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Posterior Cruciate

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https://www.readbyqxmd.com/read/29330345/a-computational-simulation-study-to-determine-the-biomechanical-influence-of-posterior-condylar-offset-and-tibial-slope-in-cruciate-retaining-total-knee-arthroplasty
#1
K-T Kang, Y-G Koh, J Son, O-R Kwon, J-S Lee, S K Kwon
OBJECTIVES: Posterior condylar offset (PCO) and posterior tibial slope (PTS) are critical factors in total knee arthroplasty (TKA). A computational simulation was performed to evaluate the biomechanical effect of PCO and PTS on cruciate retaining TKA. METHODS: We generated a subject-specific computational model followed by the development of ± 1 mm, ± 2 mm and ± 3 mm PCO models in the posterior direction, and -3°, 0°, 3° and 6° PTS models with each of the PCO models...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29329888/associations-between-cartilage-proteoglycan-density-and-patient-outcomes-12months-following-anterior-cruciate-ligament-reconstruction
#2
Brian Pietrosimone, Daniel Nissman, Darin A Padua, J Troy Blackburn, Matthew S Harkey, Robert A Creighton, Ganesh M Kamath, Kaitlin Healy, Randy Schmitz, Jeffrey B Driban, Steve W Marshall, Joanne M Jordan, Jeffrey T Spang
BACKGROUND: Lower proteoglycan density (PGD) of the articular cartilage may be an early marker of osteoarthritis following anterior cruciate ligament (ACL) reconstruction (ACL-R). The purpose this study was to determine associations between the Knee Injury and Osteoarthritis Outcomes Score (KOOS) and PGD of the articular cartilage in the femur and tibia 12-months following ACL-R. METHODS: We evaluated KOOS pain, symptoms, function in activities of daily living (ADL), function in sport and recreation (Sport), and quality of life (QOL), as well as PGD using T1rho magnetic resonance imaging in 18 individuals 12...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29328888/posterior-cruciate-ligament-reconstruction-with-transtibial-or-tibial-inlay-techniques-a-meta-analysis-of-biomechanical-and-clinical-outcomes
#3
Dong-Yeong Lee, Dong-Hee Kim, Hyun-Jung Kim, Hyeong-Sik Ahn, Tae-Ho Lee, Sun-Chul Hwang
BACKGROUND: Transtibial (TT) or tibial inlay (TI) techniques are commonly used for posterior cruciate ligament reconstruction (PCLR). However, the optimum method for PCLR after PCL injury remains debatable. Hypothesis/Purpose: The hypothesis was that TT and TI techniques would not show significant differences for all outcome measures. The purpose was to determine the biomechanical and clinical outcomes of TT and TI surgical techniques for PCLR. STUDY DESIGN: Meta-analysis; Level of evidence, 3...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29322332/evaluation-of-age-dependent-morphometrics-of-the-meniscofemoral-ligaments-in-reference-to-the-posterior-cruciate-ligament-in-routine-mri
#4
Sebastian Röhrich, Franz Kainberger, Lena Hirtler
OBJECTIVES: To quantify the morphological correlation between the posterior cruciate ligament (PCL) and the meniscofemoral ligaments (MFLs), to propose normal ranges for different age populations, and to define guidelines for correct identification and differentiation of MFLs in routine MRI. METHODS: Three hundred forty-two subjects were included retrospectively and subdivided into five age groups. Morphometrics of the PCL and the MFLs were measured on standard MRI in the sagittal, coronal, and axial planes...
January 10, 2018: European Radiology
https://www.readbyqxmd.com/read/29320786/imaging-of-ligamentous-structures-within-the-knee-includes-much-more-than-the-acl
#5
Kara Gaetke-Udager, Corrie M Yablon
Ligamentous structures of the knee are numerous and complex, including the anterior and posterior cruciate ligaments, medial and lateral collateral ligaments, ligaments of the posteromedial and posterolateral corners, and the anterolateral ligament. Clinical assessment after a knee injury is paramount and can direct both the clinician's choice of imaging study and the radiologist's interpretation. Imaging is crucial in that it provides additional information for diagnosis, management, and surgical planning...
January 10, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29312850/anterolateral-rotatory-instability-in-vivo-correlates-tunnel-position-after-anterior-cruciate-ligament-reconstruction-using-bone-patellar-tendon-bone-graft
#6
Yasutaka Tashiro, Ken Okazaki, Koji Murakami, Hirokazu Matsubara, Kanji Osaki, Yukihide Iwamoto, Yasuharu Nakashima
AIM: To quantitatively assess rotatory and anterior-posterior instability in vivo after anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BTB) autografts, and to clarify the influence of tunnel positions on the knee stability. METHODS: Single-bundle ACL reconstruction with BTB autograft was performed on 50 patients with a mean age of 28 years using the trans-tibial (TT) (n = 20) and trans-portal (TP) (n = 30) techniques. Femoral and tibial tunnel positions were identified from the high-resolution 3D-CT bone models two weeks after surgery...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29302780/effects-of-posterior-condylar-osteophytes-on-gap-balancing-in-computer-assisted-total-knee-arthroplasty-with-posterior-cruciate-ligament-sacrifice
#7
Pornpavit Sriphirom, Chaiyaporn Siramanakul, Boonyawat Chanopas, Sirisuk Boonruksa
OBJECTIVE: Gap planning in navigated total knee arthroplasty (TKA) is a critical concern. Osteophytes are normally removed prior to gap planning, with the exception of posterior condylar osteophytes of the femur, which are removed after posterior condylar resection. This study investigated how posterior condylar osteophytes affect gap balancing during surgery. METHODS: This prospective study was conducted on 40 primary varus osteoarthritic knees with a posterior condylar osteophyte that underwent TKA navigation...
January 4, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29299497/comparison-of-clinical-outcomes-between-different-femoral-tunnel-positions-after-anterior-cruciate-ligament-reconstruction-surgery
#8
Seyed M Kazemi, Mohammad R Abbasian, Ali A Esmailijah, Ali Zafari, Zahra Salehi Shahrbabaki, Amir H Keshavarz, Nina Esmaeilijah, Farshad Safdari
Background: It has been shown that the proper placement of ACL graft during the ACL reconstruction surgery significantly improves the clinical outcomes. This study investigated whether a change in the femoral tunnel position in both axial and coronal planes can significantly alter the postoperative functional and clinical outcomes of the patients. Methods: This comparative, retrospective, single-center study was performed on 44 patients undergone single-bundle anterior cruciate ligament reconstruction (ACLR)...
November 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29298161/the-evolving-treatment-patterns-of-ncaa-division-i-football-players-by-orthopaedic-team-physicians-over-the-past-decade-2008-2016
#9
Trevor J Carver, John B Schrock, Matthew J Kraeutler, Eric C McCarty
BACKGROUND: Previous studies have analyzed the treatment patterns used to manage injuries in National Collegiate Athletic Association (NCAA) Division I football players. HYPOTHESIS: Treatment patterns used to manage injuries in NCAA Division I football players will have changed over the study period. STUDY DESIGN: Descriptive epidemiology study. LEVEL OF EVIDENCE: Level 5. METHODS: The head orthopaedic team physicians for all 128 NCAA Division I football teams were asked to complete a survey containing questions regarding experience as team physician, medical coverage of the team, reimbursement issues, and treatment preferences for some of the most common injuries occurring in football players...
January 1, 2018: Sports Health
https://www.readbyqxmd.com/read/29279562/midterm-result-of-arthroscopic-bicruciate-ligament-sutures-for-multiligament-knee-injury-in-an-adolescent-patient
#10
Yasushi Oshima, Norishige Iizawa, Shinro Takai
BACKGROUND: Treatment of multiligament knee injuries, especially in adolescent patients, is challenging for orthopedic surgeons. Repair of collateral ligaments and reconstruction of cruciate ligaments are usually performed, however, ligament reconstruction with transphyseal or physeal-sparing techniques may lead to physeal damage and growth disturbances in skeletally immature patients. We present a case report on performing bicruciate ligament sutures arthroscopically in an adolescent patient...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/29276123/prospective-randomized-comparison-of-posterior-stabilized-versus-condylar-stabilized-total-knee-arthroplasty-final-report-of-a-five-year-study
#11
David F Scott
BACKGROUND: This report presents the minimum 5-year results of a prospective, randomized, Level of Evidence I study that evaluated cruciate-sacrificing total knee arthroplasty using either a posterior-stabilized (PS) device or a condylar-stabilized (CS) device. We hypothesized that the clinical outcomes of both groups would be equivalent and that there would be differences in operative time and/or blood loss parameters. METHODS: One-hundred eleven patients undergoing total knee arthroplasty were randomized to receive either a post-cam style tibial insert (PS, n = 56) or a more congruent anterior-lipped tibial insert (CS, n = 55)...
December 7, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29273291/balanced-flexion-and-extension-gaps-are-not-always-of-equal-size
#12
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
https://www.readbyqxmd.com/read/29249200/anatomical-variant-of-the-meniscus-related-to-posterior-junction-a-case-report
#13
David Sadigursky, Lucas Cortizo Garcia, Rodrigo Rêgo Martins, Gustavo Castro De Queiroz, Rogério Jamil Fernandes Carneiro, Paulo Oliveira Colavolpe
BACKGROUND: There are several reports on anatomical differences of the meniscus. However, there are only a few reports on abnormalities in both menisci and anatomical differences in anterior cruciate ligament insertions. CASE PRESENTATION: This is a case report of a 36-year-old Hispanic man presenting symptoms, including knee pain, locking, and effusion, with an anatomical abnormality of the menisci corresponding to the fusion of the posterior horns of the menisci in tandem with the insertion of the posterior meniscus fibers in the anterior cruciate ligament...
December 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29244657/an-unusual-case-of-an-intra-articular-osseous-fragment-associated-with-a-medial-collateral-ligament-femoral-avulsion-fracture-in-an-adult-a-case-report
#14
Meagan M McCarthy, Dana C Covey
CASE: The medial collateral ligament (MCL) is the most commonly injured ligament of the knee; however, to our knowledge, avulsion fractures of the MCL resulting in an intra-articular fragment have not been reported. We present the case of a 55-year-old woman with a posterior cruciate ligament avulsion fracture and an MCL avulsion fracture with an intra-articular bony fragment. CONCLUSION: Patients who sustain trauma to the knee should be carefully evaluated for ligamentous avulsion injuries...
December 13, 2017: JBJS Case Connector
https://www.readbyqxmd.com/read/29244525/20-year-outcomes-of-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-autograft-the-catastrophic-effect-of-age-and-posterior-tibial-slope
#15
Lucy J Salmon, Emma Heath, Hawar Akrawi, Justin P Roe, James Linklater, Leo A Pinczewski
BACKGROUND: No well-controlled studies have compared the long-term outcome of anterior cruciate ligament (ACL) reconstruction with hamstring tendon autograft between adolescents and adults. Increased posterior tibial slopes (PTSs) have been reported in the ACL-injured versus controls, but the effect of PTS on the outcome after reconstruction is relatively unexplored. PURPOSE: To compare the prospective longitudinal outcome of "isolated" ACL ruptures treated with anatomic endoscopic ACL reconstruction using hamstring tendon autograft over 20 years in adolescent and adult cohorts and to examine factors for repeat ACL injury...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29244223/fixed-bearing-medial-unicompartmental-knee-arthroplasty-restores-neither-the-medial-pivoting-behavior-nor-the-ligament-forces-of-the-intact-knee-in-passive-flexion
#16
Mohammad Kia, Lucian C Warth, Joseph D Lipman, Timothy M Wright, Geoffrey H Westrich, Michael B Cross, David J Mayman, Andrew D Pearle, Carl W Imhauser
Medial unicompartmental knee arthroplasty (UKA) is an accepted treatment for isolated medial osteoarthritis. However, using an improper thickness for the tibial component may contribute to early failure of the prosthesis or disease progression in the unreplaced lateral compartment. Little is known of the effect of insert thickness on both knee kinematics and ligament forces. Therefore, a computational model of the tibiofemoral joint was used to determine how non-conforming, fixed bearing medial UKA affects tibiofemoral kinematics and tension in the medial collateral ligament (MCL) and the anterior cruciate ligament (ACL) during passive knee flexion...
December 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29225016/posterior-cruciate-ligament-injuries-of-the-knee-at-the-national-football-league-combine-an-imaging-and-epidemiology-study
#17
Catherine A Logan, Brendin R Beaulieu-Jones, George Sanchez, Jorge Chahla, Nicholas I Kennedy, Mark E Cinque, Robert F LaPrade, James M Whalen, Bryan G Vopat, Mark D Price, Matthew T Provencher
PURPOSE: To determine the epidemiology by player position, examination, imaging findings, and associated injuries of posterior cruciate ligament (PCL) injuries in players participating in the National Football League (NFL) Combine. METHODS: All PCL injuries identified at the NFL Combine (2009-2015) were reviewed. Data were obtained from the database organized by the NFL medical personnel for the compilation of the medical and physical performance examination results of NFL Draftees participating in the NFL Combine from 2009 to 2015...
December 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29209793/degenerative-changes-after-posterior-cruciate-ligament-reconstruction-are-irrespective-of-posterior-knee-stability-mri-based-long-term-results
#18
Clemens Gwinner, Andreas Weiler, Timm Denecke, Julian M M Rogasch, Heide Boeth, Tobias M Jung
INTRODUCTION: Posterior cruciate ligament reconstruction (PCLR) is advocated to prevent an early onset of osteoarthritis. We hypothesized that posterior instability after PCLR correlates with degenerative changes. MATERIALS AND METHODS: MRIs of 42 (12 female/30 male; 39 ± 9 years) patients were enrolled with a minimum 5-year follow-up (FFU) after PCLR. In addition, 25 contralateral and 15 follow-up MRIs (12 months after baseline) were performed. Degenerative changes were graded using WORMS...
December 6, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29208323/evaluation-of-posterior-cruciate-ligament-and-intercondylar-notch-in-subjects-with-anterior-cruciate-ligament-tear-a-comparative-flexed-knee-3d-magnetic-resonance-imaging-study
#19
Atul K Taneja, Frederico C Miranda, Marco K Demange, Marcelo P Prado, Durval C B Santos, Laercio A Rosemberg, Ronaldo H Baroni
PURPOSE: To determine if posterior cruciate ligament (PCL) and intercondylar notch (IN) morphometries and volumetrics act as risk factors for anterior cruciate ligament (ACL) tears. METHODS: A prospective case-controlled magnetic resonance imaging (MRI) study was conducted with subjects presenting noncontact knee injuries. Exclusion criteria were previous surgery, PCL tear, osteoarthritis, tumors, or infectious and inflammatory conditions. All participants underwent a flexed-knee 3-dimensional (3D) magnetic resonance imaging (MRI) to uniformly straighten PCL...
December 2, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29201924/flexion-gap-in-the-isolated-posterior-cruciate-ligament-injured-knee-affects-symptom-relief-after-conservative-treatment-a-case-control-study
#20
Yasukazu Yonetani, Yoshio Matsui, Yoshinari Tanaka, Shuji Horibe
Background: The posterior cruciate ligament (PCL) is a primary stabilizer of the knee in the posterior direction. However, PCL deficiency presents a clinical paradox because the outcome of PCL deficiency ranges from total disability to uninterrupted participation in competitive athletics. Purpose: To investigate whether posterior laxity (PL) and the flexion gap (FG) influence the results of the conservative treatment of isolated PCL injuries. Study Design: Case-control study; Level of evidence, 3...
November 2017: Orthopaedic Journal of Sports Medicine
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