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https://www.readbyqxmd.com/read/29051903/the-anterolateral-complex-of-the-knee
#1
Elmar Herbst, Marcio Albers, Jeremy M Burnham, Freddie H Fu, Volker Musahl
BACKGROUND: Significant controversy exists regarding the anterolateral structures of the knee. PURPOSE: To determine the layer-by-layer anatomic structure of the anterolateral complex of the knee. STUDY DESIGN: Descriptive laboratory study. METHODS: Twenty fresh-frozen cadaveric knees (age range, 38-56 years) underwent a layer-by-layer dissection to systematically expose and identify the various structures of the anterolateral complex...
October 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29032422/the-deep-layer-of-the-tractus-iliotibialis-and-its-relevance-when-using-the-direct-anterior-approach-in-total-hip-arthroplasty-a-cadaver-study
#2
David Putzer, Matthias Haselbacher, Romed Hörmann, Günter Klima, Michael Nogler
INTRODUCTION: Surgical approaches through smaller incisions reveal less of the underlying anatomy, and therefore, detailed knowledge of the local anatomy and its variations is important in minimally invasive surgery. The aim of this study was to determine the location, extension, and histomorphology of the deep layer of the iliotibial band during minimally invasive hip surgery using the direct anterior approach (DAA). MATERIALS AND METHODS: The morphology of the iliotibial tract was determined in this cadaver study on 40 hips with reference to the anterior superior iliac spine and the tibia...
October 14, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28990718/limb-sparing-sarcoma-reconstruction-with-functional-composite-thigh-flaps
#3
John T Stranix, Z-Hye Lee, Gretl Lam, Joshua Mirrer, Timothy Rapp, Pierre B Saadeh
INTRODUCTION: Innervated muscle transfer can improve functional outcomes after extensive limb-sparing sarcoma resections. We report our experience using composite thigh flaps for functional reconstruction of large oncologic extremity defects. PATIENTS AND METHODS: Between 2011 and 2014, four limb-sparing oncologic resections (3 lower extremities, 1 upper extremity) underwent immediate functional reconstruction with composite thigh free flaps in three males and one female...
October 9, 2017: Microsurgery
https://www.readbyqxmd.com/read/28970120/an-anatomic-study-of-trifurcate-iliotibial-bands-for-correcting-valgus-knee-deformity
#4
Yu-Hang Zhu, Qin-Li Xu, Guo-Dong Liang, Yun-Tao Wu, You-Qiong Li, Qing-San Zhu
BACKGROUND: The iliotibial band (ITB) trifurcates into the anterior, central and posterior branches at the knee level, and sometimes the branches must be selectively released to correct the valgus knee deformity during total knee arthroplasty. However, the anatomical morphology of the trifurcate ITBs has not been investigated. METHODS: Fifty-two knees from 26 embalmed cadavers were dissected to observe and record the relationship of the three branches given off from the ITB trifurcation...
September 29, 2017: Knee
https://www.readbyqxmd.com/read/28967055/clinical-and-functional-outcomes-after-augmented-hip-abductor-tendon-repair
#5
Jay R Ebert, Thomas A Bucher, Conor J Mullan, Gregory C Janes
INTRODUCTION: Hip abductor tendon (HAT) tearing is commonly implicated in greater trochanteric pain syndrome. Surgical studies are often reported in small cohorts and with limited information on functional improvement. This study reports the clinical and functional outcomes after HAT repair. METHODS: 112 patients with symptomatic HAT tears, diagnosed via magnetic resonance imaging, underwent open bursectomy, V-Y lengthening of the iliotibial band, debridement of the diseased tendon, decortication of the trochanteric foot-plate and reattachment of the tendon with suture anchors, augmented with a LARS ligament through a trans-osseous tunnel...
September 21, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28955685/external-snapping-hip-treated-by-effective-designed-n-plasty-of-the-iliotibial-band
#6
Jong-Seok Park, Woo-Jong Kim, Dhong-Won Lee, Jae-Wan Soh, Sung-Hun Won, Sang-Woo Lee, Sang-Il Moon, Hyoung-Ye Kim
PURPOSE: The purpose of this study is to present the effective design of N-plasty of the iliotibial band and surgical results of its use as a treatment for refractory external snapping hip. MATERIALS AND METHODS: We evaluated 17 patients (24 cases) with external snapping hip who underwent N-plasty between October 2013 and May 2016 and who were followed up for at least 12 months. All patients were male and the mean age was 20.8 years. The mean duration of symptoms prior to surgical intervention was 28...
September 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28893388/the-imaging-findings-of-impingement-syndromes-of-the-lower-limb
#7
REVIEW
M De Maeseneer, S Wuertzer, J de Mey, M Shahabpour
In this article we provide an overview of impingement syndromes of the lower limb. At the level of the hip, femoroacetabular and ischiofemoral impingement are recognised. At the level of the knee, we discuss Hoffa's fat pad impingement, suprapatellar fat pad impingement, pericruciate impingement, and iliotibial band syndrome. The impingement syndromes associated with anterior cruciate ligament (ACL) repair and intercondylar osteophytes are also illustrated. Most impingement syndromes are described at the level of the ankle...
September 8, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28844344/patellofemoral-contact-pressures-after-patellar-distalization-a-biomechanical-study
#8
Justin S Yang, John P Fulkerson, Elifho Obopilwe, Andreas Voss, Jessica Divenere, Augustus D Mazzocca, Cory M Edgar
PURPOSE: To measure the patellofemoral contact pressure in early flexion after a tibial tubercle distalization osteotomy. METHODS: Ten matched-pair fresh-frozen cadaveric knees were studied. The average Blackburne-Peel ratio of the native knees was 0.91. The knees were placed on a testing rig, with a fixed femur and tibia mobile through 90° of flexion. Individual quadriceps heads and the iliotibial band were separated and loaded with 205 N in anatomic directions using a weighted pulley system...
August 22, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28809635/-clinical-results-of-endoscopic-treatment-of-greater-trochanteric-pain-syndrome
#9
P Zeman, M Rafi, P Skala, J Zeman, J Matějka, T Pavelka
PURPOSE OF THE STUDY This retrospective study aims to present short-term clinical outcomes of endoscopic treatment of patients with greater trochanteric pain syndrome (GTPS). MATERIAL AND METHODS The evaluated study population was composed of a total of 19 patients (16 women, 3 men) with the mean age of 47 years (19-63 years). In twelve cases the right hip joint was affected, in the remaining seven cases it was the left side. The retrospective evaluation was carried out only in patients with greater trochanteric pain syndrome caused by independent chronic trochanteric bursitis without the presence of m...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28789872/mechanical-analysis-of-extra-articular-knee-ligaments-part-two-tendon-grafts-used-for-knee-ligament-reconstruction
#10
Kristof Smeets, Johan Bellemans, Lennart Scheys, Bert O Eijnde, Joshua Slane, Steven Claes
OBJECTIVES: The aim of this study was to provide information about the mechanical properties of grafts used for knee ligament reconstructions and to compare those results with the mechanical properties of native knee ligaments. METHODS: Eleven cadaveric knees were dissected for the semitendinosus, gracilis, iliotibial band (ITB), quadriceps and patellar tendon. Uniaxial testing to failure was performed using a standardized method and mechanical properties (elastic modulus, ultimate stress, ultimate strain, strain energy density) were determined...
August 5, 2017: Knee
https://www.readbyqxmd.com/read/28763623/the-effects-of-anterolateral-tenodesis-on-tibiofemoral-contact-pressures-and-kinematics
#11
Eivind Inderhaug, Joanna M Stephen, Hadi El-Daou, Andy Williams, Andrew A Amis
BACKGROUND: Anterolateral tenodeses are increasingly popular in combination with intra-articular anterior cruciate ligament reconstructions. Despite the perception of risk of overconstraint and lateral osteoarthritis, evidence is lacking regarding the effect of graft tensioning on knee kinematics and intra-articular compartmental joint pressures. PURPOSE: To investigate tibiofemoral joint contact pressures and kinematics related to an anterolateral lesion and the effectiveness of a MacIntosh tenodesis in restoring these when varying (1) graft tension and (2) tibial rotation during graft fixation...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28706832/iliotibial-band-lengthening-an-arthroscopic-surgical-technique
#12
Todd P Pierce, Samuel J Mease, Kimona Issa, Anthony Festa, Vincent K McInerney, Anthony J Scillia
Iliotibial (IT) band syndrome is a common cause of lateral knee pain in runners and cyclists. Many can be treated nonoperatively; however, some may require surgical lengthening of their IT band to achieve optimal pain relief and a return to preinjury level of activity. Several studies have been published detailing surgical lengthening procedures and satisfactory outcomes after these procedures. However, it is important to continue to improve on and optimize outcomes. We present our arthroscopic IT band-lengthening procedure...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28653302/fetal-development-of-the-human-gluteus-maximus-muscle-with-special-reference-to-its-fascial-insertion
#13
Yasuhiro Shiraishi, Zhe Wu Jin, Keisuke Mitomo, Masahito Yamamoto, Gen Murakami, Hiroshi Abe, Jőrg Wilting, Shin-Ichi Abe
The human gluteus maximus muscle (GMX) is characterized by its insertion to the iliotibial tract (a lateral thick fascia of the thigh beneath the fascia lata), which plays a critical role in lateral stabilization of the hip joint during walking. In contrast, in non-human primates, the GMX and biceps femoris muscle provide a flexor complex. According to our observations of 15 human embryos and 11 fetuses at 7-10 weeks of gestation (21-55 mm), the GMX anlage was divided into 1) a superior part that developed earlier and 2) a small inferior part that developed later...
June 27, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28630835/intra-articular-fibroma-of-tendon-sheath-in-knee-joint-associated-with-iliotibial-band-friction-syndrome-rare-occurrence-in-a-teenage-girl
#14
Sameer Rathore, Vasil Quadri, Sanjay Tapadia, K Krishnaiah, V P Nithin Krishna
INTRODUCTION: Iliotibial band (ITB) friction syndrome is a common overuse injury typically seen in active athlete population. A nodular lesion on the inner side of the ITB as an etiology or an accompanying lesion with friction syndrome has rarely been reported. Among such nodular lesions around knee, fibroma of tendon sheath (FTS) is a rare occurrence. All the more intra-articular occurrence is extremely rare. CASE REPORT: A 16-year-old female presented with recurrent pain and movable nodule at the lateral joint area, diagnosed as ITB friction syndrome...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28630725/endoscopic-repair-of-hip-abductor-tears-outcomes-with-two-year-follow-up
#15
J W Thomas Byrd, Kay S Jones
Abductor lesions are increasingly recognized as a source of recalcitrant laterally based hip pain and dysfunction. There is a growing body of evidence that many of these may be amenable to endoscopic repair. To report the demographic data and outcomes of endoscopic hip abductor repair. Twelve patients underwent endoscopic abductor repair with 2-year follow-up. These patients were prospectively assessed with modified Harris hip and iHOT scores. The indications for surgery were clinical and MRI findings of symptomatic abductor tears that had failed conservative treatment...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28618309/exertion-and-pain-do-not-alter-coordination-variability-in-runners-with-iliotibial-band-syndrome
#16
Jocelyn F Hafer, Allison M Brown, Katherine A Boyer
BACKGROUND: Iliotibial band syndrome is a common overuse running injury which results in altered mechanics. While injuries alter discrete mechanics, they may also cause a change in coordination variability, the stride-to-stride organization of runners' movement patterns. Uninjured and injured runners may experience a change in coordination variability during a run to exertion due to fatigue, pain, or a combination of these factors. The aim of the current study was to determine if runners with iliotibial band syndrome and uninjured runners display different segment coordination variability across the course of a run to exertion...
August 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28609131/a-comprehensive-reanalysis-of-the-distal-iliotibial-band-quantitative-anatomy-radiographic-markers-and-biomechanical-properties
#17
Jonathan A Godin, Jorge Chahla, Gilbert Moatshe, Bradley M Kruckeberg, Kyle J Muckenhirn, Alexander R Vap, Andrew G Geeslin, Robert F LaPrade
BACKGROUND: The qualitative anatomy of the distal iliotibial band (ITB) has previously been described. However, a comprehensive characterization of the quantitative anatomic, radiographic, and biomechanical properties of the Kaplan fibers of the deep distal ITB has not yet been established. It is paramount to delineate these characteristics to fully understand the distal ITB's contribution to rotational knee stability. Purpose/Hypothesis: There were 2 distinct purposes for this study: (1) to perform a quantitative anatomic and radiographic evaluation of the distal ITB's attachment sites and their relationships to pertinent osseous and soft tissue landmarks, and (2) to quantify the biomechanical properties of the deep (Kaplan) fibers of the distal ITB...
September 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28607939/the-role-of-the-peripheral-passive-rotation-stabilizers-of-the-knee-with-intact-collateral-and-cruciate-ligaments-a-biomechanical-study
#18
Alexander R Vap, Jason M Schon, Gilbert Moatshe, Raphael S Cruz, Alex W Brady, Grant J Dornan, Travis Lee Turnbull, Robert F LaPrade
BACKGROUND: A subset of patients have clinical internal and/or external knee rotational instability despite no apparent injury to the cruciate or collateral ligaments. PURPOSE/HYPOTHESIS: The purpose of this study was to assess the effect of sequentially cutting the posterolateral, anterolateral, posteromedial, and anteromedial structures of the knee on rotational stability in the setting of intact cruciate and collateral ligaments. It was hypothesized that cutting of the iliotibial band (ITB), anterolateral ligament and lateral capsule (ALL/LC), posterior oblique ligament (POL), and posteromedial capsule (PMC) would significantly increase internal rotation, while sectioning of the anteromedial capsule (AMC) and the popliteus tendon and popliteofibular ligament (PLT/PFL) would lead to a significant increase in external knee rotation...
May 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28580252/arthroscopic-hip-labral-augmentation-technique-with-iliotibial-band-graft
#19
Renato Locks, Jorge Chahla, Jonathan M Frank, Jack Anavian, Jonathan A Godin, Marc J Philippon
The importance of the acetabular labrum has been well documented for the function and overall health of the hip joint. Several biomechanical studies have shown the sealing effect of the acetabular labrum. In the past decade, labral repair procedures have gained increased attention, with the literature suggesting that the outcomes after hip arthroscopy are directly related to labral preservation. However, a primary labral repair can be challenging in cases of hypoplastic, ossified, or complex and irreparable labral tears in which there is insufficient tissue to perform a primary repair...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28580243/reconstruction-of-the-popliteomeniscal-fascicles-for-treatment-of-recurrent-subluxation-of-the-lateral-meniscus
#20
Jun Suganuma, Yutaka Inoue, Hideaki Tani, Tadashi Sugiki, Tomoki Sassa, Reo Shibata
Recurrent subluxation of the lateral meniscus is characterized by episodes of mechanical locking of the knee joint. To completely preclude the posterior segment of the lateral meniscus from undergoing anterior dislocation during deep knee flexion, the structures to which it is attached need to be relatively taut. The posterosuperior popliteomeniscal fascicle retains its tension during deep knee flexion; therefore, reconstruction of the posterosuperior and anteroinferior popliteomeniscal fascicles was performed with an autograft harvested from the iliotibial band...
April 2017: Arthroscopy Techniques
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