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https://www.readbyqxmd.com/read/28812037/a-retrospective-analysis-of-concurrent-pathology-in-acl-reconstructed-knees-of-elite-alpine-ski-racers
#1
Matthew J Jordan, Patricia Doyle-Baker, Mark Heard, Per Aagaard, Walter Herzog
BACKGROUND: Anterior cruciate ligament (ACL) tear is the most frequent injury in alpine ski racing, and there is a high prevalence of ACL reinjury. Limited data exist on the concurrent pathology with primary ACL tears in elite alpine ski racers and the magnitude of injury progression after primary ACL reconstruction (ACLR). PURPOSE: To evaluate (1) the involvement of intra-articular and multiligament pathologies at the time of primary ACLR, (2) the subsequent progression in meniscal/chondral injuries, and (3) the occurrence of ACL reinjury in elite alpine ski racers...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28782060/impacts-of-interleukin-17-neutralization-on-the-inflammatory-response-in-a-healing-ligament
#2
Anna Eb Clements, Connie S Chamberlain, Ellen M Leiferman, William L Murphy, Ray Vanderby
In this study, we sought to improve ligament healing by modulating the inflammatory response after acute injury through the neutralization of Interleukin-17 (IL-17), which we hypothesized would decrease inflammatory cell infiltration and cytokine production. Administration of an Interleukin-17 neutralizing antibody (IL-17 NA) immediately following a rat medial collateral ligament (MCL) transection resulted in alterations in inflammatory cell populations and cytokine expression within the healing ligament, but did not reduce inflammation...
May 2017: J Cytokine Biol
https://www.readbyqxmd.com/read/28770510/the-posterior-bundle-of-the-elbow-medial-collateral-ligament-biomechanical-study-and-proposal-for-a-new-reconstruction-surgical-technique
#3
A Sard, E Dutto, R Rotini, S Vanni, S Pastorelli, B Battiston
BACKGROUND: The medial collateral ligament (MCL) is one of the primary elbows stabilizers. It is composed of an anterior bundle (AB), a posterior bundle (PB) and a transverse bundle. In elbow dislocations, until today MCL reconstruction has addressed the AB only. The purpose of this paper is to understand the biomechanical role of the PB of the MCL and to propose a new surgical technique for the simultaneous reconstruction of the anterior and posterior bundles, preventing the risk of recurrent posterior dislocation or posteromedial rotational instability (PMRI)...
August 2, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28763520/effect-of-a-calcaneo-tibial-screw-on-medial-and-lateral-stability-of-the-canine-tarsocrural-joint-ex-vivo
#4
Kevin R Frame, Janis P Bridges, Andrew J Worth
OBJECTIVE: To evaluate the use of a temporary calcaneo-tibial screw for stabilization of the tarsocrural joint in dogs with surgically treated collateral ligament injury. METHODS: The degree of varus and valgus laxity of the tarsocrural joint in various states of injury and stabilization was measured in paired cadaveric limbs of Greyhound dogs. The angle of varus or valgus laxity was calculated following simulated collateral ligament injury (long collateral ligament only, long and short collateral ligaments, and bilateral long and short collateral ligaments) and stabilization with a calcaneo-tibial screw...
August 1, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28746219/clinical-outcomes-of-medial-collateral-ligament-injury-in-total-knee-arthroplasty
#5
Xiaomeng Wang, Huixin Liu, Pengkai Cao, Chang Liu, Zhenyue Dong, Jianchao Qi, Fei Wang
Intraoperative injury to the medial collateral ligament (MCL) during total knee arthroplasty (TKA) is a rare but severe complication. The main treatment methods are primary repair and revision with a more constrained implant; however, the clinical outcomes of primary reconstruction without a constrained implant have rarely been reported.A retrospective study was performed to evaluate the prevalence of iatrogenic injury to the MCL during primary TKA, and to report the clinical outcomes of MCL reconstruction without the use of a constrained device...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28735845/anterior-and-posterior-bands-of-the-anterior-bundle-in-the-elbow-ulnar-collateral-ligament-ultrasound-anatomy
#6
Masahito Yoshida, Hideyuki Goto, Tetsuya Takenaga, Atsushi Tsuchiya, Katsumasa Sugimoto, Volker Musahl, Freddie Fu, Takanobu Otsuka
BACKGROUND: The anterior oblique bundle (AOL) of the ulnar collateral ligament (UCL) is composed of anterior and posterior bands. This study evaluated the anatomy of the anterior and posterior bands in the AOL of the UCL for their separate visualization with ultrasound (US). METHODS: We dissected 18 cadaveric elbow joints and recorded the direction of each band from the lateral view to determine the proper position for the US transducer. To determine the proper inclination of the transducer, we measured the inclinations of each band at the proximal and distal insertions from the transverse view...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734533/changes-in-pitching-mechanics-after-ulnar-collateral-ligament-reconstruction-in-major-league-baseball-pitchers
#7
Daniel A Portney, Jake M Lazaroff, Lucas T Buchler, Stephen M Gryzlo, Matthew D Saltzman
BACKGROUND: Medial ulnar collateral ligament (UCL) reconstruction is a common procedure performed on Major League Baseball pitchers. Variations in pitching mechanics before and after UCL reconstructive surgery are not well understood. METHODS: Publicly available pitch tracking data (PITCHf/x) were compared for all Major League Baseball pitchers who underwent UCL reconstruction between 2008 and 2013. Specific parameters analyzed were fastball percentage, release location, velocity, and movement of each pitch type...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28730863/non-operative-management-of-ulnar-collateral-ligament-injuries-in-the-throwing-athlete
#8
Mia Smucny, Robert W Westermann, Matthew Winters, Mark S Schickendantz
Medial ulnar collateral ligament (UCL) injuries have become increasingly prevalent in overhead athletes. The orthopaedic literature contains a wealth of information on operative management of these injuries. However, there are few high-quality longitudinal studies on non-operative care of UCL injuries. The purpose of this review is to describe the non-operative approach to managing UCL injuries, including recommended rehabilitation strategies and predictors of successful non-operative treatment.
July 21, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28730295/incarceration-of-the-medial-collateral-ligament-in-the-intercondylar-notch-following-proximal-avulsion
#9
Edward Walton, Martin Williams, James R Robinson
Intra-articular entrapment of the medial collateral ligament (MCL) is a rare but recognised complication of traumatic injury to the posteromedial corner (PMC) of the knee. Considering the MCL is the most commonly injured ligament of the knee this complication is extremely rare with only a handful of cases describing MCL entrapment following distal avulsion of the MCL. We present the first known case of MCL entrapment following proximal avulsion of the MCL and posterior oblique ligament (POL) with the mid-substance of the MCL becoming entrapped in the joint, lying on the superior surface of the medial meniscus and extending up into the intercondylar notch...
July 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28696495/robotic-arm-assisted-total-knee-arthroplasty-demonstrated-soft-tissue-protection
#10
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/28689821/role-of-the-lateral-collateral-ligament-in-posteromedial-rotatory-instability-of-the-elbow
#11
Enrico Bellato, Youngbok Kim, James S Fitzsimmons, Alexander W Hooke, Lawrence J Berglund, Daniel R Bachman, Shawn W O'Driscoll
BACKGROUND: Posteromedial rotatory instability (PMRI) of the elbow consists of an anteromedial coronoid fracture with lateral collateral ligament (LCL) and posterior bundle of the medial collateral ligament (PMCL) tears. We hypothesized that the LCL tear is required for elbow subluxation/joint incongruity and that an elbow affected by an anteromedial subtype 2 coronoid fracture and a PMCL tear exhibits contact pressures different from both an intact elbow and an elbow affected by PMRI...
September 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28670649/mesenchymal-stem-cell-therapy-on-tendon-ligament-healing
#12
Connie S Chamberlain, Erin E Saether, Erdem Aktas, Ray Vanderby
A normal healing response after ligament and tendon rupture results in scar formation and an inferior tissue that fails to emulate its original structure, composition, and function. More regenerative healing (closer to the original) can be obtained through early suppression of inflammatory cells and associated cytokines. Examination of the immune mediated response of mesenchymal stem/stromal cells (MSCs) during healing indicates that MSCs reprogram macrophages from a pro-inflammatory M1 phenotype to an anti-inflammatory M2 phenotype...
May 2017: J Cytokine Biol
https://www.readbyqxmd.com/read/28656567/varus-valgus-instability-in-the-anterior-cruciate-ligament-deficient-knee-effect-of-posterior-tibial-load
#13
Tomoki Ohori, Tatsuo Mae, Konsei Shino, Yuta Tachibana, Hiromichi Fujie, Hideki Yoshikawa, Ken Nakata
BACKGROUND: Anterior cruciate ligament (ACL) injury is often accompanied with medial collateral ligament (MCL) injury. Assessment of varus-valgus (V-V) instability in the ACL-deficient knee is crucial for the management of the concomitant ACL-collateral ligaments injury. We evaluated the V-V laxity and investigated the effect of additional posterior tibial load on the laxity in the ACL-deficient knee. Our hypothesis was that the V-V laxity in the ACL-deficient knee was greater than that in the intact knee and attenuated by additional posterior tibial load...
December 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28651635/an-anatomical-like-triangular-vector-ligament-reconstruction-for-the-medial-collateral-ligament-and-the-posterior-oblique-ligament-injury-with-single-femoral-tunnel-a-retrospective-study
#14
Hongtao Xu, Kai Kang, Jian Zhang, Dongmei Xin, Wei Liu, Guorong Jin, Jiangtao Dong, Shijun Gao
BACKGROUND: The purpose of this study was to evaluate the clinical outcomes of anatomical-like triangular-vector ligament reconstruction (TLR) in treating the combined injury of medial collateral ligament (MCL) and posterior oblique ligament (POL). METHODS: During July 2013 to May 2014, 26 patients who received anatomical-like TLR were included into this study. All patients received clinical physical examination, imaging examination, and knee joint function score both preoperative and follow-up...
June 26, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28634742/outcomes-of-coronoid-first-repair-in-terrible-triad-injuries-of-the-elbow
#15
Junren Zhang, Mark Tan, Ernest Beng Kee Kwek
BACKGROUND: Clinical outcomes of terrible triad injuries (TTIs) of the elbow are historically poor. To date, it is still debatable whether the coronoid needs to be fixed and if so, how and in which sequence. METHODOLOGY: Between 2010 and 2013, 13 patients were treated surgically for acute TTIs of the elbow at a Tertiary Level 1 Trauma Centre by a single surgeon, using a standardized protocol, which included coronoid-brachialis complex fixation via pull-through trans-osseous sutures, radial head fixation or prosthetic replacement and a repair of the lateral ulnar collateral ligament...
June 20, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28607764/chronic-medial-instability-of-the-elbow
#16
REVIEW
Felix H Savoie, Michael O'Brien
Damage to the medial collateral ligament of the elbow from an instability episode usually heals with non-operative treatment. In some cases, residual instability may occur, leading to functional impairment.Non-operative management can be successful when bracing, taping and therapy are used to stabilise the elbow.A recent report detailing the efficacy of platelet-rich plasma in effectively treating ulnar collateral ligament (UCL) injuries in throwers has shown promise. However, there remain specific groups that should be considered for repair or reconstruction...
January 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28603786/how-anterior-cruciate-ligament-injury-was-averted-during-knee-collapse-in-a-nba-point-guard
#17
Nathan D Schilaty, Nathaniel A Bates, Aaron J Krych, Timothy E Hewett
Non-contact anterior cruciate ligament (ACL) injuries occur with rapid decelerations and pivoting. A recent injury to a high-level National Basketball Association (NBA) player demonstrated neuromuscular control and injury-sparing mechanisms that resulted in only minor ligament injury to the medial collateral ligament. We analyzed biomechanical mechanisms via publically available orthogonal 2-D video to demonstrate how this potential ACL injury was averted. Analysis of the knee injury mechanism demonstrated that the NBA player experienced low ground reaction force, high sagittal plane flexion, and maintenance of frontal plane stability with neuromuscular control...
2017: Ann Musculoskelet Med
https://www.readbyqxmd.com/read/28600588/-open-reduction-and-internal-fixation-of-lateral-tibial-plateau-fractures-with-free-subchondral-2-7%C3%A2-mm-screws
#18
M Reul, F Johnscher, S Nijs, H Hoekstra
OBJECTIVES: Exact reconstruction of the depressed articular surface and stable subchondral fixation of the lateral tibial plateau (ORIF, "open reduction and internal fixation"). INDICATIONS: Tibial plateau fractures with involvement of the lateral column and depression of the articular surface. CONTRAINDICATIONS: Critical soft tissue. Severe osteoporosis. SURGICAL TECHNIQUE: Supine position, classical anterolateral approach, lateral submeniscal arthrotomy, visualisation of the fracture, osteotomy of the lateral tibial condyle...
June 9, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28580251/multiligament-reconstruction-of-the-knee-in-the-setting-of-knee-dislocation-with-a-medial-sided-injury
#19
Marcio B Ferrari, Jorge Chahla, Justin J Mitchell, Gilbert Moatshe, Jacob D Mikula, Daniel Cole Marchetti, Robert F LaPrade
Multiple ligament knee injuries are complex pathologies that often result from traumatic knee dislocations. Both a high level of suspicion and a thorough clinical and radiographic examination are mandatory to diagnose and identify all injured structures. Reconstruction of all injured ligaments is recommended to aid in early mobilization and to avoid joint stiffness or graft failure. For knee dislocations involving injury to the anterior cruciate ligament, posterior cruciate ligament, and medial-sided structures, a repair and augmentation of the medial collateral ligament, together with an anatomic reconstruction of the anterior cruciate ligament and double-bundle posterior cruciate ligament, is recommended...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28579262/contact-forces-in-the-tibiofemoral-joint-from-soft-tissue-tensions-implications-to-soft-tissue-balancing-in-total-knee-arthroplasty
#20
Matthias A Verstraete, Patrick A Meere, Gaia Salvadore, Jan Victor, Peter S Walker
Proper tension of the knee's soft tissue envelope is important during total knee arthroplasty; incorrect tensioning potentially leads to joint stiffness or instability. The latter remains an important trigger for revision surgery. The use of sensors quantifying the intra-articular loads, allows surgeons to assess the ligament tension at the time of surgery. However, realistic target values are missing. In the framework of this paper, eight non-arthritic cadaveric specimens were tested and the intra-articular loads transferred by the medial and lateral compartment were measured using custom sensor modules...
May 23, 2017: Journal of Biomechanics
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