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https://www.readbyqxmd.com/read/28433391/mechanisms-of-anterior-posterior-stability-of-the-knee-joint-under-load-bearing
#1
Ryan J Reynolds, Peter S Walker, John Buza
The anterior-posterior (AP) stability of the knee is an important aspect of functional performance. Studies have shown that the stability increases when compressive loads are applied, as indicated by reduced laxity, but the mechanism has not been fully explained. A test rig was designed which applied combinations of AP shear and compressive forces, and measured the AP displacements relative to the neutral position. Five knees were evaluated at compressive loads of 0, 250, 500, and 750N, with the knee at 15° flexion...
April 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28418753/intraosseous-pressure-monitoring-in-healthy-volunteers
#2
Joshua G Salzman, Nicholas M Loken, Sandi S Wewerka, Aaron M Burnett, Abigail E Zagar, Kent R Griffith, Peter L Bliss, Bjorn K Peterson, Christopher J Ward, Ralph J Frascone
STUDY OBJECTIVE: Invasively monitoring blood pressure through the IO device has not been thoroughly demonstrated. This study attempted to establish baseline values of IO pressure in a healthy human population. METHODS: This was a prospective, healthy volunteer, observational study. Participants had two IO devices placed (humerus and tibia), and participant IO pressures, vital signs, and pain scores were monitored for up to 60 minutes. Participants were contacted at 24-hours and 7 days post-testing to assess for adverse events...
April 18, 2017: Prehospital Emergency Care
https://www.readbyqxmd.com/read/28417183/patella-height-is-not-altered-by-descending-medial-open-wedge-high-tibial-osteotomy-hto-compared-to-ascending-hto
#3
Matthias Krause, Tobias Claus Drenck, Alexander Korthaus, Achim Preiss, Karl-Heinz Frosch, Ralph Akoto
PURPOSE: The primary purpose of the study was to gain insight into geometric changes of the patellar height (PH) and posterior tibial slope (PTS) after a biplanar ascending medial open-wedge high tibial osteotomy (HTO) compared to biplanar descending medial open-wedge HTO in patients with genu varum. METHODS: Sixty-four patients (mean age 45.2 ± 8.7 years, females n = 24, males n = 40) with varus malalignment and medial gonarthrosis were retrospectively studied...
April 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28389878/the-effects-of-different-hinge-positions-on-posterior-tibial-slope-in-medial-open-wedge-high-tibial-osteotomy
#4
Ho-Seung Jo, Jin-Sung Park, June-Ho Byun, Young-Bok Lee, Young-Lac Choi, Seong-Hee Cho, Dong-Kyu Moon, Sang-Hyuk Lee, Sun-Chul Hwang
PURPOSE: The purpose of this study was to determine the standard hinge position to minimize effects from medial open-wedge high tibial osteotomy (HTO) on the posterior tibial slope. METHODS: Sixteen cadaveric knees underwent medial open-wedge osteotomy using either the standard or the low hinge position. To define the standard hinge position, a line 3 cm inferior to the medial tibial plateau towards the fibular head and located its intersection with a longitudinal line 1 cm medial to the fibular shaft was drawn...
April 7, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28331933/conformation-of-the-proximal-tibia-and-cranial-cruciate-ligament-disease-in-small-breed-dogs
#5
Jan Janovec, Michal Kyllar, Duncan Midgley, Martin Owen
OBJECTIVES: To investigate the conformation of the proximal tibia in small breed dogs with and without cranial cruciate ligament disease (CCLD) and to identify morphologic abnormalities that may predispose to development of CCLD. METHODS: Mediolateral radiographs of the entire tibia of dogs <15 kg with surgically confirmed CCLD were retrospectively evaluated. Proximal tibial width (PTW), tibial plateau length (TPL), tibial plateau angle as described by Slocum and Slocum (sTPA), proximal tibial tuberosity angle (PTTA), tibial plateau angle as described by Inauen and colleagues (nTPA), and diaphyseal tibial width (DTW) were measured...
March 23, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28302427/association-between-tibial-plateau-slopes-and-anterior-cruciate-ligament-injury-a-meta-analysis
#6
Yi-Lun Wang, Tuo Yang, Chao Zeng, Jie Wei, Dong-Xing Xie, Yuan-Heng Yang, Hui-Zhong Long, Bei Xu, Yu-Xuan Qian, Shi-de Jiang, Guang-Hua Lei
PURPOSE: To investigate the associations of medial tibial plateau slope (MTPS), lateral tibial plateau slope (LTPS), and coronal tibial plateau slope (CTPS) with anterior cruciate ligament (ACL) injury both in the general population and in different gender subgroups. METHODS: PubMed, Ovid, Embase, and Scopus databases were searched through from inception to August 31, 2016. Observational studies reporting associations of MTPS/LTPS/CTPS with ACL injury were retrieved for analysis...
March 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28302132/long-term-results-and-comparison-of-the-three-different-high-tibial-osteotomy-and-fixation-techniques-in-medial-compartment-arthrosis
#7
Gökhan Polat, Halil İbrahim Balcı, Mehmet Fevzi Çakmak, Mehmet Demirel, Cengiz Şen, Mehmet Aşık
BACKGROUND: The purpose of this study is to report and analyze the long-term outcomes of the patients who underwent high tibial osteotomy (HTO) with three different techniques for the treatment of medial compartment arthrosis. METHODS: A total of 187 patients (195 knees) who underwent HTO between 1990 and 2010 were retrospectively evaluated. Eighty-eight knees, opening-wedge osteotomy with Puddu plate (group A); 51 knees, transverse osteotomy below the tubercle with external fixator (group B); and 29 knees, closing-wedge osteotomy with staple fixation (group C) were included in the study...
March 16, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28260200/increased-lateral-tibial-posterior-slope-is-related-to-tibial-tunnel-widening-after-primary-acl-reconstruction
#8
Soheil Sabzevari, Amir Ata Rahnemai-Azar, Humza S Shaikh, Justin W Arner, James J Irrgang, Freddie H Fu
PURPOSE: The purpose of the study was to determine the influence of femoral and tibial bone morphology on the amount of femoral and tibial tunnel widening after primary anatomic ACL reconstruction. It was hypothesized that tibial and femoral bone morphology would be significantly correlated with tunnel widening after anatomic ACL reconstruction. METHODS: Forty-nine consecutive patients (mean age 21.8 ± 8.1 years) who underwent primary single-bundle anatomic ACL reconstruction with hamstring autograft were enrolled...
March 4, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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/28255568/association-between-lateral-posterior-tibial-slope-body-mass-index-and-acl-injury-risk
#10
Katherine M Bojicic, Mélanie L Beaulieu, Daniel Y Imaizumi Krieger, James A Ashton-Miller, Edward M Wojtys
BACKGROUND: While body mass index (BMI), a modifiable parameter, and knee morphology, a nonmodifiable parameter, have been identified as risk factors for anterior cruciate ligament (ACL) rupture, the interaction between them remains unknown. An understanding of this interaction is important because greater compressive axial force (perhaps due to greater BMI) applied to a knee that is already at an increased risk because of its geometry, such as a steep lateral posterior tibial slope, could further increase the probability of ACL injury...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28249973/the-long-term-clinical-and-radiological-outcomes-in-patients-who-suffer-recurrent-injuries-to-the-anterior-cruciate-ligament-after-reconstruction
#11
I Ahmed, L Salmon, J Roe, L Pinczewski
AIMS: The aim of this study was to investigate the long-term clinical and radiological outcome of patients who suffer recurrent injuries to the anterior cruciate ligament (ACL) after reconstruction and require revision surgery. PATIENTS AND METHODS: From a consecutive series of 200 patients who underwent primary reconstruction following rupture of the ACL, we identified 36 who sustained a further rupture, 29 of whom underwent revision surgery. Patients were reviewed prospectively at one, two, seven, 15 and about 20 years after their original surgery...
March 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28216753/anatomical-variation-of-posterior-slope-of-tibial-plateau-in-adult-eastern-indian-population
#12
Shyamalendu Medda, Rajib Kundu, Sohini Sengupta, Ananda Kisor Pal
BACKGROUND: Upper surface of the proximal tibial end, tibial plateau, has a slope directed posteroinferiorly relative to the long axis of the middle of the shaft. It has important consideration in surgeries such as knee arthroplasty, high tibial osteotomy, and medical imaging of the knee joint. The aim of the present study was to estimate the tibial plateau angle (TPA) by plain radiograph in the adult Eastern Indian population as during literature review, we were unable to find any study, except one (without specific reference axis), on this variable among the Indian population...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28213703/proximal-tibial-bony-and-meniscal-slopes-are-higher-in-acl-injured-subjects-than-controls-a-comparative-mri-study
#13
Ashraf Elmansori, Timothy Lording, Raphaël Dumas, Khalifa Elmajri, Philippe Neyret, Sébastien Lustig
PURPOSE: Increased tibial slope is reported as a risk factor of non-contact anterior cruciate ligament (ACL) injury, but the effect of the soft tissues on slope remains unclear. The primary aims of this study were to compare the tibial bony and soft tissue slopes between patients with and without ACL injury, and to investigate the relationship between the meniscal slopes (MS) and the tibial bony slope. Our hypothesis was that the menisci would correct the inclination of the bony tibial slope towards the horizontal...
February 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28210787/articular-surface-mounted-navigated-total-knee-arthroplasty-improves-the-reliability-of-component-alignment
#14
N D Clement, D MacDonald, A G Burgess, C R Howie
PURPOSE: The primary aim was to compare the early knee-specific functional outcome after articular surface mounted (ASM) navigation with non-navigated TKA. The secondary aims were to compare general physical and mental health improvement, patient satisfaction, and reliability of component alignment in the sagittal and coronal planes between ASM navigated TKA with that of non-navigated TKA. METHODS: Prospective functional outcome and radiographic data were collect for 123 patients undergoing ASM navigation and 172 patients undergoing non-navigated TKA by a high volume single surgeon...
February 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28182736/comparison-of-clinical-and-radiological-outcomes-between-opening-wedge-and-closing-wedge-high-tibial-osteotomy-a-comprehensive-meta-analysis
#15
Lingfeng Wu, Jun Lin, Zhicheng Jin, Xiaobin Cai, Weiyang Gao
High tibial osteotomy (HTO) has been widely used for clinical treatment of osteoarthritis of the medial compartment of the knee, and both opening-wedge and closing-wedge HTO are the most commonly used methods. However, it remains unclear which technique has better clinical and radiological outcomes in practice. To systematically evaluate this issue, we conducted a comprehensive meta-analysis by pooling all available data for the opening-wedge HTO and closing-wedge HTO techniques from the electronic databases including PubMed, Embase, Wed of Science and Cochrane Library...
2017: PloS One
https://www.readbyqxmd.com/read/28169100/three-dimensional-relationships-between-secondary-changes-and-selective-osteotomy-parameters-for-biplane-medial-open-wedge-high-tibial-osteotomy
#16
Byung Hoon Lee, Chul Won Ha, Sang Won Moon, Minho Chang, Hun Yeong Kim, Sin Hyung Park, Joon Ho Wang
BACKGROUND: To assess the axial rotational change of distal tibia and posterior tibial slope (PTS) change after OWHTO in 3-D planes and to identify the causal relationship on the effect of variation in the posterior slope angle and rotational errors. METHODS: A total of 21 patients (23 knees) underwent OWHTO and were evaluated with 3D-CT before and after surgery. Medial proximal tibial angle in the coronal plane, PTS in the sagittal plane, and rotational axis in axial plane were evaluated and compared between pre- and post-operative 3D models constructed by applying reverse-engineering software...
February 4, 2017: Knee
https://www.readbyqxmd.com/read/28169099/the-role-of-medial-meniscus-posterior-root-tear-and-proximal-tibial-morphology-in-the-development-of-spontaneous-osteonecrosis-and-osteoarthritis-of-the-knee
#17
Ryota Yamagami, Shuji Taketomi, Hiroshi Inui, Keitaro Tahara, Sakae Tanaka
BACKGROUND: Medial meniscus posterior root tear (MMPRT) has been reported to play a key role in the development of spontaneous osteonecrosis of the knee (SONK) and osteoarthritis (OA) of the knee. However, little is known about the differences in the development of SONK and OA after MMPRT. The purpose of this study was to investigate the factors contributing to the development of these conditions. METHODS: We evaluated the existence of MMPRT and the extent of medial meniscal extrusion in preoperative magnetic resonance images and proximal tibial morphology in radiographs of 45 patients with SONK and 104 patients with OA who underwent knee surgery...
February 3, 2017: Knee
https://www.readbyqxmd.com/read/28155061/do-ethnicity-and-gender-influence-posterior-tibial-slope
#18
Salvatore Bisicchia, Gavinca M Scordo, Johan Prins, Cosimo Tudisco
BACKGROUND: Ethnicity and gender can affect posterior tibial slope; however, studies on this topic have limitations and are in disagreement. The aim of the present study was to evaluate posterior tibial slope in a large group of consecutive patients, determining whether ethnicity and gender can influence its value. Secondly, to determine intra- and inter-rater reliability of the two radiographic methods adopted. MATERIALS AND METHODS: Posterior tibial slope was calculated (rater 1) in lateral view X-rays of the knee according to the posterior tibial cortex (PTC) and tibial proximal anatomical axis (TPAA) methods...
February 2, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28137553/can-three-dimensional-patient-specific-cutting-guides-be-used-to-achieve-optimal-correction-for-high-tibial-osteotomy-pilot-study
#19
M Munier, M Donnez, M Ollivier, X Flecher, P Chabrand, J-N Argenson, S Parratte
INTRODUCTION: Treatment of medial tibiofemoral osteoarthritis with a high-tibial osteotomy (HTO) is most effective when the optimal angular correction is achieved. However, conventional instrumentation is limited when multiplanar correction is needed. HYPOTHESIS: Use of patient-specific cutting guides (PSCGs) for HTO provides an accurate correction (difference<2°) relative to the preoperative planning. MATERIALS AND METHODS: Between February 2014 and February 2015, 10 patients (mean age: 46 years [range: 31-59]; grade 1 or 2 osteoarthritis in Ahlbäck's classification) were included prospectively in this reliability and safety study...
April 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28122388/clinical-study-of-3d-imaging-and-3d-printing-technique-for-patient-specific-instrumentation-in-total-knee-arthroplasty
#20
Bing Qiu, Fei Liu, Bensen Tang, Biyong Deng, Fang Liu, Weimin Zhu, Dong Zhen, Mingyuan Xue, Mingjiao Zhang
Patient-specific instrumentation (PSI) was designed to improve the accuracy of preoperative planning and postoperative prosthesis positioning in total knee arthroplasty (TKA). However, better understanding needs to be achieved due to the subtle nature of the PSI systems. In this study, 3D printing technique based on the image data of computed tomography (CT) has been utilized for optimal controlling of the surgical parameters. Two groups of TKA cases have been randomly selected as PSI group and control group with no significant difference of age and sex (p > 0...
January 25, 2017: Journal of Knee Surgery
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