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https://www.readbyqxmd.com/read/28451605/the-impact-of-osseous-malalignment-and-realignment-procedures-in-knee-ligament-surgery-a-systematic-review-of-the-clinical-evidence
#1
REVIEW
Thomas Tischer, Jochen Paul, Dietrich Pape, Michael T Hirschmann, Andreas B Imhoff, Stefan Hinterwimmer, Matthias J Feucht
BACKGROUND: Failure rates of knee ligament surgery may be high, and the impact of osseous alignment on surgical outcome remains controversial. Basic science studies have demonstrated that osseous malalignment can negatively affect ligament strain and that realignment procedures may improve knee joint stability. HYPOTHESIS/PURPOSE: The purpose of this review was to summarize the clinical evidence concerning the impact of osseous malalignment and realignment procedures in knee ligament surgery...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28447141/the-iliotibial-band-and-anterolateral-capsule-have-a-combined-attachment-to-the-segond-fracture
#2
Marcio Albers, Humza Shaikh, Elmar Herbst, Kentaro Onishi, Kanto Nagai, Volker Musahl, Freddie H Fu
The purpose of this report was to describe the injury mechanism, surgical findings, and outcomes in a 21-year-old professional female football player who presented with a complete anterior cruciate ligament (ACL) rupture and Segond fracture. Interview and video analysis were performed to elicit the injury mechanism. Clinical examination and imaging revealed a complete ACL tear, Segond fracture, lateral meniscus tear, MCL sprain, and posterolateral corner sprain. Examination under anaesthesia revealed Grade 2 pivot shift and varus/valgus instability...
April 26, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28361277/the-effect-of-a-dynamic-pcl-brace-on-patellofemoral-compartment-pressures-in-pcl-and-pcl-plc-deficient-knees
#3
Tyler Welch, Thomas Keller, Ruben Maldonado, Melodie Metzger, Karen Mohr, Ronald Kvitne
BACKGROUND: The natural history of posterior cruciate ligament (PCL) deficiency includes the development of arthrosis in the patellofemoral joint (PFJ). The purpose of this biomechanical study was to evaluate the hypothesis that dynamic bracing reduces PFJ pressures in PCL- and combined PCL/posterolateral corner (PLC)-deficient knees. STUDY DESIGN: Controlled Laboratory Study. METHODS: Eight fresh frozen cadaveric knees with intact cruciate and collateral ligaments were included...
December 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28335461/design-and-validation-of-a-low-cost-portable-device-to-quantify-postural-stability
#4
Yong Zhu
Measurement of the displacement of the center-of-pressure (COP) is an important tool used in biomechanics to assess postural stability and human balance. The goal of this research was to design and validate a low-cost portable device that can offer a quick indication of the state of postural stability and human balance related conditions. Approximate entropy (ApEn) values reflecting the amount of irregularity hiding in COP oscillations were used to calculate the index. The prototype adopted a portable design using the measurements of the load cells located at the four corners of a low-cost force platform...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28224067/repair-of-rotator-cuff-tear-with-delamination-independent-repairs-of-the-infraspinatus-and-articular-capsule
#5
Tomoyuki Mochizuki, Akimoto Nimura, Takashi Miyamoto, Hideyuki Koga, Keiichi Akita, Takeshi Muneta
We propose a technique to repair delamination, which often occurs during rotator cuff repair surgery. We have reported that the infraspinatus occupies most of the greater tuberosity with the articular capsule attached to a very wide area, and that the superficial layer is mainly composed of the infraspinatus, and the deep layer is mainly composed of the articular capsule. To repair such delamination with consideration of the detailed anatomy, we developed the following repair method with independent repair of the superficial layer (infraspinatus) and the deep layer (articular capsule): (1) the deep layer is pulled laterally and joined to the medial margin of the greater tuberosity using 4 simple sutures from 2 anchors; (2) the paired limbs (same color) of 4 knots are passed over the posterior leaf of the superficial layer at intervals; (3) a push-in anchor loaded with 1 thread each of 4 knots is placed on the anterolateral corner of the greater tuberosity to pull the superficial layer anterolaterally; (4) another push-in anchor (remaining threads) is pushed on the posterior corner of the greater tuberosity...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28183110/a-new-species-of-i-lucasioides-i-kwon-isopoda-oniscidea-agnaridae-from-china
#6
Weichun Li
Lucasioides nudus sp. n. is described from Jiangxi Province, China. The new species can be diagnosed by the cephalon having a well-developed median lobe, the pereonite 1 with acutely postero-lateral corners and sinuous posterior margin of epimeron, the male pleopod 1 endopod without setules, and the bilobed exopod with the outer lobe much shorter and broader than the acute triangular inner lobe.
January 10, 2017: Zootaxa
https://www.readbyqxmd.com/read/28116264/failure-of-polyethelene-insert-locking-mechanism-after-a-posterior-stabilised-total-knee-arthroplasty-a-case-report
#7
Gurava Reddy Ay, Soundar Rajan D, Chiranjeevi T, Karthik C, Krishna Kiran E
INTRODUCTION: Disengagement of polyethylene insert used in total knee arthroplasty is a rare but serious complication. Still rarer is disengagement because of failure of tibial insert locking mechanism. We report a previously unpublished complication of polyethylene insert locking mechanism failure in a 10-months-old posterior stabilized total knee arthroplasty in a 70-year-old woman with osteoarthritis for whom Attune (Depuy) knee implant was used. CASE PRESENTATION: A 70-year-old female underwent (Attune, Depuy) primary bilateral posterior stabilised total knee arthroplasty in a private hospital...
July 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28077395/the-effects-of-posterior-cruciate-ligament-deficiency-on-posterolateral-corner-structures-under-gait-and-squat-loading-conditions-a-computational-knee-model
#8
K-T Kang, Y-G Koh, M Jung, J-H Nam, J Son, Y H Lee, S-J Kim, S-H Kim
OBJECTIVES: The aim of the current study was to analyse the effects of posterior cruciate ligament (PCL) deficiency on forces of the posterolateral corner structure and on tibiofemoral (TF) and patellofemoral (PF) contact force under dynamic-loading conditions. METHODS: A subject-specific knee model was validated using a passive flexion experiment, electromyography data, muscle activation, and previous experimental studies. The simulation was performed on the musculoskeletal models with and without PCL deficiency using a novel force-dependent kinematics method under gait- and squat-loading conditions, followed by probabilistic analysis for material uncertain to be considered...
January 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28054459/a-new-species-of-the-giant-deep-sea-isopod-genus-bathynomus-a-milne-edwards-1879-crustacea-isopoda-cirolanidae-from-hainan-island-south-china-sea
#9
Qi Kou, Jun Chen, Xinzheng Li, Lisheng He, Yong Wang
Several specimens of the giant deep-sea isopod genus Bathynomus were collected by a deep-sea lander at a depth of 898 m from Hainan Island, northern South China Sea. After careful examination, this material and the specimens collected from Gulf of Aden, north-western Indian Ocean, previously reported as Bathynomus sp., were identified to be the same as a new species to the genus. Bathynomus jamesi sp. nov. can be distinguished from the congeners by the distal margin of pleotelson with 11 or 13 short straight spines and central spine not bifid; uropodal endopod and exopod with distolateral corner slightly pronounced; clypeus with lateral margins concave; and antennal flagellum extending when extended posteriorly reaches the pereonite 3...
January 5, 2017: Integrative Zoology
https://www.readbyqxmd.com/read/28050573/relationship-between-the-middle-genicular-artery-and-the-posterior-structures-of-the-knee-a-cadaveric-study
#10
Rogério Teixeira de Carvalho, Leonardo Addêo Ramos, João Victor Novaretti, Leandro Masini Ribeiro, Paulo Roberto de Queiroz Szeles, Sheila Jean McNeill Ingham, Rene Jorge Abdalla
BACKGROUND: The middle genicular artery (MGA) is responsible for the blood supply to the cruciate ligaments and synovial tissue. Traumatic sports injuries and surgical procedures (open and arthroscopic) can cause vascular damage. Little attention has been devoted to establish safe parameters for the MGA. PURPOSE: To investigate the anatomy of the MGA and its relation to the posterior structures of the knees, mainly the posterior capsule and femoral condyles, and to establish safe parameters to avoid harming the MGA...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27984448/novel-spiked-washer-repair-is-biomechanically-superior-to-suture-and-bone-tunnels-for-arcuate-fracture-repair
#11
Saman Vojdani, Laviel Fernandez, Jian Jiao, Tyler Enders, Steven Ortiz, Liangjun Lin, Yi-Xian Qin, David E Komatsu, James Penna, Charles J Ruotolo
OBJECTIVES: Injuries to the posterolateral corner of the knee can lead to chronic degenerative changes, external rotation instability, and varus instability if not repaired adequately. A proximal fibula avulsion fracture, referred to as an arcuate fracture, has been described in the literature, but a definitive repair technique has yet to be described. The objective of this study was to present a novel arcuate fracture repair technique, using a spiked-washer with an intramedullary screw, and to compare its biomechanical integrity to a previously described suture and bone tunnel method...
March 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27774441/changes-of-lip-morphology-following-mandibular-setback-surgery-using-3d-cone-beam-computed-tomography-images
#12
Seung Jae Paek, Ji Yong Yoo, Jang Won Lee, Won-Jong Park, Young Deok Chee, Moon Gi Choi, Eun Joo Choi, Kyung-Hwan Kwon
BACKGROUND: The aims of this study are to evaluate the lip morphology and change of lip commissure after mandibular setback surgery (MSS) for class III patients and analyze association between the amount of mandibular setback and change of lip morphology. METHODS: The samples consisted of 14 class III patients treated with MSS using bilateral sagittal split ramus osteotomy. Lateral cephalogram and cone-beam CT were taken before and about 6 months after MSS. Changes in landmarks and variables were measured with 3D software program Ondemand™...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27703824/spontaneous-recurrent-hemarthrosis-of-the-knee-a-report-of-two-cases-with-a-source-of-bleeding-detected-during-arthroscopic-surgery-of-the-knee-joint
#13
Eisuke Nomura, Hisatada Hiraoka, Hiroya Sakai
We report two cases of the spontaneous recurrent hemarthrosis of the knee. In these cases lateral meniscus was severely torn and a small tubular soft tissue with pulsation was identified on the synovium in the posterolateral corner during arthroscopic surgery of the knee joint. Gentle grasping of this tissue by forceps led to pulsating bleeding, which stopped by electrocoagulation. This soft tissue was considered a source of bleeding, since no recurrence of hemarthrosis was observed for more than four years after surgery...
2016: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/27685766/the-hoop-plate-for-posterior-bicondylar-shear-tibial-plateau-fractures-description-of-a-new-surgical-technique
#14
Vincenzo Giordano, Joseph Schatzker, Mauricio Kfuri
High-energy fractures of the proximal tibia with extensive fragmentation of the posterior rim of the tibial plateau are challenging. This technique aims to describe a method on how to embrace the posterior rim of the tibial plateau by placing a horizontal precontoured one-third tubular plate wrapped around its corners. This method, which we named "hoop plating," is mainly indicated for cases of crushed juxta-articular rim fractures, aiming to restore cortical containment of the tibial plateau. Through a lateral approach with a fibular head osteotomy (Lobenhoffer approach), both anterolateral and posterolateral fragments are directly reduced and supported by a one-third tubular plate of adequate length...
September 29, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27671286/popliteus-impingement-after-tka-may-occur-with-well-sized-prostheses
#15
Michel P Bonnin, Arnoud de Kok, Matthias Verstraete, Tom Van Hoof, Catherine Van der Straten, Mo Saffarini, Jan Victor
PURPOSE: To determine the mechanisms and extents of popliteus impingements before and after TKA and to investigate the influence of implant sizing. The hypotheses were that (1) popliteus impingements after TKA may occur at both the tibia and the femur, and (2) even with an apparently well-sized prosthesis, popliteal tracking during knee flexion is modified compared to the preoperative situation. METHODS: The location of the popliteus in three cadaver knees was measured using computed tomography, before and after implantation of plastic TKA replicas, by injecting the tendon with radiopaque liquid...
September 26, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27620470/morphology-of-the-fibular-insertion-of-the-posterolateral-corner-and-biceps-femoris-tendon
#16
Hirotaka Takahashi, Goro Tajima, Shuhei Kikuchi, Jun Yan, Yoichi Kamei, Moritaka Maruyama, Atsushi Sugawara, Takaaki Saigo, Minoru Doita
PURPOSE: To clarify the fibular head insertion of the fibular collateral ligament (FCL), popliteofibular ligament (PFL), and biceps femoris tendon and related osseous landmarks on three-dimensional (3-D) images. METHODS: Twenty-one non-paired, formalin-fixed human cadaveric knees were evaluated in this study. The fibular head insertions of the FCL, PFL and biceps femoris tendon were identified and marked. 3-D images were created, and the surface area, location, positional relationships, and morphology of the fibular insertions of the FCL, PFL, and biceps femoris tendon and related osseous structures were analysed...
January 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27551233/a-new-species-of-monocheres-stock-copepoda-siphonostomatoida-asterocheridae-from-shallow-waters-off-florida-usa-an-unexpected-discovery
#17
Eduardo Suárez-Morales
The rare asterocherid copepod genus Monocheres, ectosymbionts of corals and sponges, contains only two species, one from Mauritius (Indian Ocean) and the other one from Brazil (western Atlantic). From the analysis of the digestive caecum contents of the benthic hesionid polychaete Hesione picta Müller, 1858, an adult female of an undescribed species of Monocheres was unexpectedly recovered; it is the third species of this rare asterocherid genus. The new species, Monocheres sergioi sp. n., has the distinctive reduction of the fifth leg as a process with a single seta...
2016: ZooKeys
https://www.readbyqxmd.com/read/27505954/-clinical-effect-of-staged-repair-and-reconstruction-of-multiple-ligament-injuries-in-knee-joints
#18
Zhen Lai, Zhi-xiang Liu, Jun-long Yang, Zhao-fei Zhang, Yi-liang Chang
OBJECTIVE: To evaluate clinical outcomes of anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) reconstruction under arthroscopy combined with limited open repair of medial collateral ligament (MCL) for the treatment of multiple ligament injuries of knee joints. METHODS: From March 2006 and June 2012,the data of 14 patients (14 knees) with multiple injuries of ACL, PCL, and MCL were collected. There were 8 males and 6 females with an average age of (31...
May 2016: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/27489415/acute-anterior-cruciate-ligament-injuries-in-multisport-elite-players-demography-association-and-pattern-in-different-sports
#19
Ravi Gupta, Tanu Khanna, Gladson David Masih, Anubhav Malhotra, Anil Kapoor, Pawan Kumar
BACKGROUND: Anterior cruciate ligament (ACL) tear rates are known to vary from sport to sport. To the best of our knowledge, the relationship of ACL injury with different sports is not reported earlier. The objective of the present study is to investigate the association of ACL injury with different sports and to document various associated ligamentous, meniscal, and chondral lesions of the knee. MATERIALS AND METHODS: Descriptive epidemiological study was carried out in a tertiary care center over a 10-year period...
July 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/27398922/aerial-rotation-effects-on-vertical-jump-performance-among-highly-skilled-collegiate-soccer-players
#20
Leland A Barker, John R Harry, Janet S Dufek, John A Mercer
Barker, LA, Harry, JR, Dufek, JS, and Mercer, JA. Aerial rotation effects on vertical jump performance among highly skilled collegiate soccer players. J Strength Cond Res 31(4): 932-938, 2017-In soccer matches, jumps involving rotations occur when attempting to head the ball for a shot or pass from set pieces, such as corner kicks, goal kicks, and lob passes. However, the 3-dimensional ground reaction forces used to perform rotational jumping tasks are currently unknown. Therefore, the purpose of this study was to compare bilateral, 3-dimensional, and ground reaction forces of a standard countermovement jump (CMJ0) with those of a countermovement jump with a 180° rotation (CMJ180) among Division-1 soccer players...
April 2017: Journal of Strength and Conditioning Research
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