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Joint laxity

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https://www.readbyqxmd.com/read/29448916/tensioning-of-the-radioscaphocapitate-and-long-radio-lunate-ligaments-for-dynamic-radiocarpal-instability
#1
Carin Rubensson, Torsten Johansson, Lars Adolfsson
During 1994-2003, we treated 20 patients with post-traumatic radial-sided wrist pain and dynamic radiocarpal instability. After arthroscopy confirmed no disruption of the radioscaphocapitate ligament and an increased laxity of the ligament, we passed a strip of the radioscaphocapitate ligament through the long radio-lunate ligament. The rationale of this procedure was to increase tension of the two ligaments and to close the space of Poirier. Eighteen patients were assessed after 1-3.7 years (mean 2.5 years)...
January 1, 2018: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29443845/raising-the-joint-line-in-tka-is-associated-with-mid-flexion-laxity-a-study-in-cadaver-knees
#2
Thomas Luyckx, Hilde Vandenneucker, Lennart Scheys Ing, Evie Vereecke, Arnout Victor Ing, Jan Victor
BACKGROUND: In a typical osteoarthritic knee with varus deformity, distal femoral resection based off the worn medial femoral condyle may result in an elevated joint line. In a setting of fixed flexion contracture, the surgeon may choose to resect additional distal femur to obtain extension, thus purposefully raising the joint line. However, the biomechanical effect of raising the joint line is not well recognized. QUESTIONS/PURPOSES: (1) What is the effect of the level of the medial joint line (restored versus raised) on coronal plane stability of a TKA? (2) Does coronal alignment technique (mechanical axis versus kinematic technique) affect coronal plane stability of the knee? (3) Can the effect of medial joint-line elevation on coronal plane laxity be predicted by an analytical model? METHODS: A TKA prosthesis was implanted in 10 fresh frozen nonarthritic cadaveric knees with restoration of the medial joint line at its original level (TKA0)...
March 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29443383/a-b3galt6-variant-in-patient-originally-described-as-al-gazali-syndrome-and-implicating-the-er-quality-control-in-the-mechanism-of-some-%C3%AE-3galt6-pathy-mutations
#3
A Ben-Mahmoud, S Ben-Salem, M Al-Sorkhy, A John, B R Ali, L Al-Gazali
Al-Gazali syndrome encompasses several clinical features including prenatal growth retardation, large joints contractures with camptodactyly, bilateral talipes equinovarus, small mouth, anterior segment anomalies of the eyes, and early lethality. Recently, a baby with features very similar to Al-Gazali syndrome was found to have compound heterozygous variants in B3GALT6. This gene encodes Beta-1,3-galactosyltransferase 6 (β3GalT6), an essential component of the glycosaminoglycan synthesis pathway. Pathogenic variants in B3GALT6 have also been shown to cause Ehlers-Danlos syndrome spondylodysplastic type (spEDS-B3GALT6) and spondylo-epimetaphyseal dysplasia with joint laxity type I (SEMD-JL1)...
February 14, 2018: Clinical Genetics
https://www.readbyqxmd.com/read/29420759/non-modifiable-risk-factors-associated-with-sternoclavicular-joint-dislocations-in-the-u-s-military
#4
Baris Gun, Robert Dean, Beatrice Go, Catherine Richardson, Brian R Waterman
INTRODUCTION: Sternoclavicular joint (SCJ) dislocations, although uncommon, are observed in patients with ligamentous laxity as well as those who experience traumatic injuries. The incidence and epidemiology of this costly and debilitating injury to our relatively young and active military population have not previously been reported. The purpose of this study is to consider and quantify the non-modifiable risk factors associated with this injury. METHODS: Using Defense Medical Epidemiological Database, first-time occurrences, from 2006 to 2015 for the ICD-9-CM code 839...
February 6, 2018: Military Medicine
https://www.readbyqxmd.com/read/29394433/biomechanics-of-lumbar-motion-segments-in-dynamic-compression
#5
Mike W J Arun, Prasannaah Hadagali, Klaus Driesslein, William Curry, Narayan Yoganandan, Frank A Pintar
Recent epidemiology studies have reported increase in lumbar spine injuries in frontal crashes. Whole human body finite element models (FEHBM) are frequently used to delineate mechanisms of such injuries. However, the accuracy of these models in mimicking the response of human spine relies on the characterization data of the spine model. The current study set out to generate characterization data that can be input to FEHBM lumbar spine, to obtain biofidelic responses from the models. Twenty-five lumbar functional spinal units were tested under compressive loading...
November 2017: Stapp Car Crash Journal
https://www.readbyqxmd.com/read/29393547/computational-evaluation-of-tkr-stability-using-feedback-controlled-compressive-loading
#6
Irene Sintini, Clare K Fitzpatrick, Chadd W Clary, Vincenzo Parenti Castelli, Paul J Rullkoetter
Pre-clinical assessment of stability in total knee replacement is crucial for developing preferred implant performance. Current total knee replacement patients often experience joint instability that the human body addresses with compensatory strategies. Specifically, an increased quadriceps-hamstrings co-contraction serves to increase joint stability through an increased compressive force across the tibiofemoral joint. The aim of this study is to introduce a novel method to evaluate total knee replacement by determining the compressive loading required to achieve natural knee stability...
February 2, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29383441/intra-ligamentary-autologous-conditioned-plasma-and-healing-response-to-treat-partial-acl-ruptures
#7
Matthias Koch, Berardo Di Matteo, Jürgen Eichhorn, Johannes Zellner, Felix Mayr, Werner Krutsch, Leonard Achenbach, Rebecca Woehl, Michael Nerlich, Peter Angele
INTRODUCTION: Conservative treatment of partial ACL ruptures is associated with a high failure rate, and often patients undergo ACL reconstruction. ACL preservation by trephination of the ACL origin and application of Autologous Conditioned Plasma (ACP) seems to be an intriguing new treatment option to favour ACL tissue healing and avoid traditional reconstruction. The aim of this study was to describe the mid-term outcomes of this new ACL preserving technique. MATERIALS AND METHODS: Twenty-four patients (mean age 41...
January 30, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29380010/increases-in-tibial-force-imbalance-but-not-changes-in-tibiofemoral-laxities-are-caused-by-varus-valgus-malalignment-of-the-femoral-component-in-kinematically-aligned-tka
#8
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 varus-valgus (V-V) malalignment of the femoral component in kinematically aligned total knee arthroplasty (TKA) and use the results to detemine sensitivities to errors in making the distal femoral resections. Because V-V malalignment would introduce the greatest changes in the alignment of the articular surfaces at 0° flexion, the hypotheses were that the greatest increases in tibial force imbalance would occur at 0° flexion, that primarily V-V laxity would significantly change at this flexion angle, and that the tibial force imbalance would increase and laxities would change in proportion to the degree of V-V malalignment...
January 29, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29378527/inclusion-of-joint-laxity-recurrent-patellar-dislocation-and-short-distal-ulnae-as-a-feature-of-van-den-ende-gupta-syndrome-a-case-report
#9
Mohammad M Al-Qattan, Doaa F Andejani, Nadia A Sakati, Khushnooda Ramzan, Faiqa Imtiaz
BACKGROUND: Van Den Ende-Gupta Syndrome (VDEGS) is an extremely rare autosomal recessive syndrome with less than 20 reported families (approximately 40 patients) in the worldwide literature. CASE PRESENTATION: We have assessed one consanguineous Saudi family with typical features of VDEGS. Two siblings were affected with almost identical features; including blepharophimosis, arachnodactyly, flexion contractures of the elbows, camptodactyly, slender ribs, hooked lateral clavicular ends, and bilateral radial head dislocations...
January 30, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29359299/comparing-the-efficacy-of-the-total-stabilizing-and-posterior-stabilizing-knee-prostheses-in-obese-and-preobese-females-a-retrospective-cohort-study
#10
Kellen Worhacz, Marc C Jacofsky, David J Jacofsky, Sarim Ahmed
Obesity is associated with increased surgical complications that may lead to suboptimal total knee arthroplasty (TKA) outcomes. Additionally, females exhibit increased rates of severe, clinical osteoarthritis OA, along with increased ligamentous laxity. Therefore, obese females present a particularly challenging case for TKA with increased joint loads coupled with a propensity for instability. This study retrospectively analyzed knee range of motion and stability of one TKA designs with two different degrees of polyethylene conformity in the obese female population...
January 22, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29350460/three-generation-family-with-novel-contiguous-gene-deletion-on-chromosome-2p22-associated-with-thoracic-aortic-aneurysm-syndrome
#11
Bianca Quiñones-Pérez, Grace E VanNoy, Meghan C Towne, Yiping Shen, Michael N Singh, Pankaj B Agrawal, Sharon E Smith
Latent transforming growth factor binding proteins (LTBP) are a family of extracellular matrix glycoproteins that play an important role in the regulation of transforming growth factor beta (TGF-ß) activation. Dysregulation of the TGF-ß pathway has been implicated in the pathogenesis of inherited disorders predisposing to thoracic aortic aneurysms syndromes (TAAS) including Marfan syndrome (MFS; FBN1) and Loeys-Dietz syndrome (LDS; TGFBR1, TGFBR2, TGFB2, TGFB3, SMAD2, SMAD3). While these syndromes have distinct clinical criteria, they share clinical features including aortic root dilation and musculoskeletal findings...
January 19, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29343450/paediatric-physeal-sparing-posterior-cruciate-ligament-pcl-reconstruction-with-parental-donation-allograft-rationale-and-operative-approach
#12
R S Khakha, S K Yasen, A J Wilson
BACKGROUND: Paediatric PCL injuries are rare but constitute a significant management challenge. We describe a novel approach to the surgical management of an 11-year-old boy who presented with persisting symptomatic instability following 18months of failed conservative therapy. METHODS: PCL reconstruction was performed using a physeal sparing, all-inside technique under fluoroscopic control. This avoids the potential for iatrogenic growth injury. A parentally donated hamstrings allograft was used to ensure adequate graft size, and reinforced using a non-elastic two millimetre braided suture...
January 14, 2018: Knee
https://www.readbyqxmd.com/read/29326877/natural-history-of-morquio-a-patient-with-tracheal-obstruction-from-birth-to-death
#13
Caitlin Doherty, Lauren W Averill, Mary Theroux, William G Mackenzie, Christian Pizarro, Robert W Mason, Shunji Tomatsu
Morquio A syndrome (mucopolysaccharidosis IVA, MPS IVA) is a lysosomal storage disease caused by a deficiency of N-acetylgalactosamine-6-sulfate sulfatase, resulting in systemic accumulation of the partially degraded glycosaminoglycans (GAGs), keratan sulfate and chondroitin-6-sulfate. The accumulation of these GAGs leads to distinguishing features as skeletal dysplasia with disproportionate dwarfism, short neck, kyphoscoliosis, pectus carinatum, tracheal obstruction, coxa valga, genu valgum, and joint laxity...
March 2018: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/29325691/predictors-of-recurrent-sprains-after-an-index-lateral-ankle-sprain-a-longitudinal-study
#14
Fereshteh Pourkazemi, Claire E Hiller, Jacqueline Raymond, Deborah Black, Elizabeth J Nightingale, Kathryn M Refshauge
OBJECTIVE: To explore and identify the predictors of ankle sprain after an index (first) lateral ankle sprain. DESIGN: Prospective cohort study, Level of evidence II. SETTING: Musculoskeletal research laboratory at the University of Sydney. PARTICIPANTS: A sample of convenience (70 controls, 30 with an index sprain) was recruited. METHODS: Potential predictors of ankle sprain were measured including: demographic measures, perceived ankle instability, ankle joint ligamentous laxity, passive range of ankle motion, balance, proprioception, motor planning and control, and inversion/eversion peak power...
November 2, 2017: Physiotherapy
https://www.readbyqxmd.com/read/29325189/comparison-of-three-methods-to-quantify-laxity-in-the-canine-hip-joint
#15
Bart J G Broeckx, Aldo Vezzoni, Evelien Bogaerts, Mileva Bertal, Tim Bosmans, Emmelie Stock, Dieter Deforce, Luc Peelman, Jimmy H Saunders
OBJECTIVES:  Comparison of PennHIP and a novel method to diagnose hip laxity, called the Vezzoni modified Badertscher distension device technique. METHODS:  In a total of 10 dogs, it was first assessed whether the distraction index (DI) from the PennHIP evaluation center could be reproduced by two individual observers. In the next two steps, the DI measurements made by the individual observers and the PennHIP evaluation center were compared with the laxity index (LI) measured on the Vezzoni modified Badertscher distension device view...
January 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/29309831/mutant-cartilage-oligomeric-matrix-cartilage-comp-compromises-bone-integrity-joint-function-and-the-balance-between-adipogenesis-and-osteogenesis
#16
Francoise Coustry, Karen L Posey, Tristan Maerz, Kevin Baker, Annie M Abraham, Catherine G Ambrose, Sabah Nobakhti, Sandra J Shefelbine, Xiaohong Bi, Michael Newton, Karissa Gawronski, Lindsay Remer, Alka C Veerisetty, Mohammad G Hossain, Frankie Chiu, Jacqueline T Hecht
Mutations in COMP (cartilage oligomeric matrix protein) cause severe long bone shortening in mice and humans. Previously, we showed that massive accumulation of misfolded COMP in the ER of growth plate chondrocytes in our MT-COMP mouse model of pseudoachondroplasia (PSACH) causes premature chondrocyte death and loss of linear growth. Premature chondrocyte death results from activation of oxidative stress and inflammation through the CHOP-ER pathway and is reduced by removing CHOP or by anti-inflammatory or antioxidant therapies...
January 5, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29285943/-assessment-of-sacroiliacal-joint-mobility-in-patients-with-low-back-pain
#17
Máté Burkus, István Márkus, Bálint Niklai, Miklós Tunyogi-Csapó
INTRODUCTION: Sagittal alignment of the pelvis is typically characterized using three fundamental parameters. Among these, pelvic incidence is traditionally considered to be anatomically 'constant'. AIM: We aimed to analyze the pelvic parameters of low back pain patients with suspected sacroiliac joint laxity. METHOD: Pelvic parameters were assessed in standing and seated EOS 2D/3D radiographs of 48 cases of persistent low back pain, and compared to upper body position using cluster analysis and t-test...
December 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29285587/the-percutaneous-pie-crusting-medial-release-during-arthroscopic-procedures-of-the-medial-meniscus-does-neither-affect-valgus-laxity-nor-clinical-outcome
#18
Sang-Woo Jeon, Min Jung, Yong-Min Chun, Su-Keon Lee, Woo Seok Jung, Chong Hyuk Choi, Sung-Jae Kim, Sung-Hwan Kim
PURPOSE: To analyze the effect of percutaneous pie-crusting medial release on valgus laxity before and after surgery and on clinical outcomes. METHODS: Eight-hundred fourteen consecutive patients who underwent an arthroscopic procedure for the medial compartment of the knee were evaluated retrospectively. Sex, age, type of operation (meniscectomy, meniscal repair, and posterior root repair), type of accompanying surgery (none, cartilage procedure, ligament procedure and osteotomy) were documented...
December 28, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29275432/aetiopathogenesis-of-cuff-tear-arthropathy-could-juvenile-joint-laxity-be-considered-a-predisposing-factor
#19
Stefano Gumina, Alessandro Castagna, Vittorio Candela, Teresa Venditto, Giuseppe Giannicola, Mario Borroni, Ciro Villani
PURPOSE: Although many hypotheses have been formulated, aetiopathogenesis of cuff-tear arthropathy (CTA) is still motive for discussion. Since prevalence of CTA is notoriously higher in women, as is joint hypermobility, we hypothesised a possible correlation between the two conditions. METHODS: One hundred thirty-three (n = 133) consecutive patients with glenohumeral osteoarthritis [48 men, 85 women; mean age (SD) 72.32 (7.05)] were divided into two groups: Groups 1 (CTA) and 2 (concentric shoulder arthropathy) comprised 71 (22 men, 49 women) and 62 (26 men, 36 women), respectively...
December 23, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/29273291/balanced-flexion-and-extension-gaps-are-not-always-of-equal-size
#20
Tracy L Kinsey, Ormonde M Mahoney
BACKGROUND: It has been widely accepted in total knee arthroplasty (TKA) that flexion and extension gaps in the disarticulated knee during surgery should be equalized. We hypothesized that tensioning during assessment of the flexion gap can induce temporary widening of the gap due to posterior tibial translation. We aimed to describe posterior tibial translation at flexion gap (90°) assessments and assess the correlation of tibial translation with laxity (flexion space increase) using constrained and non-constrained inserts...
November 8, 2017: Journal of Arthroplasty
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