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Knee AP TECHNIQUE

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https://www.readbyqxmd.com/read/29223707/reliability-of-two-techniques-and-training-level-of-the-observer-in-measuring-the-correction-angle-when-planning-a-high-tibial-osteotomy
#1
Julia Blackburn, Aneel Ansari, Andrew Porteous, James Murray
BACKGROUND: In high tibial osteotomy, planning is critical for achieving successful realignment. Any method selected needs to be reliable, with inter-observer and intra-observer correlation. A literature review demonstrated two distinct methods of planning for high tibial osteotomy. HYPOTHESIS: Both methods are precise and show excellent inter and intra-observer correlation. METHOD: Fifty consecutive weight-bearing long leg alignment antero-posterior (AP) radiographs were identified and planning undertaken on suitable radiographs using the methods of Puddu (method 1) and Miniaci (method 2)...
December 6, 2017: Knee
https://www.readbyqxmd.com/read/29064870/biomechanical-evaluation-of-pediatric-anterior-cruciate-ligament-acl-reconstruction-techniques-with-and-without-the-anterolateral-ligament-all
#2
Natasha Trentacosta, James L Pace, Melodie Metzger, Max Michalski, Trevor Nelson, Landon Polakof, Bert Mandelbaum
BACKGROUND: Two popular physeal-sparing procedures used in the management of anterior cruciate ligament (ACL) injuries in skeletally immature patients are the iliotibial band (ITB) ACL reconstruction (ACLR) and the all-epiphyseal (AE) ACLR. Although there has been concern for overconstraint of the lateral compartment of the knee with the ITB ACLR technique, rotational stability, as provided by the anterolateral ligament (ALL) and ACL, has not been assessed in the setting of pediatric ACLR techniques...
October 23, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28927643/a-combined-kinematic-and-kinetic-analysis-at-the-residuum-socket-interface-of-a-knee-disarticulation-amputee
#3
Jinghua Tang, Michael McGrath, Nick Hale, Liudi Jiang, Dan Bader, Piotr Laszczak, David Moser, Saeed Zahedi
The bespoke interface between a lower limb residuum and a prosthetic socket is critical for an amputee's comfort and overall rehabilitation outcomes. Analysis of interface kinematics and kinetics is important to gain full understanding of the interface biomechanics, which could aid clinical socket fit, rehabilitation and amputee care. This pilot study aims to investigate the dynamic correlation between kinematic movement and kinetic stresses at the interface during walking tests on different terrains. One male, knee disarticulation amputee participated in the study...
November 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28741153/recovery-of-acl-function-after-dynamic-intraligamentary-stabilization-is-resultant-to-restoration-of-acl-integrity-and-scar-tissue-formation
#4
Atesch Ateschrang, Sufian S Ahmad, Ulrich Stöckle, Steffen Schroeter, Willem Schenk, Marc Daniel Ahrend
PURPOSE: Dynamic intraligamentary stabilization (DIS) is recognized as a ligament preserving technique for the treatment of acute anterior cruciate ligament (ACL) injuries. The aim of this study was to assess the integrity and morphology of the recovered ACL after DIS repair. METHODS: The cohort comprised 47 patients with an acute proximal ACL rupture undergoing DIS repair. All patients underwent diagnostic arthroscopy after a minimum postoperative interval of 6 months for semi-quantitative evaluation of ACL integrity, function and scar tissue formation...
July 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28636429/autograft-versus-allograft-for-posterior-cruciate-ligament-reconstruction-an-updated-systematic-review-and-meta-analysis
#5
John W Belk, Matthew J Kraeutler, Justin M Purcell, Eric C McCarty
BACKGROUND: Multiple studies have demonstrated a higher risk of graft failure after anterior cruciate ligament reconstruction with allograft, but limited data are available comparing outcomes of posterior cruciate ligament reconstruction (PCLR) with autograft versus allograft. PURPOSE: To compare the clinical outcomes of autograft versus allograft for primary PCLR. STUDY DESIGN: Systematic review. METHODS: A systematic review was performed by searching PubMed, the Cochrane Library, and EMBASE to locate studies (level of evidence I-III) comparing clinical outcomes of autograft versus allograft in patients undergoing primary PCLR with the conventional transtibial technique...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28594500/patellofemoral-arthroplasty-an-evolving-science
#6
Jess H Lonner
Patellofemoral arthroplasty (PFA) has long been a clinical option for patients with isolated patellofemoral arthritis. However, a high rate of failure as a result of patellar instability related to component malposition, soft-tissue imbalance, errant surgical techniques, and poor trochlear implant designs contributed to the underutilization of PFA. The evolution of surgical indications, trochlear implant design, component positioning, and soft-tissue balance has led to improved patellar tracking, fewer failures related to patellar instability, and improved functional outcomes...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28355681/a-biomechanical-study-of-two-distinct-methods-of-anterior-cruciate-ligament-rupture-and-a-novel-surgical-reconstruction-technique-in-a-small-animal-model-of-posttraumatic-osteoarthritis
#7
Austin J Ramme, Matin S Lendhey, Eric J Strauss, Oran D Kennedy
Small animal models are critical for studies of sports-related knee injury and disease such as posttraumatic osteoarthritis (PTOA) following anterior cruciate ligament (ACL) rupture. In such models, ACL damage can be achieved by surgical transection or, using a more recent innovation, by noninvasive biomechanical means. Whether these approaches differentially alter normal mechanics is unknown. Furthermore, while surgical reconstruction of ruptured ACL can greatly improve joint stability, its effect on PTOA development is also unclear...
March 29, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28289890/kinematic-analysis-of-stair-climbing-in-rotating-platform-cruciate-retaining-and-posterior-stabilized-mobile-bearing-total-knee-arthroplasties
#8
Koji Murakami, Satoshi Hamai, Ken Okazaki, Satoru Ikebe, Hiroyuki Nakahara, Hidehiko Higaki, Takeshi Shimoto, Hideki Mizu-Uchi, Umito Kuwashima, Yukihide Iwamoto
INTRODUCTION: The aim of our study was to compare and contrast the effects of two types of mobile-bearing total knee arthroplasties (TKA), namely, the cruciate-retaining (CR) and posterior-stabilized (PS) TKAs, on clinical outcomes and in vivo kinematics during stair climbing. MATERIALS AND METHODS: The Press-Fit Condylar Sigma rotating platform was used for both CR and PS TKAs. Patient-reported outcomes were assessed using the 2011 Knee Society Score. Quadriceps muscle strength was evaluated by isokinetic dynamometry...
May 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28259491/does-tibial-slope-affect-perception-of-coronal-alignment-on-a-standing-anteroposterior-radiograph
#9
Adam J Schwartz, Bheeshma Ravi, Mark J Kransdorf, Henry D Clarke
BACKGROUND: A standing anteroposterior (AP) radiograph is commonly used to evaluate coronal alignment following total knee arthroplasty (TKA). The impact of coronal alignment on TKA outcomes is controversial, perhaps due to variability in imaging and/or measurement technique. We sought to quantify the effect of image rotation and tibial slope on coronal alignment. METHODS: Using a standard extramedullary tibial alignment guide, 3 cadaver legs were cut to accept a tibial tray at 0°, 3°, and 7° of slope...
February 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28258329/function-and-strain-of-the-anterolateral-ligament-part-i-biomechanical-analysis
#10
Björn Holger Drews, Oliver Kessler, Wolfgang Franz, Lutz Dürselen, Maren Freutel
PURPOSE: Because reconstruction of the anterior cruciate ligament (ACL) in a double-bundle technique did not solve the problem of persistent rotatory laxity after surgery, new potential answers to this issue are of great interest. One of these is an extraarticular stabilization based on the rediscovery of the anterolateral ligament (ALL). Knowledge about its biomechanical function and benchmark data for an optimal reconstruction remain lacking. Therefore, the purpose of this study was to assess the function of the ALL under passive motion, anterior tibial translation and tibial rotational moments...
April 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28231644/mid-term-outcomes-of-anterior-cruciate-ligament-reconstruction-with-far-anteromedial-portal-technique
#11
Yoon Sang Jeon, Sung Wook Choi, Ju Hyun Park, Jae Sik Yoon, Jung Sub Shin, Myung Ku Kim
Purpose: The purpose of this study was to evaluate the mid-term outcomes of anatomic anterior cruciate ligament (ACL) reconstruction using two anteromedial (AM) portals by comparing with short-term follow-up results. Materials and Methods: Fifty patients who were treated by ACL reconstruction using a two AM portal technique were evaluated retrospectively. The follow-up period was at least 5 years. The mean follow-up period was 68.5±13.9 months. The mid-term clinical outcomes were compared with short-term (≥12 months) results...
March 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28164055/proximal-tibial-epiphysis-injury-flexion-type-salter-harris-type-1
#12
Pratik Israni, Mangesh Panat
INTRODUCTION: Fractures of the proximal tibial epiphysis rare. It has been estimated that fractures of the upper tibial epiphysis account for 0.5-3.1% of all epiphyseal injuries. Who had no neurovascular deficit, with fixed extension deformity at the left knee was treated early with closed reduction techniques. CASE REPORT: We present a case of a 16-year-old boy who while playing cricket on the road was hit by a car. The patient presented in emergency room with extremely swollen knee and soft tissue swelling (hemarthrosis), he was unable to lift his leg actively due to severe pain because of hamstrings spasm, and he had no wound over his left knee and had no other associated injuries...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28159042/influence-of-lower-limb-rotation-on-hindfoot-alignment-using-a-conventional-two-dimensional-radiographic-technique
#13
L Baverel, J Brilhault, G Odri, M Boissard, François Lintz
BACKGROUND: Rotation is one of the variables explaining lack of reproducibility in assessing hindfoot alignment. The hypothesis for this study was that a mathematical model predicts how this modifies radiographic hindfoot alignment measurements. METHODS: A cadaveric lower limb, disjointed at knee level, was used. Sagittal and coronal planes were fixed using a custom clamp. Standard AP views were shot every five degrees and measured hindfoot alignments were compared to theoretical values obtained from a mathematical simulation...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28046490/su-f-t-406-verification-of-total-body-irradiation-commissioned-mu-lookup-table-accuracy-using-treatment-planning-system-for-wide-range-of-patient-sizes
#14
D Lewis, P Chi, R Tailor, M Aristophanous, S Tung
PURPOSE: To verify the accuracy of total body irradiation (TBI) measurement commissioning data using the treatment planning system (TPS) for a wide range of patient separations. METHODS: Our institution conducts TBI treatments with an 18MV photon beam at 380cm extended SSD using an AP/PA technique. Currently, the monitor units (MU) per field for patient treatments are determined using a lookup table generated from TMR measurements in a water phantom (75 × 41 × 30...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27825937/effects-of-measurement-methods-for-tibial-rotation-axis-on-the-morphometry-in-korean-populations-by-gender
#15
Kyoung-Tak Kang, Juhyun Son, Oh-Ryong Kwon, Changhyun Baek, Dong Beom Heo, Kyoung-Mi Park, Ho-Joong Kim, Yong-Gon Koh
BACKGROUND: There have been arguments for methodology in tibial rotation axis measurement, which accordingly determines the morphometry of the proximal tibia in total knee arthroplasty. The morphometry of the proximal tibia for the Korean population is determined by gender, based on the anatomical tibial axis and reliable rotational orientation in knee replacements, to evaluate the size suitability of the currently available prostheses in Korea. METHODS: This study reconstructed the MRI images in three-dimensions for identification and measurement of the mediolateral (ML) and anteroposterior (AP) lengths of the proximal tibia and the tibial aspect ratio (ML/AP) using proximal tibial anthropometric data for 700 osteoarthritic knees (587 females and 113 males)...
January 2017: Knee
https://www.readbyqxmd.com/read/27704318/what-differences-in-morphologic-features-of-the-knee-exist-among-patients-of-various-races-a-systematic-review
#16
REVIEW
T K Kim, Mark Phillips, Mohit Bhandari, John Watson, Rajesh Malhotra
BACKGROUND: Most TKA prostheses are designed based on the anatomy of white patients. Individual studies have identified key anthropometric differences between the knees of the white population and other major ethnic groups, yet there is limited understanding of what these findings may indicate if analyzed collectively. QUESTION/PURPOSE: What are the differences in morphologic features of the distal femur and proximal tibia among and within various ethnicities? METHODS: A systematic review of the PubMed database and a hand-search of article bibliographies identified 235 potentially eligible English-language studies...
January 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27683299/the-one-leg-standing-radiograph-an-improved-technique-to-evaluate-the-severity-of-knee-osteoarthritis
#17
P Pinsornsak, K Naratrikun, S Kanitnate, T Sangkomkamhang
OBJECTIVES: The purpose of this study was to compare the joint space width between one-leg and both-legs standing radiographs in order to diagnose a primary osteoarthritis of the knee. METHODS: Digital radiographs of 100 medial osteoarthritic knees in 50 patients were performed. The patients had undergone one-leg standing anteroposterior (AP) views by standing on the affected leg while a both-legs standing AP view was undertaken while standing on both legs. The severity of the osteoarthritis was evaluated using the joint space width and Kellgren-Lawrence (KL) radiographic classification...
September 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/27166758/weight-bearing-condyle-motion-of-the-knee-before-and-after-cruciate-retaining-tka-in-vivo-surgical-transepicondylar-axis-and-geometric-center-axis-analyses
#18
Dimitris Dimitriou, Tsung-Yuan Tsai, Kwan Kyu Park, Ali Hosseini, Young-Min Kwon, Harry E Rubash, Guoan Li
An equal knee joint height during flexion and extension is of critical importance in optimizing soft-tissue balancing following total knee arthroplasty (TKA). However, there is a paucity of data regarding the in-vivo knee joint height behavior. This study evaluated in-vivo heights and anterior-posterior (AP) translations of the medial and lateral femoral condyles before and after a cruciate-retaining (CR)-TKA using two flexion axes: surgical transepicondylar axis (sTEA) and geometric center axis (GCA). Eleven osteoarthritis (OA) knee patients were studied during a weight-bearing single leg lunge, using a validated dual fluoroscopic imaging system (DFIS) based tracking technique...
June 14, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27106125/does-anteromedial-portal-drilling-improve-footprint-placement-in-anterior-cruciate-ligament-reconstruction
#19
Sally Arno, Christopher P Bell, Michael J Alaia, Brian C Singh, Laith M Jazrawi, Peter S Walker, Ankit Bansal, Garret Garofolo, Orrin H Sherman
BACKGROUND: Considerable debate remains over which anterior cruciate ligament (ACL) reconstruction technique can best restore knee stability. Traditionally, femoral tunnel drilling has been done through a previously drilled tibial tunnel; however, potential nonanatomic tunnel placement can produce a vertical graft, which although it would restore sagittal stability, it would not control rotational stability. To address this, some suggest that the femoral tunnel be created independently of the tibial tunnel through the use of an anteromedial (AM) portal, but whether this results in a more anatomic footprint or in stability comparable to that of the intact contralateral knee still remains controversial...
July 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/26972809/functional-recovery-following-primary-acl-repair-with-dynamic-intraligamentary-stabilization
#20
Lorenz Büchler, Dorina Regli, Dimitrios Stergios Evangelopoulos, Kathrin Bieri, Sufian S Ahmad, Anna Krismer, Thorsten Muller, Sandro Kohl
BACKGROUND: Recently, a new technique, dynamic intraligamentary stabilization (DIS) was introduced for the acute repair of ACL ruptures. The purpose of this study was to report the functional recovery for patients undergoing acute anterior cruciate ligament (ACL) repair alongside DIS. METHODS: Forty five patients sustaining acute ACL rupture and treated with DIS repair were retrospectively evaluated. Limb symmetry index of the hop test as well as knee function by means of range of motion, knee swelling, pain and maximum strength were evaluated...
June 2016: Knee
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