasty-for-treating-bone-marrow-lesions-in-the-knee-initial-experience
#17
Marcelo Batista Bonadio, Pedro Nogueira Giglio, Camilo Partezani Helito, José Ricardo Pécora, Gilberto Luis Camanho, Marco Kawamura Demange
OBJECTIVE: To evaluate the use of subchondroplasty in the treatment of bone marrow lesions in an initial series of five cases. METHODS: The study included patients aged between 40 and 75 years old, with pain in the knee for at least six months, associated with high-signal MRI lesion on T2 sequences, on the tibia or femur. Patients were assessed using the visual analog pain scale and the KOOS score, one week before surgery and one, three, six, 12, and 24 weeks after the procedure...
May 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28696780/evaluation-of-the-effectiveness-of-toe-board-energy-absorbing-material-for-foot-ankle-and-lower-leg-injury-reduction
#18
John P Patalak, Joel D Stitzel
OBJECTIVE: Since 2000, numerous improvements have been made to the National Association for Stock Car Auto Racing, Incorporated (NASCAR®) driver restraint system, resulting in improved crash protection for motorsports drivers. Advancements have included seats, head and neck restraints (HNRs), seat belt restraint systems, driver helmets, and others. These enhancements have increased protection for drivers from severe crash loading. Extending protection to the driver's extremities remains challenging...
July 11, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28696495/robotic-arm-assisted-total-knee-arthroplasty-demonstrated-soft-tissue-protection
#19
Anton Khlopas, Morad Chughtai, Emily L Hampp, Laura Y Scholl, Michael Prieto, Ta-Cheng Chang, Abdullah Abbasi, Manoshi Bhowmik-Stoker, Jason Otto, David J Jacofsky, Michael A Mont
INTRODUCTION: While total knee arthroplasty (TKA) procedures have demonstrated clinical success, occasionally intraoperative complications can occur. Collateral or posterior cruciate ligament injury, instability, extensor mechanism disruption, and tibiofemoral or patellofemoral dislocation are among a few of the intraoperatively driven adverse events prevalently ranked by The Knee Society. Robotic-arm assisted TKA (RATKA) provides a surgeon the ability to three-dimensionally plan a TKA and use intraoperative visual, auditory, and tactile feedback to ensure that only the desired bone cuts are made...
July 11, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28656456/modifications-of-femoral-component-design-in-multi-radius-total-knee-arthroplasty-lead-to-higher-lateral-posterior-femoro-tibial-translation
#20
Tilman Pfitzner, Philippe Moewis, Patrick Stein, Heide Boeth, Adam Trepczynski, Philipp von Roth, Georg N Duda
PURPOSE: As the aims of changes in total knee arthroplasty (TKA) designs are to reinstate more natural kinematics, the current study evaluated the in vivo kinematics in patients who underwent a cruciate retaining gradually changing femoral radius ("G-CURVE") against a cruciate retaining conventional changing femoral radius ("J-CURVE") geometry TKA design. The hypothesis of the study is that the G-CURVE design would allow a substantial increase in the femoral rollback compared to the J-CURVE design...
June 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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