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tibial slope

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https://www.readbyqxmd.com/read/28653182/coronal-femoral-tka-position-significantly-influences-in-vivo-patellar-loading-in-unresurfaced-patellae-after-primary-total-knee-arthroplasty
#1
Omer Slevin, Florian A Schmid, Filippo-Franco Schiapparelli, Helmut Rasch, Felix Amsler, Michael T Hirschmann
PURPOSE: As patellar tracking and loading is influenced by tibial tuberosity and trochlear groove (TT-TG) distance, patellar height, thickness and tilt as well as TKA component position, it was our hypothesis that these parameters significantly correlate with patellar BTU intensity and localization in SPECT/CT. The purpose of the study was to investigate whether TKA component position as well as the height, thickness and tilt of the unresurfaced patella influences the intensity and the distribution pattern of BTU in SPECT/CT...
June 26, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28642671/subchondral-raft-construction-with-locking-plates-for-the-treatment-of-schatzker-type-ii-fractures
#2
Cemil Kayali, Caner Citak, Taskin Altay, Zafer Kement
OBJECTIVES: To evaluate the functional and radiological results of Schatzker type II fractures treated via subchondral raft screws combined with locking plates. METHODS: Twenty-four individuals were enrolled in this study between 2010 and 2014. The depressed joint line was elevated and the defect was filled with allograft. Next, two or three subchondral screws were placed in combination with a locking plate. At the last follow-up, clinical and radiological data were recorded...
May 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28638170/atlas-based-automatic-measurements-of-the-morphology-of-the-tibiofemoral-joint
#3
M Brehler, G Thawait, W Shyr, J Ramsay, J H Siewerdsen, W Zbijewski
PURPOSE: Anatomical metrics of the tibiofemoral joint support assessment of joint stability and surgical planning. We propose an automated, atlas-based algorithm to streamline the measurements in 3D images of the joint and reduce user-dependence of the metrics arising from manual identification of the anatomical landmarks. METHODS: The method is initialized with coarse registrations of a set of atlas images to the fixed input image. The initial registrations are then refined separately for the tibia and femur and the best matching atlas is selected...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28637433/postoperative-alignment-of-tka-in-patients-with-severe-preoperative-varus-or-valgus-deformity-is-there-a-difference-between-surgical-techniques
#4
Stefan Rahm, Roland S Camenzind, Andreas Hingsammer, Christopher Lenz, David E Bauer, Mazda Farshad, Sandro F Fucentese
BACKGROUND: There have been conflicting studies published regarding the ability of various total knee arthroplasty (TKA) techniques to correct preoperative deformity. The purpose of this study was to compare the postoperative radiographic alignment in patients with severe preoperative coronal deformity (≥10° varus/valgus) who underwent three different TKA techniques; manual instrumentation (MAN), computer navigated instrumentation (NAV) and patient specific instrumentation (PSI). METHODS: Patients, who received a TKA with a preoperative coronal deformity of ≥10° with available radiographs were included in this retrospective study...
June 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28633973/patellofemoral-osteoarthritis-progression-and-alignment-changes-after-open-wedge-high-tibial-osteotomy-do-not-affect-clinical-outcomes-at-mid-term-follow-up
#5
Kenichi Goshima, Takeshi Sawaguchi, Kenji Shigemoto, Shintaro Iwai, Akira Nakanishi, Ken Ueoka
PURPOSE: To evaluate the clinical and radiological outcomes of open-wedge high tibial osteotomy (OWHTO) with respect to the patellofemoral joint and to assess whether patellofemoral osteoarthritis (OA) progression and alignment changes after OWHTO affect clinical outcomes. METHODS: Inclusion criteria were consecutive patients who underwent OWHTO from March 2005 to September 2013. Exclusion criteria were loss to follow-up within 2 years and absence of second-look arthroscopy findings at the time of plate removal...
June 17, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28600607/-osteotomies-around-the-knee-for-ligament-insufficiency
#6
REVIEW
M J Feucht, T Tischer
BACKGROUND: The osseous geometry of the lower limb has a significant impact on knee instability after ligament injuries, and osseous malalignment has been shown to be a significant risk factor for the failure of ligament reconstruction procedures. Therefore, osteotomies around the knee have gained importance as a combined or isolated treatment option in the ligament deficient and malaligned knee. In addition to unloading of an arthritic knee compartment, osteotomies are also performed to protect a reconstructed ligament and to stabilize the joint without ligament surgery...
June 9, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28597058/-flexion-and-extension-osteotomy-of-the-knee
#7
T Diermeier, A B Imhoff, K Beitzel
OBJECTIVES: Flexion and extension osteotomy of the knee for symptomatic malalignment in the sagittal plane. INDICATIONS: Congenital/posttraumatic bony deficiencies in flexion/pathologic hyperextension in the knee. Additional treatment for ligament reconstruction. CONTRAINDICATIONS: Absolute: Infection, critical soft tissue situation, circulatory disorders. Relative: Osteoporosis, heavy smoker, obesity, reduced patient compliance. SURGICAL TECHNIQUE: Diagnostic arthroscopy of the knee...
June 9, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28594528/international-perspective-on-revision-anterior-cruciate-ligament-reconstruction-what-have-we-been-missing
#8
Mohammad Humza Ansari, Steven Claes, Daniel C Wascher, Philippe Neyret, Michael J Stuart, Aaron J Krych
Primary anterior cruciate ligament (ACL) reconstruction is a common orthopaedic procedure. A graft failure rate of 5% to 10% after primary ACL reconstruction has resulted in an increased need for revision ACL reconstruction. ACL reconstruction failure etiologies include trauma, technical errors, and biologic factors. Based on the current literature, the outcomes of revision ACL reconstruction are clearly inferior compared with those of primary reconstruction. A thorough patient evaluation, including surgical history, a physical examination, and imaging studies, is crucial in the assessment of a failed ACL reconstruction...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28592075/-influence-of-tibial-component-slope-on-short-term-clinical-outcome-for-oxford-unicompartmental-knee-arthroplasty
#9
L Y Ma, W S Guo, Q D Zhang
Objective: To investigate the effects of tibial component slope change after microplasty (MP) Oxford unicompartmental knee arthroplasty (UKA) on short-term clinical outcome. Methods: A total of 116 patients(128 UKAs)underwent UKA in Department of Orthopaedic Surgery of China-Japan Friendship Hospital between January 2014 and December 2015 were retrospectively reviewed. Totally 100 patients (108 UKAs) were finally included in the study. There were 31 males and 69 females, aging from 47 to 90 years (mean 67.2 years)...
June 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28590374/return-to-sport-after-pediatric-anterior-cruciate-ligament-reconstruction-and-its-effect-on-subsequent-anterior-cruciate-ligament-injury
#10
Travis J Dekker, Jonathan A Godin, Kevin M Dale, William E Garrett, Dean C Taylor, Jonathan C Riboh
BACKGROUND: Anterior cruciate ligament (ACL) graft failure and contralateral ACL tears are more frequent in children and adolescents than adults. The reasons for higher subsequent injury rates in this population are incompletely understood. METHODS: We analyzed a continuous cohort of patients who were <18 years of age. Subjects underwent isolated, primary ACL reconstruction with autograft between 2006 and January 1, 2014, and had a minimum 2-year follow-up. Return-to-sport characteristics were described, and multivariable Cox regression modeling was used to identify predictors of a second ACL injury...
June 7, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28587889/corrigendum-to-an-anatomic-investigation-into-the-relationship-between-posterior-condylar-offset-and-posterior-tibial-slope-of-one-thousand-one-hundred-thirty-eight-cadaveric-knees-the-journal-of-arthroplasty-32-2017-1659-1664
#11
https://www.readbyqxmd.com/read/28579444/three-dimensional-computed-tomography-analysis-of-the-posterior-tibial-slope-in-100-knees
#12
Jade Pei Yuik Ho, Azhar M Merican, Muhammad Sufian Hashim, Azlina A Abbas, Chee Ken Chan, Jamal A Mohamad
BACKGROUND: The posterior tibial slope (PTS) is an important consideration in knee arthroplasty. However, there is still no consensus for the optimal slope. The objectives of this study were (1) to reliably determine the native PTS in this population using 3-dimensional computed tomography scans and (2) to determine the normal reference range for PTS in this population. METHODS: One hundred computed tomography scans of disease-free knees were analyzed. A 3-dimensional reconstructed image of the tibia was generated and aligned to its anatomic axis in the coronal and sagittal planes...
May 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28579132/optimization-of-sagittal-and-coronal-planes-with-robotic-assisted-unicompartmental-knee-arthroplasty
#13
Michael A Gaudiani, Benedict U Nwachukwu, Jayesh V Baviskar, Mrinal Sharma, Anil S Ranawat
BACKGROUND: One of the anatomic goals of total knee arthroplasty (TKA) is optimizing in the coronal and sagittal plane. Accurate alignments of both planes have been correlated to functional outcome and range of motion. There is a paucity of evidence on the accuracy of unicompartmental knee arthroplasty (UKA) in balancing biplanar knee alignment - specifically sagittal plane alignment. Because robotic assisted UKA has an advantage of more accurately manipulating sagittal plane for optimal alignment and kinematics based on pre-operative and intraoperative CT planning we assessed the accuracy...
June 1, 2017: Knee
https://www.readbyqxmd.com/read/28578799/tibial-slope-in-total-ankle-arthroplasty-anterior-or-lateral-approach
#14
Federico Giuseppe Usuelli, Camilla Maccario, Cristian Indino, Luigi Manzi, Christopher Edward Gross
BACKGROUND: A new total ankle arthroplasty (TAA) system performed through a lateral approach provides direct visualization of the centre of rotation, allowing for accurate reconstruction of the joint alignment and less bone resection. Radiographic references are needed to describe deformities and plan the surgical procedures. The tibial slope is an important factor when treating malalignment. The aim of this study is to show if there is any difference regarding the post-operative tibial slope (β angle) measurement comparing a fixed-bearing TAA through a lateral approach and a mobile-bearing TAA through an anterior approach...
June 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28561157/high-varus-angle-and-lower-posterior-tibial-slope-associated-with-pcl-injury-in-cruciate-retaining-total-knee-arthroplasty-an-mri-study
#15
Haluk Çabuk, Yunus İmren, Ali Çağrı Tekin, Süleyman Semih Dedeoğlu, Hakan Gürbüz
No abstract text is available yet for this article.
May 23, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28560546/medial-parapatellar-approach-leads-to-internal-rotation-of-tibial-component-in-total-knee-arthroplasty
#16
Filippo-Franco Schiapparelli, Felix Amsler, Michael T Hirschmann
PURPOSE: The purpose of this study was to investigate if the type of approach [medial parapatellar approach (MPA) versus lateral parapatellar approach with tibial tubercle osteotomy (LPA)] influences rotation of femoral and/or tibial component and leg axis in total knee arthroplasty (TKA). It was the hypothesis that MPA leads to an internally rotated tibial TKA component. METHODS: This study included 200 consecutive patients in whom TKA was performed using either a parapatellar medial (n = 162, MPA) or parapatellar lateral approach with tibial tubercle osteotomy (n = 38, LPA)...
May 30, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28538288/the-trajectory-of-short-and-long-term-recovery-of-tibial-shaft-fractures-following-intramedullary-nail-fixation
#17
Sebastian J Ko, Peter J O'Brien, Pierre Guy, Henry M Broekhuyse, Piotr A Blachut, Kelly A Lefaivre
OBJECTIVE: To determine the trajectory of recovery following tibial shaft fracture treated with intramedullary nail over the first five years, and to evaluate the magnitude of the changes in functional outcome at various time intervals. DESIGN: Prospective cohort study. SETTING: A level 1 trauma center. PATIENTS/PARTICIPANTS: 132 patients with tibial shaft fracture (OTA 42-A,B,C) were enrolled into the Center's prospectively enrolled orthopaedic trauma database between January 2005 and February 2010...
May 17, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28500391/anterior-referencing-of-tibial-slope-in-total-knee-arthroplasty-considerably-influences-knee-kinematics-a-musculoskeletal-simulation-study
#18
Marco A Marra, Marta Strzelczak, Petra J C Heesterbeek, Sebastiaan A W van de Groes, Dennis W Janssen, Bart F J M Koopman, Ate B Wymenga, Nico J J Verdonschot
PURPOSE: In total knee arthroplasty (TKA), the posterior tibial slope is not always reconstructed correctly, and the knee ligaments may become too tight in flexion. To release a tight flexion gap, surgeons can increase the posterior tibial slope using two surgical resection techniques: the anterior tibial cortex (ACR) or the centre of tibial plateau (CPR) referencing. It is not known how this choice affects the knee laxity and function during activities of daily living. The aim of this study was to investigate the effect of tibial slope on knee laxity, kinematics and forces during a squatting activity using computer simulation techniques...
May 12, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28493211/what-mechanisms-are-associated-with-tibial-component-failure-after-kinematically-aligned-total-knee-arthroplasty
#19
Alexander J Nedopil, Stephen M Howell, Maury L Hull
PURPOSE: Eight patients treated with kinematically-aligned (KA) total knee arthroplasty (TKA) presented with tibial component failure. We determined whether radiographic measurements and clinical characteristics are different between patients with and without tibial component failure to identify mechanisms of failure and strategies to reduce the risk. METHODS: Out of 3,212 primary TKAs (2,725 TKAs with a two-year minimum follow up), of which all were performed with KA, eight patients presented with tibial component failure...
May 11, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28484794/femoral-head-retroposition-as-a-potential-compensatory-mechanism-in-patients-with-a-severe-mismatch-between-pelvic-incidence-and-lumbar-lordosis
#20
Xiaofei Cheng, Kai Zhang, Xiaojiang Sun, Changqing Zhao, Hua Li, Jie Zhao
OBJECTIVE: Severe mismatch between pelvic incidence (PI) and lumbar lordosis (LL) leads to extra anterior displacement of the gravity line. The objective of this study is to investigate whether femoral head retroposition is a separate compensatory mechanism responsible for the extra anterior displacement. SUBJECTS AND METHODS: Based on the values of PI and LL, 94 patients were divided into the PI-LL match group (PI-LL ≤ 0°), the mild PI-LL mismatch group (20°> PI-LL >0°), and the severe PI-LL mismatch group (PI-LL ≥ 20°)...
May 9, 2017: Skeletal Radiology
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