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https://www.readbyqxmd.com/read/29683374/finite-element-analysis-of-the-effect-of-high-tibial-osteotomy-correction-angle-on-articular-cartilage-loading
#1
Zahra Trad, Abdelwahed Barkaoui, Moez Chafra, João Manuel Rs Tavares
Osteoarthritis is a globally common disease that imposes a considerable ongoing health and economic burden on the socioeconomic system. As more and more biomechanical factors have been explored, malalignment of the lower limb has been found to influence the load distribution across the articular surface of the knee joint substantially. In this work, a three-dimensional finite element analysis was carried out to investigate the effect of varying the high tibial osteotomy correction angle on the stress distribution in both compartments of the human knee joint...
April 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29682602/acute-perioperative-comparison-of-patient-specific-instrumentation-versus-conventional-instrumentation-utilization-during-bilateral-total-knee-arthroplasty
#2
Jerrod A Steimle, Michael T Groover, Brad A Webb, Brian J Ceccarelli
Utilizing patient-specific instrumentation during total knee arthroplasty has gained popularity in recent years with theoretical advantages in blood loss, intraoperative time, length of stay, postoperative alignment, and functional outcome, amongst others. No study has compared acute perioperative measures between patient-specific instrumentation and conventional instrumentation in the bilateral total knee arthroplasty setting. We compared patient-specific instrumentation versus conventional instrumentation in the setting of bilateral total knee arthroplasty to determine any benefits in the immediate perioperative period including surgical time, blood loss, pain medication use, length of stay, and discharge disposition...
2018: Surgery Research and Practice
https://www.readbyqxmd.com/read/29680906/hot-topic-alignment-in-total-knee-arthroplasty-systematic-versus-more-individualised-alignment-strategies
#3
EDITORIAL
Michael T Hirschmann, Jon Karlsson, Roland Becker
No abstract text is available yet for this article.
April 21, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29680583/pros-and-cons-a-balanced-view-of-robotics-in-knee-arthroplasty
#4
Jess H Lonner, Yale A Fillingham
In both unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA), compared with conventional techniques robotic technology has been shown to optimize the precision of bone preparation and component alignment, reducing outliers and increasing the percentage of components aligned within 2° or 3° of the target goal. In addition, soft tissue balance can be quantified through a range of motion in UKA and TKA using the various robotic technologies available. Although the presumption has been that the improved alignment associated with robotics will improve function and implant durability, there are limited data to support that notion...
March 30, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29679683/is-distal-femoral-torsion-the-same-in-both-of-a-patient-s-legs-morphometric-ct-study
#5
J-S Beranger, D Dujardin, J-F Taburet, P Boisrenoult, C Steltzlen, P Beaufils, N Pujol
INTRODUCTION: The rotational position of the femoral component is a primary driver of success in total knee arthroplasty. However, distal femoral torsion (DFT) varies greatly between individuals. Measuring DFT preoperatively by CT in combination with computer-assisted surgery can significantly improve the rotational positioning of the femoral component. However, a preoperative CT scan is costly and exposes the patient to radiation. These are doubled when the patient is undergoing bilateral arthroplasty...
April 18, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29678623/differences-in-subchondral-bone-plate-and-cartilage-thickness-between-women-with-anterior-cruciate-ligament-reconstructions-and-uninjured-controls
#6
Jennifer L Bhatla, Andres Kroker, Sarah L Manske, Carolyn A Emery, Steven K Boyd
OBJECTIVE: Anterior cruciate ligament (ACL) tears increase early onset osteoarthritis (OA) risk leading to cartilage and bone degradation. While the contribution of bone in OA development is unclear, evidence suggests that bone changes accompany cartilage degradation. This study aims to assess if regions with differences in subchondral bone plate thickness have differences in cartilage thickness when comparing ACL reconstructed (ACLR) knees of women ≥5 years post-injury to contralateral and controls with uninjured knees...
April 17, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29676961/development-and-preliminary-evaluation-of-a-new-anatomically-based-prosthetic-alignment-method-for-below-knee-prosthesis
#7
Nahid Tafti, Masoud Karimlou, Mohammad Ali Mardani, Amir Salar Jafarpisheh, Gholam Reza Aminian, Reza Safari
The objectives of current study were to a) assess similarities and relationships between anatomical landmark-based angles and distances of lower limbs in unilateral transtibial amputees and b) develop and evaluate a new anatomically based static prosthetic alignment method. First sub-study assessed the anthropometrical differences and relationships between the lower limbs in the photographs taken from amputees. Data were analysed via paired t-test and regression analysis. Results show no significant differences in frontal and transverse planes...
April 20, 2018: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/29667926/proximal-tibia-stress-fracture-with-osteoarthritis-of-knee-radiological-and-functional-analysis-of-one-stage-tka-with-long-stem
#8
Dhanasekaran Soundarrajan, Natesan Rajkumar, Palanisamy Dhanasekararaja, Shanmuganathan Rajasekaran
INTRODUCTION: Proximal tibia stress fractures with knee osteoarthritis pose a challenging situation. We evaluated the radiological and functional outcome of one-stage total knee arthroplasty (TKA) and long stem for patients with varied grades of knee arthritis and proximal tibia stress fractures.  Methods: We analysed 20 patients from April 2012 to March 2017 with proximal tibia stress fractures associated with knee osteoarthritis of varied grades. Out of 20 patients, five were acute fresh fractures...
2018: SICOT-J
https://www.readbyqxmd.com/read/29663012/medial-joint-line-elevation-of-the-tibia-measured-during-surgery-has-a-significant-correlation-with-the-limb-alignment-changes-following-medial-unicompartmental-knee-arthroplasty
#9
Yuichi Kuroda, Koji Takayama, Kazunari Ishida, Shinya Hayashi, Shingo Hashimoto, Masanori Tsubosaka, Takehiko Matsushita, Takahiro Niikura, Kotaro Nishida, Ryosuke Kuroda, Tomoyuki Matsumoto
PURPOSE: This study aimed to determine the correlation between the change in joint line height calculated from the resected bone and insert thickness during surgery and the change in limb alignment following unicompartmental knee arthroplasty (UKA). It was hypothesized that joint line elevation is correlated with the change in limb alignment. METHODS: A total of 74 consecutive patients diagnosed with either isolated medial compartmental osteoarthritis (38 patients) or spontaneous osteonecrosis of the knee (36 patients) were included...
April 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29662789/pie-crusting-technique-is-effective-and-safe-to-release-superficial-medial-collateral-ligament-for-total-knee-arthroplasty
#10
Xuan He, Hong Cai, Ke Zhang
Background: Pie-crusting technique is a damage-control soft tissue balance skill of total knee arthroplasty (TKA). The outcome of this technique to release lateral soft tissue is reasonable. A limited number of studies have focused on medial collateral ligament release with pie-crusting technique in the past years because of concerns about its efficacy and safety. Method: All cases underwent superficial medial collateral ligament (SMCL) release with either pie-crusting technique or traditional technique (39 knees in each group) between January 1, 2014 and August 31, 2015...
April 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29657851/kinematic-alignment-technique-for-total-hip-and-knee-arthroplasty-the-personalized-implant-positioning-surgery
#11
Charles Rivière, Stefan Lazic, Loïc Villet, Yann Wiart, Sarah Muirhead Allwood, Justin Cobb
Conventional techniques for hip and knee arthroplasty have led to good long-term clinical outcomes, but complications remain despite better surgical precision and improvements in implant design and quality.Technological improvements and a better understanding of joint kinematics have facilitated the progression to 'personalized' implant positioning (kinematic alignment) for total hip (THA) and knee (TKA) arthroplasty, the true value of which remains to be determined.By achieving a true knee resurfacing, the kinematic alignment (KA) technique for TKA aims at aligning the components with the physiological kinematic axes of the knee and restoring the constitutional tibio-femoral joint line frontal and axial orientation and soft-tissue laxity...
March 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29657839/current-concepts-for-aligning-knee-implants-patient-specific-or-systematic
#12
REVIEW
Charles Rivière, Stefan Lazic, Oliver Boughton, Yann Wiart, Loic Vïllet, Justin Cobb
Mechanical or anatomical alignment techniques create a supposedly 'biomechanically friendly' but often functionally limited prosthetic knee.Alternative techniques for alignment in total knee arthroplasty (TKA) aim at being more anatomical and patient-specific, aiming to improve functional outcomes after TKA.The kinematic alignment (KA) technique for TKA has shown good early clinical outcomes. Its role in extreme anatomical variation remains to be defined.The restricted KA technique for TKA might be a reasonable option for patients with extreme anatomical variation...
January 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29653241/navigation-for-lower-limb-alignment-during-internal-fixation-of-complex-tibial-plateau-fractures
#13
B Vibert, R Pailhé, V Morin, B Rubens-Duval, D Saragaglia
In complex fractures of the proximal tibial metaphysis and epiphysis, possible adverse outcomes after internal fixation include not only joint surface incongruity, but also lower limb malalignment requiring revision surgery. Navigation has been proven effective for the intra-operative control of lower limb alignment during osteotomy and knee arthroplasty. In complex traumatic fractures, temporary fixation by a locking screw plate allows sensor positioning followed by navigation manoeuvres to adjust lower limb alignment...
April 10, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29643592/does-trampoline-or-hard-surface-jumping-influence-lower-extremity-alignment
#14
Kiyokazu Akasaka, Akihiro Tamura, Aoi Katsuta, Ayako Sagawa, Takahiro Otsudo, Yu Okubo, Yutaka Sawada, Toby Hall
[Purpose] To determine whether repetitive trampoline or hard surface jumping affects lower extremity alignment on jump landing. [Subjects and Methods] Twenty healthy females participated in this study. All subjects performed a drop vertical jump before and after repeated maximum effort trampoline or hard surface jumping. A three-dimensional motion analysis system and two force plates were used to record lower extremity angles, moments, and vertical ground reaction force during drop vertical jumps. [Results] Knee extensor moment after trampoline jumping was greater than that after hard surface jumping...
December 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29629614/physical-impairments-in-adults-with-ankle-osteoarthritis-a-systematic-review-and-meta-analysis
#15
Munira Mohammed Al-Mahrouqi, David Allan MacDonald, Bill Vicenzino, Michelle Dawn Smith
Study Design Systematic review with meta-analysis. Background Lower limb osteoarthritis (OA) is associated with pain and reduced function. Most research focusses on hip and knee OA related impairments and as consequence impairments that characterise ankle OA are not well understood. Objective To systematically review available evidence of physical impairments in individuals with ankle OA. Methods A comprehensive search of electronic databases was conducted up until July 2017. Studies were screened using pre-defined inclusion/exclusion criteria...
April 7, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29627257/robotic-arm-assisted-vs-conventional-unicompartmental-knee-arthroplasty-the-2-year-clinical-outcomes-of-a-randomized-controlled-trial
#16
Alisdair Gilmour, Angus D MacLean, Philip J Rowe, Matthew S Banger, Iona Donnelly, Bryn G Jones, Mark J G Blyth
BACKGROUND: Unicompartmental knee arthroplasty (UKA) for treatment of medial compartment osteoarthritis has potential benefits over total knee arthroplasty but UKA has a higher revision rate. Robotic-assisted UKA is increasingly common and offers more accurate implant positioning and limb alignment, lower early postoperative pain but evidence of functional outcome is lacking. The aim was to assess the clinical outcomes of a single-centre, prospective, randomised controlled trial, comparing robotic-arm-assisted UKA with conventional surgery...
February 21, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29623574/does-patient-specific-instrumentation-improve-femoral-and-tibial-component-alignment-in-total-knee-arthroplasty-a-prospective-randomized-study
#17
Artur Stolarczyk, Lukasz Nagraba, Tomasz Mitek, Magda Stolarczyk, Jarosław Michał Deszczyński, Maciej Jakucinski
Alignment of the prosthesis is one of the most significant factors that affect the long-term clinical outcome following total knee arthroplasty (TKA). There is conflicting evidence whether patient-specific instrumentation (PSI) for TKA improves the component position compared to standard instrumentation. This study aimed to compare the rotational alignment of the femoral and tibial components in TKA patients when performed with either conventional or PSI. Sixty patients with primary knee osteoarthritis were randomly divided into two groups treated surgically with TKA: one with conventional instrumentation and the other with the Visionaire PSI system (Smith and Nephew, Memphis, TN)...
April 6, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29619124/the-value-of-phenotypes-in-knee-osteoarthritis-research
#18
REVIEW
Fred R T Nelson
Background: Over the past decade, phenotypes have been used to help categorize knee osteoarthritis patients relative to being subject to disease, disease progression, and treatment response. A review of potential phenotype selection is now appropriate. The appeal of using phenotypes is that they most rely on simple physical examination, clinically routine imaging, and demographics. The purpose of this review is to describe the panoply of phenotypes that can be potentially used in osteoarthritis research...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29618149/ankle-and-hindfoot-symptoms-after-medial-open-wedge-high-tibial-osteotomy
#19
Siddharth Mahesh Shah, Jason Roberts, Frederic Picard
Medial open wedge high tibial osteotomy (MOWHTO) is a commonly performed procedure for symptomatic medial compartment osteoarthritis (OA). However, little is known about its effects on ipsilateral ankle or hindfoot. The aim of our study was to determine the incidence of ankle or hindfoot problems after MOWHTO and examine its association with radiological indices. Thirty-five knees (32 patients) undergoing navigated MOWHTO were evaluated for the presence of new-onset ankle or hindfoot symptoms after surgery...
April 4, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29609637/primary-total-knee-arthroplasty-using-constrained-condylar-knee-design-for-severe-deformity-and-stiffness-of-knee-secondary-to-post-traumatic-arthritis
#20
Saroj Rai, Xianzhe Liu, Xiaobo Feng, Bimal Rai, Nira Tamang, Jing Wang, Shunan Ye, Shuhua Yang
BACKGROUND: Key to a successful outcome of total knee arthroplasty (TKA) is to attain optimum alignment, adequate balance, and deformity correction. In primary TKA, this can be achieved efficiently by posterior stabilized (PS) design with or without the sub-periosteal release. However, certain circumstances such as post-traumatic arthritis are often associated with severe deformities with a significant bone defect, stiffness, and instability. Such deformities are extremely difficult to balance with soft tissue release only and require additionally constrained prostheses even in primary TKA...
April 2, 2018: Journal of Orthopaedic Surgery and Research
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