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tibial slope

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https://www.readbyqxmd.com/read/27928547/relationship-of-acl-injury-and-posterior-tibial-slope-with-patient-age-sex-and-race
#1
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/27923624/a-novel-3d-approach-for-determination-of-frontal-and-coronal-plane-tibial-slopes-from-mr-imaging
#2
Amirhesam Amerinatanzi, Rodney Summers, Kaveh Ahmadi, Vijay K Goel, Timothy E Hewett, Edward Nyman
BACKGROUND: The proximal tibia is geometrically complex, asymmetrical, and variable, is heavily implicated in arthrokinematics of the knee joint, and thus a contributor to knee pathologies such as non-contact anterior cruciate ligament injury. Medial, lateral, and coronal tibial slopes are anatomic parameters that may increase predisposition to knee injuries, but the extent to which each contributes has yet to be fully realized. Previously, two-dimensional methods have quantified tibial slopes, but more reliable 3D methods may prove advantageous...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27904715/computer-assisted-navigation-in-high-tibial-osteotomy
#3
REVIEW
Sang Jun Song, Dae Kyung Bae
Computer-assisted navigation is used to improve the accuracy and precision of correction angles during high tibial osteotomy. Most studies have reported that this technique reduces the outliers of coronal alignment and unintended changes in the tibial posterior slope angle. However, more sophisticated studies are necessary to determine whether the technique will improve the clinical results and long-term survival rates. Knowledge of the navigation technology, surgical techniques and potential pitfalls, the clinical results of previous studies, and understanding of the advantages and limitations of the computer-assisted navigation are crucial to successful application of this new technique in high tibial osteotomy...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27894173/open-wedge-high-tibial-osteotomy-and-combined-arthroscopic-surgery-in-severe-medial-osteoarthritis-and-varus-malalignment-minimum-5-year-results
#4
Moon-Jib Yoo, Yong-Eun Shin
Purpose: To evaluate the radiologic and functional outcomes of medial open wedge high tibial osteotomy (HTO) combined with arthroscopic procedure in patients with medial osteoarthritis. Materials and Methods: From June 1996 to March 2010, 26 patients (32 knees) who underwent medial open wedge osteotomy and arthroscopic operation for medial osteoarthritis were retrospectively reviewed. Measurements included hip-knee-ankle (HKA) angle, femorotibial angle, medial proximal tibial angle, posterior tibial slope angle, and Kellgren-Lawrence grade...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27890319/diachronic-changes-in-size-and-shape-of-human-proximal-tibia-in-central-europe-during-the-latest-1200-years
#5
H Brzobohatá, V Krajíček, Z Horák, P Sedlak, J Velemínská
During the past twelve centuries, the stature of Central European inhabitants has increased significantly with corresponding changes in the size of lower limb bones. The aim of our study was to determine whether these changes have occurred strictly in relation to size or if the shape of skeletal structures has been altered simultaneously. Diachronic size and shape changes in the proximal part of tibia in a Central European population (Czech Republic) were studied using geometric morphometrics (principal components analysis, Hotelling's test, linear discriminant analysis)...
October 13, 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27888317/effect-of-tibial-slope-changes-on-femorotibial-contact-kinematics-after-cruciate-retaining-total-knee-arthroplasty
#6
Xi-Qing Pan, A-Qin Peng, Fei Wang, Feng Li, Xi-Zeng Nie, Xi Yang, Gang Ji, Xiao-Meng Wang
PURPOSE: The present study was undertaken to evaluate the effect of tibial slope (TS) changes on the femorotibial articular contact kinematics in subjects undergoing posterior cruciate-retaining total knee arthroplasty (CRTKA). METHODS: Eighteen knees in nine patients with medial osteoarthritis who underwent CRTKA using the same size prosthesis were analysed preoperatively and 2 years after TKA. TS changes were calculated on lateral radiographs taken before and after TKA...
November 25, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27876490/medial-open-wedge-high-tibial-osteotomy-for-varus-malunited-tibial-plateau-fractures
#7
S R Sundararajan, H S Nagaraja, S Rajasekaran
PURPOSE: To analyze radiologic and functional outcomes of varus malunited tibial plateau fractures managed with medial open wedge high tibial osteotomy (MOHTO). METHODS: Eighteen patients with symptomatic varus malunited tibial plateau fractures with less than stage II arthritic changes managed from July 2009 to October 2013 were included. Patients with complex intra-articular step malunions and severe arthritic changes (stage III and IV) were excluded. Initially, diagnostic arthroscopy was performed followed by MOHTO stabilized with locking plate and tricortical autograft (n = 11, 61%) or a Puddu plate and allograft (n = 7, 39%)...
November 19, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27876267/open-wedge-high-tibial-osteotomy-using-three-dimensional-printed-models-experimental-analysis-using-porcine-bone
#8
Jun-Dae Kwun, Hee-June Kim, Jaeyoung Park, Il-Hyung Park, Hee-Soo Kyung
BACKGROUND: The purpose of this study was to evaluate the usefulness of three-dimensional (3D) printed models for open wedge high tibial osteotomy (HTO) in porcine bone. METHODS: Computed tomography (CT) images were obtained from 10 porcine knees and 3D imaging was planned using the 3D-Slicer program. The osteotomy line was drawn from the three centimeters below the medial tibial plateau to the proximal end of the fibular head. Then the osteotomy gap was opened until the mechanical axis line was 62...
November 18, 2016: Knee
https://www.readbyqxmd.com/read/27871654/surgical-management-and-treatment-of-the-anterior-cruciate-ligament-deficient-knee-with-malalignment
#9
REVIEW
Matthew D Crawford, Lee H Diehl, Annunziato Amendola
Varus malalignment and an increased tibial slope can result in instability in an anterior cruciate ligament (ACL)-deficient knee. Malalignment can also be a cause of recurrent instability following ACL reconstruction. Varus malalignment can contribute to loosening or failure of primary ACL reconstruction and contribute to progressive medial compartment arthritis. High tibial osteotomies performed in conjunction with ACL reconstruction can improve alignment, restore anterior knee stability, and help reduce the advancement of arthritis...
January 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/27861256/nonmodifiable-risk-factors-for-anterior-cruciate-ligament-injury
#10
Meghan J Price, Maria Tuca, Frank A Cordasco, Daniel W Green
PURPOSE OF REVIEW: As anterior cruciate ligament (ACL) injury is becoming increasingly prevalent in the population of active children and young adolescents, it is crucial to be aware of both the modifiable and nonmodifiable factors that place this population at increased ACL injury risk. Historically, there has not been a definitive consensus on all of these risk factors-particularly the nonmodifiable ones. RECENT FINDINGS: The present review has accumulated the most recent evidence for the nonmodifiable risk factors in ACL injury focusing particularly on female gender, generalized joint laxity, knee recurvatum, increased lateral tibial slope, decreased intercondylar notch width, structural lower extremity valgus, limb length discrepancy, family history, and history of contralateral knee ACL injury...
November 16, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27825593/a-soft-tissue-preserving-method-for-evaluating-the-impact-of-posterior-tibial-slope-on-kinematics-during-cruciate-retaining-total-knee-arthroplasty-a-validation-study
#11
Yifei Dai, Laurent D Angibaud, Jean-Yves Jenny, Cyril Hamad, Amaury Jung, Michael B Cross
BACKGROUND: The reconstructed posterior tibial slope (PTS) plays a significant role in restoring knee kinematics in cruciate-retaining total knee arthroplasty. However, conventional methods for the investigation of PTS can be limited by sample size or prone to errors due to damages to the bone and/or soft tissues. The purpose of this study was to validate a novel method for the evaluation of the effects of PTS on knee kinematics. METHODS: Seven computer-assisted cruciate-retaining TKAs were performed by two surgeons on healthy cadaveric knees...
December 2016: Knee
https://www.readbyqxmd.com/read/27776906/the-anteroposterior-axis-of-the-proximal-tibia-can-change-after-tibial-resection-in-total-knee-arthroplasty-computer-simulation-using-asian-osteoarthritis-knees
#12
Tetsuro Ushio, Hideki Mizu-Uchi, Ken Okazaki, Yuan Ma, Umito Kuwashima, Yukihide Iwamoto
BACKGROUND: We evaluated the effect of cutting surface on the anteroposterior (AP) axis of the proximal tibia using a 3-dimensional (3D) bone model to ensure proper tibial rotational alignment in total knee arthroplasty. METHODS: 3D bone models were reconstructed from the preoperative computed tomography data of 93 Japanese osteoarthritis knees with varus deformity. The AP axis was defined as the perpendicular bisector of the medial and lateral condylar centers in a 3D coordinate system...
September 28, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27757780/comparison-of-osteoconductivity-and-absorbability-of-beta-tricalcium-phosphate-and-hydroxyapatite-in-clinical-scenario-of-opening-wedge-high-tibial-osteotomy
#13
Kwang-Jun Oh, Young-Bong Ko, Sagar Jaiswal, In-Cheul Whang
The purpose of this study was to compare the osteoconductivity, and absorbability of hydroxyapatite or beta-tricalcium phosphate in clinical scenario of opening wedge high tibial osteotomy Total 41 knees of 40 patients with follow up period of more than 1 year were enrolled. These patients were divided into two groups, Group I (22 knees, 21 patients) used hydroxyapatite and Group II (19 knees, 19 patients) used beta-tricalcium phosphate as a substitute in the opening gap. According to proven method, the osteoconductivity was assessed radiographically by the extent of new bone formation at osteotomy space and absorbability was evaluated by measuring the area occupied by substitute at immediate postoperative, postoperative 6 months and 1 year...
December 2016: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27755640/relationship-between-posterior-inferior-tibial-slope-and-bilateral-noncontact-acl-injury
#14
Steven T Hendrix, Austin M Barrett, Bopha Chrea, William H Replogle, Josie M Hydrick, Gene R Barrett
Is there a correlation between increased posterior-inferior tibial slope angle and noncontact anterior cruciate ligament (ACL) injury? Does increasing the posterior-inferior tibial slope angle increase the risk of bilateral ACL injury? A computerized relational database (Access 2007; Microsoft Inc, Redmond, Washington) was used to conduct a retrospective review of patients undergoing bilateral or unilateral ACL reconstruction surgery or treatment by a single surgeon between 1995 and 2013. Included in the study were patients with bilateral and unilateral ACL injuries and patellofemoral pain syndrome with no associated ACL deficiency...
October 18, 2016: Orthopedics
https://www.readbyqxmd.com/read/27718092/white-tailed-deer-as-an-ex-vivo-knee-model-joint-morphometry-and-acl-rupture-strength
#15
Nicole L Zaino, Mark J Hedgeland, Mario J Ciani, Alexander Martin Clark, Laurel Kuxhaus, Arthur J Michalek
Animal joints are valuable proxies for those of humans in biomechanical studies, however commonly used quadruped knees differ greatly from human knees in scale and morphometry. To test the suitability of the cervine stifle joint (deer knee) as a laboratory model, gross morphometry, ACL cross section, and ACL rupture strength were measured and compared to values previously reported for the knees of humans and commonly studied animals. Twelve knee joints from wild white-tailed deer were tested. Several morphometry parameters, including bicondylar width (53...
October 7, 2016: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27703415/handheld-navigation-device-and-patient-specific-cutting-guides-result-in-similar-coronal-alignment-for-primary-total-knee-arthroplasty-a-retrospective-matched-cohort-study
#16
Michael E Steinhaus, Alexander S McLawhorn, Shawn S Richardson, Patrick Maher, David J Mayman
BACKGROUND: Proper alignment of total knee arthroplasty (TKA) is essential for TKA function and may reduce the risk of aseptic failure. Technologies that prevent malalignment may reduce the risk of revision surgery. QUESTIONS/PURPOSES: The purpose of this study was to compare two competing TKA systems that purport improved alignment: patient-specific instrumentation (PSI), and a handheld portable navigation device (NAV). METHODS: After IRB approval, 49 consecutive PSI TKAs (40 patients) were matched based on preoperative characteristics to 49 NAV TKAs (40 patients) performed by a single surgeon...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/27665094/outcome-reporting-following-navigated-high-tibial-osteotomy-of-the-knee-a-systematic-review
#17
James Yan, Volker Musahl, Jeffrey Kay, Moin Khan, Nicole Simunovic, Olufemi R Ayeni
PURPOSE: This systematic review evaluates radiographic and clinical outcome reporting following navigated high tibial osteotomy (HTO). Conventional HTO was used as a control to compare outcomes and furthermore investigate the quality of evidence in studies reporting outcomes for navigated HTO. It was hypothesized that navigated HTO will show superior clinical and radiographic outcomes compared to conventional HTO. METHODS: Two independent reviewers searched PubMed, Ovid (MEDLINE), EMBASE, and Cochrane databases for studies reporting outcomes following navigated HTO...
September 24, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27651396/tibial-slope-strongly-influences-knee-stability-after-posterior-cruciate-ligament-reconstruction-a-prospective-5-to-15-year-follow-up
#18
Clemens Gwinner, Andreas Weiler, Manoussos Roider, Frederik M Schaefer, Tobias M Jung
BACKGROUND: The reported failure rate after posterior cruciate ligament (PCL) reconstruction remains high. Previous studies have shown that the tibial slope (TS) influences sagittal plane laxity. Consequently, alterations of TS might have an effect on postoperative knee stability after PCL reconstruction. HYPOTHESIS: We hypothesized that flattening of TS is associated with increased posterior laxity after PCL reconstruction. STUDY DESIGN: Cohort study; Level of evidence 3...
September 20, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27626010/surgical-management-of-tibial-plateau-fractures-with-3-5-mm-simple-plates
#19
Abolfazl Bagherifard, Mahmoud Jabalameli, Hosseinali Hadi, Mohammad Rahbar, Mohammadreza Minator Sajjadi, Ali Jahansouz, Hossein Karimi Heris
BACKGROUND: Tibial plateau fractures can be successfully fixed utilizing 3.5 mm locking plates. However, there are some disadvantages to using these plates. OBJECTIVES: In the current prospective study, we investigated the outcome of treating different types of tibial plateau fractures with 3.5 mm simple plates which, to our knowledge, has not been evaluated in previous studies. MATERIALS AND METHODS: Between 2011 and 2013, 32 patients aged 40 ± 0...
May 2016: Trauma Monthly
https://www.readbyqxmd.com/read/27624178/high-load-preconditioning-of-human-soft-tissue-hamstring-grafts-an-in-vitro-biomechanical-analysis
#20
W Charles Lockwood, Daniel Cole Marchetti, Kimi D Dahl, Jacob D Mikula, Brady T Williams, Matthew M Kheir, Travis Lee Turnbull, Robert F LaPrade
PURPOSE: In order to minimize viscoelastic elongation of ACL reconstruction grafts, preconditioning protocols have been employed in clinical practice prior to final graft fixation. The purpose of this study was to evaluate two separate high-load static preconditioning protocols of double-looped semitendinosus-gracilis grafts and compare these results to both a current clinical protocol and a control group with no preconditioning protocol applied. It was hypothesized that a high-load, static preconditioning protocol would minimize graft elongation during a simulated progressive early rehabilitation compared to both the "89 N" clinical protocol and control groups...
September 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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