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https://www.readbyqxmd.com/read/28095169/examination-of-knee-morphology-after-secondary-ipsilateral-acl-injury-compared-to-those-that-have-not-reinjured-a-preliminary-study
#1
Jessica E Digiacomo, Riann M Palmieri-Smith, John A Redmann, Lindsey K Lepley
CONTEXT: Modifiable and non-modifiable risk factors have been identified for sustaining a primary ACL injury, however less research is available examining risk factors for a second injury. Identifying whether bony morphological factors are different (or more exaggerated) among those that experience a secondary ACL injury is critical to understanding if non-modifiable risk factors are associated with a second injury. OBJECTIVE: To identify if bony morphology is different among those that experience a secondary ACL re-injury as compared to ACL individuals that do not...
January 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28092318/opening-injection-pressure-is-higher-in-intraneural-compared-with-perineural-injections-during-simulated-nerve-blocks-of-the-lower-limb-in-fresh-human-cadavers
#2
Kris Vermeylen, Marlies Hermans, Filiep Soetens, Evie Vereecke, Thorsten Steinfeldt, Gerbrand Groen, Admir Hadzic, Marc Van de Velde
BACKGROUND AND OBJECTIVES: Needle-induced nerve trauma and intraneural injection can lead to neurologic injury during peripheral nerve blocks. In this study, we assessed the utility of opening injection pressure (OIP), time to OIP, and rate of rise to OIP in detecting needle-nerve contact and intraneural injection. METHODS: Five common ultrasound-guided blocks of the femoral, saphenous, subgluteal sciatic, tibial, and common peroneal nerves were simulated in 10 fresh cadavers...
January 13, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28067099/dynamic-rsa-for-the-evaluation-of-inducible-micromotion-of-oxford-uka-during-step-up-and-step-down-motion
#3
Kristian Horsager, Bart L Kaptein, Lone RøMer, Peter B Jørgensen, Maiken Stilling
Background and purpose - Implant inducible micromotions have been suggested to reflect the quality of the fixation interface. We investigated the usability of dynamic RSA for evaluation of inducible micromotions of the Oxford Unicompartmental Knee Arthroplasty (UKA) tibial component, and evaluated factors that have been suggested to compromise the fixation, such as fixation method, component alignment, and radiolucent lines (RLLs). Patients and methods - 15 patients (12 men) with a mean age of 69 (55-86) years, with an Oxford UKA (7 cemented), were studied after a mean time in situ of 4...
January 9, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28065623/an-anatomic-investigation-into-the-relationship-between-posterior-condylar-offset-and-posterior-tibial-slope-of-one-thousand-one-hundred-thirty-eight-cadaveric-knees
#4
Douglas S Weinberg, Jeremy J Gebhart, Glenn D Wera
BACKGROUND: Posterior condylar offset (PCO) and posterior tibial slope (PTS) have critical consequences in total knee arthroplasty, especially with regards to sagittal plane balancing. However, there has only been limited investigation into the functional consequences of each, and there have only been anecdotal observations regarding any associations between PCO and PTS. METHODS: In a large osteological study of 1138 knees, standardized measurements of PCO and PTS were taken using previously described techniques on specimens of different age, race, and gender...
December 22, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28060180/new-single-stage-double-osteotomy-for-late-presenting-infantile-tibia-vara-a-comprehensive-approach
#5
Edward Abraham, David Toby, Michelle Welborn, Cory W Helder, Angela Murphy
BACKGROUND: Successful surgical treatment of late-presenting infantile tibia vara (ITV) patient requires the correction of oblique deformities. The purpose of this study was to report on a new comprehensive approach to correct and prevent recurrence of these deformities with a single procedure. METHODS: Medical records of 23 consecutive children (7 to 18 y) with advanced ITV (29 knees) were retrospectively reviewed after a mean of 7.3 years postoperatively (range, 2 to 22 y)...
January 5, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28031492/tibial-plateau-slopes-in-indian-patients-with-or-without-anterior-cruciate-ligament-injury-a-magnetic-resonance-imaging-study
#6
Shyam Sundar, Sarthak Patnaik, Bobur Ubaydullaev, Vinodh Kolandavelu, David Rajan
PURPOSE: To compare anterior cruciate ligament (ACL)-injured and ACL-intact patients as well as males and females in terms of tibial plateau slopes to determine their association with ACL injury. METHODS: Magnetic resonance images (MRI) of the knee of 310 male and 179 female skeletally mature Indian patients (mean age, 40 years) with (n=170+29) or without (n=140+150) ACL injury were reviewed. Their medial and lateral tibial plateau slopes (MTPS and LTPS), medial tibial plateau depth (MTPD), and lateral tibial plateau height (LTPH) were measured using MRI...
December 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/27993462/complex-medial-meniscus-tears-are-associated-with-a-biconcave-medial-tibial-plateau
#7
F Alan Barber, Mark H Getelman, Kathy L Berry
PURPOSE: To determine whether an association exists between a biconcave medial tibial plateau and complex medial meniscus tears. METHODS: A consecutive series of stable knees undergoing arthroscopy were evaluated retrospectively with the use of preoperative magnetic resonance imaging (MRI), radiographs, and arthroscopy documented by intraoperative videos. Investigators independently performed blinded reviews of the MRI or videos. Based on the arthroscopy findings, medial tibial plateaus were classified as either biconcave or not biconcave...
December 16, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27989384/evaluation-of-predicted-knee-function-for-component-malrotation-in-total-knee-arthroplasty
#8
Valentine Vanheule, Hendrik Pieter Delport, Michael Skipper Andersen, Lennart Scheys, Roel Wirix-Speetjens, Ilse Jonkers, Jan Victor, Jos Vander Sloten
Soft-tissue balancing for total knee arthroplasty (TKA) remains subjective and highly dependent on surgical expertise. Pre-operative planning may support the clinician in taking decisions by integrating subject-specific computer models that predict functional outcome. However, validation of these models is essential before they can be applied in clinical practice. The aim of this study was to evaluate a knee modelling workflow by comparing experimental cadaveric measures to model-based kinematics and ligament length changes...
December 15, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27935076/electrophysiologically-identified-piriformis-syndrome-is-successfully-treated-with-incobotulinum-toxin-a-and-physical-therapy
#9
Loren M Fishman, Allen N Wilkins, Bernard Rosner
INTRODUCTION: Piriformis syndrome is entrapment of the sciatic nerve by the piriformis muscle. METHODS: 56-person randomized, double-blinded, controlled study involving physical therapy and incobotulinum toxin A or placebo. INCLUSION CRITERIA: 3 standard deviation delay of posterior tibial (PT) or fibular FN) H-reflexes in flexion, adduction and internal rotation (FAIR-test), and normal paraspinal EMG. OUTCOME MEASURES: adverse side-effects, visual analogue scale (VAS), H-reflex delay in FAIR-test...
December 9, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27928547/relationship-of-acl-injury-and-posterior-tibial-slope-with-patient-age-sex-and-race
#10
Alana Waiwaiole, Ajay Gurbani, Kambiz Motamedi, Leanne Seeger, Myung Shin Sim, Patricia Nwajuaku, Sharon L Hame
BACKGROUND: Posterior tibial slope (PTS) has been proposed as a potential risk factor for anterior cruciate ligament (ACL) injury; however, studies that have examined this relationship have provided inconclusive and sometimes contradictory results. Further characterization of this relationship may enable the medical community to identify individuals at greater risk for ACL injury and possibly characterize an anatomic target during surgical reconstruction. PURPOSE: The primary goal was to investigate the relationship between PTS and ACL injury...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27923624/a-novel-3d-approach-for-determination-of-frontal-and-coronal-plane-tibial-slopes-from-mr-imaging
#11
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/27904715/computer-assisted-navigation-in-high-tibial-osteotomy
#12
REVIEW
Sang Jun Song, Dae Kyung Bae
Computer-assisted navigation is used to improve the accuracy and precision of correction angles during high tibial osteotomy. Most studies have reported that this technique reduces the outliers of coronal alignment and unintended changes in the tibial posterior slope angle. However, more sophisticated studies are necessary to determine whether the technique will improve the clinical results and long-term survival rates. Knowledge of the navigation technology, surgical techniques and potential pitfalls, the clinical results of previous studies, and understanding of the advantages and limitations of the computer-assisted navigation are crucial to successful application of this new technique in high tibial osteotomy...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27894173/open-wedge-high-tibial-osteotomy-and-combined-arthroscopic-surgery-in-severe-medial-osteoarthritis-and-varus-malalignment-minimum-5-year-results
#13
Moon-Jib Yoo, Yong-Eun Shin
Purpose: To evaluate the radiologic and functional outcomes of medial open wedge high tibial osteotomy (HTO) combined with arthroscopic procedure in patients with medial osteoarthritis. Materials and Methods: From June 1996 to March 2010, 26 patients (32 knees) who underwent medial open wedge osteotomy and arthroscopic operation for medial osteoarthritis were retrospectively reviewed. Measurements included hip-knee-ankle (HKA) angle, femorotibial angle, medial proximal tibial angle, posterior tibial slope angle, and Kellgren-Lawrence grade...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27890319/diachronic-changes-in-size-and-shape-of-human-proximal-tibia-in-central-europe-during-the-latest-1200-years
#14
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)...
December 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27888317/effect-of-tibial-slope-changes-on-femorotibial-contact-kinematics-after-cruciate-retaining-total-knee-arthroplasty
#15
Xi-Qing Pan, A-Qin Peng, Fei Wang, Feng Li, Xi-Zeng Nie, Xi Yang, Gang Ji, Xiao-Meng Wang
PURPOSE: The present study was undertaken to evaluate the effect of tibial slope (TS) changes on the femorotibial articular contact kinematics in subjects undergoing posterior cruciate-retaining total knee arthroplasty (CRTKA). METHODS: Eighteen knees in nine patients with medial osteoarthritis who underwent CRTKA using the same size prosthesis were analysed preoperatively and 2 years after TKA. TS changes were calculated on lateral radiographs taken before and after TKA...
November 25, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27876490/medial-open-wedge-high-tibial-osteotomy-for-varus-malunited-tibial-plateau-fractures
#16
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
#17
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
https://www.readbyqxmd.com/read/27871654/surgical-management-and-treatment-of-the-anterior-cruciate-ligament-deficient-knee-with-malalignment
#18
REVIEW
Matthew D Crawford, Lee H Diehl, Annunziato Amendola
Varus malalignment and an increased tibial slope can result in instability in an anterior cruciate ligament (ACL)-deficient knee. Malalignment can also be a cause of recurrent instability following ACL reconstruction. Varus malalignment can contribute to loosening or failure of primary ACL reconstruction and contribute to progressive medial compartment arthritis. High tibial osteotomies performed in conjunction with ACL reconstruction can improve alignment, restore anterior knee stability, and help reduce the advancement of arthritis...
January 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/27861256/nonmodifiable-risk-factors-for-anterior-cruciate-ligament-injury
#19
Meghan J Price, Maria Tuca, Frank A Cordasco, Daniel W Green
PURPOSE OF REVIEW: As anterior cruciate ligament (ACL) injury is becoming increasingly prevalent in the population of active children and young adolescents, it is crucial to be aware of both the modifiable and nonmodifiable factors that place this population at increased ACL injury risk. Historically, there has not been a definitive consensus on all of these risk factors-particularly the nonmodifiable ones. RECENT FINDINGS: The present review has accumulated the most recent evidence for the nonmodifiable risk factors in ACL injury focusing particularly on female gender, generalized joint laxity, knee recurvatum, increased lateral tibial slope, decreased intercondylar notch width, structural lower extremity valgus, limb length discrepancy, family history, and history of contralateral knee ACL injury...
November 16, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27825593/a-soft-tissue-preserving-method-for-evaluating-the-impact-of-posterior-tibial-slope-on-kinematics-during-cruciate-retaining-total-knee-arthroplasty-a-validation-study
#20
Yifei Dai, Laurent D Angibaud, Jean-Yves Jenny, Cyril Hamad, Amaury Jung, Michael B Cross
BACKGROUND: The reconstructed posterior tibial slope (PTS) plays a significant role in restoring knee kinematics in cruciate-retaining total knee arthroplasty. However, conventional methods for the investigation of PTS can be limited by sample size or prone to errors due to damages to the bone and/or soft tissues. The purpose of this study was to validate a novel method for the evaluation of the effects of PTS on knee kinematics. METHODS: Seven computer-assisted cruciate-retaining TKAs were performed by two surgeons on healthy cadaveric knees...
December 2016: Knee
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