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https://www.readbyqxmd.com/read/29046046/three-dimensional-evaluation-of-similarity-of-right-and-left-knee-joints
#1
Ki-Mo Jang, Jong-Hoon Park, Minho Chang, Youngjun Kim, Deukhee Lee, Sehyung Park, Joon Ho Wang
Purpose: The purpose of this study was to evaluate the anatomical similarity of three-dimensional (3D) morphometric parameters between right and left knees. Materials and Methods: Ten fresh-frozen paired cadaveric knees were tested. Following dissection, footprint areas of the anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) were measured. Surface scanning was performed using a 3D scanner. Scanned data were reproduced and morphometric parameters were measured on specialized software...
October 19, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/29046045/comparative-study-of-clinical-and-radiographic-outcomes-of-high-tibial-osteotomy-in-patients-with-kissing-lesions-and-non-kissing-lesions
#2
Oog-Jin Shon, Sang-Jin Park, Bum-Jin Shim, Dong-Yeol Lee
Purpose: High Outerbridge grade lesions of the articular cartilage have been associated with poor outcomes of high tibial osteotomy (HTO). However, there has been no report on the efficacy of HTO in the presence of kissing lesions. The purpose of this study was to compare clinical and radiographic outcomes of HTO between kissing lesion and non-kissing lesion groups. Materials and Methods: Of the patients with medial compartment osteoarthritis and varus deformity treated with HTO between 2007 and 2012, 21 cases with kissing lesions and 22 cases without kissing lesions were selected...
October 19, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/29033262/primary-stability-of-different-plate-positions-and-the-role-of-bone-substitute-in-open-wedge-high-tibial-osteotomy
#3
Ryohei Takeuchi, Jung Woon-Hwa, Hiroyuki Ishikawa, Yuichiro Yamaguchi, Katsunari Osawa, Yasushi Akamatsu, Koichi Kuroda
BACKGROUND: The purpose of this study was to compare the mechanical fixation strengths of anteromedial and medial plate positions in osteotomy, and clarify the effects of bone substitute placement into the osteotomy site. METHODS: Twenty-eight sawbone tibia models were used. Four different models were prepared: Group A, the osteotomy site was open and the plate position was anteromedial; Group B, bone substitutes were inserted into the osteotomy site and the plate position was anteromedial; Group C, the osteotomy site was open and the plate position was medial; and Group D, bone substitutes were inserted into the osteotomy site and the plate position was medial...
October 12, 2017: Knee
https://www.readbyqxmd.com/read/29028449/geometric-characteristics-of-the-knee-are-associated-with-a-noncontact-acl-injury-to-the-contralateral-knee-after-unilateral-acl-injury-in-young-female-athletes
#4
James G Levins, Erin C Argentieri, Daniel R Sturnick, Mack Gardner-Morse, Pamela M Vacek, Timothy W Tourville, Robert J Johnson, James R Slauterbeck, Bruce D Beynnon
BACKGROUND: Contralateral anterior cruciate ligament (CACL) injury after recovery from a first-time ACL rupture occurs at a high rate in young females; however, little is known about the risk factors associated with bilateral ACL trauma. HYPOTHESIS: The geometric characteristics of the contralateral knee at the time of the initial ACL injury are associated with risk of suffering a CACL injury in these female athletes. STUDY DESIGN: Case-control study; Level of evidence, 3...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29028358/posterior-tibial-translation-measurements-on-magnetic-resonance-imaging-improve-diagnostic-sensitivity-for-chronic-posterior-cruciate-ligament-injuries-and-graft-tears
#5
Nicholas N DePhillipo, Mark E Cinque, Jonathan A Godin, Gilbert Moatshe, Jorge Chahla, Robert F LaPrade
BACKGROUND: Magnetic resonance imaging (MRI) of the knee is a highly sensitive and specific method for diagnosing acute posterior cruciate ligament (PCL) tears, with a reported accuracy of 96% to 100%. In chronic and revision settings, these injuries may be missed on MRI because of the apparent continuity of nonfunctional PCL fibers. Posterior tibial translation (PTT) of the medial compartment has been identified as a potential secondary finding of PCL tear on routine MRI. Purpose/Hypothesis: The purpose of this study was to evaluate the sensitivity of PTT on MRI associated with PCL injuries and compare it with the sensitivity of a radiologist's MRI interpretation with preoperative posterior knee stress radiographs as the gold standard...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29025602/complex-tibial-plateau-fractures-a-retrospective-study-and-proposal-of-treatment-algorithm
#6
Amerigo Menghi, Giuseppe Mazzitelli, Emanuele Marzetti, Francesco Barberio, Emanuela D'Angelo, Giulio Maccauro
INTRODUCTION: Complex tibial plateau fractures are characterized by compression and sinking of one or both the articular surfaces. In this study, we evaluated clinical and radiological outcomes in patients with 41.C1,41.C2,41.C3 fractures according to AO classification. We also provide a specific therapeutic algorithm for each type of fracture. MATERIAL AND METHODS: The study was conducted in 43 patients who underwent surgical treatment for complex tibial plateau fractures and were followed for a minimum of 12 months...
October 2017: Injury
https://www.readbyqxmd.com/read/29018143/knee-upside-down
#7
Steven G J van der Aart, Remko J A Sonnega, Dirk-Jan Hofstee
We present a case of a 19-year-old woman with a forced hyperextension trauma of the knee causing a posteromedial fracture, a medial meniscus root tear and rupture of the posterior cruciate ligament. The posteromedial fracture of the tibial plateau was treated operatively with open reduction and internal fixation. Anatomical reconstruction was achieved. Postoperative treatment included unlimited flexion and minimal weight bearing. After 3 months, the patient had minimal pain after weight bearing and returned to preoperative range of motion...
October 9, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29017801/influence-of-increased-posterior-tibial-slope-in-total-knee-arthroplasty-on-knee-joint-biomechanics-a-computational-simulation-study
#8
Kyoung-Tak Kang, Yong-Gon Koh, Juhyun Son, Oh-Ryong Kwon, Jun-Sang Lee, Sae-Kwang Kwon
BACKGROUND: The reconstructed posterior tibial slope (PTS) plays a significant role in restoring knee kinematics in cruciate-retaining-total knee arthroplasty (TKA). A few studies have reported the effect of the PTS on biomechanics. METHODS: This study investigates the effect of the PTS on tibiofemoral (TF) kinematics, patellofemoral (PF) contact stress, and forces at the quadriceps, posterior cruciate ligament (PCL) and collateral ligament after cruciate-retaining-TKA using computer simulations...
September 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29016430/an-anatomic-and-radiographic-study-of-the-distal-tibial-epiphysis
#9
Cynthia V Nguyen, Janelle D Greene, Daniel R Cooperman, Raymond W Liu
BACKGROUND: Although the undulating shape of the distal tibial epiphysis is well recognized, its anatomic features have not been well quantified in the literature. To guide the placement of surgical implants about the distal tibial physis, we investigated the topographical anatomy of the distal tibial epiphysis and explored the ability of standard radiographs to visualize the physis. METHODS: We studied 30 cadaveric distal tibial epiphyses in specimens 3 to 14 years of age...
October 9, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28989265/technical-considerations-in-revision-anterior-cruciate-ligament-acl-reconstruction-for-operative-techniques-in-orthopaedics
#10
Jeremy M Burnham, Elmar Herbst, Thierry Pauyo, Thomas Pfeiffer, Darren L Johnson, Freddie H Fu, Volker Musahl
As the incidence of anterior cruciate ligament (ACL) reconstruction continues to increase, the rate of revision surgery continues to climb. Revision surgery has inherent challenges that must be addressed in order to achieve successful results. The cause of the primary ACL reconstruction failure should be determined, and careful preoperative planning should be performed to address the cause(s) of failure. Each patient undergoing revision surgery should undergo a thorough history and physical examination, receive full length alignment radiographs, lateral radiographs, 45-degree flexion weight-bearing postero-anterior radiographs, and patellofemoral radiographs...
March 2017: Operative Techniques in Orthopaedics
https://www.readbyqxmd.com/read/28989151/-application-of-pie-crusting-the-medial-collateral-ligament-release-in-arthroscopic-surgery-for-posterior-horn-of-%C3%A2-medial-meniscus-in-knee-joint
#11
Weihong Zhu, Qi Tang, Lele Liao, Ding Li, Yang Yang, You Chen
To explore the effectiveness and safety of pie-crusting the medial collateral ligament release (MCL) in treating posterior horn of medial meniscus (PHMM) tear in tight medial tibiofemoral compartment of knee joint.
 Methods: Thirty-two consecutive patients with PHMM tear in tight medial tibiofemoral compartment of knee joint were admitted to our department from January, 2013 to December, 2014. All patients were performed pie-crusting the MCL release at its tibial insertion with 18-gauge intravenous needle...
September 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28987067/reconstruction-of-severe-atherosclerotic-and-obstructive-diabetic-feet-using-thoracodorsal-artery-perforator-flaps-with-long-vascular-pedicles
#12
Sang Wha Kim, Il Hoon Sung, Youn Hwan Kim
BACKGROUND: Foot ulcers in diabetic patients often require free flaps. A long vascular pedicle is mandatory so that more proximal vessels can be used as recipient vessels, especially when the flap is used to reconstruct distal foot defects. We evaluated the outcome of diabetic foot defect that were reconstructed using thoracodorsal artery perforator (TDAP) flaps with long vascular pedicles. PATIENTS AND METHODS: We reconstructed the foot defects of 22 diabetic patients...
October 7, 2017: Microsurgery
https://www.readbyqxmd.com/read/28979585/posterior-tibial-tendon-dysfunction-an-overview
#13
Samuel Ka-Kin Ling, Tun Hing Lui
BACKGROUND: Adult acquired flatfoot deformity is a commonly seen condition with a large clinical spectrum. It ranges from asymptomatic subjects to severely disabled arthritic patients. Posterior tibialis tendon dysfunction is a common cause of adult acquired flatfoot deformity. METHODS: This article systematically reviews the published literature from books and journals that were either originally written or later translated into the English language regarding the subject of posterior tibialis tendon dysfunction...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28974461/bone-replaces-articular-cartilage-in-the-rat-knee-joint-after-prolonged-immobilization
#14
T M Campbell, K Reilly, O Laneuville, H Uhthoff, G Trudel
BACKGROUND: Lost joint range of motion (ROM) is common in chronic osteoarthritis, alters regional weight-bearing across the articular surfaces, and contributes to loss of cartilage and bone alterations. Limited data exist on the regional effects on joints subjected to chronic losses of ROM. OBJECTIVE: To characterize the regional replacement by bone as part of articular cartilage degeneration after prolonged immobilization. METHODS: Eleven rat knees were rigidly-immobilized in flexion for 32weeks with contralateral and sham-operated (n=6) knees as controls...
September 30, 2017: Bone
https://www.readbyqxmd.com/read/28971043/anatomical-localization-of-motor-points-of-the-abductor-hallucis-muscle-a-cadaveric-study
#15
Asayeon Choi, Na Yeon Kwon, Kyeongwon Kim, Youngkook Kim, Jeehae Oh, Hyun Mi Oh, Joo Hyun Park
OBJECTIVE: To identify the anatomical motor points of the abductor hallucis muscle in cadavers. METHODS: Motor nerve branches to the abductor hallucis muscles were examined in eight Korean cadaver feet. The motor point was defined as the site where the intramuscular nerve penetrates the muscle belly. The reference line connects the metatarsal base of the hallux (H) to the medial tubercle of the calcaneus (C). The x coordinate was the horizontal distance from the motor point to the point where the perpendicular line from the navicular tuberosity crossed the reference line...
August 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28970987/all-arthroscopic-suture-fixation-of-patellar-osteochondritis-dissecans
#16
Johannes Barth, Paul Brossard, Achilleas Boutsiadis, Nicolas Tardy, Jean-Claude Panisset, Romain Seil
Osteochondritis dissecans of the knee, despite its cause, is characterized by the impairment of the subchondral bone. Failure of its spontaneous healing makes surgical fixation often necessary. The patella is less affected than other locations in the knee. Its surgical treatment remains a challenge due to the thickness of the lesion and the complex approach of the retropatellar cartilage. Arthroscopy has the theoretical advantage to avoid a possible arthrotomy; however, the retrograde application of fixation materials does not guarantee good fragment compression and may lead to cartilage penetration and damage...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28970981/adjustable-button-devices-for-all-arthroscopic-posterior-cruciate-ligament-reconstruction-using-the%C3%A2-hamstrings-tendons-and-the-forgotten-transseptal-approach
#17
Paul Brossard, Achilleas Boutsiadis, Jean-Claude Panisset, Frédéric Mauris, Johannes Barth
Posterior cruciate ligament (PCL) ruptures account for nearly 20% of all ligamentous knee injuries. These may be either isolated or in the setting of a more complex knee trauma. Isolated tears with moderate posterior laxity (grades I or II) are commonly treated conservatively; nevertheless, symptomatic grade III injuries frequently require surgical intervention. PCL reconstruction remains a challenging surgery for multiple reasons like the neurovascular structures' proximity, the difficult passage of the graft with the "killer turn" angle, or the risk of poor graft fixation...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28970980/posterior-cruciate-ligament-reconstruction-with-retrograde-femoral-technique-posterior-trans-septal-portal-and-full-tibial-tunnel
#18
Man Soo Kim, In Jun Koh, Young Jun Choi, Yong In
Suspensory femoral graft fixation has been a popular and reliable method in anterior cruciate ligament (ACL) reconstruction. Some authors have introduced suspensory femoral fixation in posterior cruciate ligament (PCL) reconstruction using inside-out (IO) technique. The use of IO technique for femoral tunnel preparation could significantly sharpen the critical corner, which might result in graft failure. A retrograde drilling pin that recently has been popular in ACL reconstruction allows "no incision" in the outside-in (OI) technique for the creation of a femoral socket...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28970127/relationships-of-hamstring-muscle-volumes-to-lateral-tibial-slope
#19
Randy J Schmitz, Anthony S Kulas, Sandra J Shultz, Justin P Waxman, Hsin-Min Wang, Robert A Kraft
BACKGROUND: Greater posterior-inferior directed slope of the lateral tibial plateau (LTS) has been demonstrated to be a prospective ACL injury risk factor. Trainable measures to overcome a greater LTS need to be identified for optimizing injury prevention protocols. It was hypothesized that Healthy individuals with greater LTS who have not sustained an ACL injury would have a larger lateral hamstring volume. METHODS: Eleven healthy females (mean +/- standard deviation) (1...
September 29, 2017: Knee
https://www.readbyqxmd.com/read/28966378/patella-height-changes-post-high-tibial-osteotomy
#20
Siew Ghim Gooi, Chloe Xiao Yun Chan, Melvin Kian Loong Tan, Andrew Kean Seng Lim, Kandiah Satkunanantham, James Hoi Po Hui
BACKGROUND: Medial opening wedge high tibial osteotomy (HTO) is a well-described treatment in early medial compartmental osteoarthritis of the knee. However, two undesirable sequelae may follow -patella baja and changes in the posterior tibial slope (TS). MATERIALS AND METHODS: We conducted a retrospective study in patients who underwent HTO in our center between September 2009 and February 2017. Preoperative and 6-week postoperative long-leg weight bearing films and lateral knee radiographs were assessed...
September 2017: Indian Journal of Orthopaedics
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