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https://www.readbyqxmd.com/read/29244525/20-year-outcomes-of-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-autograft-the-catastrophic-effect-of-age-and-posterior-tibial-slope
#1
Lucy J Salmon, Emma Heath, Hawar Akrawi, Justin P Roe, James Linklater, Leo A Pinczewski
BACKGROUND: No well-controlled studies have compared the long-term outcome of anterior cruciate ligament (ACL) reconstruction with hamstring tendon autograft between adolescents and adults. Increased posterior tibial slopes (PTSs) have been reported in the ACL-injured versus controls, but the effect of PTS on the outcome after reconstruction is relatively unexplored. PURPOSE: To compare the prospective longitudinal outcome of "isolated" ACL ruptures treated with anatomic endoscopic ACL reconstruction using hamstring tendon autograft over 20 years in adolescent and adult cohorts and to examine factors for repeat ACL injury...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29229417/diagnostic-value-of-computed-tomography-and-risk-factors-for-lateral-hinge-fracture-in-the-open-wedge-high-tibial-osteotomy
#2
O-Sung Lee, Yong Seuk Lee
PURPOSE: The purposes of this study were to evaluate (1) the disparity of detection of lateral hinge fracture (LHF) between postoperative simple radiography and high-resolution computed tomography (CT) and affecting factors of LHF and (2) whether generally recommended postoperative rehabilitation protocols are appropriate according to the type of LHF. METHODS: From 2014 to 2015, patients who underwent primary open wedge high tibial osteotomy (OWHTO) for isolated medial compartment osteoarthritis of the knee joint were retrospectively enrolled...
December 8, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29225019/primary-versus-revision-anterior-cruciate-ligament-reconstruction-patient-demographics-radiographic-findings-and-associated-lesions
#3
Justin J Mitchell, Mark E Cinque, Grant J Dornan, Lauren M Matheny, Chase S Dean, Brad Kruckeberg, Gilbert Moatshe, Jorge Chahla, Robert F LaPrade
PURPOSE: The purpose of this study was to evaluate the differences in intra-articular pathology, demographic characteristics, and radiographic characteristics of the knee associated with primary anterior cruciate ligament reconstruction (ACLR) versus revision ACLR at the time of initial presentation with either a native anterior cruciate ligament tear or an anterior cruciate ligament graft tear. Secondarily, we aimed to investigate risk factors for concomitant medial and lateral meniscal tears and cartilage injuries at the time of ACLR...
December 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29222607/static-and-fatigue-strength-of-a-novel-anatomically-contoured-implant-compared-to-five-current-open-wedge-high-tibial-osteotomy-plates
#4
Arnaud Diffo Kaze, Stefan Maas, James Belsey, Alexander Hoffmann, Dietrich Pape
BACKGROUND: The purpose of the present study was to compare the mechanical static and fatigue strength of the size 2 osteotomy plate "Activmotion" with the following five other common implants for the treatment of medial knee joint osteoarthritis: the TomoFix small stature, the TomoFix standard, the Contour Lock, the iBalance and the second generation PEEKPower. METHODS: Six fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy (HTO), according to standard techniques, using size 2 Activmotion osteotomy plates...
December 8, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29181560/stability-and-alignment-do-not-improve-by-using-patient-specific-instrumentation-in-total-knee-arthroplasty-a-randomized-controlled-trial
#5
Nienke M Kosse, Petra J C Heesterbeek, Janneke J P Schimmel, Gijs G van Hellemondt, Ate B Wymenga, Koen C Defoort
PURPOSE: The primary aim of the study was to examine stability and alignment after total knee arthroplasty (TKA) using patient-specific instrumentation (PSI) and conventional instrumentation (CI). The hypothesis was that stability and alignment would be better using PSI than CI, 12 months postoperatively. The secondary aim included the evaluation of clinical outcomes after TKA. METHODS: In this prospective randomized controlled trial, 42 patients with knee osteoarthritis received a Genesis II PS prosthesis with either PSI or CI...
November 28, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29181558/internal-external-malalignment-of-the-femoral-component-in-kinematically-aligned-total-knee-arthroplasty-increases-tibial-force-imbalance-but-does-not-change-laxities-of-the-tibiofemoral-joint
#6
Jeremy Riley, Joshua D Roth, Stephen M Howell, Maury L Hull
PURPOSE: The purposes of this study were to quantify the increase in tibial force imbalance (i.e. magnitude of difference between medial and lateral tibial forces) and changes in laxities caused by  2° and 4° of internal-external (I-E) malalignment of the femoral component in kinematically aligned total knee arthroplasty. Because I-E malalignment would introduce the greatest changes to the articular surfaces near 90° of flexion, the hypotheses were that the tibial force imbalance would be significantly increased near 90° flexion and that primarily varus-valgus laxity would be affected near 90° flexion...
November 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29173552/the-influence-of-tibial-and-femoral-bone-morphology-on-knee-kinematics-in-the-anterior-cruciate-ligament-injured-knee
#7
REVIEW
Drew Lansdown, Chunbong Benjamin Ma
Bone morphology is one feature that contributes to knee kinematics. The geometry of the tibia and femur vary across individuals, and these differences can influence the risk of anterior cruciate ligament (ACL) injury and of failure after isolated ACL reconstruction. There has been renewed interest in lateral extra-articular stabilization procedures to supplement an ACL reconstruction, although which patients benefit most from these procedures remains unclear. This article reviews the impact of bone morphology on knee kinematics, including tibial slope, depth of the medial tibial plateau, intercondylar notch shape, tibial eminence volume, and sphericity of the femoral condyles...
January 2018: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/29154178/the-effect-of-wedge-and-tibial-slope-angles-on-knee-contact-pressure-and-kinematics-following-medial-opening-wedge-high-tibial-osteotomy
#8
Marianne S Black, Agnes G d'Entremont, Robert G McCormack, Gregory Hansen, Derek Carr, David R Wilson
BACKGROUND: High tibial osteotomy is a surgical procedure to treat medial compartment osteoarthritis in varus knees. The reported success rates of the procedure are inconsistent, which may be due to sagittal plane alignment of the osteotomy. The objective of this study was to determine the effect of changing tibial slope, for a range of tibial wedge angles in high tibial osteotomy, on knee joint contact pressure location and kinematics during continuous loaded flexion/extension. METHODS: Seven cadaveric knee specimens were cycled through flexion and extension in an Oxford knee-loading rig...
November 2, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29150695/new-angle-measurement-device-to-control-the-posterior-tibial-slope-angle-in-medial-opening-wedge-high-tibial-osteotomy
#9
Hiroyasu Ogawa, Kazu Matsumoto, Haruhiko Akiyama
INTRODUCTION: Medial opening wedge high tibial osteotomy has been associated with an unintentional increase in the posterior tibial slope angle. We aimed to evaluate the effectiveness of a novel bone spreader angle rod to maintain the native posterior tibial slope angle in medial opening wedge high tibial osteotomy. MATERIALS AND METHODS: Data from 92 consecutive knees in 83 patients who underwent medial opening wedge high tibial osteotomy for knee osteoarthritis between March 2015 and June 2016 were analysed...
November 17, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29130040/effect-of-computer-navigation-on-accuracy-and-reliability-of-limb-alignment-correction-following-open-wedge-high-tibial-osteotomy-a-meta-analysis
#10
Seung-Beom Han, Hyun Jung Kim, Dae-Hee Lee
Background: It is unclear whether computer navigation can improve the accuracy and reliability of targeted lower limb alignment correction following open-wedge high tibial osteotomy (HTO). This meta-analysis was designed to compare the accuracy and reliability of limb alignment correction between computer navigated and conventional open-wedge HTOs. Methods: Studies that compared postoperative coronal alignment, including mechanical axis (MA) and weight bearing line (WBL) ratio, outliers of alignment correction, and change in tibial posterior slope, following open-wedge HTO performed using computer navigated and conventional methods were included...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29110512/short-term-clinical-and-radiographic-results-of-the-salto-mobile-total-ankle-prosthesis
#11
Dong Dong Wan, Woo Jin Choi, Dong Woo Shim, Yeokgu Hwang, Yoo Jung Park, Jin Woo Lee
BACKGROUND: The mobile-bearing Salto total ankle prosthesis has been reported to have promising outcomes. However, clinical reports on this prosthesis are few, and most have been published by the inventors and disclosed consultants. METHODS: We retrospectively reviewed 59 patients who received Salto prosthesis unilaterally. The average follow-up was 35.9 (range, 6-56) months. Clinical and radiologic results were evaluated. Clinical results were evaluated according to visual analog scale (VAS), American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot score, Ankle Osteoarthritis Scale (AOS) pain and disability score, and ankle range of motion (ROM) in dorsiflexion/plantarflexion...
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29103778/reduced-bearing-excursion-after-mobile-bearing-unicompartmental-knee-arthroplasty-is-associated-with-poor-functional-outcomes
#12
Naman Wahal, Sahil Gaba, Rajesh Malhotra, Vijay Kumar, Elise C Pegg, Hemant Pandit
BACKGROUND: A small proportion of patients with mobile unicompartmental knee arthroplasty (UKA) report poor functional outcomes in spite of optimal component alignment on postoperative radiographs. The purpose of this study is to assess whether there is a correlation between functional outcome and knee kinematics. METHODS: From a cohort of consecutive cases of 150 Oxford medial UKA, patients with fair/poor functional outcome at 1-year postsurgery (Oxford Knee Score [OKS] < 34, n = 15) were identified and matched for age, gender, preoperative clinical scores, and follow-up period with a cohort of patients with good/excellent outcome (OKS ≥ 34, n = 15)...
October 6, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29101660/comparison-of-bone-healing-and-outcomes-between-allogenous-bone-chip-and-hydroxyapatite-chip-grafts-in-open-wedge-high-tibial-osteotomy
#13
O-Sung Lee, Kyung Jae Lee, Yong Seuk Lee
Allogenous bone chips and hydroxyapatite (HA) chips have been known as good options for filling an inevitable void after open wedge high tibial osteotomy (OWHTO). However, there are concerns regarding bone healing after the use of these grafts. The purpose of this study was to compare the bone healing represented by the osteoconductivity and absorbability between allogenous bone chips and HA chips in OWHTO. The outcomes of bone healing of 53 patients who received an allogenous bone chip graft and 41 patients who received an HA chip graft were retrospectively evaluated, and the results were compared between the two groups...
November 3, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29100001/effects-of-anterior-closing-wedge-tibial-osteotomy-on-anterior-cruciate-ligament-force-and-knee-kinematics
#14
Kent T Yamaguchi, Edward C Cheung, Keith L Markolf, Daniel V Boguszewski, Justin Mathew, David R McAllister, Frank A Petrigliano
BACKGROUND: A certain percentage of patients undergoing anterior cruciate ligament (ACL) reconstruction will experience graft failure, and there is mounting evidence that an increased posterior tibial slope (PTS) may be a predisposing factor. Theoretically, under tibiofemoral compression force (TFC), a reduced PTS would induce less anterior tibial translation (ATT) and lower ACL force. HYPOTHESIS: Ten-degree anterior closing wedge osteotomy of the proximal tibia will significantly reduce ACL force and alter knee kinematics during robotic testing...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29096929/reinforcement-strategy-for-lateral-rafting-plate-fixation-in-posterolateral-column-fractures-of-the-tibial-plateau-the-magic-screw-technique
#15
Hui Sun, Yi Zhu, Qi-Fang He, Lin-Yuan Shu, Wei Zhang, Yi-Min Chai
BACKGROUND: A posterolateral column fracture of the tibial plateau (PLCF) is not uncommon, especially lateral and bicondylar tibial plateau fractures. Currently, there is no consensus on the methods of surgical treatment for PLCF, including the surgical approach or the fixation strategy. Though various posterior approaches have been explored and can allow posterior buttress plate fixation, the necessity of a posterior approach with fixation for PLCFs is increasingly questioned. Meanwhile, there is no literature to analyse the morphological features of PLCFs...
October 30, 2017: Injury
https://www.readbyqxmd.com/read/29078961/new-parameters-describing-how-knee-ligaments-carry-force-in-situ-predict-interspecimen-variations-in-laxity-during-simulated-clinical-exams
#16
Carl W Imhauser, Robert N Kent, James Boorman-Padgett, Ran Thein, Thomas L Wickiewicz, Andrew D Pearle
Knee laxity, defined as the net translation or rotation of the tibia relative to the femur in a given direction in response to an applied load, is highly variable from person to person. High levels of knee laxity as assessed during routine clinical exams are associated with first-time ligament injury and graft reinjury following reconstruction. During laxity exams, ligaments carry force to resist the applied load; however, relationships between intersubject variations in knee laxity and variations in how ligaments carry force as the knee moves through its passive envelope of motion, which we refer to as ligament engagement, are not well established...
October 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29075841/effects-of-tibial-baseplate-shape-on-rotational-alignment-in-total-knee-arthroplasty-three-dimensional-surgical-simulation-using-osteoarthritis-knees
#17
Yuan Ma, Hideki Mizu-Uchi, Ken Okazaki, Tetsuro Ushio, Koji Murakami, Satoshi Hamai, Yukio Akasaki, Yasuharu Nakashima
INTRODUCTION: Placement of tibial component is expected to fulfill both maximum surface coverage and recommended anterior-posterior (AP) alignment in total knee arthroplasty (TKA). The purpose of this study is to evaluate the effect of the tibial baseplate shape on AP axis. MATERIALS AND METHODS: Virtual surgery of TKA was performed with three-dimensional bone models reconstructed from 77 osteoarthritis varus knees. Two differently designed tibial baseplates, symmetrically and anatomically, were set to the cut surface under posterior slopes of 0°, 3°, and 7°...
October 26, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29066248/comparison-of-clinical-results-and-injury-risk-of-posterior-tibial-cortex-between-attune-and-press-fit-condylar-sigma-knee-systems
#18
Sang Jun Song, Cheol Hee Park, Hu Liang, Se Gu Kang, Jong Jun Park, Dae Kyung Bae
BACKGROUND: We compared clinical and radiographic results after total knee arthroplasty (TKA) using Attune and Press Fit Condylar Sigma, and investigated whether use of the current prosthesis increased injury risk to the tibial cortex in Asian patients. We also assessed whether a preoperative posterior tibial slope angle (PSA) is associated with the injury when using the current prosthesis. METHODS: The 300 TKAs with Attune (group A) were compared to the 300 TKAs with Press Fit Condylar Sigma (group B)...
October 6, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29062819/conventional-plate-and-screws-in-medial-opening-wedge-high-tibial-osteotomy-are-they-sufficiently-stable-a-retrospective-study
#19
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/29052744/tibiofemoral-joint-congruence-is-lower-in-females-with-acl-injuries-than-males-with-acl-injuries
#20
Antoine Schneider, Salim Si-Mohamed, Robert A Magnussen, Sebastien Lustig, Philippe Neyret, Elvire Servien
PURPOSE: Previous research has demonstrated that women have a higher risk of anterior cruciate ligament (ACL) injury than men. Tibiofemoral articular geometry may play a role in the occurrence of ACL tears. The purpose of this study was to analyze the gender-specific geometric characteristics differences in tibiofemoral morphology in ACL-deficient patients. METHODS: Medial tibial slope (MTS), lateral tibial slope (LTS), medial tibial plateau concavity, medial and lateral femoral condyle convexity, and lateral plateau convexity were analyzed in 276 patients with complete ACL injuries (138 females and 138 males)...
October 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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