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posterior cruciate reconstruction

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https://www.readbyqxmd.com/read/28090441/principal-component-analysis-t1%C3%AF-voxel-based-relaxometry-of-the-articular-cartilage-a-comparison-of-biochemical-patterns-in-osteoarthritis-and-anterior-cruciate-ligament-subjects
#1
Valentina Pedoia, Colin Russell, Allison Randolph, Xiaojuan Li, Sharmila Majumdar
BACKGROUND: Quantitative MR, including T1ρ mapping, has been extensively used to probe early biochemical changes in knee articular cartilage of subjects with osteoarthritis (OA) and others at risk for cartilage degeneration, such as those with anterior cruciate ligament (ACL) injury and reconstruction. However, limited studies have been performed aimed to assess the spatial location and patterns of T1ρ. In this study we used a novel voxel-based relaxometry (VBR) technique coupled with principal component analysis (PCA) to extract relevant features so as to describe regional patterns and to investigate their similarities and differences in T1ρ maps in subjects with OA and subjects six months after ACL reconstruction (ACLR)...
December 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28089795/comparison-of-postoperative-biomechanical-function-between-anatomic-double-bundle-and-single-bundle-acl-reconstructions-using-calcium-phosphate-hybridized-tendon-grafts-in-goats
#2
Hirotaka Mutsuzaki, Hiromichi Fujie, Hiromi Nakajima, Makoto Fukagawa, Shunsuke Nomura, Masataka Sakane
BACKGROUND: Calcium phosphate (CaP)-hybridized tendon grafts improved biomechanical function compared with untreated grafts after single-bundle (SB) anterior cruciate ligament (ACL) reconstruction.The purpose of this study was to compare the biomechanical functionbetweenanatomic double-bundle (DB)and single-bundle (SB)ACL reconstructions using CaP-hybridized tendon grafts at 6 months postoperativelyin goats. HYPOTHESIS: We hypothesized that the postoperativebiomechanicalfunctioninthe DBgroupwill bebetterthan that inthe SB group...
January 9, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28060534/is-it-necessary-to-repair-stable-ramp-lesions-of-the-medial-meniscus-during-anterior-cruciate-ligament-reconstruction
#3
Xin Liu, Hui Zhang, Hua Feng, Lei Hong, Xue-Song Wang, Guan-Yang Song
BACKGROUND: A special type of meniscal lesion involving the peripheral attachment of the posterior horn of the medial meniscus (PHMM), termed a "ramp lesion," is commonly associated with an anterior cruciate ligament (ACL) injury. However, its treatment is still controversial. Recently, stable ramp lesions treated with abrasion and trephination alone have been shown to have good clinical outcomes after ACL reconstruction. HYPOTHESIS: Stable ramp lesions treated with abrasion and trephination alone during ACL reconstruction will result in similar clinical outcomes compared with those treated with surgical repair...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28045871/revision-posterior-cruciate-ligament-surgery
#4
Gregory C Fanelli, Matthew G Fanelli, David G Fanelli
Successful posterior cruciate ligament (PCL) reconstruction surgery results from identification and treatment of associated pathology such as posterolateral instability, posteromedial instability, and lower extremity malalignment. The use of strong graft material, properly placed tunnels to as closely as possible approximate the PCL insertion sites, and minimization of graft bending also enhance the probability of PCL reconstruction success. In addition, mechanical graft tensioning, primary and back-up PCL graft fixation, and the appropriate postoperative rehabilitation program are also necessary ingredients for PCL reconstruction success...
March 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28038341/standing-balance-and-inter-limb-balance-asymmetry-at-one-year-post-primary-anterior-cruciate-ligament-reconstruction-sex-differences-in-a-cohort-study-of-414-patients
#5
Ross A Clark, Stuart W Bell, Julian A Feller, Timothy S Whitehead, Kate E Webster
BACKGROUND: Static standing balance can be safely assessed early following anterior cruciate ligament reconstruction (ACLR), and deficits may have important implications for long-term outcomes. This study includes a large cohort of people post-ACLR and has the primary aim of establishing whether inter-limb and sex differences exist, with a secondary aim of assessing the association between static balance variables and other outcome measures. METHODS: A total of 414 patients with a primary ACLR performed a 30-s static single leg balance test...
December 16, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28032708/what-role-does-low-bone-mineral-density-play-in-the-killer-turn-effect-after-transtibial-posterior-cruciate-ligament-reconstruction
#6
Yue Li, Xing-Zuo Chen, Jin Zhang, Guan-Yang Song, Xu Li, Hua Feng
OBJECTIVE: To explore the mechanism of the "killer turn", which is reported to be a reason for postoperative residual laxity after transtibial posterior cruciate ligament (PCL) reconstruction, in a low bone mineral density (BMD) condition. METHODS: A total of 80 skeletally mature female New Zealand white rabbits were included for biomechanical evaluation after transtibial PCL reconstructions. The subjects were equally divided into low BMD (n = 40) and control groups (n = 40)...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28031491/correlation-of-femoral-tunnel-length-with-body-height-limb-length-and-thigh-length-in-indian-patients-undergoing-anterior-cruciate-ligament-reconstruction
#7
Ravi Gupta, Anubhav Malhotra, Pawan Kumar, Gladson David Masih
PURPOSE: To measure the femoral tunnel length created through a far medial portal and determine its correlation with body height, limb length, and thigh length in 404 Indian patients undergoing anterior cruciate ligament (ACL) reconstruction. METHODS: 364 male and 40 female Indian patients aged 18 to 51 (mean, 26.8) years underwent ACL reconstruction by a single surgeon using the hamstrings tendon autograft. Their body height, limb length, and thigh length were measured by a single assessor, as was the femoral tunnel length...
December 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28028568/arthroscopic-all-inside-ramp-lesion-repair-using-the-posterolateral-transseptal-portal-view
#8
Sohrab Keyhani, Jin Hwan Ahn, René Verdonk, Mehran Soleymanha, Mohammadreza Abbasian
PURPOSE: The purpose of this study was to evaluate and describe the clinical results and outcomes of a novel method for all-inside suture repair of medial meniscus ramp lesions through posteromedial and posterolateral transseptal portals during anterior cruciate ligament (ACL) reconstruction. Further, this investigation compared the posterolateral view to the notch view for diagnosis and repair. METHODS: Between 2011 and 2014, 166 patients had ramp lesions concomitantly with ACL injury; 128 patients (107 men and 21 women) were enrolled in the study after qualification...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28027463/quantifying-knee-mechanics-during-balance-training-exercises
#9
Lauren C Benson, Thomas G Almonroeder, Kristian M O'Connor
Patellofemoral pain (PFP) is common among runners and those recovering from anterior cruciate ligament reconstruction. Training programs designed to prevent or treat injuries often include balance training, although balance interventions have been reported to coincide with more knee injuries. Knowledge of the effect of balance exercises on knee mechanics may be useful when designing training programs. High knee abduction moment has been implicated in the development of PFP, and imbalance between vastus lateralis (VL) and vastus medialis oblique (VMO) may contribute to patellofemoral stress...
December 24, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27992239/differential-effects-of-two-rehabilitation-programs-following-anterior-cruciate-ligament-reconstruction
#10
Igor Setuain, Mikel Izquierdo, Fernando Idoate, Eder Bikandi, Esteban M Gorostiaga, Per Aagaard, Eduardo L Cadore, Jesús Alfaro-Adrián
Context- The muscular function restoration related to the type of physical rehabilitation followed after anterior cruciate ligament reconstruction (ACLR) using autologous hamstring tendon graft in terms of strength and cross sectional area (CSA) remain controversial. Objective- To analyze the CSA and force output of quadriceps and hamstring muscles in subjects following either an Objective Criteria-Based rehabilitation (OCBR) algorithm or the usual care (UCR) for ACL rehabilitation in Spain, before and one year after undergoing an ACLR...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27957713/drill-wobble-effect-on-femoral-tunnel-aperture-during-anterior-cruciate-ligament-reconstruction
#11
Naser Alnusif, Adam Hart, Maher Baroudi, Robert Marien, Mark Burman, Paul A Martineau
BACKGROUND: In anterior cruciate ligament reconstruction performed using cortical button fixation on the femur, we have observed a "wobble" effect that can occur when a cannulated femoral drill is used over a guide pin that is not securely fixed in bone. Our study assessed the effect of drill "wobble" on femoral tunnel aperture in sawbones. METHODS: Femoral tunnels were drilled in sawbones, which had been divided in two groups of 10 each, per drilling technique...
December 2016: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/27928547/relationship-of-acl-injury-and-posterior-tibial-slope-with-patient-age-sex-and-race
#12
Alana Waiwaiole, Ajay Gurbani, Kambiz Motamedi, Leanne Seeger, Myung Shin Sim, Patricia Nwajuaku, Sharon L Hame
BACKGROUND: Posterior tibial slope (PTS) has been proposed as a potential risk factor for anterior cruciate ligament (ACL) injury; however, studies that have examined this relationship have provided inconclusive and sometimes contradictory results. Further characterization of this relationship may enable the medical community to identify individuals at greater risk for ACL injury and possibly characterize an anatomic target during surgical reconstruction. PURPOSE: The primary goal was to investigate the relationship between PTS and ACL injury...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27909681/double-bundle-all-inside-posterior-cruciate-ligament-reconstruction-a-technique-using-2%C3%A2-separate-autologous-grafts
#13
Roy A G Hoogeslag, Bart W Oudelaar, Rianne Huis In't Veld, Reinoud W Brouwer
In a double-bundle posterior cruciate ligament reconstruction, several surgical techniques are available. Compared with other techniques, the advantages of the all-inside technique and cortical suspension devices with variable loop length are that shorter grafts can be used, tendons can be quadrupled, and a double-bundle posterior cruciate ligament reconstruction can be performed with autologous grafts. Furthermore, the all-inside technique provides independent outside-in socket reaming and is soft tissue, cortex, and bone sparing because no full diameter tunnels but sockets are created with a small diameter guide pin, which can transform into a retrograde drill...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27904222/functional-and-computed-tomography-correlation-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-use-of-accessory-anteromedial-portal
#14
Naveen Joseph Mathai, Rajkumar S Amaravathi, K V Pavan, Padmanabhan Sekaran, Gaurav Sharma, Belliappa Codanda
BACKGROUND: An accessory anteromedial portal (AAMP) has been shown to be effective in placing an anatomically ideal femoral tunnel. It is well known that this is due to the independent femoral drilling which is possible with the AAMP. However very little is known regarding the significance of this reconstruction technique in influencing the functional outcomes of anatomic anterior cruciate ligament reconstruction (ACLR). This study documents the influence of tibial and femoral tunnel positions on functional outcomes of anatomic ACLR using the AAMP...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27899355/the-anatomic-centers-of-the-femoral-and-tibial-insertions-of-the-anterior-cruciate-ligament-a-systematic-review-of-imaging-and-cadaveric-studies-reporting-normal-center-locations
#15
Anagha P Parkar, Miraude E A P M Adriaensen, Søren Vindfeld, Eirik Solheim
BACKGROUND: The anterior cruciate ligament (ACL) is regularly reconstructed if knee joint function is impaired. Anatomic graft tunnel placement, often assessed with varying measurement methods, in the femur and tibia is considered important for an optimal clinical outcome. A consensus on the exact location of the femoral and tibial footprint centers is lacking. PURPOSE: To systematically review the literature regarding anatomic centers of the femoral and tibial ACL footprints and assess the mean, median, and percentiles of normal centers...
November 29, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27896678/no-clinically-important-difference-in-knee-scores-or-instability-between-transtibial-and-inlay-techniques-for-pcl-reconstruction-a-systematic-review
#16
REVIEW
Young-Soo Shin, Hyun-Jung Kim, Dae-Hee Lee
BACKGROUND: It is unclear whether the biomechanical superiority of the inlay technique over the transtibial technique, arising from avoidance of the killer turn at the graft-tunnel margin of the proximal tibia during posterior cruciate ligament (PCL) reconstruction, leads to better knee scores or greater knee stability. QUESTIONS/PURPOSES: This systematic review was designed to compare Tegner and Lysholm scores, and posterior residual laxity of the knee, between single-bundle PCL reconstruction using transtibial and inlay techniques...
November 28, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27881382/early-changes-in-knee-center-of-rotation-during-walking-after-anterior-cruciate-ligament-reconstruction-correlate-with-later-changes-in-patient-reported-outcomes
#17
Matthew R Titchenal, Constance R Chu, Jennifer C Erhart-Hledik, Thomas P Andriacchi
BACKGROUND: Altered knee kinematics after anterior cruciate ligament injury and reconstruction (ACLR) have been implicated in the development of posttraumatic osteoarthritis (PTOA), leading to poor long-term clinical outcomes. PURPOSE: This study was conducted to determine (1) whether the average knee center of rotation (KCOR), a multidimensional metric of knee kinematics, of the ACL-reconstructed knee during walking differs from that of the uninjured contralateral knee; (2) whether KCOR changes between 2 and 4 years after surgery; and (3) whether early KCOR changes predict patient-reported outcomes 8 years after ACLR...
November 23, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27880849/loading-patterns-of-the-posterior-cruciate-ligament-in-the-healthy-knee-a-systematic-review
#18
S H Hosseini Nasab, Renate List, Katja Oberhofer, Sandro F Fucentese, Jess G Snedeker, William R Taylor
BACKGROUND: The posterior cruciate ligament (PCL) is the strongest ligament of the knee, serving as one of the major passive stabilizers of the tibio-femoral joint. However, despite a number of experimental and modelling approaches to understand the kinematics and kinetics of the ligament, the normal loading conditions of the PCL and its functional bundles are still controversially discussed. OBJECTIVES: This study aimed to generate science-based evidence for understanding the functional loading of the PCL, including the anterolateral and posteromedial bundles, in the healthy knee joint through systematic review and statistical analysis of the literature...
2016: PloS One
https://www.readbyqxmd.com/read/27872126/multiple-ligament-reconstruction-femoral-tunnels-intertunnel-relationships-and-guidelines-to-avoid-convergence
#19
Gilbert Moatshe, Alex W Brady, Erik L Slette, Jorge Chahla, Travis Lee Turnbull, Lars Engebretsen, Robert F LaPrade
BACKGROUND: Knee dislocations often require multiple concurrent ligament reconstructions, which involve creating several tunnels in the distal femur. Therefore, the risk of tunnel convergence is increased because of the limited bone volume within the distal aspect of the femur. PURPOSE: To assess the risk of tunnel convergence and determine the optimal reconstruction tunnel orientations for multiple ligament reconstructions in the femur. STUDY DESIGN: Descriptive laboratory study...
November 21, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27868076/synovial-c-shaped-tibial-footprint-of-the-anterior-cruciate-ligament
#20
César Janovsky, Camila Cohen Kaleka, Maria Teresa Seixas Alves, Mario Ferretti, Moises Cohen
BACKGROUND: Although numerous anatomic studies about the anterior cruciate ligament (ACL) structure and attachments have been performed, these studies have not reached consensus on the ACL footprint. PURPOSE: To investigate the existing controversy regarding the morphology of the tibial ACL insertion (footprint) and confirm histologically that the tibial ACL footprint is not completely filled with ligament tissue. STUDY DESIGN: Descriptive laboratory study...
November 2016: Orthopaedic Journal of Sports Medicine
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